• dr Michał Ludynia
Stanowisko: Adiunkt
Jednostka: Wydział Nauk Przyrodniczych
Adres: 40-032 Katowice, ul. Jagiellońska 28
Piętro: II
Numer pokoju: A-228
Telefon: (32) 2009 561
E-mail: michal.ludynia@us.edu.pl
Spis publikacji: Spis wg CINiBA
Spis publikacji: Spis wg OPUS
Scopus Author ID: 55185274200
Publikacje z bazy Scopus
2023
Szwajczak, E.; Sierka, E. M.; Ludynia, M.
In: Cells, vol. 12, no. 5, 2023, ISSN: 20734409.
@article{2-s2.0-85149641698,
title = {Potential Role of Low-Molecular-Weight Dioxolanes as Adjuvants for Glyphosate-Based Herbicides Using Photosystem II as an Early Post-Treatment Determinant},
author = { E. Szwajczak and E.M. Sierka and M. Ludynia},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85149641698&doi=10.3390%2fcells12050777&partnerID=40&md5=52bde89e0a66232247c639101f748260},
doi = {10.3390/cells12050777},
issn = {20734409},
year = {2023},
date = {2023-01-01},
journal = {Cells},
volume = {12},
number = {5},
publisher = {MDPI},
abstract = {Pesticide use cannot be completely abandoned in modern agriculture. Among agrochemicals, glyphosate is one of the most popular and, at the same time, most divisive herbicide. Since the chemicalization of agriculture is detrimental, various attempts are being made to reduce it. Adjuvants—substances that increase the efficiency of foliar application—can be used to reduce the amount of herbicides used. We propose low-molecular-weight dioxolanes as adjuvants for herbicides. These compounds quickly convert to carbon dioxide and water and do not harm plants. The aim of this study was to evaluate the efficacy of RoundUp® 360 Plus supported by three potential adjuvants: 2,2-dimethyl-1,3-dioxolane (DMD), 2,2,4-trimethyl-1,3-dioxolane (TMD), and (2;2-dimethyl-1;3-dioxan-4-yl)methanol (DDM), on a common weed species Chenopodium album L., under greenhouse conditions. Chlorophyll a fluorescence parameters and analysis of the polyphasic fluorescence (OJIP) curve, which examines changes in the photochemical efficiency of photosystem II, were used to measure plant sensitivity to glyphosate stress and verified the efficacy achieved by tested formulations. The effective dose (ED) values obtained showed that the weed tested was sensitive to reduced doses of glyphosate, with 720 mg/L needed to achieve 100% effectiveness. Compared to the glyphosate assisted with DMD, TMD, and DDM, ED was reduced by 40%, 50%, and 40%, respectively. The application of all dioxolanes at a concentration equal to 1 vol.% significantly enhanced the herbicide’s effect. Our study showed that for C. album there was a correlation between the change in OJIP curve kinetics and the applied dose of glyphosate. By analyzing the discrepancies in the curves, it is possible to show the effect of different herbicide formulations with or without dioxolanes at an early stage of its action, thus minimizing the time for testing new substances as adjuvants. © 2023 by the authors.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Pesticide use cannot be completely abandoned in modern agriculture. Among agrochemicals, glyphosate is one of the most popular and, at the same time, most divisive herbicide. Since the chemicalization of agriculture is detrimental, various attempts are being made to reduce it. Adjuvants—substances that increase the efficiency of foliar application—can be used to reduce the amount of herbicides used. We propose low-molecular-weight dioxolanes as adjuvants for herbicides. These compounds quickly convert to carbon dioxide and water and do not harm plants. The aim of this study was to evaluate the efficacy of RoundUp® 360 Plus supported by three potential adjuvants: 2,2-dimethyl-1,3-dioxolane (DMD), 2,2,4-trimethyl-1,3-dioxolane (TMD), and (2;2-dimethyl-1;3-dioxan-4-yl)methanol (DDM), on a common weed species Chenopodium album L., under greenhouse conditions. Chlorophyll a fluorescence parameters and analysis of the polyphasic fluorescence (OJIP) curve, which examines changes in the photochemical efficiency of photosystem II, were used to measure plant sensitivity to glyphosate stress and verified the efficacy achieved by tested formulations. The effective dose (ED) values obtained showed that the weed tested was sensitive to reduced doses of glyphosate, with 720 mg/L needed to achieve 100% effectiveness. Compared to the glyphosate assisted with DMD, TMD, and DDM, ED was reduced by 40%, 50%, and 40%, respectively. The application of all dioxolanes at a concentration equal to 1 vol.% significantly enhanced the herbicide’s effect. Our study showed that for C. album there was a correlation between the change in OJIP curve kinetics and the applied dose of glyphosate. By analyzing the discrepancies in the curves, it is possible to show the effect of different herbicide formulations with or without dioxolanes at an early stage of its action, thus minimizing the time for testing new substances as adjuvants. © 2023 by the authors.
