Coordinated Regulation of the Genes Participating in Starch Biosynthesis by the Rice Floury-2 Locus.
AUTOR(ES)
Kawasaki, T.
RESUMO
The recessive floury-2 (flo-2) locus of rice (Oryza sativa L.), which is located on chromosome 4, causes a strong reduction in expression of the gene encoding an isoform of branching enzyme RBE1 in immature seeds 10 d after flowering. Mapping of the RBE1 gene demonstrated the localization on rice chromosome 6, suggesting that the wild-type Floury-2 (Flo-2) gene regulates RBE1 gene expression in trans. However, reduced expression of the genes encoding some other starch-synthesizing enzymes, including another isoform of branching enzyme RBE3 and granule-bound starch synthase, was also found in the flo-2 seeds. In spite of the low level of RBE1 gene expression in the immature seeds of the flo-2 mutants, the RBE1 gene was equally expressed in the leaves of the wild type and flo-2 mutants. Thus, these results imply that the Flo-2 gene may co-regulate expression of some of the genes participating in starch synthesis possibly in a developing seed-specific manner.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=157697Documentos Relacionados
- Influence of Opaque-2 and Floury-2 Genes on Formation of Proteins in Particulates of Corn Endosperm
- Characterization of an immunoglobulin binding protein homolog in the maize floury-2 endosperm mutant.
- Ribonuclease Activity in Normal, opaque-2, and floury-2 Maize Endosperm during Development 1
- A defective signal peptide tethers the floury-2 zein to the endoplasmic reticulum membrane.
- Regulation of daunorubicin production in Streptomyces peucetius by the dnrR2 locus.