peroxisome-biology
Peroxisome biology is the study of peroxisomes, small membrane-bound organelles that carry out essential oxidative reactions including fatty acid beta-oxidation, photorespiration, and the detoxification of reactive oxygen species. In plants, peroxisomes play uniquely critical roles not found in animals, particularly in seed germination (mobilizing stored lipids), C3 photosynthesis (as sites of the photorespiratory pathway), and stress responses. Understanding peroxisome function, biogenesis, and dynamics is therefore central to improving plant metabolism, stress tolerance, and overall crop performance.
PubMed · 2026-04-11
Scientists have mapped and analyzed an entire gene family in wheat that controls how cells multiply tiny compartments called peroxisomes, finding these genes respond strongly to drought stress and may help explain why some wheat varieties survive dry conditions better than others.
12 gene locations encoding 13 protein forms of the PEX11 peroxisome-proliferation family were identified across the wheat genome for the first time.
Drought-tolerant wheat variety Masr-3 showed significantly higher expression of specific PEX11 genes compared to sensitive variety Sakha-94, alongside increased catalase enzyme activity indicating a stronger oxidative stress defense.
The gene family expanded through segmental duplications and has been maintained under strong purifying (stabilizing) selection, suggesting these genes perform important, conserved functions across evolutionary time.
