Changes in the activities of IAA oxidase, peroxidase, ascorbic acid utilization and in the endogenous level of paramagnetic Mn++ during benzyladenine-induced growth of excised cucumber cotyledons

Bharti, S.; Laloraya, M.M.

Biochemie und Physiologie der Pflanzen 176(5): 447-453

1981


DOI: 10.1016/s0015-3796(81)80038-8
Accession: 000836364

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Abstract
Benzyladenine (BA) inhibited IAA-oxidase and peroxidase activities and ascorbic acid utilization during the first 24 h after treatment, particularly in darkness, but later there was an enhancement of these activities. Changes in peroxidase activity showed an inverse correlation with changes in the level of endogenous Mn++ in BA-treated cucumber cotyledons in the light. The absence of a similar correlation in BA-treated cotyledons in darkness was primarily due to the absence of chloroplasts but could also be due to a paucity of phenolic substances which are largely synthesized in the light.