Melatonin alleviates apple replant disease by regulating the endophytic microbiome of roots and phloridzin accumulation

IF 6.1 1区 生物学 Q1 MICROBIOLOGY
Changqing Ma , Peihua Du , Yang Cao , Huaite Liu , Lisong Ma , Bowen Liang
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Abstract

Melatonin administration is an environmentally effective strategy to mitigate apple replant disease (ARD), but its mechanism of action is unknown. This study investigated the protective effect of melatonin on ARD and the underlying mechanism. In field experiments, melatonin significantly reduced phloridzin levels in apple roots and rhizosphere soil. A correlation analysis indicated that a potential antagonistic interaction between melatonin and phloridzin was crucial for improving soil physicochemical properties, increasing the diversity of endophytic bacterial communities in roots of apple seedlings, and promoting mineral element absorption by the plants. Melatonin also reduced the abundance of Fusarium in roots. The ability of melatonin to reduce phloridzin levels both in soil and in plants was also demonstrated in a pot experiment. Azovibrio were specifically recruited in response to melatonin and their abundance was negatively correlated with phloridzin levels. Fusarium species that have a negative impact on plant growth were also inhibited by melatonin. Our results show that melatonin improves the rhizosphere environment as well as the structure of the endophytic microbiota community, by reducing phloridzin levels in rhizosphere soil and roots. These regulatory effects of melatonin support its use to improve the physiological state of plants under ARD conditions and thereby overcome the barriers of perennial cropping systems.

褪黑素通过调节根部的内生微生物群和phloridzin的积累来减轻苹果移栽病害。
施用褪黑激素是减轻苹果再植病(ARD)的一种环境有效策略,但其作用机制尚不清楚。本研究调查了褪黑激素对苹果再植病(ARD)的保护作用及其机理。在田间试验中,褪黑激素显著降低了苹果根部和根瘤土壤中的氯唑嗪含量。相关性分析表明,褪黑素与披碱草素之间潜在的拮抗作用对于改善土壤理化性质、增加苹果幼苗根部内生细菌群落的多样性以及促进植物对矿质元素的吸收至关重要。褪黑素还能减少根部镰刀菌的数量。盆栽实验也证明,褪黑激素能够降低土壤和植物中的杀螟丹含量。Azovibrio 对褪黑激素有特异性反应,它们的数量与 phloridzin 的水平呈负相关。褪黑激素还能抑制对植物生长有负面影响的镰刀菌。我们的研究结果表明,褪黑激素通过降低根瘤菌圈土壤和根部的氯唑嗪水平,改善了根瘤菌圈环境以及内生微生物群落的结构。褪黑激素的这些调节作用支持利用它来改善 ARD 条件下植物的生理状态,从而克服多年生耕作系统的障碍。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Microbiological research
Microbiological research 生物-微生物学
CiteScore
10.90
自引率
6.00%
发文量
249
审稿时长
29 days
期刊介绍: Microbiological Research is devoted to publishing reports on prokaryotic and eukaryotic microorganisms such as yeasts, fungi, bacteria, archaea, and protozoa. Research on interactions between pathogenic microorganisms and their environment or hosts are also covered.
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