2021
Siemieniuk, A.; Ludynia, M.; Rudnicka, M.
Response of two crop plants, zea mays L. and solanum lycopersicum L., to diclofenac and naproxen Journal Article
In: International Journal of Molecular Sciences, vol. 22, no. 16, 2021, ISSN: 16616596, (2).
@article{2-s2.0-85112585300,
title = {Response of two crop plants, zea mays L. and solanum lycopersicum L., to diclofenac and naproxen},
author = { A. Siemieniuk and M. Ludynia and M. Rudnicka},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85112585300&doi=10.3390%2fijms22168856&partnerID=40&md5=722aa3ca679ff78e9ec1fb956546d84f},
doi = {10.3390/ijms22168856},
issn = {16616596},
year = {2021},
date = {2021-01-01},
journal = {International Journal of Molecular Sciences},
volume = {22},
number = {16},
publisher = {MDPI AG},
abstract = {Among numerous contaminants, the ubiquitous occurrence of nonsteroidal anti-inflammatory drugs (NSAIDs) in the environment and their plausible harmful impact on nontarget organisms have made them one of the most important areas of concern in recent years. Crop plants can also potentially be exposed to NSAIDs, since the concentration of these pharmaceuticals is constantly rising in the surface water and soil. Our goal was to evaluate the stress response of two crop plants, maize and tomato, to treatment with selected NSAIDs, naproxen and diclofenac. The focus of the research was on the growth response, photosynthetic efficiency, selected oxidative stress factors (such as the H2O2 level and the rate of lipid peroxidation) as well as the total phenolic content, which represents the non-enzymatic protectants against oxidative stress. The results indicate that susceptibility to the NSAIDs that were tested is dependent on the plant species. A higher sensitivity of tomato manifested in growth inhibition, a decrease in the content of the photosynthetic pigments and a reduction in the maximum quantum efficiency of PSII and the activity of PSII, which was estimated using the Fv/Fm and Fv/F0 ratios. Based on the growth results, it was also possible to reveal that diclofenac had a more toxic effect on tomato. In contrast to tomato, in maize, neither the content of the photosynthetic pigments nor growth appeared to be affected by DFC and NPX. However, both drugs significantly decreased in maize Fv and Fm, which are particularly sensitive to stress. A higher H2O2 concentration accompanied, in most cases, increasing lipid peroxidation, indicating that oxidative stress occurred in response to the selected NSAIDs in the plant species that were studied. The higher phenolic content of the plants after NSAIDs treatment may, in turn, indicate the activation of defense mechanisms in response to the oxidative stress that is triggered by these drugs. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.},
note = {2},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Among numerous contaminants, the ubiquitous occurrence of nonsteroidal anti-inflammatory drugs (NSAIDs) in the environment and their plausible harmful impact on nontarget organisms have made them one of the most important areas of concern in recent years. Crop plants can also potentially be exposed to NSAIDs, since the concentration of these pharmaceuticals is constantly rising in the surface water and soil. Our goal was to evaluate the stress response of two crop plants, maize and tomato, to treatment with selected NSAIDs, naproxen and diclofenac. The focus of the research was on the growth response, photosynthetic efficiency, selected oxidative stress factors (such as the H2O2 level and the rate of lipid peroxidation) as well as the total phenolic content, which represents the non-enzymatic protectants against oxidative stress. The results indicate that susceptibility to the NSAIDs that were tested is dependent on the plant species. A higher sensitivity of tomato manifested in growth inhibition, a decrease in the content of the photosynthetic pigments and a reduction in the maximum quantum efficiency of PSII and the activity of PSII, which was estimated using the Fv/Fm and Fv/F0 ratios. Based on the growth results, it was also possible to reveal that diclofenac had a more toxic effect on tomato. In contrast to tomato, in maize, neither the content of the photosynthetic pigments nor growth appeared to be affected by DFC and NPX. However, both drugs significantly decreased in maize Fv and Fm, which are particularly sensitive to stress. A higher H2O2 concentration accompanied, in most cases, increasing lipid peroxidation, indicating that oxidative stress occurred in response to the selected NSAIDs in the plant species that were studied. The higher phenolic content of the plants after NSAIDs treatment may, in turn, indicate the activation of defense mechanisms in response to the oxidative stress that is triggered by these drugs. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Bzdęga, K.; Zarychta, A.; Urbisz, A.; Szporak-Wasilewska, S.; Ludynia, M.; Fojcik, B.; Tokarska-Guzik, B.
