Periodic cytokinin responses in Lotus japonicus rhizobium infection and nodule development.
Science
; 385(6706): 288-294, 2024 Jul 19.
Article
in En
| MEDLINE
| ID: mdl-39024445
ABSTRACT
Host plants benefit from legume root nodule symbiosis with nitrogen-fixing bacteria under nitrogen-limiting conditions. In this interaction, the hosts must regulate nodule numbers and distribution patterns to control the degree of symbiosis and maintain root growth functions. The host response to symbiotic bacteria occurs discontinuously but repeatedly at the region behind the tip of the growing roots. Here, live-imaging and transcriptome analyses revealed oscillating host gene expression with approximately 6-hour intervals upon bacterial inoculation. Cytokinin response also exhibited a similar oscillation pattern. Cytokinin signaling is crucial to maintaining the periodicity, as observed in cytokinin receptor mutants displaying altered infection foci distribution. This periodic regulation influences the size of the root region responsive to bacteria, as well as the nodulation process progression.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Symbiosis
/
Gene Expression Regulation, Plant
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Cytokinins
/
Root Nodules, Plant
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Plant Root Nodulation
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Mesorhizobium
/
Lotus
/
Host Microbial Interactions
Language:
En
Journal:
Science
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: