- Information
- Symbol: KRP1
- MSU: LOC_Os02g52480
- RAPdb: Os02g0762400
- Publication
- Genbank accession number
- Key message
- Phenotypic analysis revealed that overexpressed KRP1 reduced cell production during leaf development
- The cyclin-dependent kinase inhibitor Orysa;KRP1 plays an important role in seed development of rice
- Also, spatial and temporal transcript detection in developing seeds suggests that Orysa;KRP1 plays an important role in the exit from the mitotic cell cycle during rice grain formation
- However, phyB mutants exhibited reduced total leaf area per plant, which was probably due to a reduction in the total number of cells per leaf caused by enhanced expression of Orysa;KRP1 and Orysa;KRP4 (encoding inhibitors of cyclin-dependent kinase complex activity) in the phyB mutants
- Sectioning through the overexpressed KRP1 seeds showed that KRP overproduction disturbed the production of endosperm cells
- The decrease in the number of fully formed seeds was accompanied by a drop in the endoreduplication of endosperm cells, pointing toward a role of KRP1 in connecting endocycle with endosperm development
- Furthermore, Orysa;KRP1 overexpression dramatically reduced seed filling
- Connection
- KRP1, PHYB~OsphyB, Phytochrome B control of total leaf area and stomatal density affects drought tolerance in rice, However, phyB mutants exhibited reduced total leaf area per plant, which was probably due to a reduction in the total number of cells per leaf caused by enhanced expression of Orysa;KRP1 and Orysa;KRP4 (encoding inhibitors of cyclin-dependent kinase complex activity) in the phyB mutants
- KRP1, KRP2, Cyclin-Dependent Kinase Inhibitors KRP1 and KRP2 Are Involved in Grain Filling and Seed Germination in Rice Oryza sativa L.., Cyclin-Dependent Kinase Inhibitors KRP1 and KRP2 Are Involved in Grain Filling and Seed Germination in Rice (Oryza sativa L.).
- KRP1, KRP2, Cyclin-Dependent Kinase Inhibitors KRP1 and KRP2 Are Involved in Grain Filling and Seed Germination in Rice Oryza sativa L.., In this study, two rice KRPs members, KRP1 and KRP2, were found to be predominantly expressed in developing seeds and were significantly induced by exogenous abscisic acid (ABA) and Brassinosteroid (BR) applications
- KRP1, KRP2, Cyclin-Dependent Kinase Inhibitors KRP1 and KRP2 Are Involved in Grain Filling and Seed Germination in Rice Oryza sativa L.., KRP1 overexpression transgenic lines (OxKRP1), krp2 single mutant (crkrp2), and krp1/krp2 double mutant (crkrp1/krp2) all exhibited significantly smaller seed width, seed length, and reduced grain weight, with impaired seed germination and retarded early seedling growth, suggesting that disturbing the normal steady state of KRP1 or KRP2 blocks seed development partly through inhibiting cell proliferation and enlargement during grain filling and seed germination
- KRP1, TGW2, Natural variation in the promoter of TGW2 determines grain width and weight in rice., TGW2 interacts with KRP1, a regulator of cell cycle in plant, to negatively regulate grain width and weight
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