Effects of Cadmium Stress on the Growth,Cadmium Accumulation and Distribution of Three Stylosanthes spp. Varieties

doi:10.11733/j.issn.1007-0435.2011.01.017

›› 2011, Vol. 19 ›› Issue (1): 97-101.DOI: 10.11733/j.issn.1007-0435.2011.01.017

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Effects of Cadmium Stress on the Growth,Cadmium Accumulation and Distribution of Three Stylosanthes spp. Varieties

HUANG Geng-lei^1,2, HUANG Gong-fen¹, LIU Guo-dao¹, HUAN Heng-fu¹

1. Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences/Key Laboratory of Tropical Crops Germplasm Resources Utilization, Ministry of Agriculture, Danzhou, Hainan Province 571737, China;
2. College of Agronomy, Hainan University, Danzhou, Hainan Province 571737, China

Received:2010-11-02 Revised:2010-12-24 Online:2011-02-15 Published:2011-02-15

镉胁迫对3种柱花草生长及植株镉积累和分配的影响

黄耿磊^1,2, 黄冬芬¹, 刘国道¹, 郇恒福¹

1. 中国热带农业科学院热带作物品种资源研究所/农业部热带作物种质资源利用重点开放实验室, 海南, 儋州, 571737;
2. 海南大学农学院, 海南, 儋州, 571737

通讯作者: 刘国道,E-mail:liuguodao2008@163.com;郇恒福,E-mail:hengfu.huan@163.com
作者简介:黄耿磊(1984- ),男,海南保亭人,硕士研究生,研究方向为热带牧草栽培与耕作,E-mail:huanggenglei@163.com;
基金资助:
973计划项目(2007CB108903);现代农业产业技术体系建设专项资金;中央级公益性科研院所基本科研业务费专项资金(PZS038)资助

Abstract

Abstract: Effects of cadmium stress on the growth,the contents of Cd²⁺ and distribution of three Stylosanthes spp.varieties were investigated under treatments with different Cd²⁺ concentrations.Results showed that the growth of Stylosanthes spp.was restrained with Cd²⁺ concentration.Shoot height,branch number,aboveground and underground biomass of Stylosanthes scabra cv.Seca was most influenced with Stylosanthes guianensis.TPRC2001-1 and Stylosanthes guianensis cv.Reyan 2 least influenced.The Cd²⁺ content in both aboveground and underground parts of three varieties significantly increased under the stress of Cd.The Cd²⁺ content of Stylosanthes guianensis.TPRC2001-1 was the highest among three varieties.The Cd bioconcentration factor of the Stylosanthes spp.aboveground decreased with exogenous Cd²⁺ concentration increasing.Stylosanthes spp.was more susceptible to accumulate Cd²⁺ when the soil Cd²⁺ concentration was lower(≤1 mg·kg^-1).Transfer coefficients were initially increased then decreased.

Key words: Cadmium stress, Stylosanthes spp., Bioconcentration factor, Transfer coefficient

摘要： 利用不同浓度镉离子(Cd²⁺)溶液对3个柱花草(Stylosanthes spp.)品种进行不同程度的胁迫处理,以研究Cd²⁺胁迫对柱花草生长、镉积累及其分配的影响。结果表明:随着Cd²⁺浓度的增加,3种柱花草生长均受到抑制,Cd²⁺胁迫对西卡柱花草(Stylosanthes scabra cv.Seca)株高、分枝数、地上部和地下部生物量影响最大,其次是TPRC2001-1柱花草(Stylosanthes guianensis.TPRC2001-1),而热研2号柱花草(Stylosanthes guianensis cv.Reyan2)影响最小;在Cd²⁺胁迫下3种柱花草地上部和地下部Cd²⁺含量均显著增加,TPRC2001-1柱花草体内含Cd²⁺量较热研2号柱花草和西卡柱花草大;地上部富集系数随Cd²⁺浓度增加呈下降趋势,且在低Cd²⁺浓度(≤1 mg·kg^-1)下更易富集Cd²⁺;Cd²⁺转运系数呈现先上升后下降。

关键词: 镉胁迫, 柱花草, 富集系数, 转运系数

CLC Number:

HUANG Geng-lei, HUANG Gong-fen, LIU Guo-dao, HUAN Heng-fu. Effects of Cadmium Stress on the Growth,Cadmium Accumulation and Distribution of Three Stylosanthes spp. Varieties[J]. , 2011, 19(1): 97-101.

黄耿磊, 黄冬芬, 刘国道, 郇恒福. 镉胁迫对3种柱花草生长及植株镉积累和分配的影响[J]. , 2011, 19(1): 97-101.

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Effects of Cadmium Stress on the Growth,Cadmium Accumulation and Distribution of Three Stylosanthes spp. Varieties

镉胁迫对3种柱花草生长及植株镉积累和分配的影响

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