以峨眉蕺菜和湘白鱼腥草2个鱼腥草品种为材料,研究了Na Cl胁迫对鱼腥草地下茎、地上茎和叶过氧化物酶活性的影响。以0、0.10、0.15、0.20、0.25摩尔/升浓度的Na Cl溶液处理旺长期的鱼腥草。结果表明,在0~0.25摩尔/升,湘白鱼腥草地下茎的过氧化物酶活性变化不大,当Na Cl浓度大于0.2摩尔/升后,峨眉蕺菜地下茎的过氧化物酶活性开始下降;2种鱼腥草地上茎的过氧化物酶活性变化都是先上升再减少,过氧化物酶活性最高点都在0.1 In this paper, two Echinochloa crusgalli and Houttuynia cordata Thunb., Two Houttuynia cordata varieties, were used as materials to study the effects of NaCl stress on the activities of peroxidase in the rhizomes, aerial stems and leaves of Houttuynia cordata Thunb. Houttuynia cordata was treated with NaCl concentrations of 0, 0.10, 0.15, 0.20 and 0.25 mol / l. The results showed that at 0 ~ 0.25 mol / L, the peroxidase activity of underground rhizome of Xiangbai Houttuyniae did not change much. When NaCl concentration was more than 0.2 mol / L, the peroxidase activity of rhizomes ; 2 kinds of Houttuynia stems peroxidase activity changes are first increased and then decreased, the highest peroxidase activity at 0.1