chapter37 - flowering plant reproduction _pdf_

chapter37 - flowering plant reproduction _pdf_ - Pollen...

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Chapter 37 A haploid gametophyte generation, located in the flower, that is microscopic and nutritionally dependent on the diploid sporophyte generation
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Seedless (ex some club mosses (Selaginella) and ferns) Seeded (all) Homosporous Heterosporous antheridia and archegonia sporangium Small, reduced, resides within sporophyte Thallus, prothallus pronouned gametophyte
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protective attractant Flower Reproductive Structures Rf: Fig 28-10,12
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Pollen grains transported to stigmas by agents, such as animals and wind: Self-pollination Cross-pollination:
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Reciprocal evolution
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Megasporangium Megasporocyte (1) Four (n) megaspores Functional megaspore (n) produces: 3 antipodal cells 2 polar nuclei (production of endosperm) 2 synergids (pollen tube guidance) Egg cell Microsporangium Microsporocytes Four (n) Microspores Each microspore
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Unformatted text preview: Pollen Grain (n) containing: Generative cell (forms two sperm cells) and a tube cell Mature (pistil) Sporophyte Mature (stamen) Sporophyte (Fig 37-3) Integuments become the seed coat Becomes anchor blackberry Accessory Fruits (Fig 37-12) Internal Factors External environmental factors Eudicot (bean) Monocot (corn) Rhizome : Rhizome Adventitious roots Rhizome Roots Tuber Tuber Asexual Reproductive Methods (Fig 37-16a,b) Bulb (Fig 37-16c): Fleshy leaves Bulb Stem Adventitious roots Axillary bud Corm (modified stem) Old corm (last years) Adventitious roots Corm (Fig 37-16d): New shoot Scale leaf (at node) Stolon (runner) Adventitious roots Stolon (Fig 37-16e) Plantlets (Fig 37-17): Suckers (Fig 37-18): Production of seeds and fruits asexually : Asexual reproduction Sexual reproduction...
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chapter37 - flowering plant reproduction _pdf_ - Pollen...

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