Holocentric plants are more competitive under higher UV‐B doses

Zedek, František; Veselý, Pavel; Tichý, Lubomír; Elliott, Tammy L.; Garbolino, Emmanuel; Ruffray, Patrice de; Bureš, Petr

doi:10.1111/nph.17750

Cited by 6 publications

(6 citation statements)

References 59 publications

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“…Alternatively, small genomes in the tropics could be a result of the deleterious DNA-damaging effects of UV-B radiation (Bennett, 1976), which is generally highest in the tropics (Beckmann et al, 2014) and might select for smaller chromosomes that absorb less energy, therefore decreasing radiosensitivity (Sparrow et al, 1967). Recent findings show that plants with holocentric chromosomes, which tolerate fragmentation (Zedek & Bureš, 2019), are less stressed (Zedek et al, 2020;Zedek et al, 2021) and more competitive (Zedek et al, 2022) under higher UV-B doses support this idea. Moreover, homologous recombination used to repair UV-B-induced damage might increase deletion rates, thereby further promoting genome downsizing (Schubert & Vu, 2016).…”

Section: Small Genomes In the Tropicsmentioning

confidence: 94%

“…Distribution range sizes were calculated as the extent of occurrence (EOO) for each species based on the Global Biodiversity Information Facility (GBIF) distribution data. To obtain EOO estimates in square kilometers, we first cleaned the data for species occurrences from GBIF following Elliott et al (2022). Then, we calculated EOO (Dataset S1) using the 'eoo' function in the R package RANGEMAP v.0.1.18 (Cobos et al, 2022), with the 'polygons' option set to 'simple_wmap("simplest")' to omit oceans from the calculations.…”

Section: Distributional Range Size Estimationmentioning

confidence: 99%

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The global distribution of angiosperm genome size is shaped by climate

Bureš

Elliott

Veselý

et al. 2022

Preprint

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(1) Evolution of genome size is shaped by various intrinsic and extrinsic factors. We explored three long-standing hypotheses concerning factors shaping the global distribution of genome size: the mutational hazard hypothesis, the polyploidy-mediated hypothesis and the climate-mediated hypothesis. (2) We compiled the largest genome size dataset to date, encompassing >5% of known angiosperm species and analyzed genome size distribution using a comprehensive geographic distribution dataset for all angiosperms across all continents. (3) Angiosperm species with large range sizes only have small genomes, consistent with the mutational hazard hypothesis. We also uncovered a unique latitudinal pattern in the distribution of genome size diversity. Climate had a strong effect on the latitudinal pattern in genome size, while the effect of polyploidy was small. Contrary to the unimodal latitudinal patterns found for plant size traits and polyploidy, the increase in angiosperm genome sizes from the equator to 40-50 degrees N/S is probably mediated by different (mostly climatic) mechanisms from those underpinning the decrease in genome sizes observed from 40-50 degrees northwards. (4) Overall, our global analyses highlight that species range size and climate factors are the main drivers shaping the global distribution of angiosperm genome sizes, with their relative importance varying across the latitudinal gradient.

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Section: Small Genomes In the Tropicsmentioning

confidence: 94%

Section: Distributional Range Size Estimationmentioning

confidence: 99%

The global distribution of angiosperm genome size is shaped by climate

Bureš

Elliott

Veselý

et al. 2022

Preprint

Self Cite

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“…Several decades ago, Berkner & Marshall [95] suggested that UV radiation could have prevented the colonization of dry land, but more recent literature suggests this was unlikely [55,62,102,111,114,115]. However, UV radiation may have still played a role in the subsequent evolution of life on land once it was colonized [59,60,[116][117][118], just as stratospheric O 3 depletion in the last few decades, which has resulted in increased surface UV flux, has affected animals and plants in the Southern Hemisphere [119,120].…”

Section: Habitability and Increased Uv Radiationmentioning

confidence: 99%

A revised lower estimate of ozone columns during Earth’s oxygenated history

et al. 2022

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The history of molecular oxygen (O 2 ) in Earth’s atmosphere is still debated; however, geological evidence supports at least two major episodes where O 2 increased by an order of magnitude or more: the Great Oxidation Event (GOE) and the Neoproterozoic Oxidation Event. O 2 concentrations have likely fluctuated (between 10 −3 and 1.5 times the present atmospheric level) since the GOE ∼2.4 Gyr ago, resulting in a time-varying ozone (O 3 ) layer. Using a three-dimensional chemistry-climate model, we simulate changes in O 3 in Earth’s atmosphere since the GOE and consider the implications for surface habitability, and glaciation during the Mesoproterozoic. We find lower O 3 columns (reduced by up to 4.68 times for a given O 2 level) compared to previous work; hence, higher fluxes of biologically harmful UV radiation would have reached the surface. Reduced O 3 leads to enhanced tropospheric production of the hydroxyl radical (OH) which then substantially reduces the lifetime of methane (CH 4 ). We show that a CH 4 supported greenhouse effect during the Mesoproterozoic is highly unlikely. The reduced O 3 columns we simulate have important implications for astrobiological and terrestrial habitability, demonstrating the relevance of three-dimensional chemistry-climate simulations when assessing paleoclimates and the habitability of faraway worlds.

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“…In the case of polynomial regressions, we fitted orthogonal polynomials using the 'poly' function in base R, but the parameter 'raw' was set to 'TRUE' to obtain parameter estimates corresponding to response variables. (Zedek & Bureš, 2019), are less stressed (Zedek et al, 2020(Zedek et al, , 2021 and more competitive (Zedek et al, 2022) under higher UV-B doses. Moreover, homologous recombination used to repair UV-Binduced damage might increase rates of DNA deletion, thereby further promoting genome downsizing (Schubert & Vu, 2016).…”

Section: Small Genomes In the Tropicsmentioning

confidence: 97%

The global distribution of angiosperm genome size is shaped by climate

Bureš,

Elliott,

Veselý

et al. 2024

New Phytologist

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Summary Angiosperms, which inhabit diverse environments across all continents, exhibit significant variation in genome sizes, making them an excellent model system for examining hypotheses about the global distribution of genome size. These include the previously proposed large genome constraint, mutational hazard, polyploidy‐mediated, and climate‐mediated hypotheses. We compiled the largest genome size dataset to date, encompassing 16 017 (> 5% of known) angiosperm species, and analyzed genome size distribution using a comprehensive geographic distribution dataset for all angiosperms. We observed that angiosperms with large range sizes generally had small genomes, supporting the large genome constraint hypothesis. Climate was shown to exert a strong influence on genome size distribution along the global latitudinal gradient, while the frequency of polyploidy and the type of growth form had negligible effects. In contrast to the unimodal patterns along the global latitudinal gradient shown by plant size traits and polyploid proportions, the increase in angiosperm genome size from the equator to 40–50°N/S is probably mediated by different (mostly climatic) mechanisms than the decrease in genome sizes observed from 40 to 50°N northward. Our analysis suggests that the global distribution of genome sizes in angiosperms is mainly shaped by climatically mediated purifying selection, genetic drift, relaxed selection, and environmental filtering.

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Holocentric plants are more competitive under higher UV‐B doses

Cited by 6 publications

References 59 publications

The global distribution of angiosperm genome size is shaped by climate

The global distribution of angiosperm genome size is shaped by climate

A revised lower estimate of ozone columns during Earth’s oxygenated history

The global distribution of angiosperm genome size is shaped by climate

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