University of Illinois at Urbana-Champaign
Disposition of Cucurbitacin as a Factor in Host Plant Selection by Diabroticite Beetles and Electrophoretic Analysis of the Coevolved Genus Cucurbita
Abstract
dc:descriptionFive species of Diabroticites with different host plant affinities produced an essentially identical array of metabolites when fed radio-labeled cucurbitacin B. All species excreted the bulk of the cucurbitacin (67.17-94.59% total dpm); permanently sequestered a small proportion of a cucurbitacin D conjugate in the hemolymph (0.98-2.76%); and apportioned the remainder between the gut, the body and the eggs (when present). Markedly different ratios between the excretory metabolites, i.e., polar vs. unmetabolized cucurbitacin, suggest that Diabrotica virgifera virgifera, a grass specialist, and Acalymma vittatum, a cucurbit specialist, have lower rates of metabolic alteration than D. undecimpunctata howardi and D. balteata which are polyphagous and D. cristata.
Degree
thesis:*- Name thesis:degree_name
- Ph.D.
- Level thesis:degree_level
- Dissertation
- Discipline thesis:degree_discipline
- Horticulture
- Grantor
- University of Illinois at Urbana-Champaign
- Year dc:date
- 2014
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
-
- Ferguson, Jane Ellen
Subjects
dc:subject × 1Identifiers
dc:identifier.*- Identifier
- (UMI)AAI8521763
- OAI identifier oai:identifier
- oai:www.ideals.illinois.edu:2142/71776