title: Overexpression of rice LRK1 restricts internode elongation by down-regulating OsKO2.
abstract: Rice (Oryza sativa) has the potential to undergo rapid internodal elongation which determines plant height. Gibberellin is involved in internode elongation. Leucine-rich repeat receptor-like kinases (LRR-RLKs) are the largest subfamily of transmembrane receptor-like kinases in plants. LRR-RLKs play important functions in mediating a variety of cellular processes and regulating responses to environmental signals. LRK1, a PSK receptor homolog, is a member of the LRR-RLK family. In the present study, differences in ectopic expression of LRK1 were consistent with extent of rice internode elongation. Analyses of gene expression demonstrated that LRK1 restricts gibberellin biosynthesis during the internode elongation process by down-regulation of the gibberellin biosynthetic gene coding for ent-kaurene oxidase.
authors.affiliation: State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai, China. banmatus@gmail.com
authors.forename: Mengfei
authors.initials: M
authors.lastname: Yang
authors.forename: Weiwei
authors.initials: W
authors.lastname: Qi
authors.forename: Fan
authors.initials: F
authors.lastname: Sun
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Zha
authors.forename: Mingluan
authors.initials: M
authors.lastname: Chen
authors.forename: Yunqing
authors.initials: Y
authors.lastname: Huang
authors.forename: Yu-Qi
authors.initials: YQ
authors.lastname: Feng
authors.forename: Jinshui
authors.initials: J
authors.lastname: Yang
authors.forename: Xiaojin
authors.initials: X
authors.lastname: Luo
mesh_terms: D003577:Cytochrome P-450 Enzyme System / Q000032:analysis / Q000235:genetics* / Q000378:metabolism; D015536:Down-Regulation; D018506:Gene Expression Regulation, Plant; D005875:Gibberellins / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D020411:Oligonucleotide Array Sequence Analysis; D012275:Oryza / Q000235:genetics* / Q000254:growth & development* / Q000378:metabolism; D010641:Phenotype; D010940:Plant Proteins / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D030821:Plants, Genetically Modified; D011494:Protein Kinases / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis / Q000378:metabolism; D012639:Seeds / Q000235:genetics / Q000254:growth & development; D015398:Signal Transduction
chemical_list: D005875:Gibberellins; D010940:Plant Proteins; D012333:RNA, Messenger; D003577:Cytochrome P-450 Enzyme System; C066398:ent-kaurene oxidase; D011494:Protein Kinases