Physiological Functions of Nitric Ozide in Sedum Alfredii Hance under Complez Heavy Metals Stress
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 (O2-, H2O2, ·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.
nitric ozide Cd/Zn/Pb complez contaminations phytoremediation Sedum Alfredii Hance reactive ozygen species
Xiao-ling Zhang Youqiong Cai Qiao Yang Wuzhong Ni Yunhua Hui Huijuan Yu
East China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences (CAFS),Shanghai,Chin Department of Biochemistry and Molecular Biology,Second Military Medical University,Shanghai,China College of Environmental and Resource Sciences,Zhejiang Univerisity,Hangzhou,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）