Isopentenyl diphosphate (IPP)

Zeaxanthin (C40)

all trans-Violaxanthin (C40)

9‘-cis-Neoxanthin (C40)

Xanthoxin (C15)

ABA-aldehyde (C15) Abscisic acid (C15) (ABA)

TLS Online TPP Program

#Id: 3307

#Unit 6. System Physiology – Plant

Glutathione contains γ-Glu-Cys-Gly

TLS Online TPP Program

#Id: 3308

#Unit 6. System Physiology – Plant

The hydrogen peroxide (H 2 O 2 ) thus generated is rendered harmless by the action of glutathione peroxidase.

TLS Online TPP Program

#Id: 3310

#Unit 6. System Physiology – Plant

Glutathione probably helps maintain the sulfhydryl groups of proteins in the reduced state and the iron of heme in the ferrous (Fe 2+ ) state, and it serves as a reducing agent for glutaredoxin in deoxy ribonucleotide synthesis.

TLS Online TPP Program

#Id: 3312

#Unit 6. System Physiology – Plant

Redox function is also used to remove toxic peroxides formed in the normal course of growth and metabolism under aerobic conditions, catalyzed by glutathione peroxidase.

TLS Online TPP Program

#Id: 3313

#Unit 6. System Physiology – Plant

Plant Mitochondria Have Alternative Mechanisms, In light the principal source of mitochondrial NADH is a reaction in which glycine, produced by a process known as photorespiration, is converted to serine

TLS Online TPP Program

#Id: 3314

#Unit 6. System Physiology – Plant

Plants must carry out this reaction even when they do not need NADH for ATP production