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草地学报  2015 

不同狼尾草幼苗对镉胁迫的响应

DOI: 10.11733/j.issn.1007-0435.2015.01.021, PP. 130-136

Keywords: ,狼尾草,生长,抗氧化酶活性,Cd积累量

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Abstract:

采用温室盆栽试验,对4份野生狼尾草(Pennisetumalopecuroides)材料进行不同浓度镉(Cd)(0,10,20,50,100,200mg·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200mg·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.

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