毒性
化学
光合作用
脂质过氧化
钴
金属毒性
金属
氧化应激
谷胱甘肽
铜
铜毒性
开枪
环境化学
抗氧化剂
植物毒性
酶
植物
生物化学
生物
无机化学
有机化学
作者
Jonas Lwalaba Wa Lwalaba,Laurence Tennyson Louis,Gerald Zvobgo,Liangbo Fu,Theodore M. Mwamba,Robert Prince Mukobo Mundende,Guoping Zhang
标识
DOI:10.1016/j.ecoenv.2019.04.077
摘要
Cobalt (Co) commonly co-exists with copper (Cu) in natural soils, but the information about their combined effects on plants is poorly available. In this study, we hydroponically investigated the combined effects of Co and Cu on two barley genotypes differing in Co toxicity tolerance to reveal the interaction pattern of these two metals. The results showed that single treatment of Co or Cu at the dose of 100 μM led to a significant decrease of growth and photosynthetic rate, and a significant increase of lipid peroxidation, ROS radicals as well as anti-oxidative enzyme (SOD, CAT and GR) activities and glutathione content, with the extent of effect being less in Yan66 than Ea52. The combined treatment of Co and Cu alleviated the toxicity of both metals in comparison with each metal treatment alone, as reflected by improved growth and photosynthesis, and much slight oxidative stress. The alleviation of metal toxicity upon combined treatment is mainly attributed to a drastic reduction of Co uptake and its translocation from roots to shoots. It may be suggested that interaction of Co and Cu on their uptake and movement in plants is antagonistic.
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