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Effect of manganese ions on benzyladenine‐induced growth and chlorophyll synthesis in excised cucumber cotyledons
Author(s) -
Mudliar Anita,
Bharti Sudhakar
Publication year - 1984
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.1399-3054.1984.tb05181.x
Subject(s) - cucumis , endogeny , manganese , chlorophyll , electron paramagnetic resonance , shoot , chemistry , horticulture , chlorophyll a , botany , biology , biochemistry , nuclear magnetic resonance , physics , organic chemistry
The behaviour of endogenous Mn 2+ was studied by electron spin resonance spectro‐scopy during benzyladenine‐induced growth of excised cucumber ( Cucumis sativis L. cv. Long green) cotyledons. The level of endogenous Mn 2+ was decreased by ben‐zyladenine treatment, most pronounced after 96 h. MnCl 2 applied alone promoted chlorophyll synthesis at relatively low concentrations but in the presence of ben‐zyladenine higher concentrations of MnCl 2 were required for stimulation of chlorophyll synthesis. A pronounced increase in growth was observed when Mn 2+ was applied with benzyladenine at 96 h, when the decline in the endogenous level of paramagnetic Mn 2+ was maximal.