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Effect of water stress on some oxidative enzymes and senescence in Vigna seedlings
Author(s) -
Mukherjee S. P.,
Choudhuri M. A.
Publication year - 1981
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.1399-3054.1981.tb06031.x
Subject(s) - catalase , senescence , peroxidase , vigna , oxidative stress , water stress , chlorophyll , oxidative enzyme , horticulture , enzyme , biology , polyphenol oxidase , enzyme assay , chemistry , botany , membrane permeability , biochemistry , microbiology and biotechnology , membrane
Seedlings of Vigna catjang Endl. were subjected to water stress for 6, S and 10 days by withholding water to investigate the activities of some oxidative enzymes and the pattern of senescence in leaves of 17‐day‐old seedlings undergoing water stress. Increasing duration of stress produced a proportional increase in the activities of IAA‐oxidase, AA‐oxidase, peroxidase and glycolate oxidase but decreased catalase activity and the contents of both chlorophyll and protein, hastening senescence. Leaf water potential and relative water content were also lowered with incresing duration of stress. Permeability was increased in leaf tissue undergoing water stress for 8 days. Seed treatment with CaCl 2 (10 −2 and 10 −14 M ) for 6 h improved the water status of leaves, decreased tissue permeability, activities of oxidative enzymes, decline of chlorophyll and protein contents and delayed senescence compared to untreated water stressed plants.