Claim · model-written summary
Grand Rapids lettuce germinated in response to nanomolar KAR1.
- Taxon
- Lettuce
Lactuca sativae0 - Material
- cv. Grand Rapidse0
- Treatment
- nanomolar karrikinolide (KAR1)e0
- Outcome
- germinatese0
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce (Lactuca sativa) cv. Grand Rapids germinates in response to nanomolar karrikinolide (KAR1).”
Title
Stephanie E Martinez; Caitlin E Conn; Angelica M Guercio; et al. PLANT PHYSIOLOGY 2022. doi:10.1093/plphys/kiac328
Other claims from this paper (12)
- Intervention effect Lettuce was less responsive to KAR2 than to KAR1.
- Intervention effect Lettuce was less responsive to rac-GR24 than to KAR1.
- Observation The lettuce genome contains two KAI2 copies.
- Observation LsKAI2b was more highly expressed than LsKAI2a in dry achenes and early imbibition.
- Intervention effect An LsKAI2b transgene conferred robust KAR1 responses in Arabidopsis.
- Intervention effect An LsKAI2a transgene did not confer robust KAR1 responses in Arabidopsis.
- Mechanism The authors infer that LsKAI2b likely mediates KAR1 responses in lettuce.
- Observation KAI2 pocket residues 96, 124, 139 and 161 were candidate determinants of ligand specificity.
- Observation Almost all surveyed KAI2 proteins carried Tyr or Phe at residue 124.
- Observation Y124-type KAI2 genes were more broadly distributed in asterids than F124-type genes.
- Intervention effect Substituting four KAI2 residues in Arabidopsis produced diverse responses to three ligands.
- Mechanism The authors suggest diverse KAI2 ligand preferences could evolve through few mutations.