#Question id: 10495
#Unit 6. System Physiology – Plant
Guard cells have different mechanisms mediating responses to blue light. The npq1 mutant has a lesion in the enzyme that covert violaxanthin to zeaxanthin. What will causes if the npq1 mutant?
#Question id: 10494
#Unit 6. System Physiology – Plant
Sucrose is an osmotically active solute in guard cells, One implication of these osmoregulatory features is that stomatal opening & closing is associated with which of the following given statements?
#Question id: 10493
#Unit 6. System Physiology – Plant
Which wavelength modulates guard cell osmoregulation by means of its activation of proton pumping, solute uptake, and stimulation of the synthesis of organic solutes;
#Question id: 10491
#Unit 6. System Physiology – Plant
Acidification of the lumen stimulates zeaxanthin formation, and alkalinization favors violaxanthin formation. Lumen pH depends on photosynthetic photon flux density, most effective at
#Question id: 10490
#Unit 6. System Physiology – Plant
Which of the following is a correct Match of the stomatal opening and closing mechanism;
COLUMN A
COLUMN B
P-
Opening of Stomata i) Chloride anions are taken up into the
guard cells from the apoplast
Q- Closing of stomata ii)
The malate content of guard cells decreases
iii) starch content in
guard cells increases during end of the
iv)
Acidification of the lumen stimulates zeaxanthin formation which activates the
H+ ATPase causing
v) Accumulation of solute in vacuole such as sucrose and malate leads to
#Question id: 10489
#Unit 6. System Physiology – Plant
Malate anions, by contrast, are synthesized in the guard cell cytosol, in a metabolic pathway that uses carbon skeletons generated by