[1]马引利,闫桂琴,李瑾,等.干旱胁迫条件下外源NO对翅果油树幼苗生理生化特征的影响[J].西北林学院学报,2011,26(03):30-35.
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干旱胁迫条件下外源NO对翅果油树幼苗生理生化特征的影响()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第26卷
期数:
2011年03期
页码:
30-35
栏目:
森林生物学
出版日期:
2011-05-02

文章信息/Info

作者:
马引利;闫桂琴;李瑾;张媛华;
山西师范大学生命科学学院;渭南师范学院环境与生命科学系;
关键词:
翅果油树; 水分胁迫; 一氧化氮; 氧化伤害; 保护酶
文献标志码:
A
摘要:
研究了NO供体硝普钠(Sodiumnitroprusside,SNP)预处理和PEG-6000渗透液处理对水分胁迫下翅果油树幼苗叶片相对含水量、叶绿素含量、净光合速率、膜脂过氧化和保护酶活性的影响。结果表明:外源NO能提高翅果油树幼苗叶片的相对含水量,缓解水分胁迫下叶片的水分丢失,提高其叶绿素含量;低浓度外源NO(0.1、0.2、0.4、0.6 mmol.L-1SNP)能促进叶片的光合速率,高浓度(0.8、1.0 mmol.L-1SNP)则明显抑制光合速率。外源NO使各处理组叶片丙二醛含量和相对电导率均降低;随着SNP浓度的升高,各处理组POD活性呈逐渐上升趋势,而CAT活性先上升后下降,且均高于对照。外源NO可通过诱导叶片POD和CAT活性的升高来延缓活性氧的积累,从而减轻水分胁迫对翅果油树的伤害,增强树木的耐旱能力。

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备注/Memo

备注/Memo:
国家自然科学基金项目(200430470296);;
更新日期/Last Update: 2011-05-20