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Molecular Plant Advance Access published online on May 18, 2009
Molecular Plant, doi:10.1093/mp/ssp023
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© The Author 2009. Published by the Molecular Plant Shanghai Editorial Office in association with Oxford University Press on behalf of CSPP and IPPE, SIBS, CAS.

Expression of PIN Genes in Rice (Oryza sativa L.): Tissue Specificity and Regulation by Hormones

Ji-Rong Wang2, Han Hu2, Gao-Hang Wang2, Jing Li, Jie-Yu Chen and Ping Wu1

State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zi Jin Gang Campus, Zhejiang University, Hangzhou, 310058, People's Republic of China

1 To whom correspondence should be addressed. E-mail clspwu{at}zju.edu.cn, fax 86-571-88206177.

Twelve genes of the PIN family in rice were analyzed for gene and protein structures and an evolutionary relationship with reported AtPINs in Arabidopsis. Four members of PIN1 (designated as OsPIN1a–d), one gene paired with AtPIN2 (OsPIN2), three members of PIN5 (OsPIN5a–c), one gene paired with AtPIN8 (OsPIN8), and three monocot-specific PINs (OsPIN9, OsPIN10a, and b) were identified from the phylogenetic analysis. Tissue-specific expression patterns of nine PIN genes among them were investigated using RT–PCR and GUS reporter. The wide variations in the expression domain in different tissues of the PIN genes were observed. In general, PIN genes are up-regulated by exogenous auxin, while different responses of different PIN genes to other hormones were found.

Key Words: Oryza sativa L. • PIN family • expression pattern

2 These authors have contributed equally to this work.


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