Bryophytes - Structure and Function of Plants - Lecture Notes, Study notes of Biology

Download Bryophytes - Structure and Function of Plants - Lecture Notes and more Study notes Biology in PDF only on Docsity! Bryophytes 1. No changes to reading – note correction with Polysiphonia figure 2. Life on land • Desiccation • Dispersal - moving around gametes and spores • Accessing water and nutrients • Some of the innovation can be observed in the Bryophytes… 6. General to Bryophytes • Multicellular sporophyte – but, gametophyte is the predominant phase and in many the sporophyte is quite dependent on the gametophyte for water, nutrients, etc. • swimming sperm – water is required for reproduction 3. Protonema (plura –ta) – gives rise to the gametophyte 4. Modified Figure 16-4 (not in the sixth edition) • Multicellular Sporophyte • Sporopollenin in spore wall (Dispersal in air!) • Protective cell layer around the egg producing cell (Archegonium – ia) • Sporophyte retained on the gametophyte • Cuticle (epidermal layer with waxes) • Rhizoids (root-like). 7. Hepatophyta (Liverworts) • 6000 Species • Only some with cuticle • Sporophytes are really quite small • Two different groups of liverworts –Thalloid –Leafy 8. …11 – images of Gametophytes, Sporophytes and associated structures. 12. Liverwort as a generalized Bryophyte life cycle 13. Asexual reproduction in Liverworts 14. Stomata 15. Stomata Docsity.com