In: Ecological Indicators, vol. 121, 2021, ISSN: 1470160X, (7).
@article{2-s2.0-85097586350,
title = {Geostatistical models with the use of hyperspectral data and seasonal variation – A new approach for evaluating the risk posed by invasive plants},
author = { K. Bzdęga and A. Zarychta and A. Urbisz and S. Szporak-Wasilewska and M. Ludynia and B. Fojcik and B. Tokarska-Guzik},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097586350&doi=10.1016%2fj.ecolind.2020.107204&partnerID=40&md5=d94836fea21a30c97a86f9a1e40534b8},
doi = {10.1016/j.ecolind.2020.107204},
issn = {1470160X},
year = {2021},
date = {2021-01-01},
journal = {Ecological Indicators},
volume = {121},
publisher = {Elsevier B.V.},
abstract = {The general trend of ongoing plant invasion and the increasing number of species that may become invasive in the future, force seeking solutions that can improve the efficiency and economy of their management. Thus, we applied a novel approach combining the use of geostatistical interpolators such as ordinary kriging (OK) and co-kriging (CK) with environmental and hyperspectral data to evaluate the potential threat associated with the distribution of invasive plant species and to predict their probabilities of occurrence above the selected threshold of 10%. The specific spatial patterns of the probability of occurrence of Heracleum sosnowskyi and Fallopia spp. were modelled in two study areas in southern Poland. The significant achievement of this study was the application of geostatistical tools producing results characterized by a degree of precision quantified by cross-validation errors, and prediction errors after field verification. OK and CK returned root mean squared error (RMSE) values in a range from 0.21 to 0.51 and 0.21 to 0.47, respectively. For OK and CK, the prediction errors resulting from field verification in the following year were between 0.03–0.39, and 0.03–0.29, respectively. Additionally, the study provided the first prediction maps (2D) and Digital Prediction Models (DPMs) (3D) visualizations of the probability of occurrence of both invasive plants. Although the proposed approach is illustrated with real case studies related to Heracleum sosnowskyi and Fallopia spp., it could be extended to other species. This demonstrates the potential of an effective alternative strategy for evaluating the risk posed by invasive plants, that will be able to provide fast, low cost and effective prediction and monitoring of their spread. For institutions dealing with invasive plants, this may be beneficial and help to reduce the negative consequences of their improper management. © 2020 University of Silesia},
note = {7},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The general trend of ongoing plant invasion and the increasing number of species that may become invasive in the future, force seeking solutions that can improve the efficiency and economy of their management. Thus, we applied a novel approach combining the use of geostatistical interpolators such as ordinary kriging (OK) and co-kriging (CK) with environmental and hyperspectral data to evaluate the potential threat associated with the distribution of invasive plant species and to predict their probabilities of occurrence above the selected threshold of 10%. The specific spatial patterns of the probability of occurrence of Heracleum sosnowskyi and Fallopia spp. were modelled in two study areas in southern Poland. The significant achievement of this study was the application of geostatistical tools producing results characterized by a degree of precision quantified by cross-validation errors, and prediction errors after field verification. OK and CK returned root mean squared error (RMSE) values in a range from 0.21 to 0.51 and 0.21 to 0.47, respectively. For OK and CK, the prediction errors resulting from field verification in the following year were between 0.03–0.39, and 0.03–0.29, respectively. Additionally, the study provided the first prediction maps (2D) and Digital Prediction Models (DPMs) (3D) visualizations of the probability of occurrence of both invasive plants. Although the proposed approach is illustrated with real case studies related to Heracleum sosnowskyi and Fallopia spp., it could be extended to other species. This demonstrates the potential of an effective alternative strategy for evaluating the risk posed by invasive plants, that will be able to provide fast, low cost and effective prediction and monitoring of their spread. For institutions dealing with invasive plants, this may be beneficial and help to reduce the negative consequences of their improper management. © 2020 University of Silesia
2020
Kapkowski, M.; Ludynia, M.; Rudnicka, M.; Dzida, M.; Zorębski, E.; Musiał, M.; Doležal, M.; Polanski, J.
Enhancing the CO2 capturing ability in leaf via xenobiotic auxin uptake Journal Article
In: Science of the Total Environment, vol. 745, 2020, ISSN: 00489697.
