Results 171 to 180 of about 6,659 (211)
Cannibalism in the pea aphid,Acyrthosiphon pisum
Insect Science, 2014 Previous observations of cannibalism have been made in the aphid Acyrthosiphon pisum (L.): this article seeks to quantify factors contributing to such behaviors.
Camille Desjonquères, Simon R Leather
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Melatonin and the pea aphid, Acyrthosiphon pisum
Journal of Insect Physiology, 1997Pea aphids, Acyrthosiphon pisum, were fed on artificial diet containing various concentrations of melatonin. Under long-day conditions (16h light:8h dark) their progeny included males and virginoparous/oviparous (asexual/sexual) intermediate females, which normally occur only in short days or around critical night-length.
J, Hardie, N, Gao
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Lipid metabolism in the symbiotes of the pea aphid, Acyrthosiphon pisum
Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1976Abstract 1. 1. The synthesis of lipids in the primary symbiote of the pea aphid was examined. The amount of radioactive acetate incorporated into the symbiote lipid fraction in vitro was found to increase as the concentration of symbiotes in culture decreased. 2. 2.
E J, Houk, G W, Griffiths, S D, Beck
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The economics of escape behaviour in the pea aphid, Acyrthosiphon pisum
Oecologia, 1990Pea aphids have several alternative responses to the detection of alarm pheromone produced by conspecifics. One of these, dropping from the feeding site to the ground, is potentially costly owing to the risk of desiccation-induced mortality on the ground before another host plant can be reached.
Lawrence M, Dill +2 more
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Mitochondrial DNA diversity in the pea aphid Acyrthosiphon pisum
Genome, 1994The pea aphid Acyrthosiphon pisum has been established in North America for at least a century and occurs on a broad range of host plants. Despite its importance as a crop pest, there is little understanding of the genetic structure of its populations or the extent of genetic divergence associated with different host plant utilization.
R J, Barrett +3 more
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The physiology of sterol nutrition in the pea aphid Acyrthosiphon pisum
Journal of Insect Physiology, 2012The phloem sap of fava bean (Vicia faba) plants utilized by the pea aphid Acyrthosiphon pisum contains three sterols, cholesterol, stigmasterol and sitosterol, in a 2:2:1 ratio. To investigate the nutritional value of these sterols, pea aphids were reared on chemically-defined diets containing each sterol at 0.1, 1 and 10μgml(-1) with a sterol-free ...
Sophie, Bouvaine +5 more
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Characterisation of immune responses in the pea aphid, Acyrthosiphon pisum
Journal of Insect Physiology, 2011The innate immune system of insects provides effective defence against a range of parasites and pathogens. The pea aphid, Acyrthosiphon pisum, is a novel study system for investigating host-parasite interactions due to its complex associations with both well-characterised bacterial symbionts and a diversity of pathogens and parasites, including several
Alice M, Laughton +4 more
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Neuropeptide and neurohormone precursors in the pea aphid, Acyrthosiphon pisum
Insect Molecular Biology, 2010Abstract Aphids respond to environmental changes by developing alternative phenotypes with differing reproductive modes. Parthenogenetic reproduction occurs in spring and summer, whereas decreasing day lengths in autumn provoke the production of sexual forms.
Huybrechts, Jurgen +8 more
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The Wnt pathway regulates wing morph determination in Acyrthosiphon pisum
Insect Biochemistry and Molecular Biology, 2023Wing dimorphism occurs in insects as a survival strategy to adapt to environmental changes. In response to environmental cues, mother aphids transmit signals to their offspring, and the offspring either emerge as winged adults or develop as wingless adults with degeneration of the wing primordia in the early instar stage. However, how the wing morph is
Ping Zhou +5 more
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Intracellular symbiotes of the pea aphid, Acyrthosiphon pisum
Journal of Insect Physiology, 1973Histological and ultrastructural studies on the mycetome of the pea aphid, Acyrthosiphon pisum, disclosed two types of symbiotes. The more common primary symbiotes were oval in shape and were found in large mycetocytes making up the bulk of the mycetome.
Gareth W. Griffiths, Stanley D. Beck
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