Heavy metal stress in plants: Ways to alleviate with exogenous substances

重金属 农业 工业化 环境科学 生态系统 有机体 自然资源经济学 生物技术 生物 环境化学 化学 生态学 古生物学 经济 市场经济
作者
Di Feng,R. Wang,Xiaoan Sun,L C Liu,Ping Liu,Jingchun Tang,Chenxi Zhang,Hao Liu
出处
期刊:Science of The Total Environment [Elsevier]
卷期号:897: 165397-165397 被引量:22
标识
DOI:10.1016/j.scitotenv.2023.165397
摘要

Accumulation and enrichment of excessive heavy metals due to industrialization and modernization not only devastate our ecosystem, but also pose a threat to the global vegetation, especially crops. To improve plant resilience against heavy metal stress (HMS), numerous exogenous substances (ESs) have been tried as the alleviating agents. After a careful and thorough review of over 150 recently published literature, 93 reported ESs and their corresponding effects on alleviating HMS, we propose that 7 underlying mechanisms of ESs be categorized in plants for: 1) improving the capacity of the antioxidant system, 2) inducing the synthesis of osmoregulatory substances, 3) enhancing the photochemical system, 4) detouring the accumulation and migration of heavy metals, 5) regulating the secretion of endogenous hormones, 6) modulating gene expressions, and 7) participating in microbe-involved regulations. Recent research advances strongly indicate that ESs have proven to be effective in mitigating a potential negative impact of HMS on crops and other plants, but not enough to ultimately solve the devastating problem associated with excessive heavy metals. Therefore, much more research should be focused and carried out to eliminate HMS for the sustainable agriculture and clean environmental through minimizing towards prohibiting heavy metals from entering our ecosystem, phytodetoxicating polluted landscapes, retrieving heavy metals from detoxicating plants or crop, breeding for more tolerant cultivars for both high yield and tolerance against HMS, and seeking synergetic effect of multiply ESs on HMS alleviation in our feature researches.
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