Os06g0138700

The rice Os06g0138700 was reported as DDF1 in 2012 by researchers from China.

Annotated Information

Gene Symbol

• Os06g0138700 <=> OsDDF1,DDF1

Function

• The rice DDF1 encodes an F-box protein.
• DDF1 controls organ size by regulating both cell division and cell expansion.
• DDF1 is a crucial genetic factor with pleiotropic functions for both vegetative growth and floral organ specification in rice.
• DDF1 also negatively regulates the Arabidopsis LFY ortholog APO2, implying a functional connection between DDF1 and APO2.

Phenotypic analysis

• The mutant dwarf and deformed flower 1-1 (ddf1-1) is abnormal in both vegetative and reproductive development, with significant size reduction in all organs except the spikelet.
• In the ddf1-1 spikelet, the specification of floral organs in whorls 2 and 3 is altered, with most lodicules and stamens being transformed into glume-like organs and pistil-like organs, respectively, but the specification of lemma/palea and pistil in whorls 1 and 4 is not affected.
• Consistent with the mutant floral phenotype, DDF1 positively regulates B-class genes OsMADS4 and OsMADS16, and negatively regulates pistil specifica- tion gene DL.

Expression

• DDF1 is expressed in almost all vegetative and reproductive tissues.

Subcellular localization

• Subcellular localizatio analysis showed that DDF1 was anchored in the nucleolus

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Labs working on this gene

• Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture & Forestry University, Fuzhou 350002, China,
• Fujian Provincial Key Laboratory of Molecular Marker-Assisted Breeding of Rice, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China, and
• State Key Laboratory of Molecular Developmental Biology, Institute of Genetics & Developmental Biology, Chinese Academy of Sciences and National Center for Plant Gene Research, Beijing 100101, China