镉胁迫对小麦生理特性的影响
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摘要
镉(Cd)由于其移动性强、毒性高、难降解而成为最为关注的重金属元素之一,因此,Cd的毒性效应已成为国内外研究的热点。研究结果表明,小麦生长指标与对照相比差异显著,且呈现明显的剂量-效应关系,根长降低幅度较大,Cd对于根的毒性作用较强,根对于污染胁迫响应较敏感。抗氧化酶活性显著性升高,这是Cd2+胁迫下小麦的一种防御机制,在一定程度上减轻了小麦受到的毒害作用。
Cadmium( Cd) has become one of the most important heavy metal elements because of its strong mobility,high toxicity and difficult degradation. Therefore,toxicity effect of Cd has become a hot research at home and abroad. The results showed that growth indexes were significantly different compared to the control,and there was a clear dose-response relationship between Cd pollution and toxicity. Among these indexes,root length changed by a big margin,indicating that it was more sensitive. Antioxidant enzyme activity increased significantly,which can alleviate the toxicity on wheat. It was a defense mechanism of wheat under Cd2 +stress.
Cadmium( Cd) has become one of the most important heavy metal elements because of its strong mobility,high toxicity and difficult degradation. Therefore,toxicity effect of Cd has become a hot research at home and abroad. The results showed that growth indexes were significantly different compared to the control,and there was a clear dose-response relationship between Cd pollution and toxicity. Among these indexes,root length changed by a big margin,indicating that it was more sensitive. Antioxidant enzyme activity increased significantly,which can alleviate the toxicity on wheat. It was a defense mechanism of wheat under Cd2 +stress.
引文
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[2]彭少邦,蔡乐,李泗清.土壤镉污染修复方法及生物修复研究进展[J].环境与发展,2014,26(3):86-90.
[3]尹素真,李光德,刘明明,等.DBP和Cd复合污染对油菜的毒性作用研究[J].水土保持学报,2015,29(2):294-298.
[4]芮海云,沈振国,张芬琴.土壤镉污染对箭箸豌豆生长、镉积累和营养物质吸收的影响[J].作物杂志,2017(6):104-108.
[5]肖春文,罗秀云,田云,等.重金属镉污染生物修复的研究进展[J].化学与生物工程,2013,30(8):1-4.
[6]Bolan N S,Makino T,Kunhikrishnan A,et al.Cadmium contamination and its risk management in rice ecosystems[J].Advances in Agronomy,2013,119:183-273.
[7]胡博华,徐劼,段德超,等.镉胁迫下芹菜生理响应的傅里叶变换红外光谱研究[J].北方园艺,2015(15):11-16.