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茄子苗对镉积累和耐性的品种间差异

ISSN号：1673-5897
期刊名称：生态毒理学报
时间：2013
页码：413-418
分类：X171.5[环境科学与工程—环境科学]
作者机构：[1]沈阳建筑大学市政与环境工程学院,沈阳110168, [2]中国科学院沈阳应用生态研究所污染生态与环境工程重点实验室,沈阳110016, [3]中国科学院大学,北京100094
相关基金：国家自然科学基金项目（31070455,31270540,40971184,40930739）;辽宁省自然科学基金项目（201102224）;“十二五”国家科技支撑计划课题（2012BAC17B04）;“863”计划课题（2012AA06A202）
相关项目：超富集植物龙葵对镉富集的主要机理

关键词：茄子, 镉, 积累, 品种差异, eggplant （Solarium melongena L.）, cadmium, accumulation, cultivar difference

中文摘要：

通过盆栽实验方法研究了13种茄子幼苗对镉（Cd）积累与耐性的品种间差异。结果表明，这些茄子幼苗根及地上部Cd含量均随土壤中外加Cd的量的增加而提高。品种间存在着显著差异（P〈0．05），其中Cd含量最高品种根部和地上部的Cd含量分别为Cd含量最低品种的2．1、24倍（2mg·kg-1Cd处理组）和1.5、1．6倍（4mg·kg-1Cd处理组）。不同品种幼苗对Cd的富集系数均大于1，表现出较强的富集能力。但转运系数均小于1，Cd从根部向地上部转移能力较弱，大多数品种间差异不大。当Cd添加量为2mg·kg-1时，只有绿龙长茄地上部生物量显著下降（P〈0．05）。当Cd添加量提高到4mg·kg-1时，6个品种地上部生物量显著下降（P〈0．05），这些品种对Cd的耐性较弱。综合评价，辽茄三号对Cd积累的含量最低，富集系数和转移系数也较低，对Cd具有较强的耐性，具有Cd低积累特征。

英文摘要：

Pot culture experiment was used to compare the differences of cadmium （Cd） accumulation and ance among 13 eggplant cultivar seedlings. Results showed that Cd contents in the roots and shoots plants enhanced with the increasement of Cd contents in soil. There was a significant difference （P 〈0.05） concentration among different eggplant cultivars. Cd contents in roots and shoots of the cultivar with the toler- of all in Cd high-est Cd content were 2.1 and 2.4 times in treatment T1 （2 mg·kg-1 Cd）, and 15 and 1.6 times in treatment T2 （4 mg·kg-1 Cd） of the one with the cowest Cd content. The enrichment factors of all plants were all higher than 1, in- dicating the very strong accumulation capacity of eggplant. However, the translocation factors of all eultivars were lower than I. The differences oftransloeation factors among most cultivars did not show significant difference （P 〈0.05）, expressing low translation capacity of Cd from root to shoot. Under the condition of 2 mg.kg 1 Cd added in soil, only the shoot biomass of Lvlongchangqie significantly decreased （P 〈0.05） compared to the control. When 4 mg.kg-l Cd was added in soil, the shoot biomasses of 6 cultivars significantly decreased （P 〈 0.05）, indicating their weak tolerance to Cd. Cd concentrations in the roots and shoots of Liaoqie 3 were the low- est among different eggplant cultivars. Its enrichment factor and translocation factor were lower either. Accordingly, Liaoqie 3 showed strong tolerance to Cd and low Cd accumulation characteristics.

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