Chloroplasts and mitochondria have multiple heat tolerant isozymes of SOD and APX in leaf and inflorescence in Chenopodium album

► Chloroplastic and mitochondrial SOD and APX from leaf and inflorescence of Chenopodium album showed activity even after boiling temperature treatment. ► Chloroplastic and mitochondrial APX isozymes showing activity at boiling temperature are being reported for the first time. ► Thermostable SOD and APX in both chloroplast and mitochondria may contribute to heat tolerance in C. album.