不同狼尾草幼苗对镉胁迫的响应

doi:10.11733/j.issn.1007-0435.2015.01.021

草地学报 ›› 2015, Vol. 23 ›› Issue (1): 130-136.DOI: 10.11733/j.issn.1007-0435.2015.01.021

不同狼尾草幼苗对镉胁迫的响应

王瑜, 袁庆华, 苗丽宏

中国农业科学院北京畜牧兽医研究所, 北京 100193

收稿日期:2014-03-24 修回日期:2014-07-04 出版日期:2015-02-15 发布日期:2015-01-31
通讯作者: 袁庆华
作者简介:王瑜(1981-),女,山东威海人,助理研究员,博士,研究方向为草地植保与品种资源,E-mail:yuwang-99@hotmail.com
基金资助:
中央级公益性科研院所基本科研业务费专项(2012CJ-8);十二五国家科技支撑计划课题(2011BAD17B01)资助

Responses of Four Different Pennisetum alopecuroides Germplasms to Cadmium Stress

WANG Yu, YUAN Qing-hua, MIAO Li-hong

Institute of animal sciences, CAAS, Beijing 100193, China

Received:2014-03-24 Revised:2014-07-04 Online:2015-02-15 Published:2015-01-31

摘要/Abstract

摘要：

采用温室盆栽试验,对4份野生狼尾草(Pennisetum alopecuroides)材料进行不同浓度镉(Cd)(0,10,20,50,100,200 mg·kg^-1)胁迫处理,通过对苗期生长指标、抗氧化酶(SOD,POD,CAT)活性、地上部与根的Cd²⁺积累量等指标的测定与分析,对4份材料的耐Cd性与Cd富集能力进行研究.结果表明:随着Cd²⁺浓度的升高,4份材料的存活率呈现逐渐降低的趋势,而株高、分蘖数、地上与地下生物量与对照相比无显著变化,SOD与CAT活性均呈现逐渐升高的趋势,POD活性则呈现无规律的波动性变化,材料P4耐Cd性最强.当Cd²⁺浓度为200 mg·kg^-1时,材料P1对Cd的吸收富集能力最强,在Cd污染土壤的修复上具有较好利用前景.

关键词: 镉, 狼尾草, 生长, 抗氧化酶活性, Cd积累量

Abstract:

Four wild Pennisetum alopecuroides germplasms were treated with different cadmium concentrations (0, 10, 20, 50, 100, 200 mg·kg^-1) at seedling stage in greenhouse. The antioxidant enzyme activities, Cd²⁺ accumulation, and cadmium-tolerance of the four germplasms were analyzed by the evaluation of growth parameters. The results showed that the survival rates of the four germplasms were gradually reduced with the increase of Cd²⁺ concentration. However, the plant heights, tillering numbers, shoot and root biomasses of tested germplasms had no significant difference compared to controls. The material of P4 treatment was more tolerant to Cd toxicity than others. The SOD and CAT activities of the four germplasms increased and the POD activities changed irregularly with the increase of Cd²⁺ concentration. The material of P1 had the strongest cadmium absorption and accumulation ability compared with others when Cd²⁺ concentration was 200 mg·kg^-1, and it will have a good prospect in the restoration of cadmium-contaminated soil.

Key words: Cd, Pennisetum alopecuroides L., Growth, Antioxidases activity, Cd accumulation

中图分类号:

Q945.78

王瑜, 袁庆华, 苗丽宏. 不同狼尾草幼苗对镉胁迫的响应[J]. 草地学报, 2015, 23(1): 130-136.

WANG Yu, YUAN Qing-hua, MIAO Li-hong. Responses of Four Different Pennisetum alopecuroides Germplasms to Cadmium Stress[J]. Acta Agrestia Sinica, 2015, 23(1): 130-136.

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不同狼尾草幼苗对镉胁迫的响应

Responses of Four Different Pennisetum alopecuroides Germplasms to Cadmium Stress

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