1 The microsporogenesis 1.1 Introduction 1.2 The formation of microsporangium 1.2.1 Wall layers:Epidermis, Endothecium,Middle layers,Tapetum 1.2.2 Microsprocyte 1.3 The formation of microspore 22 1 The microsporogenesis 1.1 Introduction 1.2 The formation of microsporangium 1.2.1 Wall layers: Epidermis, Endothecium, Middle layers,Tapetum 1.2.2 Microsprocyte 1.3 The formation of microspore