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Physiological Responses of the Potato Tuberworm (Phthorimaea operculella) to Potato (Solanum tuberosum) Germplasm
American Journal of Potato Research ( IF 1.5 ) Pub Date : 2021-06-18 , DOI: 10.1007/s12230-021-09834-3
Seyed Mozaffar Mansouri , Silvia I. Rondon

The potato tuberworm, Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae), is an important field and storage pest of potato Solanum tuberosum L. Feeding indices and midgut digestive protease and amylase enzyme activities were measured under laboratory conditions in P. operculella larvae reared on leaves of eight potato genotypes including Agria, Ausonia, Khavaran, Kondor, Morene, Satina, Savalan, Sprint, and two Iranian potato selections PI396124 and PI397082–2. The highest amounts efficiency of conversion of ingested food, and efficiency of conversion of digested food, were recorded in larvae reared on Savalan, and the lowest amount of these indices found on Khavaran, Agria, and PI397082–2. There were significant positive correlations between coefficients of P. operculella with midgut protease enzyme activity, and no significant correlations between the indices and midgut amylase enzyme activity. Among tested potato genotypes, the highest proteolytic activity was found on Savalan (6.6 ± 0.07 U/mg), and the lowest activity observed on Khavaran (4.4 ± 0.09 Umg −1) and Agria (4.4 ± 0.14 Umg −1).



中文翻译:

马铃薯结节虫(Phthorimaea operculella)对马铃薯(Solanum tuberosum)种质的生理反应

马铃薯结节虫Phthorimaea operculella (Zeller)(鳞翅目:Gelechiidae)是马铃薯Solanum tuberosum L的重要田间和贮藏害虫。在实验室条件下测定了P. operculella 的摄食指数和中肠消化蛋白酶和淀粉酶活在八种马铃薯基因型的叶子上饲养的幼虫,包括 Agria、Ausonia、Khavaran、Kondor、Morene、Satina、Savalan、Sprint 和两个伊朗马铃薯选择 PI396124 和 PI397082-2。在 Savalan 饲养的幼虫中记录的摄入食物转化效率和消化食物转化效率最高,而在 Khavaran、Agria 和 PI397082-2 上发现的这些指数中最低。P. operculella系数之间存在显着正相关与中肠蛋白酶活性,指标与中肠淀粉酶活性无显着相关性。在测试的马铃薯基因型中,在 Savalan (6.6 ± 0.07 U/mg) 上发现了最高的蛋白水解活性,在 Khavaran (4.4 ± 0.09 Umg -1) 和 Agria (4.4 ± 0.14 Umg -1) 上观察到的活性最低。

更新日期:2021-06-18
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