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Plant Mol Biol. 2008 Oct;68(3):239-50. doi: 10.1007/s11103-008-9365-x. Epub 2008 Jul 2.

ROLLED LEAF 9, encoding a GARP protein, regulates the leaf abaxial cell fate in rice.

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The Key Laboratory of Plant Functional Genomics, Ministry of Education of China, Jiangsu Key Laboratory of Crop Genetics and Physiology, Agricultural College of Yangzhou University, 12 East Wenhui Road, Jiangsu 225009, People's Republic of China.


Leaves, the collective organ produced by the shoot apical meristem (SAM), are polarized along their adaxial-abaxial axis. In this study, we characterized two rice (Oryza sativa) allelic rolled-leaf mutants, rolled leaf 9-1 (rl9-1) and rl9-2, which display very similar phenotypes with completely adaxialized leaves and malformed spikelets. We cloned the RL9 gene by way of a map-based cloning strategy. Molecular studies have revealed that RL9 encodes a GARP protein, an orthologue of Arabidopsis KANADIs. RL9 is mainly expressed in roots, leaves, and flowers. The transient expression of a RL9-GFP (green fluorescent protein) fusion protein has indicated that RL9 protein is localized in the nucleus, suggesting that RL9 acts as a putative transcription factor.

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