Variation in Genome Size in Benthic Polychaetes: Systematic and Ecological Relationships

Gambi, María Cristina; Ramella, L.; Sella, Gabriella; Protto, P.; Aldieri, Elisabetta

doi:10.1017/s0025315400038613

Cited by 34 publications

(25 citation statements)

References 29 publications

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“…A high developmental rate should be needed to achieve this. Note that small polychaete annelids developing rapidly in similar interstitial environments show smaller genome sizes than macrobenthic species (Gambi et al, 1997). For Antarctic midges, such as B. antarctica or Eretmoptera murphyi Worland, 2010), larval development lasts two years, mostly arrested in a frozen state, but metamorphosis and reproduction must occur during the very short summer period.…”

Section: Discussionmentioning

confidence: 99%

Chironomid Midges (Diptera, Chironomidae) Show Extremely Small Genome Sizes

et al. 2015

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Section: Discussionmentioning

confidence: 99%

Chironomid Midges (Diptera, Chironomidae) Show Extremely Small Genome Sizes

et al. 2015

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“…For a given body temperature, genome size generally correlates negatively with growth rate across both plants and animals (Bennett, 1987;Gregory, 2005), and in animals also with mass-specific metabolic rate (Kozlowski, Konarzewski & Gawelczyk, 2003;Gregory, 2005). Developmental rate has also been found to be negatively associated with genome size in several invertebrates; such as polychaetes (Gambi et al, 1997) copepods (White & McLaren, 2000;Wyngaard et al, 2005) and Drosophilidae (Gregory & Johnston, 2008). This also holds true for some ectothermic vertebrates, for example Maciak et al (2011) reported an inverse relationship between standard metabolic rate and erythrocyte and genome size in fish.…”

Section: Cell Size Genome Size Growth and Metabolismmentioning

confidence: 90%

Temperature‐size relations from the cellular‐genomic perspective

Daufresne²,

2012

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A family of empirically based ecological 'rules', collectively known as temperature-size rules, predicts larger body size in colder environments. This prediction is based on studies demonstrating that a wide range of ectotherms show increased body size, cell size or genome size in low-temperature habitats, or that individuals raised at low temperature become larger than conspecifics raised at higher temperature. There is thus a potential for reduction in size with global warming, affecting all levels from cell volume to body size, community composition and food webs. Increased body size may be obtained either by increasing the size or number of cells. Processes leading to changed cell size are of great interest from an ecological, physiological and evolutionary perspective. Cell size scales with fundamental properties such as genome size, growth rate, protein synthesis rates and metabolic activity, although the causal directions of these correlations are not clear. Changes in genome size will thus, in many cases, not only affect cell or body size, but also life-cycle strategies. Symmetrically, evolutionary drivers of life-history strategies may impact growth rate and thus cell size, genome size and metabolic rates. Although this goes to the core of many ecological processes, it is hard to move from correlations to causations. To the extent that temperature-driven changes in genome size result in significant differences among populations in body size, allometry or life-cycle events such as mating season, it could serve as a fast route to speciation. We offer here a novel perspective on the temperature-size rules from a 'bottom-up' perspective: how temperature may induce changes in genome size, and thus implicitly in cell size and body size of metazoans. Alternatively: how temperature-driven enlargement of cells also dictates genome-size expansion to maintain the genome-size to cell-volume ratio. We then discuss the different evolutionary drivers in aquatic versus terrestrial systems, and whether it is possible to arrive at a unifying theory that also may serve as a predictive tool related to temperature changes. This, we believe, will offer an updated review of a basic concept in ecology, and novel perspectives on the basic biological responses to temperature changes from a genomic perspective.

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“…According to detailed references in Animal Genome Size Database (Gregory 2008), there is a great heterogeneity in GS (0.11-7.2 pg) among the species of the order Phyllodocida. The genome size of sea mouse is more similar to the species in the families Silidae and Hesonidae (< 1.0 pg per haploid) than to Glyceridae or Nephtidae, where for some species haploid genome size is 7.2 pg (Conner et al 1972;Gambi et al 1997). The diploid DNA content (2C) of spiny crab M. crispata was 7.76 pg.…”

Section: Dna Contentmentioning

confidence: 96%

Hemocytes/coelomocytes DNA content in five marine invertebrates: cell cycles and genome sizes

et al. 2008

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Abstract:The hemocytes/coelomocytes DNA content in five selected marine invertebrates (sea mouse Aphrodita aculeata, spiny crab Maja crispata, sea star Echinaster sepositus, sea urchin Paracentrotus lividus, and tunicate Phallusia mammillata) was investigated by flow cytometry. The cell cycle analyses identified sea mouse coelomocytes as proliferating cells and revealed that spiny crab hemocytes and sea urchin coelomocytes complete their division in the hemolymph and coelom, respectively. The genome sizes of sea mouse and spiny crab are reported for the first time. The diploid DNA content (2C) in sea mouse A. aculeate was 1.24 pg, spiny crab M. crispata 7.76 pg, red starfish E. sepositus 1.52 pg and sea urchin P. lividus 1.08 pg. The mean diploid DNA content in tunicate P. mammillata was 0.11 pg with a high interindividual variability (45%). The presented results provide a useful database for future studies in the field of invertebrate physiology, ecotoxicology, biodiversity, species conservation and phylogeny.

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Variation in Genome Size in Benthic Polychaetes: Systematic and Ecological Relationships

Cited by 34 publications

References 29 publications

Chironomid Midges (Diptera, Chironomidae) Show Extremely Small Genome Sizes

Chironomid Midges (Diptera, Chironomidae) Show Extremely Small Genome Sizes

Temperature‐size relations from the cellular‐genomic perspective

Hemocytes/coelomocytes DNA content in five marine invertebrates: cell cycles and genome sizes

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