生态与农村环境学报2024，Vol.40Issue(7)：964-974,11.DOI:10.19741/j.issn.1673-4831.2024.0053
香根草对镉-扑草净复合污染胁迫的生理响应
Physiological Response of Vetiveria zizanioides to Cadmium-prometryn Composite Pollution Stress
摘要
Abstract
The response of vetiver grass(Vetiveria zizanioides)to single or co-presence of Cd and prometryn was investi-gated in hydroponic in the greenhouse.The fresh weight,chlorophyll content,root activity,and antioxidant enzyme system of V.zizanioides were analyzed.The results show that the total fresh weight and fresh weight growth rate of V.zizanioides in single Cd treatment showed no significant difference(P＞0.05)compared to the control(without Cd or prometryn).How-ever,single prometryn and Cd-prometryn co-presence significantly decreased(P＜0.05)the total fresh weight and growth rate of V.zizanioides.Specifically,single prometryn treatment decreased the total fresh weight and growth rate of V.zi-zanioides by 32.72 g and 11.66％,respectively.Cd-prometryn co-presence decreased the total fresh weight and growth rate by 16.85 g and 6.69％,respectively.The contents of Chla,Chlb,and Chlt in V.zizanioides were decreased in single prometryn treatment,while increased under single Cd and Cd-prometryn co-presence treatments.V.zizanioides root activity was significantly higher in single Cd or prometryn,and Cd-prometryn co-presence treatments compared to control excepting at 0 d and 6 d.With the extension of cultivation time,the contents of superoxide dismutase(SOD),peroxidase(POD),catalase(CAT),and malondialdehyde(MDA)in V.zizanioides roots,stems,and leaves showed different trends under Cd and prometryn single or composite stress.V.zizanioides showed strong tolerance to single/composite pollution stress of Cd and prometryn via adjusting the antioxidant enzyme system.The research results provide theoretical supports for screen-ing artificial wetland plants for efficient remediation of single or composite pollution of heavy metal and pesticide.关键词
香根草/植物修复/镉/扑草净/污染胁迫Key words
Vetiveria zizanioides/phytoremediation/cadmium/prometryn/pollution stress分类
资源环境引用本文复制引用
杨秀彪,吴珂,欧朝蓉,杨迈,孙仕仙..香根草对镉-扑草净复合污染胁迫的生理响应[J].生态与农村环境学报,2024,40(7):964-974,11.基金项目
云南省基础研究计划重点项目(202201AS070028) （202201AS070028）
国家自然科学基金(42167057) （42167057）
云南省"万人计划"青年拔尖人才专项(990122049) （990122049）
