An origin at which replication is initiated. It may also have a terminus at which replication stops.

TLS Online TPP Program

#Id: 10157

#Unit 6. System Physiology – Plant

Strigolactone is a group of trepenoids that produced in both shoots and roots and is transported through xylem

TLS Online TPP Program

#Id: 10158

#Unit 6. System Physiology – Plant

Plants with strong apical dominance are typically weakly branched and show

a strong branching response to decapitation

TLS Online TPP Program

#Id: 10159

#Unit 6. System Physiology – Plant

Direct application of cytokinin to axillary buds stimulates

their growth but strigolactone suppresses axillary bud growth. Besides activating BRC1, strigolactone also inhibits cytokinin biosynthesis by negatively regulating the IPT genes.

TLS Online TPP Program

#Id: 10160

#Unit 6. System Physiology – Plant

Apical dominance is regulated by sugar availability. After decapitation, sugars, rapidly accumulate in axillary buds, stimulating bud outgrowth.

TLS Online TPP Program

#Id: 10161

#Unit 6. System Physiology – Plant

GA levels in plants are correlated with stem length, internode elongation and seed germination

TLS Online TPP Program

#Id: 10162

#Unit 6. System Physiology – Plant

The biosynthesis of gibberellins is under strict genetic, developmental, and environmental control, and numerous gibberellin-deficient mutants have been isolated. 

Mendel’s tall/dwarf alleles in peas are a famous example. Such mutants have been useful in elucidating the complex pathways of gibberellin biosynthesis.