Sites and Substrates of photorespiration

Photorespiration occurs only in chlorophyllous tissues of plants. The process of photorespiration occurs in three different organelles viz.,

1. Chloroplasts

2. Peroxisomes and

3. Mitochondria.

Substrates of Photorespiration

Glycolate (glycolic acid) is the chief substrate of photorespiration. Other important metabolites are the two amino acids such as glycine and serine.