Reproduction and growth in Collembola under laboratory conditions

Janssen, G.M.; Joosse, Els N. G.

doi:10.1016/s0031-4056(23)00350-5

Cited by 24 publications

(2 citation statements)

References 7 publications

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“…However, this relationship may still imply an ecological advantage for the fungus, deriving from the use of insects as carriers for its propagation [213]. Springtails (Collembola) are especially known for feeding on soil fungi, including Cladosporium [214,215], and C. cladosporioides has been used as feed to preserve laboratory stocks of the species Hypogastrura tullbergi (Poduromorpha, Hypogastruridae) and Proisotoma minuta (Entomobryomorpha, Isotomidae) [216]. This species was also found to support the development of the minute brown scavenger beetle (Dienerella argus: Coleoptera, Latridiidae) [217]; moreover, it is part of the diet of the sap beetle Brachypeplus glaber (Coleoptera, Nitidulidae), as demonstrated by gut content analyses and observations of adult and larval feeding [19].…”

Section: Other Ecological Relationshipsmentioning

confidence: 99%

Cladosporium—Insect Relationships

Nicoletti,

Russo,

Becchimanzi

2024

JoF

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The range of interactions between Cladosporium, a ubiquitous fungal genus, and insects, a class including about 60% of the animal species, is extremely diverse. The broad case history of antagonism and mutualism connecting Cladosporium and insects is reviewed in this paper based on the examination of the available literature. Certain strains establish direct interactions with pests or beneficial insects or indirectly influence them through their endophytic development in plants. Entomopathogenicity is often connected to the production of toxic secondary metabolites, although there is a case where these compounds have been reported to favor pollinator attraction, suggesting an important role in angiosperm reproduction. Other relationships include mycophagy, which, on the other hand, may reflect an ecological advantage for these extremely adaptable fungi using insects as carriers for spreading in the environment. Several Cladosporium species colonize insect structures, such as galleries of ambrosia beetles, leaf rolls of attelabid weevils and galls formed by cecidomyid midges, playing a still uncertain symbiotic role. Finally, the occurrence of Cladosporium in the gut of several insect species has intriguing implications for pest management, also considering that some strains have proven to be able to degrade insecticides. These interactions especially deserve further investigation to understand the impact of these fungi on pest control measures and strategies to preserve beneficial insects.

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Section: Other Ecological Relationshipsmentioning

confidence: 99%

Cladosporium—Insect Relationships

Nicoletti,

Russo,

Becchimanzi

2024

JoF

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“…It has been estimated that many collembolan species have a life span that lasts several weeks to several months (Rusek, 1998). It has also been reported that it is rare for a female to produce more than two or three clutches of eggs in their life span (Janssen & Joosse, 1987). Given that in each population study the decline of initial A. caecus occurred at approximately day 30 and the 14 to 17-day age of individuals used in the 70-day test, it is likely that this species has a life span of 30 to 50 days in laboratory culture conditions, during which one or two clutches of eggs are produced.…”

Section: Life Cycle and Culture Conditionsmentioning

confidence: 99%

Characterization of Springtail (Arrhopalites caecus) for Use in Soil Ecotoxicity Testing

Martin,

Sibley,

Prosser

2024

Enviro Toxic and Chemistry

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Springtails (subclass: Collembola) represent one of the most extensively studied invertebrate groups in soil ecotoxicology. This is because of their ease of laboratory culture, significant ecological role, and sensitivity to environmental contaminants. Folsomia candida (family: Isotomidae) is a globally widespread parthenogenetic species that is prevalent in laboratory toxicity testing with springtails. Conversely, Arrhopalites caecus (family: Arrhopalitidae), a parthenogenic globular springtail species, remains untested in soil ecotoxicology. This species is found in diverse habitats, including cave systems and forest leaf litter, and has a global distribution. The sensitivity of A. caecus to environmental contaminants, such as neonicotinoid insecticides, as well as its life history and optimal culturing conditions, are largely unknown. The present study describes the establishment of a pure A. caecus laboratory culture and characterization of its life cycle and culturing conditions. We assessed the sensitivity of A. caecus to various insecticides, including exposures to the neonicotinoid thiamethoxam in soil and through a novel feeding assay as well as to clothianidin and cyantraniliprole in spiked soil exposures. In 7‐ and 14‐day exposures to thiamethoxam in agricultural soil, the 50% lethal concentration (LC50) values were determined to be 0.129 mg/kg dry weight and 0.010 mg/kg dry weight, respectively. The 14‐day LC50 for exposure to thiamethoxam via spiked food was determined to be 0.307 mg/kg dry weight. In addition, the 28‐day 50% effect concentration for inhibition of juvenile production from cyantraniliprole exposure in the same soil type was 0.055 mg/kg dry weight. Challenges encountered in using this species included susceptibility to mite infestation and low adult survival rates in the 28‐day cyantraniliprole test. Environ Toxicol Chem 2024;00:1–16. © 2024 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.

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Temperature‐induced gene expression associated with different thermal reaction norms for growth rate

et al. 2007

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Although nearly all organisms are subject to fluctuating temperature regimes in their natural habitat, little is known about the genetics underlying the response to thermal conditions, and even less about the genetic differences that cause individual variation in thermal response. Here, we aim to elucidate possible pathways involved in temperature-induced phenotypic plasticity of growth rate. Our model organism is the collembolan Orchesella cincta that occurs in a wide variety of habitats and is known to be adapted to local thermal conditions. Because sequence information is lacking in O. cincta, we constructed cDNA libraries enriched for temperature-responsive genes using suppression subtractive hybridization. We compared gene expression of O. cincta with steep thermal reaction norms (high plasticity) to those with flat thermal reaction norms (low plasticity) for juvenile growth after exposure to a temperature switch composed of a cooling or a warming treatment. Using suppression subtractive hybridization, we found differential expression of ten nuclear genes, including several genes involved in energy metabolism, such as pantothenate kinase and carbonic anhydrase. In addition, seven mitochondrial genes were found in the cloned subtracted library, but further analysis showed this was caused by allelic variation in mitochondrial genes in our founder population, and that a specific haplotype was associated with high thermal responsiveness. Future work will focus on candidate genes from pathways such as the oxidative phosphorylation and biosynthesis of coenzyme A which are possibly involved in thermal responsiveness of juvenile growth rate.

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Reproduction and growth in Collembola under laboratory conditions

Cited by 24 publications

References 7 publications

Cladosporium—Insect Relationships

Cladosporium—Insect Relationships

Characterization of Springtail (Arrhopalites caecus) for Use in Soil Ecotoxicity Testing

Temperature‐induced gene expression associated with different thermal reaction norms for growth rate

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