文献类型： 会议论文

第一作者： Xiao-ling Zhang

作者： Xiao-ling Zhang ¹ ; Qiao Yang ² ; Yunhua Hui ¹ ; Youqiong Cai ¹ ; Wuzhong Ni ³ ; Huijuan Yu ¹ ;

作者机构： 1.East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences (CAFS)

2.Department of Biochemistry and Molecular Biology, Second Military Medical University

3.College of Environmental and Resource Sciences, Zhejiang Univerisity

关键词： Nitric oxide;Cd/Zn/Pb complex contaminations;Phytoremediation;Sedum Alfredii Hance;Reactive oxygen species

会议名称： iCBBE 2009

主办单位：

页码： 4511-4514

摘要： Heavy metals contamination is a major environmental issue, and phytoremediation is a promising, environmentally friendly alternative to conventional cleanup techniques for heavy metal contaminated sites. This paper is intended to explore the physiological functions of nitric oxide (NO) in the signaling pathways as well as defense responses in Sedum Alfredii Hance, a new zinc (Zn) promising hyperaccumulating plant species for the phytoremediation exposured to Cd/Zn/Pb complex contaminations. The induced NO and free radicals ((O_2)~(·-), H_2O_2, ·OH and malondialdehyde) were quantitatively determined and the functions of NO, reactive oxygen species (ROS) and sacylic acid (SA) in the regulation of the redox signaling against oxidative stress were also discussed. The hypothetical mode of NO effecting plant defense responses was proposed The results indicated that NO as the versatile and powerful effector of redox-regulated signaling, can acts synergistically with ROS to defend the plant against oxidative attack caused by Cd/Zn/Pb complex contaminations by activating elaborate defenses.

分类号： G202-53