Arabidopsis GLAUCE promotes fertilization-independent endosperm development and expression of paternally inherited alleles.

摘要: Early seed development of sexually reproducing plants requires both maternal and paternal genomes but is prominently maternally influenced. A novel gametophytic maternal-effect mutant defective in early embryo endosperm development, glauce (glc), has been isolated from a population Arabidopsis Ds transposon insertion lines. The glc mutation results deletion at the site, molecular identity GLC not known. embryos can develop up to globular stage absence central cells appear be unfertilized. suppresses autonomous observed fertilization-independent (fis) class mutants. also epistatic mea, one fis mutants, fertilized seeds, essential for biparental embryonic expression PHE1, repressed downstream target MEA. In addition, function required ribosome protein gene RPS5a AMP deaminase FAC1, which are development. These indicate that factors derived female gametophyte activate subset genome seeds.