Identification and genomic analysis of antifungal property of a tomato root endophyte Pseudomonas sp. p21.
Antonie Van Leeuwenhoek
; 110(3): 387-397, 2017 Mar.
Article
in En
| MEDLINE
| ID: mdl-28000056
ABSTRACT
Pseudomonas sp., which occupy a variety of ecological niches, have been widely studied for their versatile metabolic capacity to promote plant growth, suppress microbial pathogens, and induce systemic resistance in plants. In this study, a Pseudomonas sp. strain p21, which was isolated from tomato root endophytes, was identified as having antagonism against Aspergillus niger. Further analysis showed that this strain had the ability to biosynthesise siderophores and was less effective in inhibiting the growth of A. niger with the supplementation of Fe3+ in the agar medium. Genomic sequencing and the secondary metabolite cluster analysis demonstrated that Pseudomonas sp. p21 harboured 2 pyoverdine biosynthetic gene clusters, which encode compounds with predicted core structures and two variable tetra-peptide or eleven-peptide chains. The results indicated that siderophore-mediated competition for iron might be an important mechanism in Pseudomonas suppression of the fungal pathogen A. niger and in microbe-pathogen-plant interactions.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Pseudomonas
/
Solanum lycopersicum
/
Endophytes
Type of study:
Diagnostic_studies
/
Prognostic_studies
Language:
En
Journal:
Antonie Van Leeuwenhoek
Year:
2017
Type:
Article
Affiliation country:
China