2002
Włoch, W.; Mazur, E.; Bełtowski, M.
Formation of spiral grain in the wood of Pinus sylvestris L. Journal Article
In: Trees - Structure and Function, vol. 16, no. 4-5, pp. 306-312, 2002, ISSN: 09311890, (23).
@article{2-s2.0-0036586682,
title = {Formation of spiral grain in the wood of Pinus sylvestris L.},
author = { W. Włoch and E. Mazur and M. Bełtowski},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036586682&doi=10.1007%2fs00468-002-0174-6&partnerID=40&md5=183632494d4bfe0a24fa62df42071e35},
doi = {10.1007/s00468-002-0174-6},
issn = {09311890},
year = {2002},
date = {2002-01-01},
journal = {Trees - Structure and Function},
volume = {16},
number = {4-5},
pages = {306-312},
abstract = {In cambium producing wood of increasing spirality, the angle of inclination of fusiform cells to the stem axis is augmented with time. Frequently, events such as pseudotransverse anticlinal divisions and intrusive growth between radial walls do not explain the relatively large rate of change in the angle. The present analysis of the cambium of Pinus sylvestris L. indicates that the large rate of change in the angle of a cell inclination is caused by oriented intrusive growth of initial cells in certain files, entering the space between the tangential walls of neighbouring files. Such intrusive growth of the initial cell ends is caused by a deflection of the ends of neighbouring initial cells in the radial direction. A periclinal division plane does not reach the deflected end. This results in two derivatives, unequal in size, the shorter of which remains an initial cell, whereas the longer becomes a xylem or phloem mother cell. When these events are intensive, they cause a rapid change of cell inclination along the stem axis. Such a rapid change can take place even without oblique anticlinal divisions.},
note = {23},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In cambium producing wood of increasing spirality, the angle of inclination of fusiform cells to the stem axis is augmented with time. Frequently, events such as pseudotransverse anticlinal divisions and intrusive growth between radial walls do not explain the relatively large rate of change in the angle. The present analysis of the cambium of Pinus sylvestris L. indicates that the large rate of change in the angle of a cell inclination is caused by oriented intrusive growth of initial cells in certain files, entering the space between the tangential walls of neighbouring files. Such intrusive growth of the initial cell ends is caused by a deflection of the ends of neighbouring initial cells in the radial direction. A periclinal division plane does not reach the deflected end. This results in two derivatives, unequal in size, the shorter of which remains an initial cell, whereas the longer becomes a xylem or phloem mother cell. When these events are intensive, they cause a rapid change of cell inclination along the stem axis. Such a rapid change can take place even without oblique anticlinal divisions.
1996
Kurczyńska, E. U.; Bełtowski, M.; Włoch, W.
Morphological and anatomical changes of scots pine dwarf shoots induced by air pollutants Journal Article
In: Environmental and Experimental Botany, vol. 36, no. 2, pp. 185-197, 1996, ISSN: 00988472, (6).
@article{2-s2.0-0030186842,
title = {Morphological and anatomical changes of scots pine dwarf shoots induced by air pollutants},
author = { E.U. Kurczyńska and M. Bełtowski and W. Włoch},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030186842&doi=10.1016%2f0098-8472%2896%2901005-2&partnerID=40&md5=fcd2e84ff4223d090e1504987c01b84c},
doi = {10.1016/0098-8472(96)01005-2},
issn = {00988472},
year = {1996},
date = {1996-01-01},
journal = {Environmental and Experimental Botany},
volume = {36},
number = {2},
pages = {185-197},
publisher = {Elsevier B.V.},
abstract = {This study refers to the observation of Leyton and Juniper, that the Scots pine needle bases surrounded by multiple layers of dead scales can absorb water from dew or mist. It is suggested that this ability provides an additional site of entry for toxins originating from air pollutants. In connection with this hypothesis investigations were carried out on the dwarf shoots of Pinus sylvestris L. trees growing in different areas along an air pollution gradient. The damages to the needles, the 'weathering' of the sheath scale surrounding the base of the dwarf shoots, and the decay of surface cells in the basal part of the shoot apex in the axil of the needles and on the adaxial surface of the needles were measured. All of them were exacerbated by increased pollution.},
note = {6},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This study refers to the observation of Leyton and Juniper, that the Scots pine needle bases surrounded by multiple layers of dead scales can absorb water from dew or mist. It is suggested that this ability provides an additional site of entry for toxins originating from air pollutants. In connection with this hypothesis investigations were carried out on the dwarf shoots of Pinus sylvestris L. trees growing in different areas along an air pollution gradient. The damages to the needles, the 'weathering' of the sheath scale surrounding the base of the dwarf shoots, and the decay of surface cells in the basal part of the shoot apex in the axil of the needles and on the adaxial surface of the needles were measured. All of them were exacerbated by increased pollution.