Increase in egg resistance to desiccation in springtails correlates with blastodermal cuticle formation: Eco‐evolutionary implications for insect terrestrialization

Vargas, Helena; Panfilio, Kristen A.; Roelofs, Dick; Rezende, Gustavo Lazzaro

doi:10.1002/jez.b.22979

Cited by 10 publications

(8 citation statements)

References 64 publications

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“…As an important composition of the eggshell layer, the blastodermal cuticle is generally described as a resistant barrier, which may alleviate the damage caused by SPc. 42 Based on current data, the SPc was totally safe to ladybird eggs at the working concentration (≤2.5 μg/mL) for field application, which would not show any negative effects on egg hatching.…”

Section: ■ Results and Discussionmentioning

confidence: 79%

“…As a successful biological agent, ladybird eggs are usually released to control aphids and other insect pests in greenhouses. , As shown in Figure S1, the SPc exhibited nearly no toxicity toward eggs, and the lowest hatching rate of 73.85% was observed at the highest concentration of SPc for 1-day-old eggs. As an important composition of the eggshell layer, the blastodermal cuticle is generally described as a resistant barrier, which may alleviate the damage caused by SPc . Based on current data, the SPc was totally safe to ladybird eggs at the working concentration (≤2.5 μg/mL) for field application, which would not show any negative effects on egg hatching.…”

Section: Resultsmentioning

confidence: 80%

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Biotoxicity Evaluation of a Cationic Star Polymer on a Predatory Ladybird and Cooperative Pest Control by Polymer-Delivered Pesticides and Ladybird

Dong

Chen

Lin

et al. 2022

ACS Appl. Mater. Interfaces

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Although employing nanocarriers for gene/drug delivery shows great potential in agricultural fields, the biotoxicity of nanocarriers is a major concern for largescale applications. Herein, we synthesized a cationic star polymer (SPc) as a pesticide nanocarrier/adjuvant to evaluate its safety against a widely used predatory ladybird (Harmonia axyridis). The application of SPc at extremely high concentrations nearly did not influence the hatching of ladybird eggs but it led to the death of ladybird larvae at lethal concentration 50 (LC 50 ) values of 43.96 and 19.85 mg/mL through the soaking and feeding methods, respectively. The oral feeding of SPc downregulated many membrane protein genes and lysosome genes significantly, and the cell membrane and nucleus in gut tissues were remarkably damaged by SPc application, revealing that the lethal mechanism might be SPc-mediated membrane damage. Furthermore, the oral feeding of SPc increased the relative abundance of Serratia bacteria in ladybird guts to result in bacterial infection. Coapplication of ladybird and SPc-loaded thiamethoxam/matrine achieved desired control efficacies of more than 80% against green peach aphids, revealing that the coapplication could overcome the slow-acting property of ladybirds. To our knowledge, this is the first attempt to investigate the polymer-mediated lethal mechanism toward natural enemies and explore the possibility of coapplying SPc-loaded pesticides and natural enemies for pest management.

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Section: ■ Results and Discussionmentioning

confidence: 79%

Section: Resultsmentioning

confidence: 80%

Biotoxicity Evaluation of a Cationic Star Polymer on a Predatory Ladybird and Cooperative Pest Control by Polymer-Delivered Pesticides and Ladybird

Dong

Chen

Lin

et al. 2022

ACS Appl. Mater. Interfaces

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Section: (C) Evolution Of Extra-embryonic Tissue Modifications In Ony...mentioning

confidence: 99%

“…In arthropods and amniotes, it has been suggested that the presence of specialized extra-embryonic tissues is correlated with terrestrialization and egg deposition in corresponding habitats [3,13,74,75]. Extra-embryonic tissues surrounding the developing embryo might serve as a protective barrier against mechanical stress and desiccation and, thus, allowed arthropods and amniotes to conquer new habitats [3,13,74,75]. On the other hand, while onychophorans are exclusively terrestrial, they are all confined to humid microhabitats irrespective of their developmental mode or specific distribution (figure 2A,B; [9,38,39]).…”

Section: (C) Evolution Of Extra-embryonic Tissue Modifications In Ony...mentioning

confidence: 99%

Review of extra-embryonic tissues in the closest arthropod relatives, onychophorans and tardigrades

