Grasslands   Grasslands are found on every continent except Antarctica, and cover about 16 per cent of the Earth’s surface.  They develop where there is not enough precipitation to support forests, but enough to prevent deserts forming.

TLS Online TPP Program

#Id: 7127

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 7128

#Unit 6. System Physiology – Plant

Strigolactone biosynthetic pathway and signaling proteins. All-trans-b-carotene is isomerized to 9-cis-b-carotene by a b-carotene isomerase. 9-cis-b-Carotene is cleaved by carotenoid cleavage dioxygenases, to produce carlactone. 

The final stages of strigolactone synthesis and signalling occur in the cytosol.

TLS Online TPP Program

#Id: 7129

#Unit 6. System Physiology – Plant

Strigolactones act locally to repress axillary bud growth

TLS Online TPP Program

#Id: 7130

#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: 7131

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 7132

#Unit 6. System Physiology – Plant

Long-distance transport of three hormones that regulate shoot branching: auxins, cytokinins, and strigolactones. Auxin is produced primarily in young expanding leaves and is transported basipetally by PIN1- mediated polar auxin transport.