Synthesis time of storage proteins in rice endosperm

The proteins in rice endosperm were almost storage proteins which were composed with protein body type Ⅰ (PB-Ⅰ) and protein body type Ⅱ (PB-Ⅱ). PB-Ⅰ was composed mainly with prolamin, and PB-Ⅱ was glutelin and globulin. Investigation was on the synthesis time of the storage proteins in rice endosperm using by SDS-PAGE. The storage proteins of japonica variety ‘Kinmaze’ were synthesized from 9 days after flowering(DAF), and that of indica variety ‘IR 36’ did from 6 DAF. The endosperm mutants : esp-1, esp-2, and esp-3 that derived from ‘Kinmaze’ by MNU treatment showed not significant difference in the synthesis time of the storage proteins compared with ‘Kinmaze’. And PB-Ⅱ was synthesized faster than PB-Ⅰ in this investigation.