BIOL 205 Study Guide - Final Guide: C3 Carbon Fixation, Photoinhibition, C4 Carbon Fixation

• School: McGill University
• Department: Biology (Sci)
• Course: BIOL 205
• Professor: Rajinder Dhindsa

Document Summary

Lecture 5: whole plant and crop photosynthesis: response of photosynthesis to light intensity. Minimum light intensity at photosynthetic carbon gain = carbon loss due to respiration/photorespiration light compensation point (lcp) Under lcp: plants are losing c will exhaust themselves to death through (photo)respiration. Over lcp: light intensity is so high that products (atp and nadph) not consumed fast enough by. Photo oxidation and photo-inhibition of photosynthesis damage to photosynthetic machinery depending on excessive light intensity level. Photo inhibition under moderate light excess = dynamic photo inhibition. Rate of photosynthesis will slowly reach rate of optimal photosynthesis. Whether plant = sun plant or shade plant can be acclimatized to diff light intensity. Plant used to a low light i will reach stop at photosynthetic rate before plant used to a higher light intensity. Even if sun plant, response to light i depends on previous exposure.