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Electron-cytochemical study of Ca2+ in cotyledon cells of soybean seedlings grown in microgravityMicrogravity and horizontal clinorotation are known to cause the rearrangement of the structural-functional organization of plant cells, leading to accelerated aging. Altered gravity conditions resulted in an increase in the droplets volume in cells and the destruction of chloroplast structure in Arabidopsis thaliana plants, an enhancement of cytosolic autophagaous processes, an increase in the respiration rate and a greater number of multimolecular forms of succinate- and malate dehydrogenases in cells of the Funaria hygrometrica protonema and Chlorella vulgaris, and changes in calcium balance of cells. Because ethylene is known to be involved in cell aging and microgravity appears to speed the process, and because soybean seedlings grown in space produce higher ethylene levels we asked: 1) does an acceleration of soybean cotyledon cell development and aging occur in microgravity? 2) what roles do Ca2+ ions and the enhanced ethylene level play in these events? Therefore, the goal of our investigation was to examine of the interaction of microgravity and ethylene on the localization of Ca2+ in cotyledon mesophyll of soybean seedlings.
Document ID
Document Type
Reprint (Version printed in journal)
Nedukha, O. (Institute of Botany Kiev, Ukraine)
Brown, C. S.
Kordyum, E.
Piastuch, W. C.
Guikema, J. A.
Date Acquired
August 21, 2013
Publication Date
July 1, 1999
Publication Information
Publication: Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology
Volume: 6
Issue: 1
ISSN: 1077-9248
Subject Category
Life Sciences (General)
Distribution Limits
Flight Experiment
short duration
STS-87 Shuttle Project
NASA Discipline Plant Biology
Non-NASA Center
NASA Experiment Number 9600001