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FLOURY ENDOSPERM15 encodes a glyoxalase I involved in compound granule formation and starch synthesis in rice endosperm.
- Source :
-
Plant Cell Reports . Mar2019, Vol. 38 Issue 3, p345-359. 15p. - Publication Year :
- 2019
-
Abstract
- Key message: FLO15encodes a plastidic glyoxalase I protein, OsGLYI7, which affects compound starch granule formation and starch synthesis in rice endosperm.Abstract: Starch synthesis in rice (Oryza sativa) endosperm is a sophisticated process, and its underlying molecular machinery still remains to be elucidated. Here, we identified and characterized two allelic rice floury endosperm 15 (flo15) mutants, both with a white-core endosperm. The flo15 grains were characterized by defects in compound starch granule development, along with decreased starch content. Map-based cloning of the flo15 mutants identified mutations in OsGLYI7, which encodes a glyoxalase I (GLYI) involved in methylglyoxal (MG) detoxification. The mutations of FLO15/OsGLYI7 resulted in increased MG content in flo15 developing endosperms. FLO15/OsGLYI7 localizes to the plastids, and the in vitro GLYI activity derived from flo15 was significantly decreased relative to the wild type. Moreover, the expression of starch synthesis-related genes was obviously altered in the flo15 mutants. These findings suggest that FLO15 plays an important role in compound starch granule formation and starch synthesis in rice endosperm. [ABSTRACT FROM AUTHOR]
- Subjects :
- *GLYOXALASE
*RICE
*ENDOSPERM
*AMYLOPLASTS
*STARCH synthesis
*PYRUVALDEHYDE
Subjects
Details
- Language :
- English
- ISSN :
- 07217714
- Volume :
- 38
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Plant Cell Reports
- Publication Type :
- Academic Journal
- Accession number :
- 134831001
- Full Text :
- https://doi.org/10.1007/s00299-019-02370-9