《植物生理学报》 2009, 45(3): 229-232

SNP 处理的辣椒幼苗对Cd²⁺ 胁迫的生理响应

陈世军¹, 张明生^2,*, 韦美玉¹

1 黔南民族师范学院生命科学系, 贵州都匀558000; 2 贵州大学生命科学学院, 贵阳550025

通信作者：张明生；E-mail: mszhang@gzu.edu.cn；Tel: 0851-3856374

摘　要：

采用溶液培养方法研究外源NO供体硝普钠(SNP)对Cd2+胁迫下辣椒幼苗生长和生理特性影响的结果表明: 75 μmol·L-1SNP 能在一定程度上缓解较高浓度Cd2+ 对辣椒幼苗生长、叶中Chl a 和Chl b含量以及根系活性的抑制作用, 降低丙二醛(MDA)含量, 增强超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)的活性。

关键词：辣椒; 幼苗; 硝普钠; 镉胁迫; 生理响应

收稿：2008-10-09   修定：2008-12-30

资助：贵州省年度攻关项目(2003NGY006)、黔南民族师范学院项目(2008Y024)和贵州大学实践教学改革研究建设项目。

Physiological Response of Capsicum frutescens L. var. longum Bailey Seedlingwith SNP to Cd²⁺ Stress

CHEN Shi-Jun¹, ZHANG Ming-Sheng^2,*, WEI Mei-Yu¹

¹Department of Life Sciences, Qiannan National Normal College, Duyun, Guizhou 558000, China; ²School of Life Sciences, Guizhou University, Guiyang 550025, China

Corresponding author: ZHANG Ming-Sheng; E-mail: mszhang@gzu.edu.cn; Tel: 0851-3856374

Abstract:

Effects of sodium nitroprusside (SNP, an exogenous nitric oxide donor) on seedling growth and physiological characteristics of Capsicum frutescens under Cd²⁺ stress were studied by solution culture. The results showed that the inhibition of Cd²⁺ to seedling growth, chlorophyll contents in leaves and root activity were alleviated by 75 µmol·L^-1 SNP in Capsicum frutescens seedling. And MDA content decreased, the activities of SOD, CAT and POD in plant were enhanced.

Key words: Capsicum frutescens; seedling; sodium nitroprusside; Cd²⁺ stress; physiological response