Only fully methylated origins can initiate replication;

hemimethylated daughter origins cannot be used again until they have been restored to the fully methylated state.

TLS Online TPP Program

#Id: 7522

#Unit 6. System Physiology – Plant

NPA, TBA, CPD and gravacin are auxin efflux

inhibitors

NOA is an auxin influx inhibitor

AEIs can interfere with the trafficking of the plasma membrane proteins to which they bind, apparently by altering protein-preotein interactions.

TLS Online TPP Program

#Id: 7523

#Unit 6. System Physiology – Plant

Cytochalasin D, an inhibitor of actin polymerization, also inhibits AUXIN efflux

TLS Online TPP Program

#Id: 7524

#Unit 6. System Physiology – Plant

Auxin-induced proton extrusion acidifies the cell wall and increases cell extension Auxin increase the rate of proton extrusion (wall acidification), and the kinetics of proton extrusion should closely match those of auxin-induced growth.

TLS Online TPP Program

#Id: 7525

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 7526

#Unit 6. System Physiology – Plant

AUXIN SIGNAL TRANSDUCTION PATHWAYS

TLS Online TPP Program

#Id: 7527

#Unit 6. System Physiology – Plant

The auxin receptor is composed of two proteins: the SCF complex component TIR1 and the repressor protein AUX/IAA. Ubiquitin moieties are first activated by E1 ligase and added to target proteins by E2 ligase.