Articles | Volume 16, issue 23
https://doi.org/10.5194/bg-16-4647-2019
https://doi.org/10.5194/bg-16-4647-2019
Research article
 | 
09 Dec 2019
Research article |  | 09 Dec 2019

Macromolecular fungal ice nuclei in Fusarium: effects of physical and chemical processing

Anna T. Kunert, Mira L. Pöhlker, Kai Tang, Carola S. Krevert, Carsten Wieder, Kai R. Speth, Linda E. Hanson, Cindy E. Morris, David G. Schmale III, Ulrich Pöschl, and Janine Fröhlich-Nowoisky

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Cited articles

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Aoki, T., O'Donnell, K., and Ichikawa, K.: Fusarium fractiflexum sp. nov. and two other species within the Gibberella fujikuroi species complex recently discovered in Japan that form aerial conidia in false heads, Mycoscience, 42, 461–478, https://doi.org/10.1007/BF02464343, 2001. a
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Borduas-Dedekind, N., Ossola, R., David, R. O., Boynton, L. S., Weichlinger, V., Kanji, Z. A., and McNeill, K.: Photomineralization mechanism changes the ability of dissolved organic matter to activate cloud droplets and to nucleate ice crystals, Atmos. Chem. Phys., 19, 12397–12412, https://doi.org/10.5194/acp-19-12397-2019, 2019. a
Budke, C. and Koop, T.: BINARY: an optical freezing array for assessing temperature and time dependence of heterogeneous ice nucleation, Atmos. Meas. Tech., 8, 689–703, https://doi.org/10.5194/amt-8-689-2015, 2015. a
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Short summary
A screening of more than 100 strains from 65 different species revealed that the ice nucleation activity within the fungal genus Fusarium is more widespread than previously assumed. Filtration experiments suggest that the single cell-free Fusarium IN is smaller than 100 kDa (~ 6 nm) and that aggregates can be formed in solution. Exposure experiments, freeze–thaw cycles, and long-term storage tests demonstrate a high stability of Fusarium IN under atmospherically relevant conditions.
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