黑色素通过调节根内生菌社区结构和果中的代谢物组成来减轻的毒性
Yang Cao1, Jiran Zhang1, Peihua Du1
1College of Horticulture, Hebei Agricultural University, No. 289 Lingyusi Street, Baoding 071001, Hebei, China.
Tree physiology
|January 15, 2024
概括
外源性黑激素的应用通过增强抗氧化防御和有益的根菌来增强果植物对 (Cd) 压力的弹性. 黑素的应用也会改变根代谢物,帮助植物应对重金属污染.
科学领域:
- 植物科学 植物科学
- 微生物学 微生物学
- 环境科学 环境科学
背景情况:
- 果园土壤中的 (Cd) 污染对植物健康构成重大威胁.
- 作为一种天然抗氧化剂的黑氨酸在减轻植物中的重金属压力方面表现有前途.
研究的目的:
- 调查外源性黑激素对果植物根内生菌群体和代谢物概况在的压力下对外源性黑激素的影响.
- 阐明黑素减轻果植物中的毒性的机制.
主要方法:
- 对果植物施加外源性黑激素,这些植物受到的压力.
- 植物生理参数的评估,包括反应性氧物种的清理,光合作用系统的恢复和抗氧化酶活动.
- 在植物组织 (根和叶) 中分析的度.
- 高通量测序以表征内生细菌社区结构和丰富性.
- 代谢学分析以确定根代谢物成分的变化.
- 同时发生的网络分析,以探索内细胞和代谢物之间的相互作用.
主要成果:
- 黑素显著降低了果根和叶子中的积.
- 黑色素治疗改善了光合作用参数和增加了抗氧化酶活性,表明增加了应激耐受性.
- 高通量测序显示,黑素增加了内菌社区的丰富性,改变了其结构,有利于潜在的有益细菌,如Ohtaekwangia,Streptomyces,Tabrizicola和Azovibrio.
- 代谢学分析显示,根代谢物发生了显著的变化,其相对丰度有所下降,这表明黑激素诱导的代谢物耗尽是抗压机制.
- 同时发生的网络分析表明,特定代谢产物与有益内植物的丰富性之间存在联系.
结论:
- 外源性黑激素通过增强抗氧化能力和促进有益的内生菌来有效地减轻果植物中的压力.
- 黑色素影响根内生菌群体和代谢特征,有助于植物在压力下的适应.
- 这些发现为了解黑激素在重金属修复的植物-微生物-代谢物相互作用中的作用提供了基础.
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