Gene Families from the Arabidopsis thaliana Pollen Coat Proteome

• DOI: 10.1126/science.1060972
• Publication Date: 2002-07-27T09:53:24Z
• Authors: Jacob A. Mayfield; Aretha Fiebig; Sarah E. Johnstone; Daphne Preuss
• Keywords: Proteome; Oleosin

The pollen extracellular matrix contains proteins mediating species specificity and components needed for efficient pollination. We identified all >10 kilodaltons in the Arabidopsis coating showed that most of corresponding genes reside two genomic clusters. One cluster encodes six lipases, whereas other lipid-binding oleosin genes, including GRP17 , a gene promotes Individual oleosins exhibit extensive divergence between ecotypes, but entire remains intact. Analysis syntenic region Brassica oleracea revealed even greater divergence, similar clustering genes. Such allelic flexibility may promote speciation plants.