Rho is a member of the family of hexameric ATP-dependent helicases. Each subunit has an RNA-binding domain and an ATP hydrolysis domain.

TLS Online TPP Program

#Id: 9228

#Unit 6. System Physiology – Plant

8 μM CO2 (0.038%) and 250 μM O2 (21%) at 25°C. Therefore, a specificity factor of 100 gives a Vc/Vo ratio of 3.2.

TLS Online TPP Program

#Id: 9229

#Unit 6. System Physiology – Plant

C2 oxidative photosynthetic carbon cycle is essential for land plants for retrieving the carbon atoms of 2-phosphoglycolate.

TLS Online TPP Program

#Id: 9230

#Unit 6. System Physiology – Plant

C4 and CAM plants have evolved to limit photorespiration by concentrating CO2 at the site of carbon fixation.

The deleterious impact of photorespiration evolved C4 and CAM plants

TLS Online TPP Program

#Id: 9231

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 9232

#Unit 6. System Physiology – Plant

In photosynthesis, the relationship of O2 evolved to CO2 taken up is 1:1. 

In photorespiration, 3 O2 are taken up for every CO2 evolved.

TLS Online TPP Program

#Id: 9233

#Unit 6. System Physiology – Plant

Photorespiration stimulates nitrate assimilation in C3 plant roots, probably by increasing NADH availability in the cytosol.

Photorespiration is positively correlated with growth under nitrogen limitation