标题：Comparative study of root growth and sucrose-cleaving enzymes in metallicolous and non-metallicolous populations of Rumex dentatus under copper stress作者：Cai, Shen-Wen; Huang, Wu-Xing; Xiong, Zhi-Ting; Ye, Feng-Ya; Ren, Cong;Xu, Zhong-Rui; Liu, Chen; Deng, Song-Qiang; Zhao, Jing

来源出版物：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 卷：98页：95-102 DOI：10.1016/j.ecoenv.2013.09.017出版年：DEC 1 2013

摘要：Sucrose metabolism in roots of metallophytes is very important for root growth and maintenance of heavy metal tolerance. However, rare researches have been carried out on this topic so far. We tested here a hypothesis that roots of copper-tolerant plants should manifest higher activities of sucrose-cleaving enzymes than non-tolerant plants for maintaining root growth under Cu stress. Plants of two contrasting populations of metallophyte Rumex dentatus, one from an ancient Cu mine (MP) and the other from a non-mine site (NMP), were treated with Cu in controlled experiments. Cu treatment resulted in a higher root biomass and root/shoot biomass ratio in MP compared to NMP. More complicated root system architecture was showed in MP under Cu stress. Activities and transcript levels of acid invertase as well as contents of sucrose and reducing sugar in MP were elevated under Cu treatment, while activities of neutral/alkaline invertase and sucrose synthase showed no significant differences between two populations. The results indicate important roles of acid invertase in governing root growth under Cu stress.

入藏号：WOS:000326989200014

文献类型：Article

语种：Enlish

作者关键词：Rumex dentatus, Root growth, Acid invertase, Copper, Gene transcription

扩展关键词：CELL-WALL INVERTASE; PLANT DEVELOPMENT; ELSHOLTZIA-HAICHOWENSIS; ECOPHYSIOLOGICAL RESPONSES; THLASPI-CAERULESCENS; SYSTEM ARCHITECTURE; VACUOLAR INVERTASE; HYDROGEN-PEROXIDE; CU STRESS; TOLERANCE

通讯作者地址：Xiong, Zhi-Ting; 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, Shen-Wen; Huang, Wu-Xing; Xiong, Zhi-Ting; Ye, Feng-Ya; Ren, Cong; Xu, Zhong-Rui; Liu, Chen; Deng, Song-Qiang; Zhao, Jing] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.

研究方向：Environmental Sciences & Ecology; Toxicology

ISSN：0147-6513