Du1, encoding a novel Prp1 protein, regulates starch biosynthesis through affecting the splicing of Wx b pre-mRNAs in rice (Oryza sativa L.)

Du1, encoding a novel Prp1 protein, regulates starch biosynthesis through affecting the splicing... Starch is the major component of cereal grains. In rice, starch properties determine the eating and cooking quality. The dull endosperm of rice grains is a classical morphological and agronomical trait that has long been exploited for breeding and genetics study. To understand the molecular mechanism that regulates the starch biosynthesis in rice grains, we characterized a classic rice mutant dull endosperm1 (du1) and isolated Du1 through a map-based cloning approach. Du1, encoding a member of pre-mRNA processing (Prp1) family, is expressed mainly in panicles. Du1 specifically affects the splicing efficiency of Wx b and regulates starch biosynthesis by mediating the expression of starch biosynthesis genes. Analysis of du1wx shows that Du1 acts upstream of Wx b . These results strongly suggest that Du1 may function as a regulator of the starch biosynthesis by affecting the splicing of Wx b and the expression of other genes involved in the rice starch biosynthetic pathways. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Molecular Biology Springer Journals

Du1, encoding a novel Prp1 protein, regulates starch biosynthesis through affecting the splicing of Wx b pre-mRNAs in rice (Oryza sativa L.)

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Publisher
Springer Netherlands
Copyright
Copyright © 2007 by Springer Science+Business Media B.V.
Subject
Life Sciences; Plant Pathology; Biochemistry, general; Plant Sciences
ISSN
0167-4412
eISSN
1573-5028
D.O.I.
10.1007/s11103-007-9186-3
Publisher site
See Article on Publisher Site

Abstract

Starch is the major component of cereal grains. In rice, starch properties determine the eating and cooking quality. The dull endosperm of rice grains is a classical morphological and agronomical trait that has long been exploited for breeding and genetics study. To understand the molecular mechanism that regulates the starch biosynthesis in rice grains, we characterized a classic rice mutant dull endosperm1 (du1) and isolated Du1 through a map-based cloning approach. Du1, encoding a member of pre-mRNA processing (Prp1) family, is expressed mainly in panicles. Du1 specifically affects the splicing efficiency of Wx b and regulates starch biosynthesis by mediating the expression of starch biosynthesis genes. Analysis of du1wx shows that Du1 acts upstream of Wx b . These results strongly suggest that Du1 may function as a regulator of the starch biosynthesis by affecting the splicing of Wx b and the expression of other genes involved in the rice starch biosynthetic pathways.

Journal

Plant Molecular BiologySpringer Journals

Published: Jun 20, 2007

References

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