Plant cell in the process of the adaptation to simulated microgravity.
Analysis of structural-and-functional rearrangements in the organelles of meristematic, differentiating and differentiated cells of pea root under microgravity demonstrated certain consistencies in their manifestation, namely:  a) heterogeneity of the organelles in a cell population with respect to the degree of the rearrangements; b) coincidence of a spatial succession in development; c) increased reactivity under changes in functional load during cell growth and differentiation; d) enhanced activity when a cell loses its specific functions (replacement of functions).  It is assumed that microgravity does not prevent the development of certain adaptative reactions of organisms at the cellular level.
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N.G. Kholodny Institute of Botany, Academy of Science of the Ukrainian SSR, Kiev, USSR.
D000222:Adaptation, Physiological; D002454:Cell Differentiation / Q000502:physiology; D006112:Gravitation; D018519:Meristem / Q000502:physiology / Q000648:ultrastructure; D015388:Organelles / Q000502:physiology / Q000648:ultrastructure; D018532:Pisum sativum / Q000166:cytology* / Q000254:growth & development / Q000502:physiology*; D018517:Plant Roots / Q000166:cytology / Q000254:growth & development / Q000502:physiology; D018087:Plastids / Q000502:physiology / Q000648:ultrastructure; D012399:Rotation; D018474:Weightlessness Simulation