BIOL 2242 Lecture Notes - Lecture 4: Sanguinaria, Trillium Cernuum, Parasitic Plant
5 Feb 2018
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Document Summary
Native spring forest ephemerals: bloodroot (sanguinaria canadensis, nodding wake-robin (trillium cernuum) Active (uses energy directly: rare in plants. But many passively dispersed species invest energy indirectly in structures that facilitate dispersal: explosive dehiscence (splitting open of seed capsule) Turgor-driven (build up of pressure within the cells); ejects seeds up to. Germination: definition: resumption of active growth by viable embryo (that was dormant) Varies with the species: adequate h2o. Limited if excess h2o: suitable seed bed. Specialized (vary with species or site: light. Allows depth detection (to sense that it is near enough to the top to reach the soil edge) May need specific photoperiod to break dormancy (gives a clue to what season or time or year may be: fire. Common in spp in dry or boreal sites: mycorrhizal partner. In living cells; affected by solute gradient: metabolism. Switch from anaerobic to aerobic: highly sensitive to o2 supply. Catabolic phase fuels anabolic synthesis: meristem activation.