@article{2-s2.0-85088658034,
title = {Enhancing the CO2 capturing ability in leaf via xenobiotic auxin uptake},
author = { M. Kapkowski and M. Ludynia and M. Rudnicka and M. Dzida and E. Zorębski and M. Musiał and M. Doležal and J. Polanski},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85088658034&doi=10.1016%2fj.scitotenv.2020.141032&partnerID=40&md5=12dd8848414c0aaacdd414b283ab1142},
doi = {10.1016/j.scitotenv.2020.141032},
issn = {00489697},
year = {2020},
date = {2020-01-01},
journal = {Science of the Total Environment},
volume = {745},
publisher = {Elsevier B.V.},
abstract = {Plants are masterpieces of evolution that is based on carbon chemistry. In particular, plant leaves are biosynthetic factories able to convert CO2 into carbohydrates and oxygen. It is worth noting that mimicking the efficiency of a natural plant and natural leaf is still a challenge for contemporary chemistry. We can even better realize this when we notice that a plant and an industrial factory are equivalent in meaning. On the other hand, green technologies are under development in a quest for the artificial leaf. If we could modify the synthetic pathways in leaves, we could also design green chemistry schemes in natural leaves to produce useful chemicals or to digest wastes or toxins. Specifically, can we intensify the potential for capturing atmospheric CO2 in leaves? Auxins are plant hormones that control the growth and development of plants. Herein, we determined whether we could efficiently transport xenobiotic auxin into leaves and if so, whether this supply could enhance the metabolism and CO2 capturing ability. By exploring a series of dioxolanes as potential enhancers of auxin transport, we discovered for the first time that a small molecular compound, 2,2-dimethyl-1,3-dioxolane (DMD), enhances the xenobiotic auxin transport to leaves, which boosts the metabolism that is measured by H2O2 production as well as CO2 capturing ability in leaves. © 2020 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Plants are masterpieces of evolution that is based on carbon chemistry. In particular, plant leaves are biosynthetic factories able to convert CO2 into carbohydrates and oxygen. It is worth noting that mimicking the efficiency of a natural plant and natural leaf is still a challenge for contemporary chemistry. We can even better realize this when we notice that a plant and an industrial factory are equivalent in meaning. On the other hand, green technologies are under development in a quest for the artificial leaf. If we could modify the synthetic pathways in leaves, we could also design green chemistry schemes in natural leaves to produce useful chemicals or to digest wastes or toxins. Specifically, can we intensify the potential for capturing atmospheric CO2 in leaves? Auxins are plant hormones that control the growth and development of plants. Herein, we determined whether we could efficiently transport xenobiotic auxin into leaves and if so, whether this supply could enhance the metabolism and CO2 capturing ability. By exploring a series of dioxolanes as potential enhancers of auxin transport, we discovered for the first time that a small molecular compound, 2,2-dimethyl-1,3-dioxolane (DMD), enhances the xenobiotic auxin transport to leaves, which boosts the metabolism that is measured by H2O2 production as well as CO2 capturing ability in leaves. © 2020 Elsevier B.V.
2019
Rudnicka, M.; Ludynia, M.; Karcz, W.
In: International Journal of Molecular Sciences, vol. 20, no. 7, 2019, ISSN: 16616596, (5).
