The overall change in allelic frequency is a balance between the opposing forces of forward mutation and reverse  mutation:

TLS Online TPP Program

#Id: 10187

#Unit 6. System Physiology – Plant

Induce cell division in callus cells in the presence of an auxin

Promote bud or root formation from callus cultures when in the appropriate molar ratios to auxin

Delay senescence of leaves

Promote expansion of dicot cotyledons

TLS Online TPP Program

#Id: 10188

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 10189

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 10190

#Unit 6. System Physiology – Plant

iP and tZ are active, and their derivatives are abundant, but they are susceptible to degradation by CK oxidase (CKX).

TLS Online TPP Program

#Id: 10191

#Unit 6. System Physiology – Plant

all cZ‐type CKs are derived from tRNA degradation in cZ‐abundant plant species, such as O. sativa.

TLS Online TPP Program

#Id: 10192

#Unit 6. System Physiology – Plant

cZ is thought to be less active and relatively more stable than tZ and iP because of its low affinity for CKX. cZ and its conjugates are more abundant than tZ‐ and iP‐type CKs in Z. mays, O. sativa, chickpea (Cicer arietinum) and a moss (Physcomitrella patens)