BIOA02H3 Lecture Notes - Lecture 5: Palisade Cell, Light-Independent Reactions, C4 Carbon Fixation

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Ivana Stehlik

Document Summary

Lecture 5 photosynthesis happens in parenchyma containing chloroplasts (chlorenchyma) palisade mesophyll stomata open allows for co2 to enter and for water and oxygen to leave for photosynthesis, plants need to open stomata need access to carbon dioxide. 90% of xylem water is lost to transpiration (eg. 200l p/day) problem occurs when water cannot be replaced from soil (eg. C3, c4, cam plants // water use efficiency: c3 < c4 < Cam ] all vary in amount of sugar produced per drop of water all systems use calvin cycle c4 and cam plants also have an upstream process that increases their. When low water, high sunlight oxygen levels in plant increases, carbon dioxide levels decrease and the stomata are closed. > increased oxygen in the plant is the main problem rubisco has an affinity for carbon dioxide as well as oxygen. Photorespiration uses up atp and nadph and loses 2 carbon dioxides.