Data/hora: 04/06/2024 08:15:01

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 19/07/2019
Data da última atualização: | 28/08/2023
Autoria: | PROENÇA, D. N.; SCHWAB, S.; VIDAL, M. S.; BALDANI, J. I.; XAVIER, G. R.; MORAIES, P. V.
Afiliação: | University of Coimbra; STEFAN SCHWAB, CNPAB; MARCIA SOARES VIDAL, CNPAB; JOSE IVO BALDANI, CNPAB; GUSTAVO RIBEIRO XAVIER, CNPAB; University of Coimbra.
Título: | The nematicide Serratia plymuthica M24T3 colonizes Arabidopsis thaliana, stimulates plant growth, and presents plant beneficial potential.
Ano de publicação: | 2019
Fonte/Imprenta: | Brazilian Journal of Microbiology, Epub ahead of print, Published online, jun 2019
Idioma: | Inglês
Conteúdo: | Nine bacterial strains were previously isolated in association with pinewood nematode (PWN) from wilted pine trees. They proved to be nematicidal in vitro, and one of the highest activities, with potential to control PWN, was showed by Serratia sp. M24T3. Its ecology in association with plants remains unclear. This study aimed to evaluate the ability of strain M24T3 to colonize the internal tissues of the model plant Arabidopsis thaliana using confocal microscopy. Plant growth-promoting bacteria (PGPB) functional traits were tested and retrieved in the genome of strain M24T3. In greenhouse conditions, the bacterial effects of all nematicidal strains were also evaluated, co-inoculated or not with Bradyrhizobium sp. 3267, on Vigna unguiculata fitness. Inoculation of strain M24T3 increased the number of A. thaliana lateral roots and the confocal analysis confirmed effective bacterial colonization in the plant. Strain M24T3 showed cellulolytic activity, siderophores production, phosphate and zinc solubilization ability, and indole acetic acid production independent of supplementation with L-tryptophan. In the genome of strain M24T3, genes involved in the interaction with the plants such as 1-aminocyclopropane-1-carboxylate (ACC) deaminase, chitinolytic activity, and quorum sensing were also detected. The genomic organization showed ACC deaminase and its leucine-responsive transcriptional regulator, and the activity of ACC deaminase was 594.6 nmol &#945;-ketobutyrate &#956;g protein-1 &#956;l-1. Strain M24T3 in co-inoculation with Bradyrhizobium sp. 3267 promoted the growth of V. unguiculata. In conclusion, this study demonstrated the ability of strain M24T3 to colonize other plants besides pine trees as an endophyte and displays PGPB traits that probably increased plant tolerance to stresses.
Palavras-Chave: | Deaminase; Endophytic colonization.
Thesaurus Nal: | Arabidopsis thaliana; Genome; Nematode biology; Vigna unguiculata subsp. unguiculata.
Categoria do assunto: | S Ciências Biológicas
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (41194-1) - UPC - AP - DD -  -  -  - DIS