摘要： 通过土培试验研究重金属铜(Cu)胁迫对香豌豆幼苗生长及生理指标的影响。结果表明:当Cu浓度低于50 mg/kg时对香豌豆幼苗生长有促进作用，大于50 mg/kg时对香豌豆幼苗地下部生长有抑制作用，Cu处理浓度为100 mg/kg时，地下部干重较对照(CK)下降16%。当Cu浓度大于50 mg/kg时，植物光合色素含量随Cu浓度的升高而降低；当Cu浓度低于75 mg/kg时，香豌豆地下部分细胞膜脂过氧化程度上升，地上部分丙二醛的浓度随Cu浓度升高而下降；地上部和地下部过氧化物酶(POD)随着Cu浓度的上升而先升后降；脯氨酸和抗坏血酸的含量随Cu浓度的升高都表现出提高的趋势。可见POD、脯氨酸和抗坏血酸在提高香豌豆抗性方面起到重要的作用。

关键词: 铜胁迫, 香豌豆, 生长指标, 生理特性

Abstract: Effects of Cu (0 － 100 mg /kg) on growth and some physiologica lindexes of Lathyrus odoratus seedlings were studied by soil culture method． The results show that seedling growth of odoratus L． were promoted under50 mg Cu treatments and inhibited as the Cu concentrations more than 50 mg /kg， and the dry weight of undergroundpart under 100 mg /kg Cu treatment decreased to 84% of control． photosynthetic pigment contents in the leaves decreased as the Cu concentrations more than 50 mg /kg． The MDA concentrations in underground parts of odoratus L．enhanced under 75 mg /kg Cu treatments and MDA concentrations in aboveground parts decreased as the rise of Culevels． The activities of peroxidase ( POD) of aboveground and underground parts increased first and then droppedas Cu concentration increased． Proline and ascorbic acid contents ofL. odoratus showed increase trend under Cutreatments． The results indicated that POD， proline and ascorbic acid in the odoratus L． played important role in theCu resistance， defense reactive oxygen species is significant role．

Key words: Copper ( Cu ), Lathyrus odoratus, Growth parameter, Physiological characters

中图分类号: 

• S681.9