NDLI: Effect of nickel on growth, proliferation, and differentiation of root cells in Triticum aestivum seedlings

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Russian Journal of Plant Physiology : Volume 52, Issue 1, January 2005

Russian Journal of Plant Physiology : Volume 51

Russian Journal of Plant Physiology : Volume 50

Russian Journal of Plant Physiology : Volume 49

Russian Journal of Plant Physiology : Volume 48

Russian Journal of Plant Physiology : Volume 47

Effect of nickel on growth, proliferation, and differentiation of root cells in Triticum aestivum seedlings

Content Provider	Springer Nature Link
Author	Demchenko, N. P. Kalimova, I. B. Demchenko, K. N.
Copyright Year	2005
Abstract	The effect of 10$^{−6}$ and 10$^{−4}$ M NiSO$_{4}$ on cell growth, proliferation, and differentiation was studied over 48 h in seminal and lateral roots of five-day-old Triticum aestivum seedlings. 10$^{−6}$ M NiSO$_{4}$ did not significantly affect the root system, whereas 10$^{−4}$ M NiSO$_{4}$ inhibited its development. However, 10$^{−6}$ M NiSO$_{4}$ disturbed the contacts between the groups of closely related cells of the rhizodermis in the meristem. In the exodermis, an additional layer of cells was formed. At the nickel concentration of 10$^{−4}$ M, cell divisions in the outer layers of the root cells and metaxylem ceased earlier than in other root tissues positioned both centripetally and acropetally. Differentiation of protophloem sieve elements was completed in the meristem but at a greater distance from the root tip. Cell elongation started at the same distance from the root tip as in control plants. The rate of elongation decreased, and acropetally it stopped. Therefore, the cells of the xylem and metaphloem started to differentiate, and primordia of lateral roots were initiated and formed closer to the root tip. At a lethal concentration (10$^{−4}$ M), nickel induced necroses of elongating cells of the endodermis and pericycle. Nickel is supposed to enter the tissues of the central cylinder predominantly via the protoxylem and rapidly translocate along the xylem. As a result, the incubation of the roots at this concentration for 48 h almost did not affect the development of the phloem and probably sugar unloading, that makes possible to maintain the growth of meristematic cells and the cell division of the most important tissues for longer time.
Starting Page	220
Ending Page	228
Page Count	9
File Format	PDF
ISSN	10214437
Journal	Russian Journal of Plant Physiology
Volume Number	52
Issue Number	2
e-ISSN	16083407
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2005-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Triticum aestivum root meristem primordium nickel growth cell proliferation cell differentiation Plant Sciences Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Plant Science

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