OsKinesin-13A is an active microtubule depolymerase involved in glume length regulation via affecting cell elongation.

ABSTRACT: Grain size is an important trait influencing both the yield and quality of rice and its major determinant is glume size. However, how glume size is regulated remains largely unknown. Here, we report the characterization of OsKinesin-13A, which regulates cell elongation and glume length in rice. The mutant of OsKinesin-13A, sar1, displayed length reduction in grains and other organs including internodes, leaves and roots. The grain phenotype in sar1 was directly caused by reduction in glume length, which in turn restricted caryopsis size. Histological results revealed that length decrease in sar1 organs resulted from abnormalities in cell elongation. The orientation of cellulose microfibrils was defective in sar1. Consistently, sar1 showed reduced transverse orientation of cortical microtub

SUBMITTER: Deng ZY 

PROVIDER: S-EPMC4373686 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature