Becker's World of the Cell 9th Edition by Lewis Kleinsmith, Jeff Hardin, Gregory Paul Bertoni

تمرين 2

The hcef mutant. Recently, Livingston et al. ( The Plant Cell 22: 221,2010)isolated an Arabidopsis thaliana mutant with unusually high cyclic electron flow (hcef). See if you can predict the results they observed when comparing the /ice/mutant plants with normal Arabidopsis plants.
(a)How was noncyclic electron flow affected in hcef mutant plants
(b)What happened to the light-driven proton flux across the thylakoid membrane
(c)How was the activity of PSII affected
(d)The researchers observed a large increase in the level of fructose-1,6-bisphosphate in the stroma of the /ice/mutant. What enzyme do you predict is defective
(e)What would you predict is the effect on starch synthesis in the stroma