DPW

| Categories genes  | Tags sterile  microspore  anther  tapetal  pollen  anther development  grain  cuticle  cutin 
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  • Key message
    • We report here the isolation and characterization of a rice (Oryza sativa) male-sterile mutant, defective pollen wall (dpw), which displays defective anther development and degenerated pollen grains with an irregular exine
    • Moreover, we demonstrate that the monocot DPW from rice complements the dicot Arabidopsis thaliana male sterile2 (ms2) mutant and is the probable ortholog of MS2
    • Using map-based cloning, we identified the DPW gene, which is expressed in both tapetal cells and microspores during anther development
    • Chemical analysis revealed that dpw anthers had a dramatic reduction in cutin monomers and an altered composition of cuticular wax, as well as soluble fatty acids and alcohols
    • These data suggest that DPWs participate in a conserved step in primary fatty alcohol synthesis for anther cuticle and pollen sporopollenin biosynthesis in monocots and dicots
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