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Compositional changes associated with plasma membrane thickening during floral induction of spinach
Author(s) -
Penel Claude,
Auderset Guy,
Bernardini Nicola,
Castillo Federico J.,
Greppin Hubert,
Morré D. James
Publication year - 1988
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.1399-3054.1988.tb09204.x
Subject(s) - spinacia , spinach , membrane , phospholipid , thickening , biophysics , darkness , glycolipid , chemistry , chromatography , cell wall , composition (language) , biochemistry , biology , botany , gene , linguistics , philosophy , chloroplast , polymer science
Floral induction in the long‐day plant spinach ( Spinacia oleracea L. cv. Nobel) was accompanied by a thickening of the plasma membrane. Densitometry analyses showed that the light space of the dark‐light‐dark pattern of the membrane was not changed upon photoinduction. Rather, the increase was due to an enhancement of the dark layer adjacent to the cell wall. Parallel analyses of protein and phospholipid composition revealed no marked changes in protein composition or biosynthetic rate, protein phosphorylation, glycolipids and/or phospholipids as a result of the 24 h of continuous light sufficient to induce flowering. Photoinduction, however, was accompanied by an increase in the relative amount of plasma membrane sterols which may be related to the membrane thickening.