Meta-analysis of chitosan-mediated effects on plant defense against oxidative stress
Meta-analysis of chitosan-mediated effects on plant defense against oxidative stress
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壳聚糖介导的植物防御氧化应激作用的荟萃分析。
DOI：
10.1016/j.scitotenv.2022.158212
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发表时间：
2022-08-27
影响因子：
9.8
通讯作者：
Wang, Zhenyu
中科院分区：
文献类型：
--
作者：
Ji, Haihua;Wang, Jinghong;Wang, Zhenyu
壳聚糖作为一种天然无毒生物材料，已被证明可以增强植物对氧化应激的防御能力。然而，壳聚糖如何改善植物氧化胁迫的一般模式和机制尚未阐明。在此，我们对截至2022年1月的58篇已发表文章进行了荟萃分析，以填补这一知识空白，发现壳聚糖应用显著增加了抗氧化酶活性（增加40.6%），抗氧化代谢物含量（增加24.6%），防御酶活性（77.9%），防御相关基因表达（103.2%），植物激素（26.9%）和渗透调节剂（23.2%），这又显著降低了氧化胁迫（32.2%），并增加了植物生物量（28.1%）和产量（15.7%）。此外，壳聚糖介导的改善氧化应激的作用取决于壳聚糖的性质和应用方法。本研究为壳聚糖缓解植物氧化胁迫的机理提供了一个全面的认识，将促进壳聚糖在农业植物保护中的应用。
Chitosan, as a natural non-toxic biomaterial, has been demonstrated to enhance plant defense against oxidative stress. However, the general pattern and mechanism of how chitosan application modifies the amelioration of oxidative stress in plants have not been elucidated yet. Herein, we performed a meta-analysis of 58 published articles up to January 2022 to fill this knowledge gap, and found that chitosan application significantly increased the antioxidant enzyme activity (by 40.6 %), antioxidant metabolites content (by 24.6 %), defense enzyme activity (by 77.9 %), defense -related genes expression (by 103.2 %), phytohormones (by 26.9 %), and osmotic regulators (by 23.2 %) under stress conditions, which in turn notably reduced oxidative stress (by 32.2 %), and increased plant biomass (by 28.1 %) and yield (by 15.7 %). Moreover, chitosan-mediated effects on the amelioration of oxidative stress depended on the properties and application methods of chitosan. Our findings provide a comprehensive understanding of the mechanism of chitosan-alleviated oxidative stress, which would promote the application of chitosan in plant protec-tion in agriculture.