Data/hora: 08/06/2024 03:33:35

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 12/07/2023
Data da última atualização: | 12/07/2023
Autoria: | MOREIRA, F. M.; CAIRO, P. A. R.; NASCIMENTO, L. R. DO; ROSA, R. C. C.; ROCHA, L. de S.; HADDAD, F.
Afiliação: | FLÁVIA MELO MOREIRA, BOLSISTA CNPMF; PAULO ARAQUÉM RAMOS CAIRO, UFOB; LUCAS RIBEIRO DO NASCIMENTO, UFRB; RAUL CASTRO CARRIELLO ROSA, CNPAB; LEANDRO DE SOUZA ROCHA, UFRB; FERNANDO HADDAD, BOLSISTA CNPAB.
Título: | Optimal growth and N use efficiency enhancements by growth- promoting rhizobacteria in seedlings banana under N2 deficiency.
Ano de publicação: | 2023
Fonte/Imprenta: | Biocatalysis and Agricultural Biotechnology, v. 50, 102734, 2023.
ISSN: | 1878-8181
DOI: | 10.1016/j.bcab.2023.102734
Idioma: | Inglês
Conteúdo: | Banana crops require higher amounts of chemical fertilizers to meet the demand of productivity international markets, which represent high costs and can be hazardous to the environment. Plant growth-promoting rhizobacteria can improve the nutrients use efficiency through their bio-chemical abilities, eventually, partially replace chemical fertilizers without reducing productiv-ity. So, this study was aimed to evaluate the agronomic efficiency of several bacterial strains, in combination with levels of N fertilization, on morphophysiological, biochemical, and nutritional characteristics related to the growth of banana seedlings, Prata Ana cultivar. The experiment was conducted in greenhouse in a 6 x 5 factorial scheme with the following factors: (1) inoculation with BR11005, BR11674, BR12137, BR12157 or BR12158, and a treatment without inoculation; and (2) doses of N (0, 50, 100, 150 or 200 mg kg-1 of substrate). Bacterial strains were character-ized with respect to genetical, biochemical and physiological aspects. Ninety days after trans-planting, plant height, pseudostem diameter, number of leaves, total leaf area, root volume, total dry mass, total content of chlorophyll, carotenoids, and proline contents, N concentrations and their use efficiency were evaluated. Only strains BR11005 (Azospirillum baldaniorum) and BR12157 (Bacillus velezensis) showed potential to improve the performance of growth-related morphophysiological traits and N use eficiency. The strains are effective for biological N fixation, potassium, and phosphate solubilization, auxin synthesis, and production of siderophores, and hydrolytic enzymes. The performance of plants treated with these strains exceeded those of fertil-ization with 200 mg kg-1 of N treatment.
Palavras-Chave: | Bacillus velezensis; Bioinoculant; Growth-stimulate bacteria; Mineral nutrition; Nitrogen use efficiency.
Categoria do assunto: | S Ciências Biológicas
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (42174-1) - UPC - AP - DD -  -  -  - DIS