文献类型：期刊文献

英文题名：Growth, physiological responses, and copper accumulation in seven willow species exposed to Cu-a hydroponic experiment

作者：Cao, Yini[1] Zhang, Ying[1,2] Ma, Chuanxin[3] Li, Haimei[2] Zhang, Jianfeng[1] Chen, Guangcai[1]

第一作者：Cao, Yini

通信作者：Chen, GC[1];Li, HM[2]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Qingdao Agr Univ, Coll Landscape Architecture & Forestry, Qingdao 266109, Peoples R China;[3]Connecticut Agr Expt Stn, Dept Analyt Chem, New Haven, CT 06504 USA

年份：2018

卷号：25

期号：20

起止页码：19875-19886

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;Scopus(收录号：2-s2.0-85046685634);WOS:【SCI-EXPANDED(收录号:WOS:000437395400058)】；

基金：The work was supported by the National Natural Science Foundation of China (31470619) and the Key Research and Development Program of Zhejiang Province, China (2018C03047).

语种：英文

外文关键词：Salix; Copper; Hydroponic screening; Physiological response; Phytostabilization

摘要：Selecting plant species, especially woody species, that can tolerate and accumulate high levels of heavy metals is crucial for the purpose of phytoremediation. In the present study, seven willow species/clones were evaluated for their variations in copper (Cu) tolerance, Cu accumulation, and their relative physiological responses, when exposed to different doses of Cu (control, 15, and 120 mu M) in a hydroponic system for 40 days. Upon Cu exposure, all tested willow species/clones (Salix, S.) remained relative normal growth, albeit with some visual evidence of Cu toxicity observed. Seven willow species remained relative high total biomass with tolerance index > 0.6 when being exposed to 120 mu M Cu, suggesting their high Cu tolerance. Exposure to 120 mu M Cu resulted in notable declines (16.3-76.1%) in photosynthesis in all willow species. Increases in the soluble sugar content and decreases in the soluble protein content in the leaves of five willow species (S. integra "Yizhibi", S. jiangsuensis "J172", S. matsudana 14, S. matsudana 25, S. matsudana 89) were found in the 120 mu M Cu treatment. The majority of Cu mainly accumulated in the roots, ranging from 1916 to 26,244 mg kg(-1) DW. Principal component analysis and membership function analysis suggested that S. matsudana 89 and S. matsudana 25 showed much higher biomass and accumulation ability than the other species. This suggests that these two willow clones could be used as potential candidates for the phytostabilization of Cu in contaminated soils.