盐及重金属胁迫对龟背竹生理抗性的影响

发布时间：2018-01-01 02:12

本文关键词：盐及重金属胁迫对龟背竹生理抗性的影响　出处：《江苏农业科学》2016年11期 　论文类型：期刊论文

【摘要】：通过盆栽试验法,研究土壤外源盐、重金属及其复合因素胁迫对龟背竹生理指标的影响。结果表明,不同处理组在20、40 d 2个处理时期,其叶片可溶性糖、可溶性蛋白含量随着处理周期的延长而下降,而游离脯氨酸、丙二醛含量上升。单因素或复合因素胁迫条件下,随着盐、重金属浓度的递增,可溶性糖、可溶性蛋白、游离脯氨酸、丙二醛含量基本上先增加后降低,与对照相比有不同程度上升。由结果可知,龟背竹在一定盐和重金属胁迫范围内可通过改变叶片渗透调节物质含量来适应由胁迫带来的代谢失衡和缺水对植株的伤害。研究结果可为植物生长代谢过程中适应和抵御盐与重金属污染的损伤机制提供理论依据。
[Abstract]:The effects of exogenous salt, heavy metals and their compound factors on physiological indexes of Phyllostachys japonicus were studied by pot experiment. The results showed that different treatments had two treatments at 20 ~ 40 days. The content of soluble sugar and soluble protein in leaves decreased with the extension of treatment cycle, while the contents of free proline and malondialdehyde increased. The content of soluble sugar, soluble protein, free proline and malondialdehyde increased at first and then decreased. In a certain range of salt and heavy metal stress, Phyllostachys japonicus can adapt to the metabolic imbalance caused by stress and the damage caused by water shortage by changing the content of osmotic regulators in leaves. The results of the study may be suitable for plant growth and metabolism. The damage mechanism of resisting salt and heavy metal pollution should provide theoretical basis.
【作者单位】：新乡学院生命科学技术学院;
【基金】：河南省基础与前沿技术研究(编号:142300410100) 河南省新乡市重点科技攻关计划(编号:ZG14035)
【分类号】：X503.23
【正文快照】： 重金属是造成环境污染的重要因素之一,其中铅(Pb)、镉(Cd)毒性特别强,危害较大,是环境污染理论研究及治理实践中备受关注的对象,同在5大污染毒物[Cd、汞(Hg)、砷(As)、铬(Cr)、Pb]之列[1-2]。随着我国人口的大幅度增长,采矿、冶炼和制造等工业的迅速发展,农用化学品的过量使用

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