Cold tolerance and myo-inositol accumulation in overwintering adults of a lady beetle, Harmonia axyridis (Coleoptera: Coccinellidae)

Watanabe, Masahiko

doi:10.14411/eje.2002.002

Cited by 74 publications

(66 citation statements)

References 18 publications

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“…Myo-inositol has not been found to play a role in cold acclimation in other Drosophila species, but it has been shown to accumulate seasonally in few other insect species (Block and Sømme, 1983;Koštál et al, 1996). It has also been correlated with an increase in cold tolerance in some Coleoptera and Lepidoptera species (Watanabe and Tanaka, 1999;Watanabe, 2002;Liu et al, 2009) and we hypothesise that its accumulation in overwintering D. montana would act as a cryoprotectant. In the present study the ortholog of inos (Dvir\GJ20549) was upregulated in both D. montana and D. virilis.…”

Section: Functional Processesmentioning

confidence: 87%

How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group?

et al. 2015

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For many organisms the ability to cold acclimate with the onset of seasonal cold has major implications for their fitness. In insects, where this ability is widespread, the physiological changes associated with increased cold tolerance have been well studied. Despite this, little work has been done to trace changes in gene expression during cold acclimation that lead to an increase in cold tolerance. We used an RNA-Seq approach to investigate this in two species of the Drosophila virilis group. We found that the majority of genes that are differentially expressed during cold acclimation differ between the two species. Despite this, the biological processes associated with the differentially expressed genes were broadly similar in the two species. These included: metabolism, cell membrane composition, and circadian rhythms, which are largely consistent with previous work on cold acclimation/cold tolerance. In addition, we also found evidence of the involvement of the rhodopsin pathway in cold acclimation, a pathway that has been recently linked to thermotaxis. Interestingly, we found no evidence of differential expression of stress genes implying that long-term cold acclimation and short-term stress response may have a different physiological basis.

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Section: Functional Processesmentioning

confidence: 87%

How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group?

et al. 2015

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“…The beetles tolerate cold by accumulating large quantities of polyols, and thus reducing their supercooling point (Watanabe, 2002). However, this physiological trait does not allow H. axyridis individuals to remain in their feeding habitat and survive low winter temperatures.…”

Section: Aggregationmentioning

confidence: 99%

Behavioral and Immunological Features Promoting the Invasive Performance of the Harlequin Ladybird Harmonia axyridis

2017

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The harlequin ladybird Harmonia axyridis is now established as a model to test hypotheses explaining why some species become successfully invasive, while others, even closely related ones, do not. In this review, we evaluate behavioral and immunological features that may play a role in the invasive performance of this model species. We discuss the behavioral traits and associated semiochemicals that promote the invasive success of H. axyridis. In particular, we consider (1) the aggregative behavior and the particular role of long-chain hydrocarbons; (2) the importance of sex pheromones and non-volatile chemicals in mate location and selection; (3) the use of allelochemicals for prey location; and (4) the nature of chemicals that protect against natural enemies. We also highlight the superior immune system of H. axyridis, which encompasses a broader spectrum of antimicrobial peptides (and higher inducible expression levels) compared with native ladybird beetles such as Adalia bipunctata and Coccinella septempunctata. The chemical defense compound harmonine and the antimicrobial peptides are thought to confer resistance against the abundant microsporidia carried by H. axyridis. These parasites can infect and kill native ladybird species feeding on H. axyridis eggs or larvae, supporting the hypothesis that intraguild predation plays a role in the ability of H. axyridis to outcompete native ladybird species in newly-colonized areas.

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“…Would it be possible that H. axyridis requires large thermal fluctuations not present in these islands in order to have a satisfactory diapause? In Japan and south-eastern of France, H. axyridis interrupts its reproduction when temperature is low (below 12°C) and the daylight short (Ongagna et al 1993;Watanabe 2002). The optimum temperature for overwintering is between 0 and -5°C (Watanabe 2002).…”

Section: Azores the First Failure Of H Axyridis?mentioning

confidence: 99%

“…In Japan and south-eastern of France, H. axyridis interrupts its reproduction when temperature is low (below 12°C) and the daylight short (Ongagna et al 1993;Watanabe 2002). The optimum temperature for overwintering is between 0 and -5°C (Watanabe 2002). Winter annual temperature occurring in the Azores may not allow a sufficiently long period for diapause by individuals.…”

Section: Azores the First Failure Of H Axyridis?mentioning

confidence: 99%

Harmonia axyridis: What will stop the invader?

Soares

Borges

et al. 2007

BioControl

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In recent years Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) has become a very popular insect among biological control practitioners and scientists, not only for its potential to be an efficient biological control agent but also because it is considered invasive. Individuals of this species were deliberately introduced into several countries for biological control of different arthropods pests. However the predator itself became an invasive species, affecting the dynamics and composition of several guilds through direct or indirect interactions with established species, including intraguild predation. In this paper we discuss the reasons why the species has a high invasiveness and what are the limits to invasion by this species. It is not clear if the invasiveness of the beetle is linked to its biological, ecological and behavioural abilities, or to other factors such as invasibility and interactions between the invaders, the noninvaders, and the habitat, which may in part explain the reasons of its success and help us to answer the question ''what will stop the invader?'' We also discuss the reason for the absence of the predator in the Azores islands. Despite the intentional introduction of H. axyridis in the Azores and the high number of individuals released, there are no records of this species in the wild, despite recent extensive sampling effort. In this paper we discuss the reasons for the apparent failure or the delay in establishment of the predator. One factor which may hamper the establishment of H. axyridis in some of the Azores islands is the absence of winter

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Cold tolerance and myo-inositol accumulation in overwintering adults of a lady beetle, Harmonia axyridis (Coleoptera: Coccinellidae)

Cited by 74 publications

References 18 publications

How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group?

How consistent are the transcriptome changes associated with cold acclimation in two species of the Drosophila virilis group?

Behavioral and Immunological Features Promoting the Invasive Performance of the Harlequin Ladybird Harmonia axyridis

Harmonia axyridis: What will stop the invader?

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