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Quelques Modifications Physico‐chimiques et Physiologiques liées à la Sénescence des Feuilles
Author(s) -
VIGNES DOMINIQUE,
CALMÉS JEAN
Publication year - 1975
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.1399-3054.1975.tb03791.x
Subject(s) - chemistry , photophosphorylation , abscission , botany , photosynthesis , carboxylation , chlorophyll , biochemistry , biology , chloroplast , organic chemistry , catalysis , gene
During the senescence of the leaves of Parthenocissus tricuspidata Planchon, the high level of Ca 2+ ions liberated from pectic membranes in the aqueous medium of the blade causes a decrease in photophosphorylation and chlorophyll regeneration, while carboxylation and diffusion resistances increase. After the hydrolysis of its carbohydrate and protein reserves, the leaf blade can no longer contribute to the nutrition of the plant and abscission is prepared.