Arbuscular mycorrhizal fungi enhance Leymus chinensis resistance to salinity predominantly through regulating root endosphere bacteria

IF 3.9 2区 农林科学 Q1 AGRONOMY
Peiran Guo, Yazhou Hou, Bingbing Jia, Yuchen Wang, Chengyan Lu, Run Wang, Jiaying Lin, Yanan Zhang, Wei Guo, Frank Yonghong Li
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Abstract

Background and aims

Leymus chinensis is a promising grass species for restoring saline alkali grasslands, and its salt tolerance can be improved after inoculation with AMF. However, it is still unknown whether AMF can help plant adapt to saline stress by regulating plant associated microbiome of L. chinensis.

Methods

Pot experiments were conducted to investigate the effects of Rhizophagus intraradices on the growth of L. chinensis in natural saline soil through determining physicochemical indicators included biomass, ion concentration, physiological characteristics, rhizosphere soil properties and bacterial communities in the rhizosphere, root and shoot endosphere.

Results

The results demonstrated that R. intraradices significantly increased the biomass of L. chinensis and had a positive impact on ion absorption balance and physiological regulation. More importantly, the beneficial bacteria within rhizosphere, root and shoot endosphere were enriched. The microbial interaction networks in the rhizosphere, root and shoot endosphere became more complex and modular, with the changes of keystone taxa. Moreover, the correlation between microbial and plant biomass indicators has been strengthened. Microbial interaction networks had more effect than microbial diversity in promoting plant growth. Compared with the rhizosphere and shoot endosphere bacteria, the root endosphere bacteria regulated by AMF plays a greater role in improving biomass of L. chinensis.

Conclusion

Bacterial interaction patterns in the rhizosphere, root and shoot endosphere contribute to the growth of L. chinensis with AMF inoculation. Root bacterial community regulated by AMF play an important role in L. chinensis resistance to salinity.

Graphical Abstract

Abstract Image

丛枝菌根真菌主要通过调节根系内圈细菌来增强莱姆斯 chinensis 的抗盐碱能力
背景和目的禾本科植物盐碱地禾本科植物(Leymus chinensis)是一种具有恢复盐碱地潜力的草种,接种AMF后可提高其耐盐性。然而,AMF 是否能通过调节植物相关微生物群帮助植物适应盐碱胁迫仍是一个未知数。结果结果表明,Rhizophagus intraradices 显著增加了盐碱地中耧斗菜的生物量,并对离子吸收平衡和生理调节产生了积极影响。更重要的是,根圈、根和芽内圈的有益菌得到了丰富。随着关键类群的变化,根圈、根和芽内圈的微生物相互作用网络变得更加复杂和模块化。此外,微生物与植物生物量指标之间的相关性也得到了加强。在促进植物生长方面,微生物相互作用网络比微生物多样性的作用更大。结论根圈、根部和芽部内圈的细菌互作模式对接种 AMF 的金线莲的生长有促进作用。AMF调控的根部细菌群落在五倍子的抗盐碱能力中发挥了重要作用。
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来源期刊
Plant and Soil
Plant and Soil 农林科学-农艺学
CiteScore
8.20
自引率
8.20%
发文量
543
审稿时长
2.5 months
期刊介绍: Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.
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