The absorption spectra of the bases in polymers are sensitive to pH and greatly influenced by electronic interactions between bases.

TLS Online TPP Program

#Id: 10121

#Unit 6. System Physiology – Plant

Covalent conjugation of amino acids to IAA can also result in permanent inactivation.

TLS Online TPP Program

#Id: 10122

#Unit 6. System Physiology – Plant

The IAA conjugate to Asp or Glu causes irreversibly degraded to the oxIAA conjugate. IAMT1, indole-3-acetate O-methyltransferase1.

TLS Online TPP Program

#Id: 10123

#Unit 6. System Physiology – Plant

   

TLS Online TPP Program

#Id: 10124

#Unit 6. System Physiology – Plant

IAA enters the cell as 

IAAH

IAA-

TLS Online TPP Program

#Id: 10125

#Unit 6. System Physiology – Plant

H+–IAA– symporter cotransports two protons along with

the auxin anion which changes pH 7 equilibrium of cytosol so H+ ATPase actively transports H+ in apoplast

TLS Online TPP Program

#Id: 10126

#Unit 6. System Physiology – Plant

Auxin always exits cells as IAA- anions via auxin anion efflux carriers that are concentrated at the basal ends of each cell in the longitudinal pathway.