Título:	Bacillus aryabhattai and silicon modulate soil biological activity and performance of Mimosa caesalpiniifolia under water deficit.
Autor:	MOTA, K. da S. GARCIA, K. G. V. ALMEIDA, M. de S. BARBOSA, F. L. A. BORGES, W. L. MESQUITA, R. O. ARAUJO, A. S. F. SOUSA, G. G. de PEREIRA, A. P. de A.
Afiliación:	KELE DA SILVA MOTA, UNIVERSIDADE FEDERAL DO CEARÁ; KAIO GRÁCULO VIEIRA GARCIA, UNIVERSIDADE FEDERAL DO CEARÁ; MURILO DE SOUSA ALMEIDA, UNIVERSIDADE FEDERAL DO CEARÁ; FRANCISCO LUAN ALMEIDA BARBOSA, UNIVERSIDADE FEDERAL DO CEARÁ; WARDSSON LUSTRINO BORGES, CNPAT; ROSILENE OLIVEIRA MESQUITA, UNIVERSIDADE FEDERAL DO CEARÁ; ADEMIR SERGIO FERREIRA ARAUJO, UNIVERSIDADE FEDERAL DO PIAUÍ; GEOCLEBER GOMES DE SOUSA, UNIVERSIDADE DA INTEGRAÇÃO INTERNACIONAL DA LUSOFONIA AFRO-BRASILEIRA; ARTHUR PRUDÊNCIO DE ARAUJO PEREIRA, UNIVERSIDADE FEDERAL DO CEARÁ.
Año:	2026
Referencia:	Brazilian Journal of Microbiology, v. 57, n. 1, 84, Dec. 2026.
Descripción:	Mimosa caesalpiniifolia is a native legume commonly used in agroforestry systems, degraded land recovery, and timber production in semiarid regions. Although this species is naturally hardy, its seedlings are highly sensitive to water deficit during early growth stages, limiting their establishment under drought conditions. This study investigated the effects of Bacillus aryabhattai inoculation and silicon (Si) application on seedling growth, physiological performance, and soil microbial and enzymatic activity under two water regimes (50% and 100% water level) and four treatments (control, B. aryabhattai, Si, and B. aryabhattai + Si), in a greenhouse experiment. Seedlings under 100% water level showed significantly higher shoot and root biomass, leaf number, root length, plant height, and seedling quality indices. Chlorophyll and carotenoid contents increased in combined B. aryabhattai + Si treatments, independent of water level. Water use efficiency improved under drought conditions (50%). Soil basal respiration rose by ~ 87% and 75% with B. aryabhattai and B. aryabhattai + Si at 50% water level, respectively. Enzymatic activities (arylsulfatase, β-glucosidase, phosphatases, urease) increased up to 600% with B. aryabhattai + Si compared to control. Si concentration was highest in shoots with B. aryabhattai at 100% water level, and in roots with B. aryabhattai + Si at 50% water level. Soil Si concentration peaked in the Si-only treatment at 100% water level. These findings demonstrate the synergistic potential of B. aryabhattai and Si to enhance drought tolerance and soil biological quality in M. caesalpiniifolia seedlings, supporting sustainable restoration in semiarid ecosystems.
Thesagro:	Sabiá Silício Microbiologia do Solo Respiração do Solo
NAL Thesaurus:	Mimosa caesalpiniifolia Bacillus aryabhattai Silicon Water stress Plant growth-promoting rhizobacteria Soil respiration Soil biological properties Soil enzymes
Palabras clave:	Estresse hídrico Rizobactérias promotoras de crescimento vegetal Atividade enzimática do solo
ISSN:	1678-4405
DOI:	https://doi.org/10.1007/s42770-026-01912-0
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPAT)