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Effect of α‐tocopherol on growth, membrane‐bound adenosine triphosphatase activity of the roots, membrane fluidity and potassium uptake in rice plants
Author(s) -
Tànczos Otto G.,
Erdei László,
Vigh László,
Kuipers Baukje,
Kuiper Pieter J. C.
Publication year - 1982
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1982.tb00294.x
Subject(s) - membrane , stimulation , oryza sativa , arrhenius plot , potassium , tocopherol , biochemistry , chemistry , adenosine triphosphatase , biophysics , atpase , biology , botany , enzyme , antioxidant , activation energy , vitamin e , endocrinology , organic chemistry , gene
The effect of application of α‐tocopherol on the physiology of young rice seedlings ( Oryza sativa L. cv. Dunghan Shali) was studied. Application of α‐tocopherol resulted in a growth stimulation of the shoots of 17.5% at the suboptimal 13°/8°C day/night temperature. Growth stimulation was accompanied by stimulation of K + ‐uptake of the roots and by stimulation of the Ca 2+ ‐stimulated ATPase activity of the microsomal fraction of the root cell membranes at low temperature in such a way that the non‐linearity (‘broken curve’) of the Arrhenius plot of control plants of this chilling‐sensitive species was absent and replaced by a linear relation, as in chillingresistant species. Application of α‐tocopherol also resulted in increased membrane fluidity, and the data are explained as a structural disordering effect of α‐tocopherol on the cell membranes of the rice seedlings.