Treffkorn

Mayer

Janßen

2022

Phil. Trans. R. Soc. B

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The so-called extra-embryonic tissues are important for embryonic development in many animals, although they are not considered to be part of the germ band or the embryo proper. They can serve a variety of functions, such as nutrient uptake and waste removal, protection of the embryo against mechanical stress, immune response and morphogenesis. In insects, a subgroup of arthropods, extra-embryonic tissues have been studied extensively and there is increasing evidence that they might contribute more to embryonic development than previously thought. In this review, we provide an assessment of the occurrence and possible functions of extra-embryonic tissues in the closest arthropod relatives, onychophorans (velvet worms) and tardigrades (water bears). While there is no evidence for their existence in tardigrades, these tissues show a remarkable diversity across the onychophoran subgroups. A comparison of extra-embryonic tissues of onychophorans to those of arthropods suggests shared functions in embryonic nutrition and morphogenesis. Apparent contribution to the final form of the embryo in onychophorans and at least some arthropods supports the hypothesis that extra-embryonic tissues are involved in organogenesis. In order to account for this role, the commonly used definition of these tissues as ‘extra-embryonic’ should be reconsidered. This article is part of the theme issue ‘Extraembryonic tissues: exploring concepts, definitions and functions across the animal kingdom’.

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“…In many arthropods, a cuticular egg envelope (blastodermal cuticle in crustaceans; serosal cuticle in insects) is synthesized during early embryogenesis ( Lu et al, 2022 ). During the course of embryogenesis, the blastodermal cuticle is gradually substitutes maternal multilayered eggshell to protect the embryos of arthropods against harsh environmental factors ( Vargas et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Morphological and molecular evolution of hadal amphipod’s eggs provides insights into embryogenesis under high hydrostatic pressure

Wang²,

Jiang³

et al. 2022

Front. Cell Dev. Biol.

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Hadal zones are unique habitats characterized by high hydrostatic pressure (HHP) and scarce food supplies. The ability of eggs of species dwelling in hadal zones to develop into normal embryo under high hydrostatic pressure is an important evolutionary and developmental trait. However, the mechanisms underlying the development of eggs of hadal-dwelling species remain unknown due to the difficulty of sampling ovigerous females. Here, morphological and transcriptome analyses of eggs of the “supergiant” amphipod Alicella gigantea collected from the New Britain Trench were conducted. The morphology of A. gigantea eggs, including size, was assessed and the ultrastructure of the eggshell was investigated by scanning electron microscopy. Transcriptome sequencing and molecular adaptive evolution analysis of A. gigantea eggs showed that, as compared with shallow-water Gammarus species, genes exhibiting accelerated evolution and the positively selected genes were mostly related to pathways associated with “mitosis” and “chitin-based embryonic cuticle biosynthetic process”, suggesting that “normal mitosis maintenance” and “cuticle development and protection” are the two main adaptation strategies for survival of eggs in hadal environments. In addition, the concentration of trimethylamine oxide (TMAO), an important osmotic regulator, was significantly higher in the eggs of hadal amphipods as compared to those of shallow-water species, which might promote the eggs’ adaptation abilities. Morphological identification, evolutionary analysis, and the trimethylamine oxide concentration of A. gigantea eggs will facilitate a comprehensive overview of the piezophilic adaptation of embryos in hadal environments and provide a strategy to analyze embryogenesis under high hydrostatic pressure.

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Increase in egg resistance to desiccation in springtails correlates with blastodermal cuticle formation: Eco‐evolutionary implications for insect terrestrialization

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 10 publications

References 64 publications

Biotoxicity Evaluation of a Cationic Star Polymer on a Predatory Ladybird and Cooperative Pest Control by Polymer-Delivered Pesticides and Ladybird

Biotoxicity Evaluation of a Cationic Star Polymer on a Predatory Ladybird and Cooperative Pest Control by Polymer-Delivered Pesticides and Ladybird

Review of extra-embryonic tissues in the closest arthropod relatives, onychophorans and tardigrades

Morphological and molecular evolution of hadal amphipod’s eggs provides insights into embryogenesis under high hydrostatic pressure

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