外源水杨酸对镉胁迫下两种菊芋品系幼苗的缓解作用

被引：8

作者：

陈良 ^{[1
]}

隆小华 ^{[1
]}

晋利 ^{[2
]}

金善钊 ^{[1
]}

郑晓涛 ^{[1
]}

刘兆普 ^{[1
]}

机构：

[1] 南京农业大学资源与环境科学学院江苏省海洋生物学重点实验室

[2] 中国环境管理干部学院环境工程系

来源：

生态学杂志 | 2011年 / 30卷 / 10期

关键词：

镉胁迫; 水杨酸; 菊芋; 光合特性; 镉吸收转运;

D O I：

10.13292/j.1000-4890.2011.0286

中图分类号：

S632.9 [其他];

学科分类号：

090202 ;

摘要：

研究了不同浓度Cd(0、50、100μmol·L-1)及水杨酸(SA)(0、10、100和1000μmol·L-1)处理下2种菊芋(南芋5号和南芋2号)的生物量变化情况,测定了叶片色素(叶绿素和类胡萝卜素)含量及光合作用参数,并比较了2种菊芋对Cd的吸收转运差异性。结果表明:外源SA处理不同程度地缓解了Cd对菊芋幼苗生长的毒害效应,提高了色素含量,改善了光合作用参数,增大了Cd的生物富集系数(BCF)和转运系数(TF),与此同时减少了植株不同器官对Cd的累积量,但最佳SA浓度因品种及器官不同而有所区别。研究表明,适当浓度的SA处理可以有效增强2种菊芋对Cd的耐性。

引用

页码：2155 / 2164

页数：10

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