摘要
研究了水杨酸对盐胁迫下黄瓜幼苗生长抑制的缓解效应及其机制。结果证明 ,盐胁迫条件下水杨酸能提高幼苗相对含水量 ,降低 Na+、K+向上运输的选择性 ,通过促进子叶内超氧化物歧化酶、过氧化物酶活性降低膜脂过氧化产物丙二醛含量和质膜透性 。
Mitigative effect of salicylic acid on salt stress-induced growth inhibition of cucumber seedling and its machanism were studied.The results showed that,under salt stress,salicylic acid could increase the relative water content of seedling,decrease the transportation selectivity of Na +?K + to shoot (S\-\{Na +?K +\}),reduce the content of malon-dialdehyde (product of membrane lipid peroxidation ) and the plasmalemma permeability by promoting the activity of membrane-protective enzymes such as superoxide dismutase and peroxidase,therefore the growth inhibition caused by salt stress were mitigated by exogenous salicylic acid in cucumber seedling.
出处
《西北植物学报》
CAS
CSCD
2002年第2期401-405,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金资助项目 ( 394 70 5 81)
关键词
水杨酸
盐胁迫
黄瓜幼苗
生长抑制
缓解效应
salicylic acid
salt stress
cucumber seedling
growth inhibition
mitigative effect
