Summary Statement
Pollen coat lipids play essential roles in pollen-stigma interaction.
Mutation of tapetal-derived KCS proteins (KCS7, KCS15 and KCS21) affects
pollen hydration and tube growth. A critical point of tapetal-derived
lipids in pollen coat is required for pollen hydration.
Key words: pollen coat, lipid, 3-ketoacyl-coenzyme A synthase,
pollen hydration