ArticleAnnals of botany2020
Substantial intraspecific genome size variation in golden-brown algae and its phenotypic consequences.
Article in Annals of botany, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Linking variation in genome size to cyst size in chrysophytes.Journal of phycology · 2026Article
- Snow alga Sanguina aurantia as revealed through de novo genome assembly and annotation.G3 (Bethesda, Md.) · 2024Article
- Genome size variation and evolution during invasive range expansion in an introduced plant.Evolutionary applications · 2024Article
- Nuclear DNA Content Estimation of Seaweed by Fluorimetry Analysis.Methods in molecular biology (Clifton, N.J.) · 2023Article
- Nuclear DNA Content Variation in Different Life Cycle Stages of Sugar Kelp, Saccharina latissima.Marine biotechnology (New York, N.Y.) · 2022Article
- Sampling a gradient of red snow algae bloom density reveals novel connections between microbial communities and environmental features.Scientific reports · 2022Article
- Large Genomes Are Associated With Greater Cell Size and Ecological Shift Towards More Nitrogen-Rich and Higher-Latitude Environments in Microalgae of the Genus Synura.The Journal of eukaryotic microbiologyArticle
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Abstract
BACKGROUND AND
aimsWhile nuclear DNA content variation and its phenotypic consequences have been well described for animals, vascular plants and macroalgae, much less about this topic is known regarding unicellular algae and protists in general. The dearth of data is especially pronounced when it comes to intraspecific genome size variation. This study attempts to investigate the extent of intraspecific variability in genome size and its adaptive consequences in a microalgal species.
methodsPropidium iodide flow cytometry was used to estimate the absolute genome size of 131 strains (isolates) of the golden-brown alga Synura petersenii (Chrysophyceae, Stramenopiles), identified by identical internal transcribed spacer (ITS) rDNA barcodes. Cell size, growth rate and genomic GC content were further assessed on a sub-set of strains. Geographic location of 67 sampling sites across the Northern hemisphere was used to extract climatic database data and to evaluate the ecogeographical distribution of genome size diversity. KEY
resultsGenome size ranged continuously from 0.97 to 2.02 pg of DNA across the investigated strains. The genome size was positively associated with cell size and negatively associated with growth rate. Bioclim variables were not correlated with genome size variation. No clear trends in the geographical distribution of strains of a particular genome size were detected, and strains of different genome size occasionally coexisted at the same locality. Genomic GC content was significantly associated only with genome size via a quadratic relationship.
conclusionsGenome size variability in S. petersenii was probably triggered by an evolutionary mechanism operating via gradual changes in genome size accompanied by changes in genomic GC content, such as, for example, proliferation of transposable elements. The variation was reflected in cell size and relative growth rate, possibly with adaptive consequences.
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