BIOL 2304 Quiz: Quiz 11 Guidelines_2016
Document Summary
Quiz 11 questions will be based on material from lectures 22 and 23. Make yourself familiar with the following questions and subjects: stress physiology acclimation and adaptation. Adaptation: genetic changes in an entire plant population have been fixed over many generations by selective environmental pressure, drought stress and tolerance. Free electrons produced by the reaction centers are not transferred to nadp+ but to o2, which leads to the generation of reactive oxygen species (ros). Altering morphology: decreasing leaf area by slowing leaf expansion reduced transpiration of water, decreasing leaf number stimulation of leaf abscission, thickening the cuticle reducing transpiration (cuticular transpiration accounts for only 5-10% of total leaf transpiration) Stomatal closure leads to a reduced uptake of co2 and requires less. Free electrons produced by the reaction centers are not transferred to nadp+ but to o2, which leads to the generation of reactive oxygen species (ros): mechanisms of drought tolerance. Plants adjust osmotically to drying soil by accumulating solutes.
