In order to explore the effects of alkaline salt stress on the ascorbic acid-glutathione cycle（AsA-GSH） of mitochondria in the radicle and plumule of Bothriochloa ischaemum， this experiment used ‘Taihang’ Bothriochloa ischaemum as material， which was germinated in NaHCO₃ and Na₂CO₃ solutions with Na⁺ concentration of 0（CK）， 10 and 30 mmol·L^-1， and then changes in the activities of AsA-GSH enzymes and lipid peroxidation in their mitochondria of radicle and plumule were analyzed. The results showed that the activities of superoxide dismutase， catalase， glutathione peroxidase and monodehydroascorbate reductase in the mitochondria of radicle increased with the increase of Na⁺ concentration （0-30 mmol·L^-1）， but the opposite phenomenon was observed in the activities of glutathione sulfur transferase， ascorbate peroxidase and glutathione reductase. With the increase of Na⁺ concentration （0-30 mmol·L^-1）， the activities of superoxide dismutase， catalase and glutathione peroxidase in the mitochondria of plumule increased significantly （P<0.05）， but the activities of glutathione sulfur transferase， glutathione reductase and monodehydroascorbate reductase decreased significantly （P<0.05）. There were differences in the effects of type and concentration under alkaline salt on the AsA-GSH in radicle and plumule of Bothriochloa ischaemum， and the sensitivity of mitochondrial AsA-GSH in radicle of Bothriochloa ischaemum to alkaline salt stress was higher than that in plumule.

Alkaline salt stress  /  Bothriochloa ischaemum  /  Mitochondria  /  Ascorbic acid-glutathione cycle  /  Radicle  /  Plumule