Bryophytes Reproduction Chapter 5 Part 1 PDF
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Uploaded by LuckyNash1055
Lebanese University - Faculty of Sciences
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Summary
This document provides information on bryophyte reproduction, covering asexual methods like fragmentation and gemmae, and sexual reproduction, which involves a haplodiplobiotic life cycle. The text emphasizes the importance of water for fertilization and the lack of vascular tissue in these non-vascular plants.
Full Transcript
Bryophytes are non vascular plants they have no conductive tissue Cryptogams : the sexual organs do not appear Fertilization needs water ( oogamy) Covered with waxy cuticle that prevents water loss Characterized by : Mosses (common name : bryopsida) Liverworts (common name: hepaticopsida) Hor...
Bryophytes are non vascular plants they have no conductive tissue Cryptogams : the sexual organs do not appear Fertilization needs water ( oogamy) Covered with waxy cuticle that prevents water loss Characterized by : Mosses (common name : bryopsida) Liverworts (common name: hepaticopsida) Hornworts (common name :anthoceropsida) The sporophyte is parasitic because it is fed by the gametophyte Asexual reproduction - Fragmentation: pieces of gametophyte breakoff then the new pieces change to bryophyte plants - Gemmae: propagules tiny structures that are found on the gametophytes then rain separate them so they spread to form new gametophytes Sexual reproduction: Bryophytes have haplodiplobiotic life cycle Haploid \> diploid - It do mitosis ; Gametangia -\> antheridia {male} each one will give many motile male gametes -\>archegonia {female} each one will give one egg - We could have bryophytes that bear both male and female gametes in one gametophyte.
