《植物生殖生物学》课程教学资源（课件讲稿）Biology of pollen development（PPT）

Chapter I Biology of pollen development 1 The microsporogenesis 2 The development of microspore

1 Chapter I Biology of pollen development 1 The microsporogenesis 2 The development of microspore

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 2

2 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

1 The microsporogenesis 1.1 Introduction 1.1.1 Flowering plant reproduction 1.1.2 Morpholgy and structure of anther 3

3 1 The microsporogenesis 1.1 Introduction 1.1.1 Flowering plant reproduction 1.1.2 Morpholgy and structure of anther

Sporophyte Gametophytes 4

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Petal Diploid Haploid Stigma Pistil Anthers Style- (micto. Stamen Ovary sporangia） Filament Ovule Receptacle Many microsporocytes in microsporangium 5

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Petal Microsporangium Stigma Microspores Anther Tapetum Filament. Style Stamen Anther- Carpel Sepal Filament 6

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Meiosis Microspore Wall development Pollen grain Mitosis Pollen germination Sperm nuclei Tube nucleus 7

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Megaspore mother cell Meiosis Antipodal Micropyle Polar Surviving nuclei megaspore 。0 Synergid /Egg Embryo sac Integuments Micropyle Antipodal cells (3) Rearrangement of nuclei Polar nuclei (2) Egg (arge) Synergid cells 8

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Endosperm nucleus (from 3 nuclei) Pollen Zygote germination (from 2 nuclei) Growth of Nuclear fusion pollen tube within embryo toward sac female gametophyte Pollen tube 9

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Three antipodal cells Pollen tube Generative nucleus Tube nucleus Polar nuclei Egg Synergids Sperm nuclei 10

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