HAN Shumei,CHEN Lin,LIU Yuting,et al.Effects of Exogenous Salicylic Acid on the Physiological Characteristics of Tagetes patula L.Under Cadmium Stress[J].Northern Horticulture,2021,(09):68-73.[doi:10.11937/bfyy.20203196]
外源水杨酸对镉胁迫下孔雀草生理特性的影响
- Title:
- Effects of Exogenous Salicylic Acid on the Physiological Characteristics of Tagetes patula L.Under Cadmium Stress
- 文献标志码:
- A
- 摘要:
- 以镉超富集植物孔雀草（Tagets patula L.）为试验材料，采用土培试验，研究叶面喷施不同浓度水杨酸（SA，0.1、0.2、0.3、0.4 mmol?L-1）对镉胁迫下孔雀草过氧化氢酶、过氧化物酶、超氧化物歧化酶活性，丙二醛、可溶性蛋白质、脯氨酸、叶绿素含量的影响，以期为孔雀草应用于重金属污染土壤修复提供参考依据。结果表明：适当浓度的外源SA（0.1~0.3 mmol?L-1）增强了孔雀草的抗逆性，但高浓度SA（0.4 mmol?L-1）对孔雀草植株缓解作用明显降低。其中0.1 mmol?L-1 SA处理能显著提高镉胁迫下孔雀草叶片叶绿素含量；0.3 mmol?L-1 SA处理能显著提高镉胁迫下孔雀草叶片过氧化氢酶、过氧化物酶、超氧化物歧化酶活性，可溶性蛋白质、脯氨酸的含量；0.2 mmol?L-1 SA处理能显著降低孔雀草叶片丙二醛含量；0.4 mmol?L-1 SA处理对孔雀草叶片各生理指标缓解作用明显降低。
- Abstract:
- Cadmium hyperaccumulator Tagetes patula L.was used as experimental material.The effects of different concentrations of salicylic acid (SA,0.1，0.2，0.3，0.4 mmol?L-1）on the CAT，POD，SOD activities and MDA,soluble protein,proline,chlorophyll contents of Tagetes patula L.under cadmium stress were studied by soil culture experiment，in order to provide a reference for the application of maidenhair in the remediation of heavy metal contaminated soil.The results showed that suitable concentration of exogenous salicylic acid (0.1-0.3 mmol?L-1) enhanced the stress resistance of Tagetes patula L..However，high concentration of salicylic acid (0.4 mmol?L-1) significantly reduced the alleviation effect of Tagetes patula L..0.1 mmol?L-1 SA significantly increased the content of Chl；0.3 mmol?L-1SA significantly increased the content of CAT，POD，SOD activity and soluble protein,proline content；0.2 mmol?L-1 SA significantly decreased the content of MDA，0.4 mmol?L-1 SA reduced the alleviative effect on physiological indexes of Tagetes patula L.leaves.
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备注/Memo
第一作者简介：韩淑梅（1988-），女，硕士，高级实验师，现主要从事植物逆境胁迫等研究工作。E-mail：hansm1028@163.com.责任作者：杨慧霞（1983-），女，博士，副教授，现主要从事环境水力学及水污染控制等研究工作。E-mail：bt-yanghuixia@163.com.基金项目：贵州省科技计划资助项目（[2016]2612号）；贵州省教育厅青年科技人才成长资助项目（黔教合KY字[2017]120）。收稿日期：2020-07-29