镉
水稻
细胞外
液泡
开枪
脂质过氧化
氧化应激
胞外聚合物
抗氧化剂
毒性
谷胱甘肽
化学
细胞壁
生物
生物化学
细胞生物学
植物
基因
细胞质
酶
细菌
有机化学
遗传学
生物膜
作者
Tianyuan Gu,Yujie Lu,Fang Li,Weimin Zeng,Li Shen,Runlan Yu,Jiaokun Li
标识
DOI:10.1016/j.ecoenv.2023.114958
摘要
Cadmium (Cd) accumulation in crops causes potential risks to human health. Microbial extracellular polymeric substances (EPS) are a complex mixture of biopolymers that can bind various heavy metals. The present work examined the alleviating effects of EPS on Cd toxicity in rice and its detoxification mechanism. The 100 μM Cd stress hampered the overall plant growth and development, damaged the ultrastructures of both leaf and root cells, and caused severe lipid peroxidation in rice plants. However, applying EPS at a concentration of 100 mg/L during Cd stress resulted in increased biomass, reduced Cd accumulation and transport, and minimized the oxidative damage. EPS application also enhanced Cd retention in the shoot cell walls and root vacuoles, and actively altered the expression of genes involved in cell wall formation, antioxidant defense systems, transcription factors, and hormone metabolism. These findings provide new insights into EPS-mediated mitigation of Cd stress in plants and help us to develop strategies to improve crop yield in Cd-contaminated soils in the future.
科研通智能强力驱动
Strongly Powered by AbleSci AI