Bradyrhizobium sp. strain ORS278 promotes rice growth and its quorum sensing system is required for optimal root colonization.
Journal
Environmental microbiology reports
ISSN: 1758-2229
Titre abrégé: Environ Microbiol Rep
Pays: United States
ID NLM: 101499207
Informations de publication
Date de publication:
12 2020
12 2020
Historique:
received:
10
04
2020
accepted:
10
09
2020
pubmed:
16
9
2020
medline:
25
5
2021
entrez:
15
9
2020
Statut:
ppublish
Résumé
Many Gram-negative bacteria communicate by using homoserine lactones (HSLs) as quorum sensing (QS) signals in a cell density-dependent manner. In addition to fatty acyl-HSL (acyl-HSL) signals, certain strains, most of them associated with plants, produce non-canonical aryl-HSLs such as cinnamoyl-HSL. However, the role of aryl-HSL in endophytic associations remained elusive. Bradyrhizobium sp. strain ORS278 possesses a LuxI-LuxR type QS system and produces cinnamoyl-HSL as a QS signal. Here, we report that strain ORS278 promotes growth of domesticated rice (Oryza sativa). QS mutants unable to produce cinnamoyl-HSL exhibited reduced plant-growth promoting activity in comparison to the parent strain ORS278. Likewise, the QS mutants were impaired in their ability to colonize rice roots. These findings suggest that genes controlled by cinnamoyl-HSL play an important role in the association between rice and ORS278. However, biofilm production was not visibly altered in these mutants. In conclusion, our study highlights the importance of aryl-HSLs in endophytic plant-bacteria interactions.
Identifiants
pubmed: 32929871
doi: 10.1111/1758-2229.12885
doi:
Substances chimiques
Bacterial Proteins
0
homoserine lactone
1192-20-7
4-Butyrolactone
OL659KIY4X
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
656-666Subventions
Organisme : Guangdong Province Science and Technology Innovation Strategy Special Fund
ID : 2018B020206001
Pays : International
Organisme : National Natural Science Foundation of China
ID : 31771341
Pays : International
Informations de copyright
© 2020 Society for Applied Microbiology and John Wiley & Sons Ltd.
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