Problem Set #4 (15 points)
ECOL 340 Plant Form, Function & Diversity
Spring 2007
NAME __________________________________________________
(1) Matching. (7 points)
_____ Supply Function
A. Minimize light limitations
_____ CAM photosynthesis
B. Leaves responde to ABA and leaf water potential
_____ Acclimation
C. Change in trait over generations
_____ Anisohydric species
D. Maximize carboxylation limitations
_____ Photorespiration
E. Carbon fixation/ calvin cycle spatially separated
_____ Abscisic acid
F. Causes higher compensation point in C3 plants
_____ Shade leaves
G. Limited by stomatal response to light and water
_____ AOPT
H. Lowers leaf conductance with carbon assimilation
_____ Isohydric species
I. Carbon fixation/ calvin cycle temporarily separated
_____ Adaptation
J. Decrease stomatal conductance
_____ WUE
K. Change in trait within hours
_____ C4 photosynthesis
L. Peak in net carbon assimilation rate
_____ Acclimatization
M. Found in mesic habitats
_____ Sun leaves
N. Change in trait within lifetime of plant
(2) State whether the following characteristics are for a plant that is CAM or C4 or both
(C4 and CAM), C3 or ALL (C3, C4 and CAM (1 point each).
Fix CO2 using PEP carboxylase to create a 4 carbon sugar ___________
Accumulate malic acid in vacuoles ___________
Have increased CO2 in mesophyll cells relative to rest of cell ___________
Organic acids decarboxylated to produce CO2___________
Higher WUE and NUE ___________
Calvin cycle is used to make sugar from carbon dioxide ___________
Found in hot/dry, shady, high elevation and aquatic environments ___________
CO2 is assimilated in bundled sheath cells ___________
Fix CO2 using Rubisco to create phosphoglycerate ___________
Decreased stomatal opening during hot part of day ___________