云南师范大学学报（自然科学版）2024，Vol.44Issue(1)：59-64,6.DOI:10.7699/j.ynnu.ns-2024-012
鬼针草对重金属镉的耐受性和抗氧化酶响应特征研究
Study on Tolerance and Antioxidant Enzyme Response Characteristics of Bidens pilosa L.to Cadmium
摘要
Abstract
Nutrient solution cultivation was used to set up stress treatments with different concentra-tions of Cd(0,20,40,80 mg/L and 160 mg/L),and the growth,tolerance and antioxidant enzyme changes of Bidens pilosa L.were investigatived under different concentrations of Cd.The results showed that with increasing Cd stress concentration,the growth of B.pilosa was inhibited and sup-pressed.Plant height and biomass significantly decreased.The root tolerance coefficient reached a maxi-mum of 0.60 at a Cd concentration of 20 mg/L.The Cd content in the plant increased with the stress concentration,with the highest content of 1 203.64 mg/kg in the roots.The total Cd accumulation reached its maximum in the Cd1(20 mg/L)treatment and gradually decreased afterward.The activi-ties of the antioxidant enzymes(SOD,POD,CAT)showed a trend of initial increase,decrease,and then increase again,indicating a response process to Cd stress.The change in SOD activity was highly positively correlated(P<0.01)with the Cd absorption in B.pilosa.This study demonstrates that B.pilosa has a strong Cd absorption capacity and is suitable for the remediation of contaminated soils with Cd concentrations lower than 20 mg/L.It also provides a preliminary exploration of the response mechanism of the antioxidant system in B.pilosa to stress,which can serve as a reference for the phy-toremediation of Cd-contaminated soils.关键词
镉胁迫/鬼针草/重金属耐受性/抗氧化酶Key words
Cadmium stress/Bidens pilosa L./Heavy metal tolerance/Antioxidant enzyme分类
资源环境引用本文复制引用
韩飞,陈春,资静云,史任芬,沈蕊,黄晶心,岳志强,孙世中,宋洪川..鬼针草对重金属镉的耐受性和抗氧化酶响应特征研究[J].云南师范大学学报（自然科学版）,2024,44(1):59-64,6.基金项目
国家自然科学基金资助项目(31800443,32360317) （31800443,32360317）
云南省基础研究计划资助项目(202301AT070077). （202301AT070077）
