摘要
水分胁迫是影响植物生产力最普遍的环境因素之一。在水分胁迫下植物将发生一系列生理反应，其中细胞保护酶活性、膜透性、脯氨酸含量等生理参数可作为评价植物抗旱性强弱的指标（彭立新等，2002；曹慧等，2001；王伟，1998）。超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、细胞色素C氧化酶（COX）、抗坏血酸过氧化物酶（APX）和过氧化物酶（POD）是植物细胞内清除活性氧的重要保护酶，
This paper studied the effects of NO donor sodium nltroprusside （SNP） on improving walnut（ Juglans regia） drought resistance. The one-year-old grafting walnut plants were treated by SNP of 0,250,500,1 000μmol·L^-1 . The results showed that SNP treatment was able to alleviate the rise of membrane permeability and accelerate the accumulation of proline in walnut leaves under drought stress. After SNP treatment, both SOD activity and CAT activity increased. After recovering growth, the membrane permeability and MDA content of plants treated with SNP were significantly lower than those of grafting plants supplied with normal water, while the proline content was higher than that of grafting plants supplied with normal water. Both SOD activity and CAT activity were higher than those of grafting plants in drought control and similar to those supplied with normal water. This indicated that the SNP had a function of protecting walnut plants from being harmed by drought stress. In particular, the effect of 500 μmol·L^-1 SNP was more significant, 250μmol·L^-1 SNP and 1 000 μmol·L^-1 SNP followed.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2007年第10期122-126,共5页
Scientia Silvae Sinicae
基金
山东省教育厅项目(32282)
关键词
核桃
一氧化氮(NO)
干旱胁迫
保护酶
膜透性
walnut （ Juglans regia ）
nitric oxide （NO）
drought stress
protective enzymes
membrane permeability
