Real time-PCR analysis of mRNA levels of OsCIN1 , OsSUT1 and OsSUT2 in rice immature seeds during callus induction and early shoot organogenesis. (a-c) OsCIN1, OsSUT1 and OsSUT2 levels at days 4, 10 and 14 in CIM. The levels were normalized to that at day 4 in ANT39. (d-f) OsCIN1, OsSUT1 and OsSUT2 levels at days 0, 1, 3 and 5 in RM. Levels were normalized to that at day 0 of ANT39 in RM. Ubiquitin level was used as a reference. Data are mean ± standard error (n=3).