The life cycle of a moss (Bryophyta) - PowerPoint PPT Presentation

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The life cycle of a moss (Bryophyta)

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The life cycle of a moss (Bryophyta)
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The life cycle of a moss (Bryophyta)

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  1. Raindrop Key Male gametophyte Haploid (n) Spores develop into threadlike protonemata. Sperm Diploid (2n) 5 6 3 8 4 2 1 “Bud” Antheridia Protonemata “Bud” Egg Spores Gametophore Femalegametophyte Archegonia Peristome Rhizoid Sporangium FERTILIZATION Seta MEIOSIS (within archegonium) Capsule(sporangium) Zygote Calyptra Maturesporophytes Mature sporophytes Embryo Foot Archegonium Youngsporophyte Femalegametophytes Capsule with peristome (LM) 7 Figure 29.8 • The life cycle of a moss (Bryophyta)

  2. LIVERWORTS (PHYLUM HEPATOPHYTA) Gametophore of female gametophyte Foot Seta Sporangium 500 µm MOSSES (PHYLUM BRYOPHYTA) HORNWORTS (PHYLUM ANTHOCEROPHYTA) Sporophyte Sporophyte Gametophyte Gametophyte Figure 29.9 • Bryophyte diversity

  3. 1 3 2 • The life cycle of a fern Key Haploid (n) Diploid (2n) Antheridium Young gametophyte Spore MEIOSIS Sporangium Sperm Archegonium Egg Mature sporophyte New sporophyte Zygote Sporangium FERTILIZATION Sorus 6 4 Gametophyte 5 Fiddlehead Figure 29.12

  4. LYCOPHYTES (PHYLUM LYCOPHYTA) Strobili (clusters of sporophylls) A quillwort A spike moss A club moss PTEROPHYTES (PHYLUM PTEROPHYTA) Vegetative stem Strobilus on fertile stem Figure 29.14 FERNS HORSETAILS WHISK FERNS AND RELATIVES • Seedless vascular plants