Title:	Rhizosphere microbiome functional shifts drive drought tolerance in common bean genotypes.
Authors:	MENDES, L. W. PELLEGRINETTI, T. A. SILVA, A. V. R. da CUNHA, I. C. M. NISHISAKA, C. S. BOLETA, E. H. M. LOSOVOI, L. de A. BARBOSA, M. C. MENDES, R. TSAI, S. M.
Affiliation:	L. W. MENDES; T. A. PELLEGRINETTI; A. V. R. DA SILVA; I. C. M. CUNHA; C. S. NISHISAKA; E. H. M. BOLETA; L. DE A. LOSOVOI; M. C. BARBOSA; RODRIGO MENDES, CNPMA; S. M. TSAI.
Date Issued:	2025
Citation:	In: ISME LATIN AMERICAN CONGRESS ON MICROBIAL ECOLOGY, 4., 2025, Mérida. [Abstracts]... Wageningen: The International Society for Microbial Ecology (ISME), 2025.
Pages:	2 p.
Description:	Climate change-driven increases in temperature and reductions in water availability present critical threats to global food security. Harnessing the potential of the rhizosphere microbiome represents a promising strategy to enhance crop resilience under drought stress. In this study, we investigated the responses of four common bean (Phaseolus vulgaris L.) cultivars—two drought-tolerant (BAT477, SEA5) and two drought-susceptible (IAC Milênio, IAC-Carioca 80SH)—to 96 hours of drought stress in mesocosm experiments. We assessed plant physiological responses, nutrient dynamics, and the taxonomic and functional profiles of the rhizosphere microbiome using metagenomic approaches. Drought-tolerant cultivars maintained higher photosynthetic rates, stomatal conductance, and water use efficiency compared to susceptible ones. These physiological advantages were accompanied by selective recruitment of beneficial microbial taxa, particularly Actinomycetia, enriched in genes linked to osmoprotection (e.g., trehalose, glycine betaine, proline), oxidative stress mitigation, nutrient cycling, and biofilm formation. In contrast, susceptible cultivars displayed a reactive microbial response dominated by DNA repair and antioxidant defense genes. Overall, drought triggered a differential abundance of 1,864 microbial genes, revealing significant functional shifts in the rhizosphere. Upon rehydration, drought-tolerant cultivars exhibited partial recovery of photosynthesis (48–57%), suggesting microbiome-conferred resilience. These findings highlight the genotype-specific modulation of rhizosphere microbiota and underscore the role of microbial functions in supporting plant performance under stress. This study provides mechanistic insights into microbiome-driven drought tolerance and supports the development of microbiome-based strategies for sustainable agriculture in increasingly arid environments.
Thesagro:	Rizosfera
NAL Thesaurus:	Microbiome
Type of Material:	Resumo em anais e proceedings
Access:	openAccess
Appears in Collections:	Resumo em anais de congresso (CNPMA)