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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (19): 39-41.doi: 10.11924/j.issn.1000-6850.2011-3912

• 林学 园艺 园林 • 上一篇    下一篇

喷施水杨酸缓解镉对黑麦草毒害作用的研究

池春玉   

  • 收稿日期:2011-12-26 修回日期:2012-02-20 出版日期:2012-07-05 发布日期:2012-07-05

Salicylic acid alleviate the toxic effects of cadmium on Lolium perenne L.

  • Received:2011-12-26 Revised:2012-02-20 Online:2012-07-05 Published:2012-07-05

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摘要：

为了研究水杨酸缓解重金属镉对黑麦草的毒害作用，采用盆栽模拟方法测定喷施外源水杨酸后在镉胁迫处理下黑麦草的生理指标的变化情况。研究结果表明：喷施100、200和300 mg/L 3种浓度水杨酸对镉胁迫下黑麦草叶绿素含量没有显著影响，但能够提高黑麦草叶片中重要的渗透调节物质脯氨酸和可溶性糖含量，其中200 mg/L浓度水杨酸对脯氨酸的提高作用显著高于其他浓度；喷施水杨酸也能够显著提高SOD、POD、CAT等多种抗氧化酶的活性，降低电解质渗透率和丙二醛含量，各浓度之间作用程度差异不显著，200和300 mg/L浓度的作用更大一些。上述生理指标的测定说明喷施水杨酸可以缓解镉对黑麦草的毒害作用。

关键词: 大庆市, 大庆市

Abstract:

In order to study the salicylic acid to alleviate the toxic effects of cadmium on the ryegrass (Lolium perenne L.), a pot experiment was used to determinate of the changes of physiological indicators of the ryegrass under heavy metal cadmium stress spraying exogenous salicylic acid. The results showed that the spraying of 100, 200 and 300 mg/L of the concentration of salicylic acid on the ryegrass under Cd stress had no significant effect at the chlorophyll content, but could increase the contents of the proline and the soluble sugar, the important osmotic adjustment substances, in the ryegrass leaves, enhancement effect of 200 mg/L concentration of salicylic acid on proline content was significantly higher than that of the other concentrations; spraying salicylic acid could significantly increase the activity of SOD, POD, CAT and other antioxidant enzyme, reduce the electrolyte permeability and MDA content in various concentrations. The significant difference between the level difference was not exist, 200 and 300 mg/L concentrations had greater role. The determination of physiological index could state that salicylic acid relieved the toxic effects of cadmium on ryegrass.