2006
Lekacz, H.; Karcz, W.
The effect of auxins (IAA and 4-CL-IAA) on the redox activity and medium pH of Zea mays L. root segments Journal Article
In: Cellular and Molecular Biology Letters, vol. 11, no. 3, pp. 376-383, 2006, ISSN: 14258153, (4).
@article{2-s2.0-33749334664,
title = {The effect of auxins (IAA and 4-CL-IAA) on the redox activity and medium pH of Zea mays L. root segments},
author = { H. Lekacz and W. Karcz},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749334664&doi=10.2478%2fs11658-006-0031-5&partnerID=40&md5=479d95ba2868cac3272e7c662d10b3cf},
doi = {10.2478/s11658-006-0031-5},
issn = {14258153},
year = {2006},
date = {2006-01-01},
journal = {Cellular and Molecular Biology Letters},
volume = {11},
number = {3},
pages = {376-383},
publisher = {BioMed Central Ltd.},
abstract = {Indole-3-acetic acid (IAA) and 4-chloroindole-3-acetic acid (4-Cl-IAA) were tested at different concentrations and times for their capacity to change the redox activity and medium pH of maize root segments. The dose-response surfaces (dose-response curves as a function of time) plotted for redox activity and changes in medium pH (expressed as ΔpH) had a similar shape for both auxins, but differed significantly at the optimal concentrations. With 4-Cl-IAA, the maximal values of redox activity and medium pH changes were observed at 10-10 M, which was a 100-fold lower concentration than with IAA. Correlations were observed between redox activity and medium pH changes at the optimal concentrations of both IAA and 4-Cl-IAA. The results are discussed herein, taking into account both the concentration of the auxins and the effects produced by them. © 2006 by the University of Wrocław.},
note = {4},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Indole-3-acetic acid (IAA) and 4-chloroindole-3-acetic acid (4-Cl-IAA) were tested at different concentrations and times for their capacity to change the redox activity and medium pH of maize root segments. The dose-response surfaces (dose-response curves as a function of time) plotted for redox activity and changes in medium pH (expressed as ΔpH) had a similar shape for both auxins, but differed significantly at the optimal concentrations. With 4-Cl-IAA, the maximal values of redox activity and medium pH changes were observed at 10-10 M, which was a 100-fold lower concentration than with IAA. Correlations were observed between redox activity and medium pH changes at the optimal concentrations of both IAA and 4-Cl-IAA. The results are discussed herein, taking into account both the concentration of the auxins and the effects produced by them. © 2006 by the University of Wrocław.
1995
Karcz, W.; Stolarek, J.; Lekacz, H.; Kurtyka, R.; Burdach, Z.
Comparative investigation of auxin and fusicoccin-induced growth and H+-extrusion in coleoptile segments of Zea mays L. Journal Article
In: Acta Physiologiae Plantarum, vol. 17, no. 1, pp. 3-8, 1995, ISSN: 01375881, (21).
@article{2-s2.0-0029167655,
title = {Comparative investigation of auxin and fusicoccin-induced growth and H+-extrusion in coleoptile segments of Zea mays L.},
author = { W. Karcz and J. Stolarek and H. Lekacz and R. Kurtyka and Z. Burdach},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029167655&partnerID=40&md5=7755bf1251e0f139cd47c60d5d3428b4},
issn = {01375881},
year = {1995},
date = {1995-01-01},
journal = {Acta Physiologiae Plantarum},
volume = {17},
number = {1},
pages = {3-8},
abstract = {[No abstract available]},
note = {21},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
[No abstract available]
1994
Kubik-Dobosz, G.; Turska, A.; Lekacz, H.; Karcz, W.; Buczek, J.
The Effect of inhibitors of plasma membrane H+-Atpask and oxidoreductases on NH4+ uptake by pisum arvense roots Journal Article
In: Acta Societatis Botanicorum Poloniae, vol. 63, no. 3-4, pp. 287-292, 1994, ISSN: 00016977, (1).
@article{2-s2.0-84988646139,
title = {The Effect of inhibitors of plasma membrane H+-Atpask and oxidoreductases on NH4+ uptake by pisum arvense roots},
author = { G. Kubik-Dobosz and A. Turska and H. Lekacz and W. Karcz and J. Buczek},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84988646139&doi=10.5586%2fasbp.1994.039&partnerID=40&md5=8d6c14534dc5acc5473cc21997d09dd6},
doi = {10.5586/asbp.1994.039},
issn = {00016977},
year = {1994},
date = {1994-01-01},
journal = {Acta Societatis Botanicorum Poloniae},
volume = {63},
number = {3-4},
pages = {287-292},
publisher = {Polskie Towarzystwo Botaniczne},
abstract = {The effect of inhibitors of plasma membrane oxidoreductases (quinacrine and dicumarol) and H~-ATPase (dicyclohexylcar- bodiimide and orthovanadate) on ammonium uptake by Pis urn arvense seedlings and the activities of H+ -A TPasc and N ADI1- ferricyanidc oxidorcductase was investigated. The uptake solution contained 50 μM NH4+. In 1 h experiments, quinacrine and dicumarol depressed strongly and irreversibly the rate of NRi+ uptake and markedly inhibited the activity of NADH-ferri- cyanidc oxidoreduciase in the plasma membrane vesicles prepared from root cells. Simultaneously, sodium orthovanadate inhibited the activity of plasma membrane H+-ATPase increased the rate of NHV uptake. Dicyclohexylcarbodiimidc inhibited iT-ATPase activity and increased efflux of NH+ from roots to ambient solution. The results indicate on the lack of direct connection between uptake rate of 50 p.M NH4+ and H+-ATPase activity, and suggest that membrane redox systems play a predominant role in this process.},
note = {1},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The effect of inhibitors of plasma membrane oxidoreductases (quinacrine and dicumarol) and H~-ATPase (dicyclohexylcar- bodiimide and orthovanadate) on ammonium uptake by Pis urn arvense seedlings and the activities of H+ -A TPasc and N ADI1- ferricyanidc oxidorcductase was investigated. The uptake solution contained 50 μM NH4+. In 1 h experiments, quinacrine and dicumarol depressed strongly and irreversibly the rate of NRi+ uptake and markedly inhibited the activity of NADH-ferri- cyanidc oxidoreduciase in the plasma membrane vesicles prepared from root cells. Simultaneously, sodium orthovanadate inhibited the activity of plasma membrane H+-ATPase increased the rate of NHV uptake. Dicyclohexylcarbodiimidc inhibited iT-ATPase activity and increased efflux of NH+ from roots to ambient solution. The results indicate on the lack of direct connection between uptake rate of 50 p.M NH4+ and H+-ATPase activity, and suggest that membrane redox systems play a predominant role in this process.