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The role of CLAVATA signalling in the negative regulation of mycorrhizal colonization and nitrogen response of tomato
- Source :
- Journal of experimental botany. 72(5)
- Publication Year :
- 2020
-
Abstract
- Plants form mutualistic nutrient-acquiring symbioses with microbes, including arbuscular mycorrhizal fungi. The formation of these symbioses is costly, and plants employ a negative feedback loop termed autoregulation of mycorrhizae (AOM) to limit formation of arbuscular mycorrhizae (AM). We provide evidence for the role of one leucine-rich repeat receptor-like kinase (FAB), a hydroxyproline O-arabinosyltransferase enzyme (FIN), and additional evidence for one receptor-like protein (SlCLV2) in the negative regulation of AM formation in tomato. Reciprocal grafting experiments suggest that the FAB gene acts locally in the root, while the SlCLV2 gene may act in both the root and the shoot. External nutrients including phosphate and nitrate can also strongly suppress AM formation. We found that FAB and FIN are required for nitrate suppression of AM but are not required for the powerful suppression of AM colonization by phosphate. This parallels some of the roles of legume homologues in the autoregulation of the more recently evolved symbioses with nitrogen-fixing bacteria leading to nodulation. This deep homology in the symbiotic role of these genes suggests that in addition to the early signalling events that lead to the establishment of AM and nodulation, the autoregulation pathway might also be considered part of the common symbiotic toolkit that enabled plants to form beneficial symbioses.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Physiology
Nitrogen
Plant Science
01 natural sciences
Plant Roots
03 medical and health sciences
chemistry.chemical_compound
Symbiosis
Solanum lycopersicum
Mycorrhizae
Autoregulation
Colonization
Gene
biology
Kinase
fungi
Fabaceae
Phosphate
biology.organism_classification
Cell biology
030104 developmental biology
chemistry
Shoot
Bacteria
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14602431
- Volume :
- 72
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Journal of experimental botany
- Accession number :
- edsair.doi.dedup.....12c3222527009f930057bc004a38cf2e