Change surface charge

Red light causes a depolarization of membranes and far-red reverses or even causes a slight hyperpolarization.

TLS Online TPP Program

#Id: 10148

#Unit 6. System Physiology – Plant

According to the current hypothesis, the gradient in phototropin phosphorylation induces the movement of auxin to the shaded side of the coleoptile. Once the auxin reaches the shaded side of the tip, it is transported basipetally to the elongation zone, where it stimulates cell elongation. The acceleration of growth on the shaded side and the slowing of growth on the illuminated side (differential growth) give rise to the curvature toward light.

TLS Online TPP Program

#Id: 10149

#Unit 6. System Physiology – Plant

Strigolactones are produced in the plastids from b-carotene by three sequentially acting plastid enzymes

TLS Online TPP Program

#Id: 10150

#Unit 6. System Physiology – Plant

Strigolactones, which occur in about 80% of plant species, are a group of terpenoid lactones

TLS Online TPP Program

#Id: 10151

#Unit 6. System Physiology – Plant

D27, a carotenoid isomerase, and CCD7 and CCD8, which are carotenoid cleavage dioxygenases synthesizes strigolactone

TLS Online TPP Program

#Id: 10152

#Unit 6. System Physiology – Plant

Strigolactones are perceived by a protein complex containing an a-/b-fold hydrolase protein and an F-box protein (D14 and MAX2, respectively)

TLS Online TPP Program

#Id: 10153

#Unit 6. System Physiology – Plant

Strigolactone promote symbiotic interactions with arbuscular mycorrhizal fungi, facilitating phosphate uptake from the soil.