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Overexpression of rice LRK1 restricts internode elongation by down-regulating OsKO2

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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.

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Acknowledgments

This research was supported by the Genetically Modified Organisms Breeding Major Projects of China (Grant No. 2009ZX08001-028B).

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Authors and Affiliations

  1. State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Sciences, Fudan University, 220 Handan Road, Shanghai, 200433, China

    Mengfei Yang, Weiwei Qi, Fan Sun, Xiaojun Zha, Jinshui Yang & Xiaojin Luo

  2. Key Laboratory of Analytical Chemistry for Biology and Medicine, Department of Chemistry, Wuhan University, Wuhan, 430072, China

    Mingluan Chen, Yunqing Huang & Yu-Qi Feng

Authors
  1. Mengfei Yang
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  2. Weiwei Qi
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  3. Fan Sun
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  4. Xiaojun Zha
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  5. Mingluan Chen
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  6. Yunqing Huang
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  7. Yu-Qi Feng
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  8. Jinshui Yang
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  9. Xiaojin Luo
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Corresponding author

Correspondence to Xiaojin Luo.

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Mengfei Yang and Weiwei Qi contributed equally to this work.

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Yang, M., Qi, W., Sun, F. et al. Overexpression of rice LRK1 restricts internode elongation by down-regulating OsKO2 . Biotechnol Lett 35, 121–128 (2013). https://doi.org/10.1007/s10529-012-1054-9

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  • DOI: https://doi.org/10.1007/s10529-012-1054-9

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