Body condition constrains immune function in field populations of female Australian plague locust Chortoicetes terminifera

R. I. Graham, J. M. Deacutis, S. J. Simpson, K. Wilson

Research output: Contribution to journalJournal Article

9 Citations (Scopus)

Abstract

The insect innate immune system comprises both humoral and cellular defence responses. In the laboratory, the insect immune system is well characterised. In the field however, little is known about the role of constitutive insect immune function and how it varies within and between populations. Laboratory studies suggest that host nutrition has significant impact upon insect immune function. Thus, the rationale for this study was to sample natural populations of the Australian Plague Locust Chortoicetes terminifera to establish whether locust body condition (as determined by protein and lipid content) impacted their constitutive immune system, and as a result, has the potential to impact on their capacity to respond to a pathogenic challenge. We found that body-condition varied greatly between individual female locusts within sites and that haemolymph protein levels, but not body lipid content, varied between sites. Moreover, our measures of immune function were correlated with the haemolymph levels of protein (in the case of haemocyte density), lipid (prophenoloxidase activity) or both (lysozyme-like antimicrobial activity). We discuss the implications of these findings for the role of biological pesticides in the control of locust populations. This article is protected by copyright. All rights reserved.
Original languageEnglish
Pages (from-to)233-241
Number of pages9
JournalParasite Immunology
Volume37
Issue number5
DOIs
Publication statusPublished - 1 May 2015
Externally publishedYes

Fingerprint

Grasshoppers
Plague
Insects
Immune System
Hemolymph
Lipids
Population
Biological Control Agents
Hemocytes
Proteins
Muramidase

Keywords

  • Australian plague locust
  • Chortoicetes terminifera
  • Ecological immunology
  • Immune function
  • Nutrition ecology

Cite this

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title = "Body condition constrains immune function in field populations of female Australian plague locust Chortoicetes terminifera",
abstract = "The insect innate immune system comprises both humoral and cellular defence responses. In the laboratory, the insect immune system is well characterised. In the field however, little is known about the role of constitutive insect immune function and how it varies within and between populations. Laboratory studies suggest that host nutrition has significant impact upon insect immune function. Thus, the rationale for this study was to sample natural populations of the Australian Plague Locust Chortoicetes terminifera to establish whether locust body condition (as determined by protein and lipid content) impacted their constitutive immune system, and as a result, has the potential to impact on their capacity to respond to a pathogenic challenge. We found that body-condition varied greatly between individual female locusts within sites and that haemolymph protein levels, but not body lipid content, varied between sites. Moreover, our measures of immune function were correlated with the haemolymph levels of protein (in the case of haemocyte density), lipid (prophenoloxidase activity) or both (lysozyme-like antimicrobial activity). We discuss the implications of these findings for the role of biological pesticides in the control of locust populations. This article is protected by copyright. All rights reserved.",
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Body condition constrains immune function in field populations of female Australian plague locust Chortoicetes terminifera. / Graham, R. I.; Deacutis, J. M.; Simpson, S. J.; Wilson, K.

In: Parasite Immunology, Vol. 37, No. 5, 01.05.2015, p. 233-241.

Research output: Contribution to journalJournal Article

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AB - The insect innate immune system comprises both humoral and cellular defence responses. In the laboratory, the insect immune system is well characterised. In the field however, little is known about the role of constitutive insect immune function and how it varies within and between populations. Laboratory studies suggest that host nutrition has significant impact upon insect immune function. Thus, the rationale for this study was to sample natural populations of the Australian Plague Locust Chortoicetes terminifera to establish whether locust body condition (as determined by protein and lipid content) impacted their constitutive immune system, and as a result, has the potential to impact on their capacity to respond to a pathogenic challenge. We found that body-condition varied greatly between individual female locusts within sites and that haemolymph protein levels, but not body lipid content, varied between sites. Moreover, our measures of immune function were correlated with the haemolymph levels of protein (in the case of haemocyte density), lipid (prophenoloxidase activity) or both (lysozyme-like antimicrobial activity). We discuss the implications of these findings for the role of biological pesticides in the control of locust populations. This article is protected by copyright. All rights reserved.

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