Spatial organization of the glucosinolate-myrosinase system in brassica specialist aphids is similar to that of the host plant

被引:125
作者
Bridges, M
Jones, AME
Bones, AM
Hodgson, C
Cole, R
Bartlet, E
Wallsgrove, R
Karapapa, VK
Watts, N
Rossiter, JT [1 ]
机构
[1] Univ London, Imperial Coll Wye, Dept Agr Sci, Ashford TN25 5AH, Kent, England
[2] Norwegian Univ Sci & Technol, Fac Chem & Biol, Dept Bot, N-7491 Trondheim, Norway
[3] Hort Res Int Wellesbourne, Warwick CV35 9EF, England
[4] Inst Arable Crop Res Rothamsted, Harpenden AL5 2JQ, Herts, England
关键词
thioglucosides (glucosinolates); thioglucoside glucohydrolase (EC 3.2.1 myrosinase); Brevicoryne brassicae; aphid; immunolocalization;
D O I
10.1098/rspb.2001.1861
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Secondary metabolites are important in plant defence against pests and diseases. Similarly, insects can use plant secondary metabolites in defence and, in some cases, synthesize their own products. The paper describes how two specialist brassica feeders, Brevicoryne brassicae (cabbage aphid) and Lipaphis erysimi (turnip aphid) can sequester glucosinolates (thioglucosides) from their host plants, yet avoid the generation of toxic degradation products by compartmentalizing myrosinase (thioglucosidase) into crystalline microbodies. We propose that death, or damage, to the insect by predators or disease causes disruption of compartmentalized myrosinase, which results in the release of isothiocyanate that acts as a synergist for the alarm pheromone E-beta-farnesene.
引用
收藏
页码:187 / 191
页数:5
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