CUCURBITACINS - PLANT-DERIVED DEFENSE COMPOUNDS FOR DIABROTICITES (COLEOPTERA, CHRYSOMELIDAE)

被引:113
作者
FERGUSON, JE [1 ]
METCALF, RL [1 ]
机构
[1] UNIV ILLINOIS, DEPT ENTOMOL, URBANA, IL 61801 USA
关键词
D O I
10.1007/BF01411417
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Four species of diabroticites with different host specificities are shown for the first time to sequester cucurbitacins. While all beetles fed on an artificial diet (no cucurbitacins) were readily consumed by Chinese praying mantids [Tenodera aridifolia sinensis] a significant proportion of adult Diabrotica balteata (72%), D. undecimpunctata howardi (46%), and D. virgifera virgifera (24%) fed on squash fruit containing cucurbitacins B and D were rejected. Moreover, even when adults did not feed on cucurbitacins, 21-24% of Acalymma vittatum were rejected by the mantids which is consistent with larval sequestration of cucurbitacins. The mantids failed to learn to avoid any of the beetle species despite adverse effects associated with ingestion, i.e., uncoordination, regurgitation, etc. A cucurbitacin D metabolite accumulated and was sequestered for extended periods of time in the hemolymph of all 4 species. In addition, female beetles that had ingested cucurbitacins laid eggs containing substantial amounts of cucurbitacins.
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页码:311 / 318
页数:8
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