Biological performance of Colorado potato beetle larvae on potato genotypes with differing levels of polyphenol oxidase |
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| Authors: | P. Castañera J. C. Steffens W. M. Tingey |
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| Affiliation: | (1) Department of Entomology, Cornell University, Tower Rd. Insectary, 14853-2604 Ithaca, New York;(2) Department of Plant Breeding and Biometry, Cornell University, 14853 Ithaca, New York;(3) Departmento de Biologia de Plantas, CSIC, Centro de Investigaciones Biologicas, Velazquez, 144, 28006 Madrid, Spain |
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| Abstract: | ![]()
Two potato genotypes resistant to the Colorado potato beetle (CPB) and three susceptible genotypes were used to investigate the role of total foliar polyphenol oxidase (PPO) on the performance of CPB larvae in long-term feeding assays. A significant positive correlation was found between larval mortality and PPO content in potato foliage. Moreover, a significant negative correlation was also observed between PPO content and larval weight, fecundity, and relative larval growth rate. These results suggest a significant role of PPO in conferring potato resistance to the Colorado potato beetle at least in those clones where the PPO levels were above a certain threshold. |
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| Keywords: | Leptinotarsa decemlineata Colorado potato beetle polyphenol oxidase PPO Solanum berthaultii glandular trichomes plant resistance |
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