@article{2-s2.0-85064822948,
title = {Effects of naphthazarin (DHNQ) combined with lawsone (NQ-2-OH) or 1,4-naphthoquinone (NQ) on the auxin-induced growth of zea mays L. coleoptile segments},
author = { M. Rudnicka and M. Ludynia and W. Karcz},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85064822948&doi=10.3390%2fijms20071788&partnerID=40&md5=519ba84ec7918f2374c28a97c20e6518},
doi = {10.3390/ijms20071788},
issn = {16616596},
year = {2019},
date = {2019-01-01},
journal = {International Journal of Molecular Sciences},
volume = {20},
number = {7},
publisher = {MDPI AG},
abstract = {Naphthoquinones, plants secondary metabolites are known for their antibacterial, antifungal, anti-inflammatory, anti-cancer and anti-parasitic properties. The biological activity of naphthoquinones is connected with their ability to generate reactive oxygen species and to modify biological molecules at their nucleophilic sites. In our research, the effect of naphthazarin (DHNQ) combined with 2-hydroxy-1,4-naphthoquinone (NQ-2-OH) or 1,4-naphthoquinone (1;4-NQ) on the elongation growth, pH changes of the incubation medium, oxidative stress and redox activity of maize coleoptile cells were investigated. This paper describes experiments performed with maize (Zea mays L.) coleoptile segments, which is a classical model system to study plant cell elongation growth. The data presented clearly demonstrate that lawsone and 1,4-naphthoquinone combined with naphthazarin, at low concentrations (1 and 10 nM), reduced the endogenous and IAA-induced (Indole-3-Acetic Acid) elongation growth of maize coleoptile segments. Those changes in growth correlated with the proton concentration in the incubation medium, which suggests that the changes in the growth of maize coleoptile segments observed in the presence of naphthoquinones are mediated through the activity of PM H+-ATPase. The presence of naphthoquinones induced oxidative stress in the maize coleoptile tissue by producing hydrogen peroxide and causing changes in the redox activity. Moreover, the incubation of maize segments with both naphthoquinones combined with naphthazarin resulted in lipid peroxidation and membrane damage. The regulation of PM H+-ATPase activity, especially its inhibition, may result from two major types of reaction: first, a direct interaction between an enzyme and naphthoquinone, which leads to the covalent modification of the protein thiols and the generation of thioethers, which have been found to alter the activity of the PM H+-ATPases; second, naphthoquinones induce reactive oxygen species (ROS) production, which inhibits PM H+-ATPases by increasing cytosolic Ca2+ . This harmful effect was stronger when naphthazarin and 1,4-naphthoquinone were added together. Taking these results into account, it can be suggested that by combining naphthoquinones in small quantities, an alternative to synthetic pesticides could be developed. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.},
note = {5},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Naphthoquinones, plants secondary metabolites are known for their antibacterial, antifungal, anti-inflammatory, anti-cancer and anti-parasitic properties. The biological activity of naphthoquinones is connected with their ability to generate reactive oxygen species and to modify biological molecules at their nucleophilic sites. In our research, the effect of naphthazarin (DHNQ) combined with 2-hydroxy-1,4-naphthoquinone (NQ-2-OH) or 1,4-naphthoquinone (1;4-NQ) on the elongation growth, pH changes of the incubation medium, oxidative stress and redox activity of maize coleoptile cells were investigated. This paper describes experiments performed with maize (Zea mays L.) coleoptile segments, which is a classical model system to study plant cell elongation growth. The data presented clearly demonstrate that lawsone and 1,4-naphthoquinone combined with naphthazarin, at low concentrations (1 and 10 nM), reduced the endogenous and IAA-induced (Indole-3-Acetic Acid) elongation growth of maize coleoptile segments. Those changes in growth correlated with the proton concentration in the incubation medium, which suggests that the changes in the growth of maize coleoptile segments observed in the presence of naphthoquinones are mediated through the activity of PM H+-ATPase. The presence of naphthoquinones induced oxidative stress in the maize coleoptile tissue by producing hydrogen peroxide and causing changes in the redox activity. Moreover, the incubation of maize segments with both naphthoquinones combined with naphthazarin resulted in lipid peroxidation and membrane damage. The regulation of PM H+-ATPase activity, especially its inhibition, may result from two major types of reaction: first, a direct interaction between an enzyme and naphthoquinone, which leads to the covalent modification of the protein thiols and the generation of thioethers, which have been found to alter the activity of the PM H+-ATPases; second, naphthoquinones induce reactive oxygen species (ROS) production, which inhibits PM H+-ATPases by increasing cytosolic Ca2+ . This harmful effect was stronger when naphthazarin and 1,4-naphthoquinone were added together. Taking these results into account, it can be suggested that by combining naphthoquinones in small quantities, an alternative to synthetic pesticides could be developed. © 2019 by the authors. Licensee MDPI, Basel, Switzerland.
Rudnicka, M.; Ludynia, M.; Karcz, W.
The effect of naphthazarin on the growth, electrogenicity, oxidative stress, and microtubule array in Z. Mays coleoptile cells treated with IAA Journal Article
In: Frontiers in Plant Science, vol. 9, 2019, ISSN: 1664462X, (8).
