Plant Cells Contain Types of Peroxisomes Not Found in Animal Cells

Question 1

Leaf Peroxisomes:
what contains them?
where do they appear?
what are they involved in?

Answer 1

• cells of leaves and other photosynthetic plant tissue contain characteristic large, prominent leaf peroxisomes which often appear in close contact with chloroplasts and mitochondrion, and those three organelles are involved in the glycolate pathway

Question 2

Glyoxysomes :
when do they occur?
what does these species also contain?
where are they found and what happens to them when they are no longer needed?

Answer 2

• occur shorty in seedlings
• these species contain enzymes needed to convert stored triglycerols to sucrose, β-oxidation of fatty acids, and the glyoxylate cycle
• glyoxysomes are only found in the tissues where the fat is stored, and when no longer needed they are converted to peroxisomes

Question 3

Other types of plant peroxisomes:

Answer 3

• another kind of specialized peroxisome is found in nodules, which is the structure on the plant root in which plant cells and certain bacteria cooperate in the fixation of atmospheric nitrogen
• nodule peroxisomes are involved in processing the fixed nitrogen