Mechanisms in plant growth-promoting rhizobacteria that enhance legume-rhizobial symbioses.
J Appl Microbiol
; 129(5): 1133-1156, 2020 Nov.
Article
en En
| MEDLINE
| ID: mdl-32592603
ABSTRACT
Nitrogen fixation is an important biological process in terrestrial ecosystems and for global crop production. Legume nodulation and N2 fixation have been improved using nodule-enhancing rhizobacteria (NER) under both regular and stressed conditions. The positive effect of NER on legume-rhizobia symbiosis can be facilitated by plant growth-promoting (PGP) mechanisms, some of which remain to be identified. NER that produce aminocyclopropane-1-carboxylic acid deaminase and indole acetic acid enhance the legume-rhizobia symbiosis through (i) enhancing the nodule induction, (ii) improving the competitiveness of rhizobia for nodulation, (iii) prolonging functional nodules by suppressing nodule senescence and (iv) upregulating genes associated with legume-rhizobia symbiosis. The means by which these processes enhance the legume-rhizobia symbiosis is the focus of this review. A better understanding of the mechanisms by which PGP rhizobacteria operate, and how they can be altered, will provide opportunities to enhance legume-rhizobial interactions, to provide new advances in plant growth promotion and N2 fixation.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Simbiosis
/
Bacterias
/
Fabaceae
Idioma:
En
Revista:
J Appl Microbiol
Asunto de la revista:
MICROBIOLOGIA
Año:
2020
Tipo del documento:
Article
País de afiliación:
Australia