Required for the formation of pollen coats and male fertility. Localized in small granules in the tapetal cells. Flower buds and pollen. Strongly expressed in tapetal cells at the flower developmental stage 10 to middle 12, where the components of pollen coat are synthesized actively. Reduced pollen fertility. Pollen grain exhibit a partial formation of coat and impaired water absorption and germination capacities. Belongs to the 'GDSL' lipolytic enzyme family. The predicted gene At1g75930 has been split into 2 genes: At1g75930 and At1g75940.