文献类型：期刊文献

英文题名：Responses and acclimation of Chinese cork oak (Quercus variabilis Bl.) to metal stress: the inducible antimony tolerance in oak trees

作者：Zhao, Xiulian[1,2,3] Zheng, Lingyu[1,2] Xia, Xinli[3] Yin, Weilun[3] Lei, Jingpin[1] Shi, Shengqing[2] Shi, Xiang[1] Li, Huiqing[1] Li, Qinghe[1] Wei, Yuan[1] Chang, Ermei[1] Jiang, Zeping[1] Liu, Jianfeng[1]

第一作者：赵秀莲;Zhao, Xiulian

通信作者：Liu, JF[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing, Peoples R China;[2]Chinese Acad Forestry, State Forestry Adm, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Beijing, Peoples R China;[3]Beijing Forestry Univ, Coll Biol, Natl Engn Lab Tree Breeding, Beijing, Peoples R China

年份：2015

卷号：22

期号：15

起止页码：11456-11466

外文期刊名：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000358330800024)】；

基金：This work was supported by the Project from Ministry of Science and Technology, China (2012BAC09B03 and 2011BAD38B0103) and Beijing Natural Science Foundation (No.8152032).

语种：英文

外文关键词：Heavy metal pollution; Phytoremediation; Tolerance; Chlorophyll fluorescence; Acclimation

摘要：Antimony (Sb) pollution has become a pressing environmental problem in recent years. Trees have been proven to have great potential for the feasible phytomanagement; however, little is known about Sb retention and tolerance in trees. The Chinese cork oak (Quercus variabilis Bl.) is known to be capable of growth in soils containing high concentrations of Sb. This study explored in detail the retention and acclimation of Q. variabilis under moderate and high external Sb levels. Results revealed that Q. variabilis could tolerate and accumulate high Sb (1623.39 mg kg(-1) DW) in roots. Dynamics of Sb retention in leaves, stems, and roots of Q. variabilis were different. Leaf Sb remained at a certain level for several weeks, while in roots and stems, Sb concentrations continued to increase. Sb damaged tree's PSII reaction cores but elicited defense mechanism at the donor side of PSII. It affected the electron transport flow after Q(A)(-) more strongly than the oxygen-evolving complex and light-harvesting pigment-protein complex II. Sb also decreased leaf chlorophyll concentrations and therefore inhibited plant growth. During acclimation to Sb toxicity, Sb concentrations in leaves, stems, and roots decreased, with photosynthetic activity and pigments recovering to normal levels by the end of the experiment. These findings suggest that Sb tolerance in Q. variabilis is inducible. Acclimation seems to be related to homeostasis of Sb in plants. Results of this study can provide useful information for trees breeding and selection of Sb phytomanagement strategies, exploiting the established ability of Q. variabilis to transport, delocalize in the leaves, and tolerate Sb pollutions.