Department of Entomology, North Carolina State University, 27695-7630, Raleigh, North Carolina.
J Chem Ecol. 1991 May;17(5):989-1005. doi: 10.1007/BF01395604.
The role of the steroidal glycoalkaloid α-tomatine in the hostplant resistance of tomato to the Colorado potato beetle,Leptinotarsa decemlineata (Say) was examined in short- (24 hr; using first- and fourth-instar larvae) and long-term (first-instar larvae reared through the prepupal stage) feeding experiments. Consumption rate, growth rate, efficiency of conversion of ingested food to body mass, and survival were compared forL. decemlineata provided foliage from susceptible (Lycopersicon esculetum Mill. cv. Walter), resistant (L. hirsutum f.Glabratum C.H. Mull accession PI 134417), and F1 hybrid plants. Values obtained for dietetic indices were regressed against corresponding values for α-tomatine content of foliage provided to larvae. Differences in dietetic indices could not be attributed to variation in foliar α-tomatine content despite a long-standing literature showing theex planta α-tomatine inhibits feeding and growth byL. decemlineata.
茄碱在番茄对马铃薯甲虫（Leptinotarsa decemlineata（Say））的寄主植物抗性中的作用在短期（24 小时；使用第一和第四龄幼虫）和长期（第一龄幼虫饲养至预蛹期）喂养实验中进行了研究。比较了提供来自易感（Lycopersicon esculetum Mill. cv. Walter）、抗性（L. hirsutum f.Glabratum C.H. Mull accession PI 134417）和 F1 杂种植物叶片的马铃薯甲虫的取食率、生长率、摄入食物转化为体重的效率和存活率。饮食指标的值与提供给幼虫的叶片中茄碱含量的相应值进行了回归。尽管长期以来的文献表明，离体茄碱抑制马铃薯甲虫的取食和生长，但饮食指标的差异不能归因于叶片中茄碱含量的变化。
