HER2 (mouse Erb-B2), cannot bind any ligand, it can form a heterodimer with ligand-activated HER1, HER3, or HER4 (Erb-B1, 3, or 4)

TLS Online TPP Program

#Id: 10181

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 10182

#Unit 6. System Physiology – Plant

GA3-stimulated a-amylase production by GA-MYB for starch mobilisation in seeds

TLS Online TPP Program

#Id: 10183

#Unit 6. System Physiology – Plant

Brassinosteroids are also required for promotion of cell

elongation by gibberellins, and gibberellin-induced degradation of the DELLA repressor enhances the brassinosteroid response

TLS Online TPP Program

#Id: 10184

#Unit 6. System Physiology – Plant

Gibberellin appears to promote flowering in Arabidopsis by activating expression of the LEAFY gene.

The activation of LFY by gibberellin is mediated by the

transcription factor GA-MYB

TLS Online TPP Program

#Id: 10185

#Unit 6. System Physiology – Plant

Ratio of GA:ABA affects early germination (vivipary). 

With high levels of ABA, seeds remain dormant.

TLS Online TPP Program

#Id: 10186

#Unit 6. System Physiology – Plant

Cytokinins are defined as compounds that have biological activities similar to those of trans-zeatin.