@article{2-s2.0-85062730921,
title = {The effect of naphthazarin on the growth, electrogenicity, oxidative stress, and microtubule array in Z. Mays coleoptile cells treated with IAA},
author = { M. Rudnicka and M. Ludynia and W. Karcz},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062730921&doi=10.3389%2ffpls.2018.01940&partnerID=40&md5=152e6cc69e812dbcc06e9ae50a10b1fb},
doi = {10.3389/fpls.2018.01940},
issn = {1664462X},
year = {2019},
date = {2019-01-01},
journal = {Frontiers in Plant Science},
volume = {9},
publisher = {Frontiers Media S.A.},
abstract = {Naphthazarin (5;8-dihydroxy-1;4-naphthoquinone; DHNQ) is a naturally occurring 1,4-naphthoquinone derivative. In this study, we focused on elucidating the toxic effect of this secondary metabolite on the growth of plant cells. The dose–response curves that were obtained for the effects of DHNQ on endogenous and IAA-induced growth in maize coleoptile segments differ in shape; in the first case, it is linear, while in the presence of auxin it is bell-shaped with the maximum at 1 µM. It was found that DHNQ at almost all concentrations studied, when added to the incubation medium inhibited endogenous growth (excluding naphthazarin at 0.001 µM) as well as growth in the presence of IAA. Simultaneous measurements of the growth and external medium pH of coleoptile segments indicated that DHNQ diminished or eliminated proton extrusion at all of the concentrations that were used. Interestingly, the oxidative stress in maize coleoptile cells, which was measured as hydrogen peroxide (H 2 O 2 ) production, catalase activity, redox activity and malondialdehyde (MDA) content, increased at the lower concentrations of DHNQ (<1 µM), thus suggesting a specific character of its action. It was also found that naphthazarin at concentration higher than 0.1 µM caused the depolarization of the membrane potential (E m ). An analysis of the organization and anisotropy of the cortical microtubules showed that naphthazarin at all of the concentrations that were studied changed the IAA-induced transverse microtubule reorientation to an oblique reorientation. Our results indicate that naphthazarin diminished the growth of maize coleoptile cells by a broad spectrum of its toxic effects, thereby suggesting that naphthazarin might be a hypothetical component of new bioherbicides and biopesticides. © 2019 Rudnicka, Ludynia and Karcz.},
note = {8},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Naphthazarin (5;8-dihydroxy-1;4-naphthoquinone; DHNQ) is a naturally occurring 1,4-naphthoquinone derivative. In this study, we focused on elucidating the toxic effect of this secondary metabolite on the growth of plant cells. The dose–response curves that were obtained for the effects of DHNQ on endogenous and IAA-induced growth in maize coleoptile segments differ in shape; in the first case, it is linear, while in the presence of auxin it is bell-shaped with the maximum at 1 µM. It was found that DHNQ at almost all concentrations studied, when added to the incubation medium inhibited endogenous growth (excluding naphthazarin at 0.001 µM) as well as growth in the presence of IAA. Simultaneous measurements of the growth and external medium pH of coleoptile segments indicated that DHNQ diminished or eliminated proton extrusion at all of the concentrations that were used. Interestingly, the oxidative stress in maize coleoptile cells, which was measured as hydrogen peroxide (H 2 O 2 ) production, catalase activity, redox activity and malondialdehyde (MDA) content, increased at the lower concentrations of DHNQ (<1 µM), thus suggesting a specific character of its action. It was also found that naphthazarin at concentration higher than 0.1 µM caused the depolarization of the membrane potential (E m ). An analysis of the organization and anisotropy of the cortical microtubules showed that naphthazarin at all of the concentrations that were studied changed the IAA-induced transverse microtubule reorientation to an oblique reorientation. Our results indicate that naphthazarin diminished the growth of maize coleoptile cells by a broad spectrum of its toxic effects, thereby suggesting that naphthazarin might be a hypothetical component of new bioherbicides and biopesticides. © 2019 Rudnicka, Ludynia and Karcz.
2018
Rudnicka, M.; Ludynia, M.; Karcz, W.
In: Plant Growth Regulation, vol. 84, no. 1, pp. 107-122, 2018, ISSN: 01676903, (9).
