PLNT 1213 Lecture Notes - Lecture 8: Phloem, Digitaria, C4 Carbon Fixation
Document Summary
Plant growth occurs through increase in cell number and increase in cell size. Where does this energy come from: photosynthesis fills the gas tank (energy, respiration starts the engine. The oxidative breakdown of organic substances: translation: burning sugars (to make energy, occurs in the mitochondria of cells. C6h12o6 + 6o2 6 co2 + 6 h2o + atp: glucose + oxygen energy, carbon dioxide, water. Stroma inside chloroplast is liquid where reactions take place. Calvin cycle is light independent photosynthesis produces sugar, there are light independent and light dependent reactions. Independent are in stroma (calvin cycle), dependent are in thylakoid. Photosynthesis: the use of light energy to convert non-nutritious compounds (co2 and h2o) into nutritious (essential) foodstuffs for use by plants. Occurs in chloroplasts: only in plant cells. Storage: future use, seeds- for the next generation. Glucose is the basic energy for the plant. Chloroplasts are green because it absorbs all light except green reflects that color.
