Influence of metabolic stress on the inheritance of cell determination in the moss

Autor:	A. Dovgalyuk, O. Lobachevska, N. Kit, O. Khorkavtsiv, D. Cove, N. Kyjak, Rostyslav Stoika, R. Ripetsky, O. Klyuchivska
Rok vydání:	2005
Předmět:	Sucrose biology Vegetative reproduction Cell Biology General Medicine biology.organism_classification Moss Bryopsida chemistry.chemical_compound Murashige and Skoog medium chemistry Botany Kinetin Protonema Abscisic acid
Zdroj:	Cell Biology International. 29:181-186
ISSN:	1065-6995
DOI:	10.1016/j.cellbi.2005.02.001
Popis:	Epigenetically-determined apogamy in aposporous regenerants of the moss Pottia intermedia persists during vegetative propagation, the capacity of apogamy being inherited by individual aposporous protonemal cells. To test Bauer-Lazarenko's proposal that stable apogamy in mosses may be due to some self-replicating cytoplasmic factor, the effects of different metabolic stress treatments on the expression of apogamy have been tested. Chronic metabolic stress caused by long-term growth of autotrophic aposporous protonema on mineral medium with 0.25% of casamino acids and on Murashiga-Skoog (MS) medium with sucrose and phytohormones, as well as by transitory action of high kinetin concentration, have a much stronger influence on the expression of apogamy, than short-term stress treatments with RNase and Pb(2+). Apogamy has been found to be lost stably, after prolonged growth on MS medium containing kinetin and ABA. The proposal that the capacity for apogamy is related to the release of aposporous protonemal cells from a putative factor for apogamy is discussed.
Databáze:	OpenAIRE
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