Annual killifish adaptations to ephemeral environments: Diapause i in two <i>austrolebias</i> species

Arezo, María José; Papa, Nicolás; Berois, Nora; Clivio, Graciela; Montagne, Jimena; Piedra, Soledad De la

doi:10.1002/dvdy.24580

Cited by 11 publications

(8 citation statements)

References 55 publications

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“…DI occurs early in development, before the embryonic axis is established. DI-promoting environmental cues include anaerobic conditions, low ambient temperatures, and the presence of adult fishes (Wourms, 1972;Levels et al, 1986;Arezo et al, 2017). DII occurs midway through development before the onset of organogenesis.…”

Section: Diapause In Annual Killifishes: Austrofundulus Limnaeus and Nothobranchius Furzerimentioning

confidence: 99%

Hormonal Regulation of Diapause and Development in Nematodes, Insects, and Fishes

Karp

2021

Front. Ecol. Evol.

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Diapause is a state of developmental arrest adopted in response to or in anticipation of environmental conditions that are unfavorable for growth. In many cases, diapause is facultative, such that animals may undergo either a diapause or a non-diapause developmental trajectory, depending on environmental cues. Diapause is characterized by enhanced stress resistance, reduced metabolism, and increased longevity. The ability to postpone reproduction until suitable conditions are found is important to the survival of many animals, and both vertebrate and invertebrate species can undergo diapause. The decision to enter diapause occurs at the level of the whole animal, and thus hormonal signaling pathways are common regulators of the diapause decision. Unlike other types of developmental arrest, diapause is programmed, such that the diapause developmental trajectory includes a pre-diapause preparatory phase, diapause itself, recovery from diapause, and post-diapause development. Therefore, developmental pathways are profoundly affected by diapause. Here, I review two conserved hormonal pathways, insulin/IGF signaling (IIS) and nuclear hormone receptor signaling (NHR), and their role in regulating diapause across three animal phyla. Specifically, the species reviewed are Austrofundulus limnaeus and Nothobranchius furzeri annual killifishes, Caenorhabditis elegans nematodes, and insect species including Drosophila melanogaster, Culex pipiens, and Bombyx mori. In addition, the developmental changes that occur as a result of diapause are discussed, with a focus on how IIS and NHR pathways interact with core developmental pathways in C. elegans larvae that undergo diapause.

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Section: Diapause In Annual Killifishes: Austrofundulus Limnaeus and Nothobranchius Furzerimentioning

confidence: 99%

Hormonal Regulation of Diapause and Development in Nematodes, Insects, and Fishes

Karp

2021

Front. Ecol. Evol.

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“…On different aspects of molecular developmental biology in invertebrates, we highlight the already mentioned continuing research on parasitic worms such as cestodes (Chalar et al, 2016;Montagne et al, 2019;Preza et al, 2018), and in Drosophila (Bolatto et al, 2015). The annual fishes are a particular case, where several groups at Facultad de Ciencias are contributing to understand the particular developmental stages, the molecular regulation of the diapauses and the functional genomics of the early stages and sexual determination of members of the genus Austrolebias (Arezo et al, 2014;Arezo et al, 2017). In association with the Center for Genome Regulation (University of Chile), they are currently finishing the sequencing and assembly of the genome and basic transcriptome of one of these species, A. charrua.…”

Section: The Diaspora and The Return To Democracy: After Pupation A mentioning

confidence: 99%

Building the embryo of Developmental Biology in Uruguay

Zolessi

Berois²,

Brauer³

et al. 2021

Int. J. Dev. Biol.

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In Uruguay, a country with a small population, and hence a small scientific community, there were no classical embryologists as such in the past. From the decade of 1950, however, a cumulus of favorable conditions gave rise to highly active and modern research groups in the fields of cytology and physiology, that eventually contributed to developmental biology. The advent of a long dictatorship between de 1970’s and 1980’s caused two things: a strong lag in local research and the migration of young investigators who learned abroad new disciplines and technologies. The coming back to democracy allowed for the return of some, now as solid researchers, and together with those who stayed, built a previously inexistent postgraduate training program and a globally-integrated academy that fostered diversity of research disciplines, including developmental biology. In the present work we highlight the key contribution of pioneer researchers and the significant role played by academic and funding national institutions in the growth and consolidation of developmental biology in our country.

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“…Diapause I occurs during blastomere development, DII during somitogenesis, and DIII prior to hatching after organogenesis is completed (Wourms 1972a;Wourms 1972b;Wourms 1972c). Diapause I illustrates a completely novel pattern of cell migration where blastomeres become ameboid and move around before their coalescence and the resumption of development (Carter and Wourms 1990;Arezo et al 2017;Dolfi et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, much of what is known about diapause in killifishes is restricted to detailed studies of a few, phylogenetically dispersed killifish model species such as Austrofundulus limnaeus, Austrolebias sp., Nematolebias whitei, and Nothobranchius sp. (Thompson and Ortí 2016;Arezo et al 2017;Romney et al 2018;Riggs et al 2019;Hu et al 2020;Zajic et al 2020;Chalar et al 2021;Polačik et al 2021). Thus, little is known about most killifish species exhibiting the annual life cycle and a broad comparative study with an in-depth genome-wide exploration remains missing.…”

Section: Introductionmentioning

confidence: 99%

Deterministic shifts in molecular evolution correlate with convergence to annualism in killifishes

Thompson

Black

Huang

et al. 2021

Preprint

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The repeated evolution of novel life histories correlating with ecological variables offer opportunities to test scenarios of convergence and determinism in genetic, developmental, and metabolic features. Here we leverage the diversity of aplocheiloid killifishes, a clade of teleost fishes that contains over 750 species on three continents. Nearly half of these are annual or seasonal species that inhabit bodies of water that desiccate and are unfeasible for growth, reproduction, or survival for weeks to months at a time. We present a large-scale phylogenomic reconstruction of aplocheiloid killifish evolution using newly sequenced transcriptomes from all major clades. We show that developmental dormancy (diapause) and annualism have up to seven independent origins in Africa and America. We then measure evolutionary rates of orthologous genes and show that annual life history is correlated with higher dN/dS ratios. Many of these fast-evolving genes in annual species constitute key developmental genes and nuclear-encoded metabolic genes that control oxidative phosphorylation. Lastly, we compare these fast-evolving genes to genes associated with developmental dormancy and metabolic shifts in killifishes and other vertebrates and thereby identify molecular evolutionary signatures of repeated evolutionary transitions to extreme environments.

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Annual killifish adaptations to ephemeral environments: Diapause i in two austrolebias species

Abstract: These phenotypes are alternative diapause I stages and may have ecological relevance because both were found in embryos in natural ponds. Developmental Dynamics 246:848-857, 2017. © 2017 Wiley Periodicals, Inc.

Cited by 11 publications

References 55 publications

Hormonal Regulation of Diapause and Development in Nematodes, Insects, and Fishes

Hormonal Regulation of Diapause and Development in Nematodes, Insects, and Fishes

Building the embryo of Developmental Biology in Uruguay

Deterministic shifts in molecular evolution correlate with convergence to annualism in killifishes

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