BIOA02H3 Lecture Notes - Lecture 10: Charophyta, Chlorophyta, Lignin
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BIOA02H3 Full Course Notes
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Document Summary
Most closely related to land plants, thought to share a common ancestor. Based on morphological, molecular, and biochemical data. Photosynthetic organisms using the same pigments as plants. Most live in freshwater but some are marine. Also use starch as a storage product. Early biochemical and structural adaptations enhanced plant survival on land such as adaptations to avoid water loss on land: The transition to life on land (page 669) Symbiotic associations with fungi were likely required for evolution of land plants. Symbiotic associations where the fungus colonizes the plant"s roots and grows profusely in the soil beyond the root system. Both partners benefit by two-way exchange of nutrients. Lignified water-conducting cells provided strength and support for plants to grow upright and internal water circulation system. Vascular plants plants with xylem and phloem (ferns, conifers, and flowering plants) Xylem specialized tissues that transport water through plant body made up of cells whose walls are reinforced with lignin.
