Allylglucosinolate and Herbivorous Caterpillars: A Contrast in Toxicity and Tolerance

Blau, Patricia A.; Feeny, Paul; Contardo, Lorraine; Robson, D. S.

doi:10.1126/science.200.4347.1296

Cited by 264 publications

(169 citation statements)

References 21 publications

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“…Herbivory by a specialist insect, P. xylostella, was unaffected by the allelic state at GS-Elong. This is consistent with studies demonstrating that generalist insects are sensitive toward glucosinolate-based plant defenses, whereas specialists may be able to cope with these compounds (16,20,21). Moreover, feeding and oviposition of crucifer specialist insects may be stimulated by glucosinolates and their degradation products (21,22).…”

Section: Discussionsupporting

confidence: 90%

Evolutionary dynamics of an Arabidopsis insect resistance quantitative trait locus

Kroymann

Donnerhacke

Schnabelrauch

et al. 2003

Proc. Natl. Acad. Sci. U.S.A.

239

274

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Glucosinolate profiles differ among Arabidopsis thaliana ecotypes, caused by the composition of alleles at several glucosinolate biosynthetic loci. One of these, GS-Elong, harbors a family of methylthioalkylmalate synthase (MAM) genes that determine the side chain length of aliphatic glucosinolate structures. Fine mapping reveals that GS-Elong constitutes an insect resistance quantitative trait locus, caused by variation in glucosinolate profiles conferred by polymorphism of MAM alleles in this region. A sequence survey of randomly chosen ecotypes indicates that GSElong is highly variable among A. thaliana ecotypes: indel polymorphisms are frequent, as well as gene conversion events between gene copies arranged in tandem. Furthermore, statistical methods of molecular population genetics suggest that one of the genes, MAM2, is subject to balancing selection. This may be caused by ecological tradeoffs, i.e., by contrasting physiological effects of glucosinolates on generalist vs. specialist insects.

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Section: Discussionsupporting

confidence: 90%

Evolutionary dynamics of an Arabidopsis insect resistance quantitative trait locus

Kroymann

Donnerhacke

Schnabelrauch

et al. 2003

Proc. Natl. Acad. Sci. U.S.A.

239

274

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“…While the toxicity of glucosinolate metabolites from Brassicaceae plants is well known (Blau et al,1978;Erickson & Feeny, 1974), the influence of these sub stances on predators through aphid prey has still to be studied. The biological effect of Brassicaceae (including allelochemicals as glucosinolates/isothiocyanates) on both specialist/generalist aphid species (changes of reproduc tive rates of B. brassicae and M. persicae) has been con firmed here and extended to aphidophagous predators.…”

Section: Discussionmentioning

confidence: 99%

Influence of host plants on specialist / generalist aphids and on the development of Adalia bipunctata (Coleoptera: Coccinellidae)

Francis¹,

Haubruge²,

Gaspar³

2000

Eur. J. Entomol.

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Abstract. The aim of this work was to determine the impact of allelochemicals (glucosinolates/isothiocyanates) from Brassicaceae (Brassica napus and Sinapis alba) at two trophic levels in relation to biological control efficacy. The impact of these plants on aphid Myzus persicae (Sulzer) and Brevicoryne brassicae (L.) and ladybird Adalia bipunctata (L.) biology can be assessed by observation of several developmental parameters: mortality, development duration and adult weight. Sub-lethal toxicity can also be measured through the reproductive parameters of fecundity and/or egg viability. While both specialist and generalist aphids were positively influenced by Brassicaceae species, mixed effects are recorded in ladybird performances following the aphid species/host plant com binations. Significant differences appeared according to aphid host plant and aphid species. This work enhanced the influence of Brassicaceae plants either as cultivated species (B. napus) or as set-aside (S. alba) on both pests and beneficial insects. The allelochemical presence in plants must be taken into account in programs of integrated pest management due to their direct influence on biological control agents.

