BIOA02H3 Lecture Notes - Lecture 1: Prothallium, Gnetum, Lycopodiophyta
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BIOA02H3 Full Course Notes
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Bioa02 facilitated study group (fsg) session 1: plant cell types. Thin-walled, least specialized; found in potatoes and apple flesh. Used for filling up space, photosynthesis (chlorenchyma) and storage of nutrients. Two types: sclereids and fibers; ex. sclereids are in pear flesh and fibres are found in flax plants. Used for structural strength and is expensive to make. Meristem: lateral meristem, collenchyma, sclerenchyma, parenchyma. No cuticle=high water loss and uptake. Spends majority of life in gametophytic (haploid) generation. Only haploid generation is photosynthetic; sporophytic (diploid) generation feeds off gametophytic. Sporophytes have cuticle; thus not as dependent as bryophytes. Ferns: dependent on water for prothallium (gametophytic/haploid generation) Water required for sperm transport. Spends most of life cycle in the sporophytic generation! Prothallium is very short lived. Ferns are photosynthetic at all points in their life cycle. Not discussed in lectures (monocots and. Relatively low dependency compared to other plants. Take required water from the soil.
