Expression Patterns of OsPIL11,a Phytochrome-Interacting Factor in Rice,and Preliminary Analysis of Its Roles in Light Signal Transduction

The expression patterns of OsPIL11,one of six putative phytochrome-interacting factors,were analyzed in different organs of transgenic tobacco(Nicotiana tabacum).The expression of OsPIL11 was organ-specific and was regulated by leaf development,abscisic acid(ABA),jasmonic acid(JA) and salicylic acid(SA).To further explore the role of OsPIL11 in plant light signal transduction,a plant expression vector of OsPIL11 was constructed and introduced into tobacco.When grown under continuous red light,OsPIL11-overexpressed transgenic tobacco exhibited shorter hypocotyls and larger cotyledons and leaves compared to wild-type seedlings.When grown under continuous far-red light,however,transgenic and wild-type seedlings showed similar phenotypes.These results indicate that OsPIL11 is involved in red light induced de-etiolation,but not in far-red light induced de-etiolation in transgenic tobacco,which lays the foundation for dissecting the function of OsPIL11 in phytochrome-mediated light signal transduction in rice.