中文摘要：

分别采用苯甲酸、香草酸、水杨酸、对羟基苯甲酸、丙二酸等5种化感物质溶液浇灌盆栽广藿香幼苗,研究其对幼苗的生长、超氧化物岐化酶（SOD）、过氧化物酶（POD）和膜脂过氧化产物（MDA）的影响。结果表明,5种化感物质对广藿香幼苗生长有明显的影响,总体表现出＂低促高抑＂的变化趋势。这5种化感物质处理的广藿香幼苗,其叶片MDA含量和POD活性均随处理浓度的增加而升高,SOD活性则表现出＂先上升后下降＂的趋势,广藿香幼苗生长对化感物质种类和浓度具有双重依赖性,10.0 mmol·L-1对羟基苯甲酸能显著抑制广藿香幼苗的生长。

英文摘要：

Pogostemon cablin seedlings were watered with 5 allelochemicals（ benzoic acid,vanillic acid,salicylic acid,p-hydroxy benzoic acid and malonic acid） at the concentration of 0. 5,1. 0,5. 0,10. 0 mmol·L- 1,respectively to observe their growth,and their activities of superoxide disproportionation enzyme（ SOD）,peroxidase（ POD） and membrane lipid peroxidation products（ MDA）. The results showed that these 5 allelochemicals had obvious effects on the growth of P. cablin seedlings,and tended to promote the plant growth at a low concentration and suppress plant growth at a high concentration. The membrane permeability,MDA content and POD activities were obviously increased with the concentration of the allelochemicals,but the SOD activities were first increased at a lower concentration and then decreased at a higher concentration. The growth of P. cablin seedling depended on both allelochemicals and their concentrations. The growth and development of P. cablin was restrained obviously in the treatment of p-hydroxy benzoic acid at a concentration of 10. 0 mmol·L- 1.