文献类型：期刊文献

英文题名：Physiological and biochemical responses of Salix integra Thunb. under copper stress as affected by soil flooding

作者：Cao, Yini[1] Ma, Chuanxin[2,3] Chen, Guangcai[1] Zhang, Jianfeng[1] Xing, Baoshan[2]

第一作者：Cao, Yini

通信作者：Chen, GC[1]|[a000551c9abd7c3960d59]陈光才;

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Zhejiang, Peoples R China;[2]Univ Massachusetts, Stockbridge Sch Agr, Amherst, MA 01003 USA;[3]Connecticut Agr Expt Stn, Dept Analyt Chem, New Haven, CT 06504 USA

年份：2017

卷号：225

起止页码：644-653

外文期刊名：ENVIRONMENTAL POLLUTION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000401679200070)】；

基金：The work was supported by the National Natural Science Foundation of China (31470619), Joint Project of Zhejiang Province and Chinese Academy of Forestry (2013SY02), and Research Institute of Subtropical Forestry, Chinese Academy of Forestry (RISF2013001).

语种：英文

外文关键词：Willow; Copper; Flooding; Oxidative stress; Nutrients; Phytoremediation

摘要：To explore the joint effect of copper (Cu) and flooding on Salix integra Thunb. (S. integra); the physiological and biochemical parameters of the seedlings grown in Cu amended soil (50, 150, 450 mg kg(-1)) with or without the flooding for 60 days were evaluated. The results suggested that the flooding significantly inhibited the root growth in terms of root length and root tips. The Cu exposures of 50 and 150 mg kg(-1) notably enhanced the root growth as compared to the control. Majority of Cu was accumulated in S. integra roots, while flooding significantly reduced the Cu content, except the 150 mg kg(-1) Cu treatment, but the iron (Fe) and manganese (Mn) content on the root surface were both markedly increased relative to non-flooded control. The malonaldehyde (MDA) and glutathione (GSH) contents in leaves showed a dose-response upon Cu exposure. Soil flooding enhanced the GSH level, which displayed 4.50-49.59% increases compared to its respective non-flooded treatment, while no difference was evident on MDA contents between the flooding and the non-flooded treatments. Both superoxide dismutase (SOD) and peroxidase (POD) activities were boosted while the catalase (CAT) was suppressed with increasing Cu exposure dose, and soil flooding reduced the POD and CAT activities. The elevated Cu level caused the evident increases of root calcium (Ca), potassium (IC), and sulfur (S) concentrations and decreases of root phosphorus (P), sodium (Na), and zinc (Zn) concentrations. Soil flooding increased the concentrations of Fe, 5, Na, Ca, and magnesium (Mg) in S. integra root. Taken together, our results suggested S, integra has high tolerance to the joint stress from Cu and flooding. (C) 2017 Elsevier Ltd. All rights reserved.