There are two basic types of DNA synthesis

TLS Online TPP Program

#Id: 7112

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 7113

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 7114

#Unit 6. System Physiology – Plant

In the absence of ethylene, ETR1 and the other ethylene receptors activate the kinase activity of CTR1. This leads to a repression of the ethylene response pathway, possibly through a MAP kinase cascade. 

The binding of ethylene to the ETR1 dimer results in its inactivation, which causes CTR1 to become inactive.

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#Id: 7115

#Unit 6. System Physiology – Plant

ETO- and CTR- Mutants gives constitutive triple response

CTR- mutants always gives constitutive triple response

CTR1 appears to be related to RAF-1, a MAPKKK serine/ threonine protein kinase

TLS Online TPP Program

#Id: 7116

#Unit 6. System Physiology – Plant

ABA (C15) biosynthesis takes place in chloroplasts and cytosol from C40 precursor

ABA closes stomata in response to water stress

ABA promotes root growth and inhibits shoot growth at low water potentials

TLS Online TPP Program

#Id: 7117

#Unit 6. System Physiology – Plant