EFFECT OF ISOSMOTIC LEVELS OF SALTS AND PEG-6000 ON ENZYMES IN GERMINATING PEA-SEEDS

被引：3
|
作者：
SINGH, M
SINGH, BB
机构：
[1] Department of Crop Physiology, N.D. University of Agriculture and Technology, U.P, 224 229, Narendra Nagar, Kumarganj, Faizabad
来源：
BIOLOGIA PLANTARUM | 1992年 / 34卷 / 5-6期
关键词：
D O I：
10.1007/BF02923591
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Effects of iso-osmotic levels of salts (NaCl, CaCl2, Na2SO4) and PEG-6000 on the activity of hydrolytic and nitrogen assimilatory enzymes in pea embryo axis and cotyledon were studied. The activity of nitrate reductase and nitrite reductase in embryo axis and cotyledon and the activity of protease and alpha-amylase in cotyledon decreased with decreasing medium osmotic potential as compared to control at all the stages of seedling growth. The activity of protease and amylase increases with increasing levels of stress in embryo axis. Sodium chloride induced. stress had more deleterious effects on the activity of nitrate reductase, nitrite reductase and alpha-amylase followed by other salts and PEG-6000. On the other hand, CaCl2 induced salt stress was more depressive for protease activity. The maximum increase in the activity of protease and amylase was observed in embryo axis at higher concentration of salts and PEG-6000.
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页码：415 / 422
页数：8
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