Juvenile hormone titres and winged offspring production do not correlate in the pea aphid, Acyrthosiphon pisum

Schwartzberg, Ezra G.; Kunert, Grit; Westerlund, Stephanie A.; Hoffmann, Klaus H.; Weisser, Wolfgang W.

doi:10.1016/j.jinsphys.2008.04.025

Cited by 25 publications

(15 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the finding that the highest abundance of AgIPPS transcripts was detected in adults of both winged and wingless aphids is also in opposition to the early suggestion that JH may be involved in retention of juvenile features in adults and aphid wing polyphenism (Kennedy and Stroyan, 1959). Indeed, there have been reports recently that there was no correlation between JH titre and the proportion of winged offspring in the pea aphid (Schwartzberg et al, 2008a), which could be partially supported by our data at the molecular level.…”

Section: Discussionmentioning

confidence: 68%

Molecular cloning and characterization of a prenyltransferase from the cotton aphid, Aphis gossypii

Sun

Zhang

et al. 2010

Insect Biochemistry and Molecular Biology

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 68%

Molecular cloning and characterization of a prenyltransferase from the cotton aphid, Aphis gossypii

Sun

Zhang

et al. 2010

Insect Biochemistry and Molecular Biology

View full text Add to dashboard Cite

“…Therefore, the immediate M. persicae response to EBF is not simply to walk away, but also includes a massive change in gene expression. These transcriptional changes may also lead to the longer-term changes in aphid development and reproduction that have been observed in other studies of aphids (15,35). Given the large number of gene expression changes in this study and the unknown function of many aphid genes, it is premature to speculate about the role of specific genes in altering aphid behavior.…”

Section: Discussionmentioning

confidence: 79%

Alarm pheromone habituation in Myzus persicae has fitness consequences and causes extensive gene expression changes

Vos

Cheng

Summers

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

In most aphid species, facultative parthenogenetic reproduction allows rapid growth and formation of large single-genotype colonies. Upon predator attack, individual aphids emit an alarm pheromone to warn the colony of this danger. (E)-β-farnesene (EBF) is the predominant constituent of the alarm pheromone in Myzus persicae (green peach aphid) and many other aphid species. Continuous exposure to alarm pheromone in aphid colonies raised on transgenic Arabidopsis thaliana plants that produce EBF leads to habituation within three generations. Whereas naive aphids are repelled by EBF, habituated aphids show no avoidance response. Similarly, individual aphids from the habituated colony can revert back to being EBF-sensitive in three generations, indicating that this behavioral change is not caused by a genetic mutation. Instead, DNA microarray experiments comparing gene expression in naive and habituated aphids treated with EBF demonstrate an almost complete desensitization in the transcriptional response to EBF. Furthermore, EBF-habituated aphids show increased progeny production relative to EBF-responsive aphids, with or without EBF treatment. Although both naive and habituated aphids emit EBF upon damage, EBF-responsive aphids have a higher survival rate in the presence of a coccinellid predator (Hippodamia convergens), and thus outperform habituated aphids that do not show an avoidance response. These results provide evidence that aphid perception of conspecific alarm pheromone aids in predator avoidance and thereby bestows fitness benefits in survivorship and fecundity. Therefore, although habituated M. persicae produce more progeny, EBF-emitting transgenic plants may have practical applications in agriculture as a result of increased predation of habituated aphids.aphid | (E)-beta-farnesene | Hippodamia convergens | microarray | sesquiterpene R apid population growth of aphids is facilitated by their parthenogenetic lifestyle, which often results in the establishment of large single-genotype colonies in the field. In agricultural settings, aphid populations can be controlled with natural enemies such as coccinellid beetles and parasitoid wasps. Despite the effectiveness of biological control, behavioral responses to the threat of predation may allow aphids to persist as pests. Aphid avoidance of predators involves the production of an alarm pheromone. Across a remarkable diversity of aphids, the alarm pheromone contains a mixture of compounds with (E)-β-Farnesene (EBF) as the predominant component (1-3). Detection of EBF results in an array of aphid escape behaviors that, depending on the species and developmental stage, can include flying, walking away, and dropping off the plant.EBF is a volatile sesquiterpene released from cornicles on the aphid's abdomen (4). When an aphid is attacked, it can release EBF in a range of concentrations, depending on the stress that is encountered, as well as the specific species, lineage, and developmental stage of the aphid itself (5-10). EBF-treated Acyrthosiphon pisum do no...

show abstract

“…Previous physiological studies primarily focused on the possible role of another major insect hormone, juvenile hormone, with the hypothesis that a wingless adult is a juvenilized winged adult. A role for juvenile hormone in the wing polyphenism is not ruled out by this study, especially given the complex crosstalk that can occur between the two hormone signaling pathways (41)(42)(43), but to date, no definitive role for juvenile hormone has emerged (7,35,44), although it probably functions in the process of wing development in some aphid species (45,46).…”

Section: Resultsmentioning

confidence: 88%

Ecdysone signaling underlies the pea aphid transgenerational wing polyphenism

Vellichirammal

Gupta

Hall

et al. 2017

Proc. Natl. Acad. Sci. U.S.A.

117

108

View full text Add to dashboard Cite

The wing polyphenism of pea aphids is a compelling laboratory model with which to study the molecular mechanisms underlying phenotypic plasticity. In this polyphenism, environmental stressors such as high aphid density cause asexual, viviparous adult female aphids to alter the developmental fate of their embryos from wingless to winged morphs. This polyphenism is transgenerational, in that the pea aphid mother experiences the environmental signals, but it is her offspring that are affected. Previous research suggested that the steroid hormone ecdysone may play a role in this polyphenism. Here, we analyzed ecdysone-related gene expression patterns and found that they were consistent with a down-regulation of the ecdysone pathway being involved in the production of winged offspring. We therefore predicted that reduced ecdysone signaling would result in more winged offspring. Experimental injections of ecdysone or its analog resulted in a decreased production of winged offspring. Conversely, interfering with ecdysone signaling using an ecdysone receptor antagonist or knocking down the ecdysone receptor gene with RNAi resulted in an increased production of winged offspring. Our results are therefore consistent with the idea that ecdysone plays a causative role in the regulation of the proportion of winged offspring produced in response to crowding in this polyphenism. Our results also show that an environmentally regulated maternal hormone can mediate phenotype production in the next generation, as well as provide significant insight into the molecular mechanisms underlying the functioning of transgenerational phenotypic plasticity.

show abstract

Juvenile hormone titres and winged offspring production do not correlate in the pea aphid, Acyrthosiphon pisum

Cited by 25 publications

References 28 publications

Molecular cloning and characterization of a prenyltransferase from the cotton aphid, Aphis gossypii

Molecular cloning and characterization of a prenyltransferase from the cotton aphid, Aphis gossypii

Alarm pheromone habituation in Myzus persicae has fitness consequences and causes extensive gene expression changes

Ecdysone signaling underlies the pea aphid transgenerational wing polyphenism

Contact Info

Product

Resources

About