标题：Differential responses of root growth, acid invertase activity and transcript level to copper stress in two contrasting populations of Elsholtzia haichowensis作者：Cai, Shenwen; Xiong, Zhiting; Li, Ling; Li, Minjing; Zhang, Luan; Liu,

Chen; Xu, Zhongrui

来源出版物：ECOTOXICOLOGY卷：23 期：1 页：76-91 DOI：10.1007/s10646-013-1153-y出版年：JAN 2014

摘要：The present study aimed to test a hypothesis that acid invertases in root of metallophytes might play important roles in root growth under heavy metal stress. Plants of two contrasting populations, one from an ancient Cu mine (MP) and the other from a non-contaminated site (NMP), of metallophyte Elsholtzia haichowensis were treated with Cu in controlled experiments. The results showed that MP was Cu tolerant under 10 mu M Cu2+ treatment. Cu treatment resulted in a higher root/shoot biomass ratio in MP compared to NMP. Scaling exponent in root/shoot allometric function in MP was lower than NMP. More complicated root architecture was observed in MP under Cu stress. Four full-length cDNAs (EhNcwINV, EhCcwINV, EhNvINV and EhCvINV) encoding cell wall and vacuolar invertases were cloned. Both of the transcript level and activity of the acid invertase in MP elevated under Cu treatment. There were positive correlations between root acid invertase transcript level, activity and root/shoot biomass ratio. The results indicated important roles of acid invertase in governing root growth under Cu stress. It also suggested that there was a possible interrelation between acid invertases and Cu tolerance mechanisms in MP of E. haichowensis.

入藏号：WOS:000329584300009

文献类型：Article

语种：English

作者关键词：Elsholtzia haichowensis, Root/shoot allometry, Root architecture, Acid invertase, Copper

扩展关键词：RUMEX-DENTATUS L.; THLASPI-CAERULESCENS; SYSTEM ARCHITECTURE; PLANT DEVELOPMENT; ECOPHYSIOLOGICAL RESPONSES; BIOMASS ALLOCATION; METAL TOLERANCE; CU STRESS; ACCUMULATION; MECHANISMS

通讯作者地址：Xiong, Zhiting; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

电子邮件地址：ztxiong@whu.edu.cn

地址：

[Cai, Shenwen; Xiong, Zhiting; Li, Ling; Zhang, Luan; Liu, Chen; Xu, Zhongrui] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

[Cai, Shenwen; Xiong, Zhiting; Li, Ling; Zhang, Luan; Liu, Chen; Xu, Zhongrui] Wuhan Univ, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430072, Hubei, Peoples R China.

[Li, Minjing] China Univ Geosci, Sch Environm Studies, Wuhan 430074, Hubei, Peoples R China.

研究方向：Environmental Sciences & Ecology; Toxicology

ISSN：0963-9292