Os07g0235800
The rice gene Os07g0235800 was reported as snb in 2006[1] by researchers from Korea.
Contents
Annotated Information
Gene Symbol
- Os07g0235800 <=> SNB, OSSNB
Function
- SUPERNUMERARY BRACT (SNB) gene controlling the transition from spikelet meristem to floral meristem and the floral organ development. This gene encodes a putative transcription factor carrying two AP2 domains.
Mutation
Figure 1. Spikelet phenotypes of snb T-DNA knockout mutants and wild-type plants. [1].
- In SNB knockout plants, the transition from spikelet meristems to floral meristems is delayed, resulting in the production of multiple rudimentary glumes in an alternative phyllotaxy. The development of additional bracts interferes with subsequent floral architecture. In some spikelets, the empty glumes and lodicules are transformed into lemma/palea-like organs. Occasionally, the number of stamens and carpels is altered and an ectopic floret occurs in the axil of the rachilla. These phenotypes suggest that snb is a heterochronic mutant, affecting the phase transition of spikelet meristems, the pattern formation of floral organs and spikelet meristem determinancy.
Expression
- SNB is expressed in all the examined tissues, but most strongly in the newly emerging spikelet meristems.
Sublocalization
- The SNB:GFP fusion protein is localized to the nucleus.
Evolution
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Labs working on this gene
- National Research Laboratory of Plant Functional Genomics, Division of Molecular and Life Sciences, Pohang University of Science and Technology (POSTECH), Pohang 790-784, Korea
References
