BIL 150 Lecture Notes - Lecture 11: Receptor Tyrosine Kinase, Ion Channel, Vascular Bundle
Document Summary
Photorespiration: plants close stomata on hot days in order to conserve water, but it limits photosynthesis by reducing access to co2 and causing o2 to build up. Cam plants: crassulacean acid metabolism to fix carbon, open their stomata at night incorporating co2 into organic acids, stomata closed during the day, and co2 is released from organic acids and used in the calvin. Local and long distance signaling: communicate via signaling molecules. Local, is the use of direct contact (paracrine, synaptic) Long distance signaling: endocrine (hormonal) signaling, example: blood vessels, animal and plant cells have cell junctions that directly connect the cytoplasm, gap junctions in plant cells, plasmodesmata in plant cells, cell cell recognition. 3 stages: reception, a signaling molecule bonds to a receptor protein causing it to change shape, the binding between a signal molecule (ligand) and receptor is highly specific, transduction, response. 3 main types of receptors: g protein, receptor tyrosine kinase.
