Role of rice PPS in late vegetative and reproductive growth.
The rice peter pan syndrome-1 (pps-1) mutant shows a prolonged juvenile phase and early flowering. Although the early vegetative phase and flowering time of pps-1 have been closely examined, the phenotypes in the late vegetative and reproductive phases are not yet well understood. In the ninth leaf blade of pps-1, the relative length of the midrib was comparable to the sixth leaf blade of wild-type. Moreover, pps-1 had a small inflorescence meristem and small panicles. These phenotypes indicate that in pps-1 the juvenile phase coexists with the late vegetative phase, resulting in small panicles. Gibberellin is known to promote the juvenile-adult phase transition. d18-k is dwarf and has a prolonged juvenile phase. Double mutant (d18-k pps-1) showed the same phenotype as the pps-1, indicating that PPS is upstream of GA biosynthetic genes.
Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan.
Nobuhiro
N
Tanaka
Jun-Ichi
J
Itoh
Yasuo
Y
Nagato
D012275:Oryza / Q000235:genetics / Q000254:growth & development*; D010641:Phenotype; D018515:Plant Leaves / Q000254:growth & development; D010940:Plant Proteins / Q000502:physiology*
D010940:Plant Proteins