叶绿体
APX公司
黄瓜
抗氧化剂
化学
氧气
甜瓜
盐度
园艺
核化学
植物
生物化学
生物
超氧化物歧化酶
有机化学
基因
生态学
作者
Qiong-qiu Qian,Wen-San Zai,Zhujun Zhu,Jing-Quan Yu
出处
期刊:PubMed
日期:2006-02-01
卷期号:32 (1): 107-12
被引量:9
摘要
With K(2)SiO(4) (1.0 mmol/L) treatment, the effects of Si on the distribution of Na(+), K(+) to chloroplasts and antioxidant system of cucumber leaves under 50 mmol/L NaCl stress were studied. The results showed that there was a selective transport of K(+) into the chloroplasts so that Na(+) content of chloroplasts was lower under Si treatment (Table 1); H(2)O(2) and MDA contents in chloroplasts were significantly decreased (Fig.1), and the activities of SOD, APX, GR and DHAR were increased simultaneity (Fig.2), and AsA, GSH contents were also increased in chloroplasts of salt-stressed cucumber by additional Si treatment (Fig.3). It may be concluded that Si could decrease absorption of Na(+) and increase ability of active oxygen scavenging in chloroplasts, therefore the injury of chloroplast membrane under salinity stress in cucumber was alleviated.
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