Ji Haihua, Wang Jinghong, Chen Feiran, Fan Ningke, Wang Xie, Xiao Zhenggao, Wang Zhenyu
Institute of Environmental Processes and Pollution Control, School of Environmental and Civil Engineering, Jiangsu Engineering Laboratory for Biomass Energy and Carbon Reduction Technology, Jiangnan University, Wuxi 214122, China.
Institute of Agricultural Resources and Environment, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China.
Sci Total Environ. 2022 Dec 10;851(Pt 1):158212. doi: 10.1016/j.scitotenv.2022.158212. Epub 2022 Aug 24.
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 protection in agriculture.
壳聚糖作为一种天然无毒的生物材料，已被证明能增强植物对氧化应激的防御能力。然而，壳聚糖应用如何改变植物氧化应激缓解的一般模式和机制尚未阐明。在此，我们对截至2022年1月发表的58篇文章进行了荟萃分析，以填补这一知识空白，发现壳聚糖应用在胁迫条件下显著提高了抗氧化酶活性（提高40.6%）、抗氧化代谢物含量（提高24.6%）、防御酶活性（提高77.9%）、防御相关基因表达（提高103.2%）、植物激素（提高26.9%）和渗透调节物质（提高23.2%），这反过来又显著降低了氧化应激（降低32.2%），并增加了植物生物量（增加28.1%）和产量（增加15.7%）。此外，壳聚糖介导的对氧化应激缓解的影响取决于壳聚糖的性质和应用方法。我们的研究结果提供了对壳聚糖缓解氧化应激机制的全面理解，这将促进壳聚糖在农业植物保护中的应用。
