摘要
砂基培养大豆,盐胁迫下进行水杨酸(salicylic acid,SA)处理,NaC l胁迫和SA处理的预定浓度分别为0+0(对照)、100+0、100+0.3、200+0、200+0.3 mmol/L。结果表明:SA处理后提高盐胁迫下大豆叶绿素(chlorophyll,chl)含量及chla/chlb的比值,增强超氧化物歧化酶(superoxide d ismutase,SOD)和过氧化物酶(peroxidase,POD)的活性,抑制过氧化氢酶(calatase,CAT)活性,减少丙二醛(malond ialdehyde,MDA)积累,降低质膜透性。因此综合各项生长和生理指标表明,SA处理有利于提高大豆抗氧化能力,降低活性氧危害,增强膜稳定性,缓解盐害,增强其抗盐性,且SA对NaC l 100 mmol/L胁迫的大豆生长缓解效应优于NaC l 200 mmol/L胁迫的。
The seedhngs culturea with Hoagland solution were treated with sancync acid （SA）0.3mmol/ L under NaCl 100 and 200 mmol/L stress. The result showed that SA increased the chlorophyll content and the chla/ chlb ratio, enhanced SOD and POD activities, inhibited CAT activity, decreased MDA content, 02^- accumulation and the leaf relative conductivity. Therefore, the determination of growth and physiology parameters indicated that the antioxidant ability of seedlings was raised, the injuries of seedlings induced by active oxygen was mitigated and the membrane stability was raised with SA under salt stress. The effect of SA on seedlings growth un- der NaCl 100 mmol/L Stress is better than that under NaCl 200 mmol/L stress.
出处
《安徽科技学院学报》
2006年第4期8-11,共4页
Journal of Anhui Science and Technology University
关键词
水杨酸
大豆
盐胁迫
抗氧化酶
膜稳定性
Salicylic acid
Soybean
Salt stress
Antioxidant ability
Membrane stability
