The B-sister MADS Gene FST Determines Ovule Patterning and Development of the Zygotic Embryo and Endosperm

Title
The B-sister MADS Gene FST Determines Ovule Patterning and Development of the Zygotic Embryo and Endosperm
Author(s)
강상구Lee DS[Lee DS]Chen LJ[Chen LJ]Li CY[Li CY]Liu Y[Liu Y]Tan XL[Tan XL]Li J[Li J]Gan SX[Gan SX]서학수Zhu Y[Zhu Y]
Keywords
FEMALE GAMETOPHYTE DEVELOPMENT; FLORAL ORGAN IDENTITY; GAMETIC CELL FATE; BOX GENES; SEED DEVELOPMENT; FLOWERING PLANTS; DOMAIN PROTEIN; ARABIDOPSIS; RICE; EXPRESSION
Issue Date
201303
Publisher
PUBLIC LIBRARY SCIENCE
Citation
PLOS ONE, v.8, no.3
Abstract
Many homeotic MADS-box genes have been identified as controllers of the floral transition and floral development. However, information regarding B-sister (B-s)-function genes in monocots is still limited. Here, we describe the functional characterization of a B-s-group MADS-box gene FEMALE-STERILE (FST), whose frame-shift mutation (fst) results in abnormal ovules and the complete abortion of zygotic embryos and endosperms in rice. Anatomical analysis showed that the defective development in the fst mutant exclusively occurred in sporophytic tissues including integuments, fertilized proembryos and endosperms. Analyses of the spatio-temporal expression pattern revealed that the prominent FST gene products accumulated in the inner integument, nucellar cell of the micropylar side, apical and base of the proembryos and free endosperm nuclei. Microarray and gene ontology analysis unraveled substantial changes in the expression level of many genes in the fst mutant ovules and seeds, with a subset of genes involved in several developmental and hormonal pathways appearing to be down-regulated. Using both forward and reverse genetics approaches, we demonstrated that rice FST plays indispensable roles and multiple functions during ovule and early seed development. These findings support a novel function for the B-s-group MADS-box genes in plants.
URI
http://hdl.handle.net/YU.REPOSITORY/26271http://dx.doi.org/10.1371/journal.pone.0058748
ISSN
1932-6203
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생명공학부 > 생명공학부 > Articles
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