1 The microsporogenesis 1.2 The formation of microsporangium(小孢囊) 1.2.1 Wall layers(药壁) ●Epidermis(表皮) Endothecium(药室内壁) Middle layers(中层) Tapetum(绒毡层) 16
16 1 The microsporogenesis 1.2 The formation of microsporangium(小孢囊) 1.2.1 Wall layers(药壁) ● Epidermis(表皮) ● Endothecium(药室内壁) ● Middle layers(中层) ● Tapetum(绒毡层)
●Epidermis Amaryllidaceae,Anacardiaceae,Araceae, Balanophoraceae,Begoniaceae, Canellaceae,Degeneriaceae,Gramineae, Lauraceae,Liliaceae,Magnoliaceae, Trochodendraceae(see Bhandari 1971, Davis 1966),and Winteraceae. Epidermis is single layer,remain intact. 17
17 ● Epidermis Amaryllidaceae, Anacardiaceae, Araceae, Balanophoraceae, Begoniaceae, Canellaceae, Degeneriaceae, Gramineae, Lauraceae, Liliaceae, Magnoliaceae, Trochodendraceae(see Bhandari 1971, Davis 1966),and Winteraceae. Epidermis is single layer, remain intact
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●Epidermis Cannabinaceae,Moraceae, Ulmaceae,Drostenia,and Broussonetia (see Eames 1961). The epidermal cells may become stretched,compressed,scattered,or completely sloughed off during the course of maturation of anther. 19
19 ● Epidermis Cannabinaceae, Moraceae, Ulmaceae, Drostenia, and Broussonetia (see Eames 1961). The epidermal cells may become stretched, compressed, scattered, or completely sloughed off during the course of maturation of anther
Epidermis Aristlochia,Calycanthus, Chelone glabra The anther are covered all over by hairs of epidermal origin. Arceuthobium:The epidermis develops flbrous bands like the of endothecium, and is termed exothecium. 20
20 ● Epidermis Aristlochia, Calycanthus, Chelone glabra The anther are covered all over by hairs of epidermal origin. Arceuthobium: The epidermis develops flbrous bands like the of endothecium, and is termed exothecium