镉胁迫下增施氮对杨树生长和光合特性的影响

被引：17

作者：

张帆

万雪琴

王长亮

丁云海

机构：

[1] 不详

[2] 四川农业大学林学院

[3] 不详

来源：

四川农业大学学报 | 2011年 / 03期

关键词：

杨树; 镉胁迫; 氮; 生长; 光合特性;

D O I：

暂无

中图分类号：

S792.11 [杨];

学科分类号：

摘要：

为探讨植物对重金属镉的解毒机制,本实验以"欧美107杨"扦插苗为材料,以CdCl2和Cd(NO3)2为镉源,研究了在镉处理下施加氮肥(NH4HCO3)对其的生长和光合特性的影响。结果表明,在硝酸镉或氯化镉胁迫下,施用碳酸氢铵能缓解重金属镉对杨树植株的危害,其生长,叶绿素含量和光合速率显著高于对照。单独的氯化镉胁迫处理抑制杨树生长,杨树叶色黄化,叶绿素含量和光合速率降低。由此说明,氮在植物对重金属镉的解毒中起到重要作用,增施氮肥可缓解镉对植物的毒害,提高叶绿素含量和光合速率。

引用

页码：317 / 321

页数：5

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