SPL基因被C功能蛋白AG激活 En ML SPC 一T Ms PSC Stage 4 Stage 5 Secondary Primary Endothecium (En) Parietal Cell(sPc Parietal Cell (PPc) Secondary Middle Layer ( Ml) Primary Parietal Cell(SPC Tapetum (T) Sporogenous cell Microsporocytes(Ms) (PSC) AG- SPL Ito et aL. 2004Microsporocytes (Ms) Parietal Cell (SPC) Sporogenous Cell (PSC) Primary Primary Parietal Cell (PPC) Secondary Secondary Parietal Cell (SPC) Stage 4 E SPC PSC Endothecium (En) Middle Layer (ML) Tapetum (T) Stage 5 E En ML T Ms AG SPL Ito et al., 2004 SPL 基因被C功能蛋白AG激活