Effects of Antimony Stress on Root Growth,Antimony Accumulation and Physiological Characteristics of Ramie(Boehmeria nivea(L.) Gaudich.)  

作　　者：Jiecheng HAN Yaxuan LIU Xingguo ZHAN Jingyao LUO Fulong YANG Jing ZHOU Guiyuan MENG 

机构地区：[1]College of Agriculture and Biotechnology,Hunan University of Humanities,Science and Technology,Loudi 417000,China

出　　处：《Agricultural Biotechnology》2023年第1期8-11,15,共5页农业生物技术（英文版）

基　　金：Supported by Hunan Provincial Postgraduate Education Innovation Project and Professional Ability Improvement Project (CX20211220);Scientific Research Project of Hunan Provincial Department of Education (20A278);Undergraduate Innovation and Entrepreneurship Training Program of Hunan Province (XJT[2021]197,No. 3705);School-level Postgraduate Innovation Experiment Project (24520012)。

摘　　要：[Objectives]This study was conducted to investigate the toxicity of heavy metal antimony(Sb) to ramie(Boehmeria nivea(L.) Gaudich.) and the tolerance response in ramie. [Methods] A pot experiment was conducted to study the effects of Sb stress on root growth and Sb accumulation and transport of the root system of cultivated ramie Zhongzhu No.1, as well as on the physiological characteristics of ramie leaves. [Results] The plant height and root dry weight and volume of Zhongzhu No.1 showed an effect of "promoting at low concentrations and inhibiting at high concentrations" with the increase of Sb concentration, and decreased significantly at the concentration of 4 000 mg/kg, but no obvious toxic growth symptoms were observed. The content of Sb in roots(289.7-508.6 mg/kg) and the root-shoot transfer factor(0.09-0.57) of Zhongzhu No.1 increased with the increase of soil Sb concentration, but the change of Sb bioconcentration factor in roots was opposite, indicating that high concentrations of Sb in soil could promote the absorption of Sb in roots and the transport of Sb to the aboveground part, but the Sb enrichment capacity of roots was relatively reduced with the increase of soil Sb. Sb stress had a certain impact on the physiological characteristics of ramie leaves. With the increase of Sb treatment concentration, MDA, POD and SOD showed a change trend of "first increasing and then decreasing", while CAT gradually increased, indicating that Sb stress caused changes in the physiological characteristics of ramie leaves, thereby affecting plant growth and development. [Conclusions] This study provides a theoretical basis for ecological restoration of ramie in mining areas.

关 键 词：ANTIMONY RAMIE Root growth Sb enrichment Physiological characteristics 

分 类 号：S563.1[农业科学—作物学]