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PHYTOKININS AND SENESCENCE IN BROCCOLI
Author(s) -
MacLean David C.,
Dedolph Richard R.
Publication year - 1964
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1964.tb06679.x
Subject(s) - biology , respiration , oxidative phosphorylation , respiration rate , senescence , botany , cytokinin , phos , adenosine triphosphate , horticulture , biochemistry , microbiology and biotechnology , auxin , gene
The respiratory pattern of broccoli bud clusters treated with N 6 ‐benzyladenine at harvest or at daily intervals thereafter was similar to that of at‐harvest‐treated broccoli. The treatment effect did not diminish with time but was conditioned by the degree of physiological degeneration of the tissue prior to treatment. Respiration quotients indicated that the rate of oxidative decarboxylation and phosphorylation was reduced in tissues treated with N 6 ‐benzyladenine. Higher organic phosphorus content was observed in treated tissue, and 2,4‐dinitrophenol overcame the N 6 ‐benzyladenine‐induced respiration inhibition. It is suggested that the mode of action of phytokinins on respiration and senescence inhibition was due to a conservation of adenosine triphosphate in treated tissue.