镉胁迫对不同小麦品种幼苗生长以及Cd^(2+)、Zn^(2+)、Mn^(2+)吸收和积累的影响  

Effects of Cd^(2+) Stress on the Seedling Growth,Cd^(2+),Zn^(2+) and Mn^(2+) Uptake of Different Wheat Cultivars

作　　者：朱志勇[1] 郝玉芬[2] 吴金芝[1] 黄明[1] 刘英杰[1] 李友军[1] 

机构地区：[1]河南科技大学农学院,河南洛阳471003 [2]山西农业大学文理学院,山西太谷030801

出　　处：《水土保持学报》2011年第2期209-213,共5页Journal of Soil and Water Conservation

基　　金：国家科技部<国家粮食丰产科技工程>项目资助(2004BA520A-06)

摘　　要：以洛旱6号、豫麦25、豫麦18、豫农949、新麦21及许农5号为试验材料,通过营养液培养法,研究了镉胁迫对其幼苗生物量积累以及Cd2+、Zn2+与Mn2+吸收的影响。结果表明,与正常生长小麦相比,低Cd2+(≤30μmol/L)浓度下,除许农5号地上部生物量有所下降外,其余品种的地上部和地下部生物量均呈上升趋势。中、高Cd2+(≥60μmol/L)浓度下,所有品种的生物量呈下降趋势,所有小麦品种体内Cd2+的含量均随着Cd2+处理浓度的增加而不断增加,而且,根系内Cd2+的含量均明显高于地上部。随着Cd2+处理浓度的增加,所有小麦品种地上部Zn2+的含量均不断增加,地下部Zn2+含量的变化品种间存在差异。地上、地下部Mn2+的含量则随处理浓度增加而不断降低。In a hydroponic experiment,six wheat cultivars（Luohan 6,Yumai 25,Yumai 18,Yunong 949,Xinmai 21 and Xunong 5） were used to study the effects of cadmium（Cd2＋） stress on their seedling growth,Cd2＋,Zn2＋ and Mn2＋ absorption.The results indicated that,comparing with the wheat under non-Cd2＋ stress,dry biomass of most wheat cultivars were increased under low Cd2＋（≤30 μmol/L） stress,however,dry biomass of all cultivars was decreased under high Cd2＋（≥60 μmol/L） stress.The contents of Cd2＋ in all wheat cultivars was increasing along with the increasing Cd2＋ concentration,and,the contents of Cd2＋ in root were higher than in shoot;the contents of Zn2＋ in shoot of all cultivars were also increasing along with the increase of Cd2＋ concentration,while the contents of Zn2＋ in root existed significant difference among cultivars when cadmium stress was aggravating.The contents of Mn2＋ in shoot and root were decreasing with the increase of Cd2＋ concentration.

关 键 词：小麦 镉胁迫 生物量 Cd2+ Zn2+ Mn2+ 

分 类 号：X56[环境科学与工程—环境工程] S512.1[农业科学—作物学]