@article{2-s2.0-85029784691,
title = {A comparison of the effects of 1,4-naphthoquinone and 2-hydroxy-1,4-naphthoquinone (lawsone) on indole-3-acetic acid (IAA)-induced growth of maize coleoptile cells},
author = { M. Rudnicka and M. Ludynia and W. Karcz},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029784691&doi=10.1007%2fs10725-017-0325-9&partnerID=40&md5=ef2c82714d7abab030552a7db9f7ed59},
doi = {10.1007/s10725-017-0325-9},
issn = {01676903},
year = {2018},
date = {2018-01-01},
journal = {Plant Growth Regulation},
volume = {84},
number = {1},
pages = {107-122},
publisher = {Springer Netherlands},
abstract = {The effects of 1,4-naphthoquinone (NQ) and 2-hydroxy-1,4-naphthoquinone (NQ-2-OH) on indole-3-acetic acid (IAA)-induced growth, medium pH changes and membrane potential (Em) in maize (Zea mays L.) coleoptile cells were determined. In addition, the redox cycling properties of both naphthoquinones were also compared. The dose-response curves constructed for the effects of NQ and NQ-2-OH on endogenous and IAA-induced growth differ in shape. It was found that NQ was by 10–50% more effective in inhibiting IAA-induced growth in maize coleoptile segments than NQ-2-OH. Simultaneous measurements of growth and external medium pH indicated that NQ and NQ-2-OH reduced or eliminated proton extrusion at all of the concentrations used, excluding NQ at 1 µM. It was found that both naphthoquinones at concentrations higher than 10 µM caused the depolarisation of the membrane potential (Em). Additionally, compared to the controls, NQ- and NQ-2-OH-exposure of coleoptile segments, at concentrations higher than 10 µM, caused an elevation of the hydrogen peroxide (H2O2) production and plasma membrane redox activity. The highest catalase activity was observed at 10 µM NQ and it was ca. 18-fold greater (at 4 h) than in the control medium. Moreover, it was also found that NQ and NQ-2-OH, at all concentrations studied, increased the malondialdehyde content of coleoptile segments at 4 h of the experiment. The data presented here are discussed taking into account the “acid growth hypothesis” of auxin action and the mechanisms by which naphthoquinones interact with biological systems. © 2017, The Author(s).},
note = {9},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The effects of 1,4-naphthoquinone (NQ) and 2-hydroxy-1,4-naphthoquinone (NQ-2-OH) on indole-3-acetic acid (IAA)-induced growth, medium pH changes and membrane potential (Em) in maize (Zea mays L.) coleoptile cells were determined. In addition, the redox cycling properties of both naphthoquinones were also compared. The dose-response curves constructed for the effects of NQ and NQ-2-OH on endogenous and IAA-induced growth differ in shape. It was found that NQ was by 10–50% more effective in inhibiting IAA-induced growth in maize coleoptile segments than NQ-2-OH. Simultaneous measurements of growth and external medium pH indicated that NQ and NQ-2-OH reduced or eliminated proton extrusion at all of the concentrations used, excluding NQ at 1 µM. It was found that both naphthoquinones at concentrations higher than 10 µM caused the depolarisation of the membrane potential (Em). Additionally, compared to the controls, NQ- and NQ-2-OH-exposure of coleoptile segments, at concentrations higher than 10 µM, caused an elevation of the hydrogen peroxide (H2O2) production and plasma membrane redox activity. The highest catalase activity was observed at 10 µM NQ and it was ca. 18-fold greater (at 4 h) than in the control medium. Moreover, it was also found that NQ and NQ-2-OH, at all concentrations studied, increased the malondialdehyde content of coleoptile segments at 4 h of the experiment. The data presented here are discussed taking into account the “acid growth hypothesis” of auxin action and the mechanisms by which naphthoquinones interact with biological systems. © 2017, The Author(s).
2013
Burian, A.; Ludynia, M.; Uyttewaal, M.; Traas, J.; Boudaoud, A.; Hamant, O.; Kwiatkowska, D.
A correlative microscopy approach relates microtubule behaviour, local organ geometry, and cell growth at the Arabidopsis shoot apical meristem Journal Article
In: Journal of Experimental Botany, vol. 64, no. 18, pp. 5753-5767, 2013, ISSN: 00220957, (37).
