Gene Details:

• MSU gene ID: LOC_Os05g31040
• RAPdb gene ID: Os05g0374200
• Gene Symbol: OsCKX9
• Genome: MSU7 ,  IRGSP-1.0
• Species: Oryza sativa

Functional Descriptions:

• Here we show that the cytokinin (CK) content is dramatically increased in shoot bases of the rice SL signaling mutant d53 By examining transcript levels of all the CK metabolism-related genes after treatment with SL analog GR24, we identified CYTOKININ OXIDASE/DEHYDROGENASE 9 (OsCKX9) as a primary response gene significantly up-regulated within 1 h of treatment in the wild type but not in d53 We also found that OsCKX9 functions as a cytosolic and nuclear dual-localized CK catabolic enzyme, and that the overexpression of OsCKX9 suppresses the browning of d53 calli.
• Both the CRISPR/Cas9-generated OsCKX9 mutants and OsCKX9-overexpressing transgenic plants showed significant increases in tiller number and decreases in plant height and panicle size, suggesting that the homeostasis of OsCKX9 plays a critical role in regulating rice shoot architecture.

Function-related keywords:

• shoot ,  panicle ,  tiller ,  cytokinin ,  architecture ,  homeostasis ,  height ,  plant-height ,  panicle-size ,  tiller-number ,  shoot-architecture

Literature:

• Strigolactone promotes cytokinin degradation through transcriptional activation of CYTOKININ OXIDASE/DEHYDROGENASE 9 in rice .  DOI:  10.1073/pnas.1810980116 ;  PMID:  31235564

Related News:

Gene Resources:

• NCBI ID:
• UniProt accessions:

Sequences: