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Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis.

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Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis. / Cotter, S. C.; Myatt, J. P.; Benskin, Clare et al.

In: Journal of Evolutionary Biology, Vol. 21, No. 6, 11.2008, p. 1744-1754.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Cotter SC, Myatt JP, Benskin C, Wilson K. Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis. Journal of Evolutionary Biology. 2008 Nov;21(6):1744-1754. doi: 10.1111/j.1420-9101.2008.01587.x

Author

Cotter, S. C. ; Myatt, J. P. ; Benskin, Clare et al. / Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis. In: Journal of Evolutionary Biology. 2008 ; Vol. 21, No. 6. pp. 1744-1754.

Bibtex

@article{72d9b340c2cb4e99a8ebbc234268095b,
title = "Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis.",
abstract = "Several insect species show an increase in cuticular melanism in response to high densities. In some species, there is evidence that this melanism is correlated with an up-regulation of certain immune system components, particularly phenoloxidase (PO) activity, and with the down-regulation of lysozyme activity, suggesting a trade-off between the two traits. As melanism has a genetic component, we selected both melanic and nonmelanic lines of the phase-polyphenic lepidopteran, Spodoptera littoralis, in order to test for a causative genetic link between melanism, PO activity and lysozyme activity, and to establish if there are any life-history costs associated with the melanic response. We found that, in fact, melanic lines had lower PO activity and higher lysozyme activity than nonmelanic lines, confirming a genetic trade-off between the two immune responses, but also indicating a genetic trade-off between melanism and PO activity. In addition, we found that lines with high PO activity had slower development rates suggesting that investment in PO, rather than in melanism, is costly.",
keywords = "ecological immunology, host–parasite interaction , insect , Lepidoptera , lysozyme , melanism , phenoloxidase , phenotypic plasticity , selection , trade-offs",
author = "Cotter, {S. C.} and Myatt, {J. P.} and Clare Benskin and Ken Wilson",
year = "2008",
month = nov,
doi = "10.1111/j.1420-9101.2008.01587.x",
language = "English",
volume = "21",
pages = "1744--1754",
journal = "Journal of Evolutionary Biology",
issn = "1010-061X",
publisher = "Wiley-Blackwell",
number = "6",

}

RIS

TY - JOUR

T1 - Selection for cuticular melanism reveals immune function and life-history trade-offs in Spodoptera littoralis.

AU - Cotter, S. C.

AU - Myatt, J. P.

AU - Benskin, Clare

AU - Wilson, Ken

PY - 2008/11

Y1 - 2008/11

N2 - Several insect species show an increase in cuticular melanism in response to high densities. In some species, there is evidence that this melanism is correlated with an up-regulation of certain immune system components, particularly phenoloxidase (PO) activity, and with the down-regulation of lysozyme activity, suggesting a trade-off between the two traits. As melanism has a genetic component, we selected both melanic and nonmelanic lines of the phase-polyphenic lepidopteran, Spodoptera littoralis, in order to test for a causative genetic link between melanism, PO activity and lysozyme activity, and to establish if there are any life-history costs associated with the melanic response. We found that, in fact, melanic lines had lower PO activity and higher lysozyme activity than nonmelanic lines, confirming a genetic trade-off between the two immune responses, but also indicating a genetic trade-off between melanism and PO activity. In addition, we found that lines with high PO activity had slower development rates suggesting that investment in PO, rather than in melanism, is costly.

AB - Several insect species show an increase in cuticular melanism in response to high densities. In some species, there is evidence that this melanism is correlated with an up-regulation of certain immune system components, particularly phenoloxidase (PO) activity, and with the down-regulation of lysozyme activity, suggesting a trade-off between the two traits. As melanism has a genetic component, we selected both melanic and nonmelanic lines of the phase-polyphenic lepidopteran, Spodoptera littoralis, in order to test for a causative genetic link between melanism, PO activity and lysozyme activity, and to establish if there are any life-history costs associated with the melanic response. We found that, in fact, melanic lines had lower PO activity and higher lysozyme activity than nonmelanic lines, confirming a genetic trade-off between the two immune responses, but also indicating a genetic trade-off between melanism and PO activity. In addition, we found that lines with high PO activity had slower development rates suggesting that investment in PO, rather than in melanism, is costly.

KW - ecological immunology

KW - host–parasite interaction

KW - insect

KW - Lepidoptera

KW - lysozyme

KW - melanism

KW - phenoloxidase

KW - phenotypic plasticity

KW - selection

KW - trade-offs

U2 - 10.1111/j.1420-9101.2008.01587.x

DO - 10.1111/j.1420-9101.2008.01587.x

M3 - Journal article

VL - 21

SP - 1744

EP - 1754

JO - Journal of Evolutionary Biology

JF - Journal of Evolutionary Biology

SN - 1010-061X

IS - 6

ER -