Chap 14 Ayo Life Science 2010 chap 14

Chap. 14 植物繁殖和發展 鄭先祐(Ayo) 製作 Life Science 2010 chap. 14 Plant reproduction

Reproduction and Life cycles in various plants s s s Alternation of generations (世代交替) gametophyte → gametes → sporophyte (2 N) green algae (綠藻) (Fig. 14. 1) moss 苔蘚類 (Fig. 14. 2) Fern 蕨類 (Fig. 14. 3) pine tree 松樹 (Fig. 14. 4) flowering plant 顯花植物 (Fig. 14. 5) chap. 14 Plant reproduction 2

Fig. 14. 1 Life cycle of Ulothrix, a green alga 單套 有性繁殖 chap. 14 Plant reproduction 3

Fig. 14. 1 Life cycle of Ulothrix, a green alga chap. 14 Plant reproduction 4

配子體 孢子體 配子體 Fig. 14 -2 the moss life cycle. chap. 14 Plant reproduction 5

配子體 孢子體 chap. 14 Plant reproduction Fig. 14. 3 the Fern 6

隨風授粉 Fig. 14. 4 pine tree chap. 14 Plant reproduction 7

只剩 一個 雌蕊 雄蕊 8個 細胞 Fig. 14. 5 flower chap. 14 Plant reproduction 8

Fig. 14. 6 a pollen chap. 14 Plant reproduction 9

Essay 14. 1 The coevolution of pollen and insects s The insects taking food from one flower after the next, became vehicles for pollen transport. As time passed, some flowers developed an increasing dependency on the visit of pollen -bearing insects. In time, plants began to compete for the attention of insects. chap. 14 Plant reproduction 10

昆虫與花朵的共同演化 chap. 14 Plant reproduction 11

chap. 14 Plant reproduction 12

Essay 14. 2 make me a flower s s Arabis holboilli, 通常是 開 blue flowers。 但偶而的會長出如同黃 色的花朵(如圖)。 這種花，其實並不是花。 是rust fungus(真菌)的寄 生，take over the plant's genetic machinery. chap. 14 Plant reproduction 13

子葉 種皮 Fig. 14 -7 Embryonic development chap. 14 Plant reproduction 15

增生區 Fig. 14. 9 根部構造 chap. 14 Plant reproduction 17

篩管 樹皮 Fig. 14. 10 primary and secondary growth in the stem chap. 14 Plant reproduction 18

Fig. 14. 10 primary and secondary growth in the stem chap. 14 Plant reproduction 19

Fig. 14. 11 (a) sclerenchyma 厚壁細胞 (b) collenchyma (c) parenchyma 薄壁細胞 chap. 14 Plant reproduction 20

植物 荷爾蒙 (hormones) s s Table 14. 1 Plant hormones Auxins：control elongation Gibberellins： stimulate cell division and elongation, aid in pollen germination Cytokinins ： react with auxins to produce growth chap. 14 Plant reproduction 21

Fig. 14. 12 In this classic experiment, the tip was cut from an oat seedling and placed on an agar cube that absorbed any fluids that might seep from the tip. Then the block was placed off center on a decapitated seedling. 有agar 的地方，生長較 快。 chap. 14 Plant reproduction 22

Fig. 14 Gibberellins have a dramatic effect on stem growth, as seen in these plants. chap. 14 Plant reproduction 23

Fig. 14. 13 Agent Orange was sprayed over the jungles of Vietnam (越南) to defoliate trees and make trails more visible. It was later implicated in a host of severe health problems among veterans exposed to it. chap. 14 Plant reproduction 24

v 問題與討論！ japalura@hotmail. com Ayo NUTN website: http: //myweb. nutn. edu. tw/~hycheng/ chap. 14 Plant reproduction 25