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Plant hormone gibberellin (GA) promotes juvenile-adult phase change in higher plants. To confirm the functions of GA in rice, I used dwarf mutant  d18-dy .  d18-dy  is a loss-of-function allele of  D18 , which encodes  GA3ox2 .  d18-dy  mutant exhibited long juvenile phase in morphological traits such as the size of the shoot apical meristem (SAM), shape of leaf blades, presence or absence of midribs and node–internode differentiation in stem. In contrast, expression patterns of juvenile-adult phase change markers  miR156  and  miR172  were similar between wild type and  d18-dy . In addition,  d18-dy  mutation and GA did not affect expression levels of downstream genes of  miR156 . GA does not function upstream of  miR156  in juvenile-adult phase change.   Electronic supplementary material  The online version of this article (doi:10.1186/1939-8433-5-25) contains supplementary material, which is available to authorized users.

Gibberellin is not a regulator of miR156 in rice juvenile-adult phase change