Conidia survival of Aspergillus section Nigri, Flavi and Circumdati under <scp>UV</scp>‐A and <scp>UV</scp>‐B radiation with cycling temperature/light regime

García-Cela, Esther; Marı́n, Sonia; Reyes, Monica; Sanchis, V.; Ramos, Ana M. González

doi:10.1002/jsfa.7343

Cited by 10 publications

(9 citation statements)

References 44 publications

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“…Our survival data are in broad agreement with data generated by other studies (11; 74; 75; 76; 77). For example, Magan et al (68) also found RH as crucial to determining A. alternata germinability.…”

Section: Discussionsupporting

confidence: 92%

Differences in spore size and atmospheric survival shape stark contrasts in the dispersal dynamics of two closely related fungal pathogens

Golan

Oneto

Ding

et al. 2023

Preprint

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A frequently ignored but critical aspect of microbial dispersal is survival in the atmosphere. We exposed spores of two closely related, morphologically dissimilar, and economically important fungal pathogens to typical atmospheric environments and modeled their movement in the troposphere. We first measured the mortality of Alternaria solani and A. alternata conidia exposed to ranges of solar radiation, relative humidity, and temperature. We then measured survival in an advantageous environment over 12 days. A. solani conidia are nearly 10 times larger than A. alternata conidia and most die after 24 hours. By contrast, over half of A. alternata conidia remained viable at 12 days. The greater viability of the smaller spores is counterintuitive as larger spores are assumed to be more durable. To elucidate the consequences of survival rates for dispersal, we deployed models of atmospheric spore movement across North American. We predict 99% of the larger A. solani conidia settle within 24 hours, with a maximum dispersal distance of 100 km. By contrast, most A. alternata conidia remain airborne for more than 12 days and long-distance dispersal is possible, e.g., from Wisconsin to the Atlantic Ocean. We observe that the larger conidia of A. solani survive poorly but also land sooner and move over shorter distances as compared to the smaller conidia of A. alternata. Our data relating larger spore size to poorer survival in the atmosphere and shorter distances travelled likely translate to other fungal species and highlight the potential for starkly different dispersal dynamics among even closely related fungi.

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Section: Discussionsupporting

confidence: 92%

Differences in spore size and atmospheric survival shape stark contrasts in the dispersal dynamics of two closely related fungal pathogens

Golan

Oneto

Ding

et al. 2023

Preprint

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“…162,176,178 Other examples include the modulating effect of UV radiation on the growth of grape vines and subsequent alterations in the composition of the berry fruit and resulting juice or wine. These changes can be used by growers to experimentally manipulate conditions to alter the taste, quality of the berry, and appearance of the wine, and cross-tolerance to environmental stressors [179][180][181] including fungal infections, 182,183 and temperature. 179 In many geographical regions, a concern arising from increasing temperature is that certain crops, including grape vines, show more rapid ripening that affects quality (e.g.…”

Section: Sunglasses and Contact Lenses Provide Excellent Protection F...mentioning

confidence: 99%

Environmental effects of ozone depletion and its interactions with climate change: progress report, 2015

2016

Photochem Photobiol Sci

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The Environmental Effects Assessment Panel (EEAP) is one of three Panels that regularly informs the Parties (countries) to the Montreal Protocol on the effects of ozone depletion and the consequences of climate change interactions with respect to human health, animals, plants, biogeochemistry, air quality, and materials. The Panels provide a detailed assessment report every four years. The most recent 2014 Quadrennial Assessment by the EEAP was published as a special issue of seven papers in 2015 (Photochem. Photobiol. Sci., 2015, 14, 1-184). The next Quadrennial Assessment will be published in 2018/2019. In the interim, the EEAP generally produces an annual update or progress report of the relevant scientific findings. The present progress report for 2015 assesses some of the highlights and new insights with regard to the interactive nature of the effects of UV radiation, atmospheric processes, and climate change.

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“…Ochratoxin A (OTA) is a mycotoxin produced by Aspergillus and Penicillium species (Frisvad et al, 2004a,b) responsible for contaminating many foodstuffs including cereals (Scudamore et al, 2004), coffee (Taniwaki et al, 2003), cocoa (Bonvehí, 2004), grapes and derivatives (Abrunhosa et al, 2001;Varga and Kozakiewicz, 2006;Zimmerli and Dick, 1996). Many studies have shown that the Aspergillus section Nigri, commonly known as "Black Aspergilli", are responsible for OTA contamination of grapes (García-Cela et al, 2016;Palumbo et al, 2011;Battilani et al, 2003). In particular, A. carbonarius is considered the major species responsible, with other closely related biseriate species, A. niger and A. welwitschiae of less importance (Perrone et al, 2008;Cabañes and Bragulat, 2018).…”

Section: Introductionmentioning

confidence: 99%

Interacting climate change factors (CO2 and temperature cycles) effects on growth, secondary metabolite gene expression and phenotypic ochratoxin A production by Aspergillus carbonarius strains on a grape-based matrix

et al. 2021

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Little is known on the impact that climate change (CC) may have on Aspergillus carbonarius and Ochratoxin A (OTA) contamination of grapes, especially in the Mediterranean region-a hot spot for the impact of CC scenarios with temperature expected to increase by +2-5°C and CO2 to double or triple (400 vs 800/1200 ppm). This study examined the effect of (i) current and increased temperature in the alternating 11.5h dark/12.5h light cycle (15-28°C vs 18-34°C), representative of the North Apulia area, South Italy and (ii) existing and predicted CO2 concentrations (400 vs 1000 ppm), on growth, expression of biosynthetic genes (AcOTApks, AcOTAnrps, AcOTAhal, AcOTAp450, AcOTAbZIP) and regulatory genes of Velvet complex (laeA/veA/velB, "velvet complex") involved in OTA biosynthesis and OTA phenotypic production by three strains of A. carbonarius. The experiments made on a grape-based matrix showed that elevated CO2 resulted in a general stimulation of growth and OTA production. These results were supported by the up-regulation of both structural and regulatory genes involved in the OTA biosynthesis in elevated CO2 condition. Our work has

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Conidia survival of Aspergillus section Nigri, Flavi and Circumdati under UV‐A and UV‐B radiation with cycling temperature/light regime

Cited by 10 publications

References 44 publications

Differences in spore size and atmospheric survival shape stark contrasts in the dispersal dynamics of two closely related fungal pathogens

Differences in spore size and atmospheric survival shape stark contrasts in the dispersal dynamics of two closely related fungal pathogens

Environmental effects of ozone depletion and its interactions with climate change: progress report, 2015

Interacting climate change factors (CO2 and temperature cycles) effects on growth, secondary metabolite gene expression and phenotypic ochratoxin A production by Aspergillus carbonarius strains on a grape-based matrix

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