Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions

Abstract Pseudomonas syringae produces highly efficient biological ice nuclei (IN) that were proposed to influence precipitation by freezing water in clouds. This bacterium may be capable of dispersing through the atmosphere, having been reported in rain, snow, and cloud water samples. This study as...

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Autores principales:	Gabriel Guarany de Araujo, Fabio Rodrigues, Fabio Luiz Teixeira Gonçalves, Douglas Galante
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2019
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/46e91752b03a4127a389a423b2826d67
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spelling	oai:doaj.org-article:46e91752b03a4127a389a423b2826d672021-12-02T15:09:14ZSurvival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions10.1038/s41598-019-44283-32045-2322https://doaj.org/article/46e91752b03a4127a389a423b2826d672019-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-019-44283-3https://doaj.org/toc/2045-2322Abstract Pseudomonas syringae produces highly efficient biological ice nuclei (IN) that were proposed to influence precipitation by freezing water in clouds. This bacterium may be capable of dispersing through the atmosphere, having been reported in rain, snow, and cloud water samples. This study assesses its survival and maintenance of IN activity under stressing conditions present at high altitudes, such as UV radiation within clouds. Strains of the pathovars syringae and garcae were compared to Escherichia coli. While UV-C effectively inactivated these cells, the Pseudomonas were much more tolerant to UV-B. The P. syringae strains were also more resistant to radiation from a solar simulator, composed of UV-A and UV-B, while only one of them suffered a decline in IN activity at −5 °C after long exposures. Desiccation at different relative humidity values also affected the IN, but some activity at −5 °C was always maintained. The pathovar garcae tended to be more resistant than the pathovar syringae, particularly to desiccation, though its IN were found to be generally more sensitive. Compared to E. coli, the P. syringae strains appear to be better adapted to survival under conditions present at high altitudes and in clouds.Gabriel Guarany de AraujoFabio RodriguesFabio Luiz Teixeira GonçalvesDouglas GalanteNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 9, Iss 1, Pp 1-11 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Gabriel Guarany de Araujo Fabio Rodrigues Fabio Luiz Teixeira Gonçalves Douglas Galante Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions
description	Abstract Pseudomonas syringae produces highly efficient biological ice nuclei (IN) that were proposed to influence precipitation by freezing water in clouds. This bacterium may be capable of dispersing through the atmosphere, having been reported in rain, snow, and cloud water samples. This study assesses its survival and maintenance of IN activity under stressing conditions present at high altitudes, such as UV radiation within clouds. Strains of the pathovars syringae and garcae were compared to Escherichia coli. While UV-C effectively inactivated these cells, the Pseudomonas were much more tolerant to UV-B. The P. syringae strains were also more resistant to radiation from a solar simulator, composed of UV-A and UV-B, while only one of them suffered a decline in IN activity at −5 °C after long exposures. Desiccation at different relative humidity values also affected the IN, but some activity at −5 °C was always maintained. The pathovar garcae tended to be more resistant than the pathovar syringae, particularly to desiccation, though its IN were found to be generally more sensitive. Compared to E. coli, the P. syringae strains appear to be better adapted to survival under conditions present at high altitudes and in clouds.
format	article
author	Gabriel Guarany de Araujo Fabio Rodrigues Fabio Luiz Teixeira Gonçalves Douglas Galante
author_facet	Gabriel Guarany de Araujo Fabio Rodrigues Fabio Luiz Teixeira Gonçalves Douglas Galante
author_sort	Gabriel Guarany de Araujo
title	Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions
title_short	Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions
title_full	Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions
title_fullStr	Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions
title_full_unstemmed	Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions
title_sort	survival and ice nucleation activity of pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions
publisher	Nature Portfolio
publishDate	2019
url	https://doaj.org/article/46e91752b03a4127a389a423b2826d67
work_keys_str_mv	AT gabrielguaranydearaujo survivalandicenucleationactivityofpseudomonassyringaestrainsexposedtosimulatedhighaltitudeatmosphericconditions AT fabiorodrigues survivalandicenucleationactivityofpseudomonassyringaestrainsexposedtosimulatedhighaltitudeatmosphericconditions AT fabioluizteixeiragoncalves survivalandicenucleationactivityofpseudomonassyringaestrainsexposedtosimulatedhighaltitudeatmosphericconditions AT douglasgalante survivalandicenucleationactivityofpseudomonassyringaestrainsexposedtosimulatedhighaltitudeatmosphericconditions
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Survival and ice nucleation activity of Pseudomonas syringae strains exposed to simulated high-altitude atmospheric conditions

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