农业环境科学学报2009，Vol.28Issue(10)：2029-2034,6.
姜花在Cu胁迫下的耐性机理研究
Tolerance Mechanism of Hedychium coronarium Under Copper Stress
摘要
Abstract
Uptake and accumulation of copper in Hedychium coronarium(HC), the subcellular distribution of copper in leaf and chemical form of copper in plants under copper stress were investigated in a pot culture of simulated wetland. The results showed that the accumulation of copper in HC increased with the increase of the concentration of copper. When the concentration of copper was less than 150 mg·kg~(-1), the accumulation of copper in the plant was found in the order of root>leave>stem. While it was in the order of leave>root>stem when the concen-tration of copper was no less than 200 mg·kg~(-1). In all treatments, the copper in leaf was mainly on cell wall and in soluble fraction, while rela-tively lower in cell organelle. The copper in the root was predominated with Ethanol-and water-extractable forms, while NaCl-extractable form was dominant in the stem. Whereas NaCl-, HAC- and HCl-extractable forms in the leaf, which were less active, were dominant. In ad-dition, HC had certain concentrating capability, yet the ability was not strong .When the concentration of copper was no less than 400 mg·kg~(-1), the plants suffered from physiological hurt and death quickly, which showed that HC was not satisfied with the standard of copper hyper-ac-cumulation plant. It came to the conclusions that HC had certain tolerance, distributing selectivity and concentrating capability under copper stress, use of which to remedy copper -polluted wetland would relieve the pressure from copper pollution.关键词
铜胁迫/积累/分布/化学形态/富集能力Key words
copper stress/ accumulation/ distribution/ chemical form/ concentrating capability分类
农业科技引用本文复制引用
叶红,袁野,李远伟,阳路芳,吴晓莉,肖德林,邓仕槐..姜花在Cu胁迫下的耐性机理研究[J].农业环境科学学报,2009,28(10):2029-2034,6.基金项目
四川省教育厅科研项目(072A083) （072A083）
四川农业大学青年科技创新基金(2006A057) （2006A057）
四川公益性重大项目(2007NGY06) （2007NGY06）
