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Melanism and disease resistance in insects.

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Melanism and disease resistance in insects. / Wilson, Kenneth; Cotter, Sheena C.; Reeson, Andrew F.; Pell, Judith K.

In: Ecology Letters, Vol. 4, No. 6, 11.2001, p. 637-649.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Wilson, K, Cotter, SC, Reeson, AF & Pell, JK 2001, 'Melanism and disease resistance in insects.', Ecology Letters, vol. 4, no. 6, pp. 637-649. https://doi.org/10.1046/j.1461-0248.2001.00279.x

APA

Wilson, K., Cotter, S. C., Reeson, A. F., & Pell, J. K. (2001). Melanism and disease resistance in insects. Ecology Letters, 4(6), 637-649. https://doi.org/10.1046/j.1461-0248.2001.00279.x

Vancouver

Wilson K, Cotter SC, Reeson AF, Pell JK. Melanism and disease resistance in insects. Ecology Letters. 2001 Nov;4(6):637-649. https://doi.org/10.1046/j.1461-0248.2001.00279.x

Author

Wilson, Kenneth ; Cotter, Sheena C. ; Reeson, Andrew F. ; Pell, Judith K. / Melanism and disease resistance in insects. In: Ecology Letters. 2001 ; Vol. 4, No. 6. pp. 637-649.

Bibtex

@article{fa102ab9c45b4913ab7316dfe042ff37,
title = "Melanism and disease resistance in insects.",
abstract = "There is growing evidence that insects in high-density populations invest relatively more in pathogen resistance than those in low-density populations (i.e. density-dependent prophylaxis). Such increases in resistance are often accompanied by cuticular melanism, which is characteristic of the high-density form of many phase polyphenic insects. Both melanism and pathogen resistance involve the prophenoloxidase enzyme system. In this paper the link between resistance, melanism and phenoloxidase activity is examined in Spodoptera larvae. In S. exempta, cuticular melanism was positively correlated with phenoloxidase activity in the cuticle, haemolymph and midgut. Melanic S. exempta larvae were found to melanize a greater proportion of eggs of the ectoparasitoid Euplectrus laphygmae than non-melanic larvae, and melanic S. littoralis were more resistant to the entomopathogenic fungus Beauveria bassiana (in S. exempta the association between melanism and fungal resistance was non-signficant). These results strengthen the link between melanism and disease resistance and implicate the involvement of phenoloxidase.",
author = "Kenneth Wilson and Cotter, {Sheena C.} and Reeson, {Andrew F.} and Pell, {Judith K.}",
year = "2001",
month = nov,
doi = "10.1046/j.1461-0248.2001.00279.x",
language = "English",
volume = "4",
pages = "637--649",
journal = "Ecology Letters",
issn = "1461-023X",
publisher = "Wiley",
number = "6",

}

RIS

TY - JOUR

T1 - Melanism and disease resistance in insects.

AU - Wilson, Kenneth

AU - Cotter, Sheena C.

AU - Reeson, Andrew F.

AU - Pell, Judith K.

PY - 2001/11

Y1 - 2001/11

N2 - There is growing evidence that insects in high-density populations invest relatively more in pathogen resistance than those in low-density populations (i.e. density-dependent prophylaxis). Such increases in resistance are often accompanied by cuticular melanism, which is characteristic of the high-density form of many phase polyphenic insects. Both melanism and pathogen resistance involve the prophenoloxidase enzyme system. In this paper the link between resistance, melanism and phenoloxidase activity is examined in Spodoptera larvae. In S. exempta, cuticular melanism was positively correlated with phenoloxidase activity in the cuticle, haemolymph and midgut. Melanic S. exempta larvae were found to melanize a greater proportion of eggs of the ectoparasitoid Euplectrus laphygmae than non-melanic larvae, and melanic S. littoralis were more resistant to the entomopathogenic fungus Beauveria bassiana (in S. exempta the association between melanism and fungal resistance was non-signficant). These results strengthen the link between melanism and disease resistance and implicate the involvement of phenoloxidase.

AB - There is growing evidence that insects in high-density populations invest relatively more in pathogen resistance than those in low-density populations (i.e. density-dependent prophylaxis). Such increases in resistance are often accompanied by cuticular melanism, which is characteristic of the high-density form of many phase polyphenic insects. Both melanism and pathogen resistance involve the prophenoloxidase enzyme system. In this paper the link between resistance, melanism and phenoloxidase activity is examined in Spodoptera larvae. In S. exempta, cuticular melanism was positively correlated with phenoloxidase activity in the cuticle, haemolymph and midgut. Melanic S. exempta larvae were found to melanize a greater proportion of eggs of the ectoparasitoid Euplectrus laphygmae than non-melanic larvae, and melanic S. littoralis were more resistant to the entomopathogenic fungus Beauveria bassiana (in S. exempta the association between melanism and fungal resistance was non-signficant). These results strengthen the link between melanism and disease resistance and implicate the involvement of phenoloxidase.

U2 - 10.1046/j.1461-0248.2001.00279.x

DO - 10.1046/j.1461-0248.2001.00279.x

M3 - Journal article

VL - 4

SP - 637

EP - 649

JO - Ecology Letters

JF - Ecology Letters

SN - 1461-023X

IS - 6

ER -