| Texto completo | |
| Autor(es): |
Moraes, Beatriz V.
;
Coelho, Milene I. S.
;
Silva, Patrick S.
;
Araujo, Ademir S. F.
;
Bonifacio, Aurenivia
;
Pereira, Arthur P. A.
;
de Medeiros, Erika V.
;
Araujo, Fabio F.
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Plant Physiology and Biochemistry; v. 220, p. 6-pg., 2025-03-25. |
| Resumo | |
Bacillus subtilis is known to promote root growth and improve plant physiology, while organic compost enhances soil water retention. This study explored the combined effect of inoculating B. subtilis in organic compost on soybean growth under water deficit. The treatments included chemical fertilization, non-inoculated organic compost, and organic compost inoculated with B. subtilis which were assessed under well-watered and waterdeficit conditions. The organic compost inoculated with B. subtilis increased root biomass, length, volume, and the number of root tips under well-watered conditions, although it reduced root diameter. Under water deficit, the organic compost inoculated with B. subtilis increased root tip number (similar to 150%), biomass (similar to 95%) and number (similar to 85%) of nodules. Water deficit negatively affected soybean physiology, reduced photosynthesis, transpiration, and stomatal conductance, while increased internal COQ concentration. However, the organic compost inoculated with B. subtilis mitigated these effects, enhancing photosynthesis (similar to 20%) and water use efficiency (similar to 25%). Under water deficit, this treatment also increased shoot biomass by 15% and the drought tolerance index by 51% compared to the control. The combination of B. subtilis and organic compost improved root architecture, nodulation, and drought tolerance. These results suggest that B. subtilis inoculated in the organic compost is a promising strategy for enhancing soybean productivity and resilience under water stress, offering a novel approach to mitigating drought effects in agriculture. (AU) | |
| Processo FAPESP: | 21/10823-0 - Comunidade microbiana na rizosfera da soja e braquiaria e sua relação com a supressão de nematóides em sistema de integração lavoura-pecuária |
| Beneficiário: | Fabio Fernando de Araujo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |