摘要
【目的】通过对不同品种辣椒叶片内容物和烟粉虱Bemisia tabaci(Gennadius)种群数量的相关关系研究,探讨辣椒品种对烟粉虱的抗生性机制。【方法】在不同品种辣椒上饲养烟粉虱,研究烟粉虱的种群趋势指数,同时测定不同辣椒品种叶片中可溶性糖、可溶性蛋白、游离脯氨酸、酚类化合物和黄酮类化合物含量,分析烟粉虱种群数量与辣椒内容物的相关关系。【结果】不同品种辣椒上烟粉虱的种群趋势指数存在显著差异;抗虫辣椒品种叶片中可溶性糖、酚类化合物和黄酮类化合物含量显著高于感虫品种,可溶性蛋白、游离脯氨酸含量显著低于感虫品种。烟粉虱种群趋势指数与可溶性糖、酚类化合物和黄酮类化合物含量呈显著负相关,与可溶性蛋白、游离脯氨酸含量呈显著的正相关,其中可溶性糖含量对烟粉虱种群趋势指数影响最大。对可溶性糖(X_1)、可溶性蛋白(X_2)、游离脯氨酸(X_3)、酚类化合物(X_4)、黄酮类化合物(X_5)的含量5个因素与烟粉虱种群趋势指数(Y)进行多元回归分析,其回归方程为:Y=47.801-1.754X_1+1.206X_2+1.108X_3-0.437X_4-0.649X_5(R^2=0.688)。【结论】抗性辣椒品种对烟粉虱具有明显的抗生性。
[Objectives] To compare the population growth of Bemisia tabaci （Gennadius） on different pepper varieties by establishing the correlation between the content of the leaves of each variety and the population size of B. tabaci. [Methods] The population trend index （I） of whiteflies feeding on different varieties of peppers was calculated, and the quantity of soluble sugar, soluble protein, free proline, phenolic compounds and flavonoids, in pepper leaves, measured. The correlation between whitefly population size and leaf content was analyzed. [Results] There were significant differences in the size of whitefly populations that fed on different varieties of peppers. Insect-resistant varieties had significantly higher amounts of soluble sugar, phenolic compounds and flavonoids, but lower soluble protein and free proline, than susceptible varieties. I was significantly, negatively correlated with soluble sugar, phenolic compounds and flavonoids, and significantly, positively correlated with soluble protein and free proline. Among the factors measured, soluble sugar had the most important effect on I. Multiple regression analysis was used to model the relationship between I and five factors; soluble sugar （X1）, soluble protein （X2）, free proline （X3）, phenolic compounds （X4） and flavonoids （X5）. The regression equation was： Y = 47.801– 1.754X1＋1.206 X2＋1.108 X3 –0.437 X4 –0.649 X5 （R2 = 0.688）. [Conclusion] Insect-resistant pepper varieties had significantly lower whitefly populations than susceptible varieties.
出处
《应用昆虫学报》
CAS
CSCD
北大核心
2017年第4期629-638,共10页
Chinese Journal of Applied Entomology
基金
江苏省科技支撑项目(BE2017347)
江苏省农业科技自主创新资金(cx(15)1041
CX(12)1004)
江苏省农业三新工程项目(SXGC[20161029
SXGC[2016]057)
苏州市2015年度产业技术创新专项资金(农业科技创新工程)(SNG201504)
