寄主植物对不同龄期中华稻蝗若虫酯酶活性的影响

摘要

以中华稻蝗为研究对象,以狗尾草、小麦、晋稻8号、晋稻9号、旱稻297号为寄主植物,测定了饲喂不同寄主植物后中华稻蝗1-5龄若虫的酯酶活性.结果表明,饲喂不同寄主植物后,中华稻蝗各龄期若虫酯酶比活性均是狗尾草组最低,晋稻9号组最高,且两者差异显著,晋稻9号组的活性是狗尾草组的1.65-2.22倍,推测晋稻9号可能有某种特殊的物质,对中华稻蝗若虫酯酶的诱导作用较强.研究结果还显示,无论饲喂何种寄主植物,中华稻蝗若虫酯酶比活性均表现为随着龄期的增长,活性逐渐增高的趋势.%The specific activity of EST of Oxya chinensis fed on different host plants(Setaria viridis,Triti-cum aestivum ,Oryza sativa (Jindao 8,Jindao 9,Handao297))was studied from the first-instar nymph to the fifth-instar nymph.The results showed that O.chinensis fed on S.viridis had the lowest EST specific activity and those fed on Jindao 9 had the highest EST specific activity.Significant differences were observed between them.The specific activities of O.chinensis fed on jindao 9 were 1.65-2.22-time higher than those fed on S.viridis.It suggested that there might be a particular substance in Jindao 9 that had strong induction to EST specific activity of O.chinensis.No matter what kind of host plant fed on, the EST activity of O.chinensis was increased gradually with the development of O.chinensis.