干旱区研究2026，Vol.43Issue(3)：574-584,11.DOI:10.13866/j.azr.2026.03.11
苦豆子幼苗的功能性状对三种铜盐胁迫的响应
Functional response characteristics of Sophora alopecuroides seedlings under stress due to three copper salts
摘要
Abstract
This study investigated the effects of three copper salts[CuSO4,Cu(CH3COO)2,and Cu(NO3)2]at dif-ferent concentration gradients(50,100,200,400,and 500 mg·L-1)on various functional traits of Sophora alope-curoides seedlings,aiming to provide a scientific basis for screening native plant resources for soil ecological res-toration in copper-contaminated areas.The results showed significant differences in the effects of different copper salts and their concentrations on the growth and physiological indicators of S.alopecuroides seedlings.Growth parameters of S.alopecuroides initially increased and subsequently decreased with the increase in stress intensi-ty—that is,low-concentration copper stress showed a growth-promoting effect,whereas high-concentration cop-per stress inhibited growth.Among the three salts,CuSO4 exhibited the highest inhibitory effect on the growth of S.alopecuroides.Under stress due to the three copper salts,the chlorophyll,soluble sugar,and soluble protein content in S.alopecuroides seedlings also initially increased and subsequently decreased with increasing salt con-centration.Superoxide dismutase(SOD)activity under Cu(CH3COO)2 treatment was significantly higher than un-der treatment with the other two copper salts.Pearson correlation analysis revealed a significant correlation among the growth and physiological indicators of S.alopecuroides seedlings under different copper salt treat-ments.The SOD content of Cu(NO3)2 was significantly positively correlated with soluble protein and soluble sugar.Fuzzy comprehensive evaluation showed that plants in the CuSO4(100 mg·L-1)treatment group showed high tolerance and could effectively maintain growth and physiological functions,whereas those in the CuSO4(500 mg·L-1)treatment group showed low tolerance.As a native plant,S.alopecuroides has high adaptability and tolerance and can play an important role as a pioneer or tolerant plant in copper-contaminated areas such as waste-lands and mining areas.关键词
苦豆子/铜胁迫/植物修复/抗氧化酶/隶属函数Key words
Sophora alopecuroides/copper speciation/phytoremediation/antioxidant enzymes/fuzzy member-ship function引用本文复制引用
赵红梅,刘影,白益军,赵玉,徐孟宇,杨允菲,尚天翠..苦豆子幼苗的功能性状对三种铜盐胁迫的响应[J].干旱区研究,2026,43(3):574-584,11.基金项目
国家自然科学基金项目(31360101,32360265) （31360101,32360265）
伊犁河谷资源植物保护与利用重点实验室(2024HGYB01) （2024HGYB01）
大学生创新创业训练项目(202410764017) （202410764017）