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“…In contrast, the generalist M. configurata strongly preferred (by fivefold) to feed on the line of B. juncea with the lowest concentration of sinigrin. Contrasting toxicities of sinigrin for specialist and generalist feeders have been described by Blau et al (1978). Sinigrin is acutely toxic to larvae of Papilio polyxenes which do not normally attack crucifers but larvae of the crucifer specialist Pieris rapae are not affected even by artificially high concentrations of sinigrin.…”

Section: Discussionmentioning

confidence: 99%

“…The unquestioning acceptance of this wide-ly held point of view has been criticized by Chew (1988). Most researchers now think that the influence of glucosinolates, if any, on the interaction of insects with their hosts must be examined on a case-by-case basis, with consideration being given to the generalist/specialist status of the pest (Blau et al 1978), the types and concentrations of glucosinolates and their breakdown products and the developmental stage of the plant and the tissue(s) being fed upon (Bodnaryk and Palaniswamy 1990;Bodnaryk 1991 …”

mentioning

confidence: 99%

Will low-glucosinolate cultivars of the mustards Brassica juncea and Sinapis alba be vulnerable to insect pests?

Bodnaryk¹

1997

Can. J. Plant Sci.

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Will low-glucosinolate cultivars of the mustards Brassica juncea and Sinapis alba be vulnerable to insect pests? Can J. Plant Sci. 77: 283-287. Foliar concentrations of the predominant glucosinolates in the mustards B. juncea (allyl glucosinolate, sinigrin) and S. alba (p-hydroxybenzyl glucosinolate, sinalbin) were determined in lines that had been selected in breeding programs for low levels of glucosinolates in their seeds for the oilseed market. The glucosinolate concentrations found in the cotyledons and leaves of the selected lines were also low, often by three or more orders of magnitude, compared with the unselected parent. The flea beetle, Phyllotreta cruciferae Goeze, and the diamondback moth, Plutella xylostella (L.), (both crucifer specialists) fed at equal rates on B. juncea and its low-glucosinolate lines, indicating that these species are insensitive to sinigrin and suggesting that their pest status on low-glucosinolate lines of B. juncea will likely remain unchanged. By contrast, the bertha armyworm, Mamestra configurata Wlk. (a generalist) fed up to fivefold more on the leaves of low-glucosinolate lines, suggesting that its pest status on low-glucosinolate B. juncea is likely to worsen relative to the mustard B. juncea. Flea beetles, diamondback moth, and the bertha armyworm fed at equal rates on the mustard S. alba and a low-glucosinolate line indicating that the status of these pests on low-glucosinolate S. alba will unlikely be much different from the mustard S. alba.Lines of S. alba differing in their sinalbin concentration by 1000-fold had equal levels of antixenosis resistance in their cotyledons against flea beetles, leaving little doubt that this resistance is independent of glucosinolates. Flea beetle resistance was also detected in the cotyledons of a low-glucosinolate line of B. juncea. The resistance was not detected in the parental line or in another low-glucosinolate line and appears to have arisen fortuitously during crossing and selection. Since resistance occurs in a line with concentrations of sinigrin three or more orders of magnitude lower than non-resistant lines, this resistance is also unlikely to be glucosinolate based. The mustards S. alba and B. juncea are a useful source of cotyledon resistance against flea beetles that is compatible with the aims of oilseed breeding. , montrant que les deux espèces sont indifférentes à la présence de la sinigrine et que, par conséquent, elles conserveront vraisemblablement la même visibilité sur les lignées p.g. En revanche, la légionnaire bertha Mamestra configurata Wlk. (plus polyphage) se nourrissait jusqu'à cinq fois plus à même les feuilles des lignées à basse teneur en glucosinolates, ce qui laisse à penser que sa nuisibilité risque d'empirer sur les lignées de ce type, par rapport avec l'espèce d'origine chez Sinapis alba, le degré d'activité des altises, de la fausse-teigne et de la légion-naire bertha était sensiblement équivalent sur l'espèce non sélectionnée et sur sa lignée p.g., montrant que le degré de nuisibilité sur les...

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Allylglucosinolate and Herbivorous Caterpillars: A Contrast in Toxicity and Tolerance

Cited by 264 publications

References 21 publications

Evolutionary dynamics of an Arabidopsis insect resistance quantitative trait locus

Evolutionary dynamics of an Arabidopsis insect resistance quantitative trait locus

Influence of host plants on specialist / generalist aphids and on the development of Adalia bipunctata (Coleoptera: Coccinellidae)

Will low-glucosinolate cultivars of the mustards Brassica juncea and Sinapis alba be vulnerable to insect pests?

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