图7. OsPKS1和OsPKS2在花药外壁和花粉外壁发育过程中的作用
Polyketide：聚酮化合物;Cutin Monomers：角质单体;Sporopollenin Precursor：孢粉素前体;Anther Cuticle：花药角质层;Pollen wall：花粉外壁。OsACOS12催化不同的脂肪酸形成脂肪酰辅酶A,形成的脂肪酰辅酶A继续被OsPKS1或OsPKS2催化形成不同类型的聚酮化合物,不同类型的聚酮化合物分别参与角质单体和孢粉素前体的形成,继而参与乌氏体和花粉外壁不同结构的形成,聚酮化合物也参与花药角质层的发育

Fig. 7. The proposed roles of OsPKS1 and OsPKS2 in anther cuticle and pollen wall development
OsACOS12 catalyzes diverse fatty acids to produce fatty acyl coenzyme A which is then condensed by OsPKS1 or OsPKS2 to form different types of polyketide. Different types of polyketide involved in the formation of cutin monomers and sporopollenin precursor are required for the different structures in Ubisch body and pollen wall formation and also participate in the development of anther cuticle