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Mondor, Edward B.; Baird, D.S.; Slessor, K. N.; Roitberg, Bernard D.

doi:10.1023/a:1026402229440

Cited by 51 publications

(2 citation statements)

References 17 publications

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“…The methods of Mondor et al . 57 and Fischer and Lognay 58 were combined for the quantitative analysis of cornicle secretions. The aphid was stimulated to produce droplet from the cornicle by pressing the dorsum gently with an insect pin under a dissecting microscope.…”

Section: Methodsmentioning

confidence: 99%

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Host plants and obligate endosymbionts are not the sources for biosynthesis of the aphid alarm pheromone

Sun

2017

Sci Rep

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(E)-β-farnesene (EβF) is the major component of the alarm pheromone of many aphid species, but where EβF is synthesized in aphids is only partly understood. There are at least three most possible sources for the alarm pheromone: host plants, aphid obligate endosymbiont and aphids themselves. Here we eliminated the possibility of host plants and the obligate endosymbiont Buchnera aphidicola as the sources for EβF released by aphids. We excluded the possible effects of host plants on EβF biosynthesis by rearing aphids on non-plant diets. Both the diet-reared aphids, including the cotton aphid Aphis gossypii and the green peach aphid Myzus persicae, could still release EβF based on solid-phase micro-extraction combined with gas chromatography-mass spectrometer analysis. Meanwhile, we treated host aphids with antibiotics to fully eliminate Buchnera bacteria. Though the treatment seriously affected the development and fecundity of host aphids, the treated aphids could still release EβF, and there was no significant difference in the EβF concentration as per the aphid weight under different rearing conditions. Taken together, our experimental results suggest that host plants and obligate endosymbionts are not the sources for EβF released by aphids, indicating that it is most probably the aphid itself synthesizes the alarm pheromone.

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Section: Methodsmentioning

confidence: 99%

“…Samples were maintained at −20 °C until analysis. One microliter of sample was injected in Perkin Elmer Clarus 600 for GC-MS analysis by using the methods described 57, 58 . If an aphid did not produce any cornicle fluid, it was placed in another 1.5-ml centrifuge tube for weighting.…”

Section: Methodsmentioning

confidence: 99%

Host plants and obligate endosymbionts are not the sources for biosynthesis of the aphid alarm pheromone

Sun

2017

Sci Rep

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Aphid Biodiversity under Environmental Change

Kindlmann¹,

Dixon²,

Michaud³

2010

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Springer is part of Springer Science+Business Media (www.springer.com) v vi Preface effects on aphid biology, and indirectly through effects on plants and natural enemies. However, any sustained shift in prevailing wind patterns associated with atmospheric warming could generate an unpredictable cascade of ecological consequences for both agriculture and cereal aphids, mediated largely by changes in rainfall patterns and migration pathways, respectively.Qureshi considers the impact of increasing temperature on the aphid species Toxoptera citricida, a cosmopolitan pest of citrus and a highly efficient vector of citrus tristeza virus. He concludes that the negative impact of rising temperatures on T. citricida populations may be more pronounced in the south than elsewhere due to the relatively higher temperatures there, with more beneficial effects evident in the north.Clement et al. investigate the history of pea aphid outbreaks in the U.S. Pacific Northwest. Various abiotic and biotic factors and their possible controlling influence on changes in pea aphid densities, with emphasis on winter temperatures within the context of climate change, are presented and discussed.Dixon and Hopkins study the mechanisms of coexistence of several aphid species on the same host plant. Using data on five species of aphids coexisting on the leaves of birch and indicate that the temporal patterns in their reproductive activity are associated with differences in their thermal tolerances.Roy and Majerus deal with the role of ladybirds in the changing world. They conclude that it is difficult to assess the impact that anthropogenic factors will have on most species of coccinellid but logic suggests that the direct anthropogenic drivers of environmental change, both individually and in concert, will be highly deleterious to all but the most adaptable and eurytopic coccinellids.Aphids have evolved a particular form of inducible anti-predator behaviour that involves the emission of alarm pheromone. Outreman et al. show that alarm signaling in aphids is associated with the ecological cost of attracting additional natural enemies and demonstrate that a full understanding of the evolution of inducible defenses has to consider a species' complete network of ecological interactions.This book fills a significant gap in the recent literature: while there are several books on aphid biology and ecology and their importance as crop pests (Dixon

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