X-Linked Recessive Trait

a. Usually more males than females are affected.

b. Affected sons are usually born to unaffected mothers; thus, the trait skips generations.

c. Approximately half of a carrier (heterozygous) mother’s sons are affected.

d. Never passed from father to son.

e. All daughters of affected fathers are carriers.

TLS Online TPP Program

#Id: 10120

#Unit 6. System Physiology – Plant

In maize kernels, IAA also appears to be synthesized by a tryptophan independent pathway via indole-3- glycerol phosphate

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