@article{2-s2.0-84891507470,
title = {A correlative microscopy approach relates microtubule behaviour, local organ geometry, and cell growth at the Arabidopsis shoot apical meristem},
author = { A. Burian and M. Ludynia and M. Uyttewaal and J. Traas and A. Boudaoud and O. Hamant and D. Kwiatkowska},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84891507470&doi=10.1093%2fjxb%2fert352&partnerID=40&md5=6c5bf7791016042f4e33afccbf0e69d1},
doi = {10.1093/jxb/ert352},
issn = {00220957},
year = {2013},
date = {2013-01-01},
journal = {Journal of Experimental Botany},
volume = {64},
number = {18},
pages = {5753-5767},
abstract = {Cortical microtubules (CMTs) are often aligned in a particular direction in individual cells or even in groups of cells and play a central role in the definition of growth anisotropy. How the CMTs themselves are aligned is not well known, but two hypotheses have been proposed. According to the first hypothesis, CMTs align perpendicular to the maximal growth direction, and, according to the second, CMTs align parallel to the maximal stress direction. Since both hypotheses were formulated on the basis of mainly qualitative assessments, the link between CMT organization, organ geometry, and cell growth is revisited using a quantitative approach. For this purpose, CMT orientation, local curvature, and growth parameters for each cell were measured in the growing shoot apical meristem (SAM) of Arabidopsis thaliana. Using this approach, it has been shown that stable CMTs tend to be perpendicular to the direction of maximal growth in cells at the SAM periphery, but parallel in the cells at the boundary domain. When examining the local curvature of the SAM surface, no strict correlation between curvature and CMT arrangement was found, which implies that SAM geometry, and presumed geometry-derived stress distribution, is not sufficient to prescribe the CMT orientation. However, a better match between stress and CMTs was found when mechanical stress derived from differential growth was also considered. © The Author 2013. Published by Oxford University Press on behalf of the Society for Experimental Biology.},
note = {37},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Cortical microtubules (CMTs) are often aligned in a particular direction in individual cells or even in groups of cells and play a central role in the definition of growth anisotropy. How the CMTs themselves are aligned is not well known, but two hypotheses have been proposed. According to the first hypothesis, CMTs align perpendicular to the maximal growth direction, and, according to the second, CMTs align parallel to the maximal stress direction. Since both hypotheses were formulated on the basis of mainly qualitative assessments, the link between CMT organization, organ geometry, and cell growth is revisited using a quantitative approach. For this purpose, CMT orientation, local curvature, and growth parameters for each cell were measured in the growing shoot apical meristem (SAM) of Arabidopsis thaliana. Using this approach, it has been shown that stable CMTs tend to be perpendicular to the direction of maximal growth in cells at the SAM periphery, but parallel in the cells at the boundary domain. When examining the local curvature of the SAM surface, no strict correlation between curvature and CMT arrangement was found, which implies that SAM geometry, and presumed geometry-derived stress distribution, is not sufficient to prescribe the CMT orientation. However, a better match between stress and CMTs was found when mechanical stress derived from differential growth was also considered. © The Author 2013. Published by Oxford University Press on behalf of the Society for Experimental Biology.
2012
Uyttewaal, M.; Burian, A.; Alim, K.; Landrein, B.; Borowska-Wykrt, D.; Dedieu, A.; Peaucelle, A.; Ludynia, M.; Traas, J.; Boudaoud, A.; Kwiatkowska, D.; Hamant, O.
Mechanical stress acts via Katanin to amplify differences in growth rate between adjacent cells in Arabidopsis Journal Article
In: Cell, vol. 149, no. 2, pp. 439-451, 2012, ISSN: 00928674, (303).
@article{2-s2.0-84859771647,
title = {Mechanical stress acts via Katanin to amplify differences in growth rate between adjacent cells in Arabidopsis},
author = { M. Uyttewaal and A. Burian and K. Alim and B. Landrein and D. Borowska-Wykrt and A. Dedieu and A. Peaucelle and M. Ludynia and J. Traas and A. Boudaoud and D. Kwiatkowska and O. Hamant},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84859771647&doi=10.1016%2fj.cell.2012.02.048&partnerID=40&md5=24eb759f7d676173e05b18fa44f42459},
doi = {10.1016/j.cell.2012.02.048},
issn = {00928674},
year = {2012},
date = {2012-01-01},
journal = {Cell},
volume = {149},
number = {2},
pages = {439-451},
publisher = {Elsevier B.V.},
abstract = {The presence of diffuse morphogen gradients in tissues supports a view in which growth is locally homogenous. Here we challenge this view: we used a high-resolution quantitative approach to reveal significant growth variability among neighboring cells in the shoot apical meristem, the plant stem cell niche. This variability was strongly decreased in a mutant impaired in the microtubule-severing protein katanin. Major shape defects in the mutant could be related to a local decrease in growth heterogeneity. We show that katanin is required for the cell's competence to respond to the mechanical forces generated by growth. This provides the basis for a model in which microtubule dynamics allow the cell to respond efficiently to mechanical forces. This in turn can amplify local growth-rate gradients, yielding more heterogeneous growth and supporting morphogenesis. © 2012 Elsevier Inc.},
note = {303},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The presence of diffuse morphogen gradients in tissues supports a view in which growth is locally homogenous. Here we challenge this view: we used a high-resolution quantitative approach to reveal significant growth variability among neighboring cells in the shoot apical meristem, the plant stem cell niche. This variability was strongly decreased in a mutant impaired in the microtubule-severing protein katanin. Major shape defects in the mutant could be related to a local decrease in growth heterogeneity. We show that katanin is required for the cell's competence to respond to the mechanical forces generated by growth. This provides the basis for a model in which microtubule dynamics allow the cell to respond efficiently to mechanical forces. This in turn can amplify local growth-rate gradients, yielding more heterogeneous growth and supporting morphogenesis. © 2012 Elsevier Inc.