Ethylene in the proliferation of cultured plant cells: Regulating or just going along?

Ethylene in the proliferation of cultured plant cells: Regulating or just going along? Ethylene, being one of five classical plant phytohormones is involved in regulation of numerous physiological processes. There are contradictory data about the effect of ethylene on the cell growth and division; although it is accepted that in culture flasks, the content of ethylene rises to a few tens of μL/L and production of ethylene is associated with the periods of active growth of the cells in vitro. We revealed a strong correlation (r = 0.96) between ethylene production and specific rate of dry weight accumulation in suspension cell cultures of Ajuga turkestanica, heterotrophic and mixotrophic strains of Arabidopsis thaliana, Beta vulgaris, Euonymus maximoviczianus, Medicago sativa, Panax ginseng, and Triticum timopheevii. In heterotrophic cell culture of A. thaliana, the peaks and general shape of the curves describing dynamics of ethylene production, the number of S-phase cells, and specific rate of increase in cell number coincided in log phase and in the phase of growth deceleration. Pretreatment of subculture inoculum with 100 μL/L ethylene caused doubling of S-phase cell number after 3-h-long culturing in fresh nutrient medium. It was found that exogenous ethylene affects the number of S-phase cells only when the level of endogenously produced ethylene is low. Russian Journal of Plant Physiology Springer Journals

Ethylene in the proliferation of cultured plant cells: Regulating or just going along?

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Pleiades Publishing
Copyright © 2015 by Pleiades Publishing, Ltd.
Life Sciences; Plant Physiology; Plant Sciences
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