Data/hora: 11/06/2024 23:28:50

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 18/12/2023
Data da última atualização: | 18/12/2023
Autoria: | CORREA, S. S.; PACHECO, R. S.; VIANA, G. C.; VIDAL, M. S.; XAVIER, G. R.; ARAUJO, J. L. S. de.
Afiliação: | SULAMITA SANTOS CORREA, UFRJ; RAFAEL SANCHES PACHECO, BOLSISTA EMBRAPA AGROBIOLOGIA; GUILHERME CALDIERARO VIANA, BOLSISTA EMBRAPA AGROBIOLOGIA; MARCIA SOARES VIDAL, CNPAB; GUSTAVO RIBEIRO XAVIER, CNPAB; JEAN LUIZ SIMOES DE ARAUJO, CNPAB.
Título: | Ability of nitrogen‐fxing bacteria to alleviate drought stress in cowpea varies depending on the origin of the inoculated strain.
Ano de publicação: | 2023
Fonte/Imprenta: | Plant Soil, published online, 14 December 2023.
ISSN: | 1573-5036
DOI: | https://doi.org/10.1007/s11104-023-06443-3
Idioma: | Inglês
Conteúdo: | Drought is one of the main causes of global crop decline. Plant growth-promoting rhizobacteria enhance plant tolerance to adverse environmental conditions. This study aimed to determine whether the rhizobacteria Microvirga vignae (BR 3296 and BR 3299) and Bradyrhizobium sp. (BR 3301) can maintain cowpea growth under drought stress. We analyzed biomass, nodulation, nitrogen accumulation, and physiological traits of the inoculated plants. Rhizobacterial strains were assessed for exopolysaccharide (EPS) and indole acetic acid (IAA) production, growth, and biofilm formation in a water-stress medium induced by polyethylene glycol (PEG)-6000. The expression of genes associated with abscisic acid (ABA) biosynthesis in root nodules was also investigated. Our results suggest that M. vignae strains, isolated from a semi-arid region, help plants withstand water-stress, whereas the strain of Bradyrhizobium sp. isolated from a wet region did not effectively alleviate drought stress. However, Bradyrhizobium sp. conferred growth and nitrogen accumulation to cowpea superior to M. vignae and like plants supplied with nitrogen fertilizer.
Palavras-Chave: | Rhizobacteria.
Thesagro: | Vigna Unguiculata.
Thesaurus Nal: | Bradyrhizobium; Drought.
Categoria do assunto: | S Ciências Biológicas
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (42205-1) - UPC - AP - DD -  -  -  - DIS