In legumes, it has been shown that "sleep" movements are correlated with
A)positive thigmotropisms.
B)rhythmic opening and closing of K+ channels in motor cell membranes.
C)senescence (the aging process in plants).
D)flowering and fruit development.
E)ABA-stimulated closing of guard cells caused by loss of K+.

Question

Quizplus · Accepted Answer

Sleep movements in legumes are rhythmic movements of the leaves that are hypothesized to aid in photosynthesis and optimize light capture. These movements are thought to be caused by the opening and closing of K+ channels in motor cell membranes, which control the influx and efflux of ions and water and lead to changes in turgor pressure and leaf position.

Note: None of the other answer choices are supported by the current scientific understanding of sleep movements in legumes.

In Legumes, It Has Been Shown That "Sleep" Movements Are