ArticleBMC plant biology2025
Synergistic effect of grassland plants and beneficial rhizosphere bacteria helps plants cope with overgrazing stress.
Article in BMC plant biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Experimental warming alleviates leaf-level physiological stress of Kobresia pygmaea in alpine meadows on the Northeastern Qinghai-Tibet Plateau.BMC plant biology · 2026Article
- Harnessing synergistic potential of plant growth promoting bacteria to mitigate climate-induced stress in plants.Frontiers in plant science · 2026Review
- The Bacterial Community Characteristics ofBiology · 2025Article
- Alleviating Overgrazing Stress and Promoting Grassland Plant Regeneration via Root Exudate-Mediated Recruitment of Beneficial Bacteria.Microorganisms · 2025Article
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Authors and funding
10 authors.
Funding
Abstract
backgroundOvergrazing (OG) is an important driver of grassland degradation and productivity decline. Highly effective synergy between plants and rhizosphere growth-promoting rhizobacteria (PGPR) may be a major way for grassland plants to effectively cope with OG stress. There have been few reports providing solid evidence on how this synergy occurs.
resultThis study combined with multi-omics analysis and the interaction effect of specific root exudate with PGPR B68, aiming to reveal the synergistic effect and regulatory mechanism of L. chinensis and PGPR under overgrazing stress. The results showed that Leymus chinensis plants with OG history can recruit the beneficial Phyllobacterium sp. B68 by regulating specific root exudate compounds(such as amino acid L-leucyl-L-alanine and alkaloid cordycepin). These compounds enhanced B68 rhizosphere colonization by promoting B68 chemotaxis and biofilm formation. The pot study experiments indicated that the bacterial isolates used as bio inoculants increased L. chinensis growth (mainly including plant height and biomass) by significantly increasing the chlorophyll content, RuBisCO activity, soluble sugar, plant hormones and nutrient content. Metagenomics results show that B68 inoculation significantly altered rhizosphere soil bacterial community composition and function. Additionally, B68 systemically upregulated the expression level of genes involved in plant hormone signaling, nutrient and sugar transporters, nitrogen metabolism, cell division, cell wall modification and photosynthesis to promote plant growth. The above results indicate that the PGPR B68 recruited by the root exudates of L. chinensis under OG helps the plant adapt to stress by promoting nutrient uptake and transport, maintaining hormone homeostasis, and enhancing the expression of genes related to plant growth and nutrient metabolism.
conclusionThis study provides new insights into the positive interactions between grassland plants and rhizosphere bacteria under OG stress, offering valuable knowledge for developing new fertilizers and better management practices for degraded rangeland restoration and sustainable agriculture development. CLINICAL TRIAL NUMBER: Not applicable.
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