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Effects of Atmospheric Conditions on Ice Nucleation Activity of Pseudomonas : Volume 12, Issue 4 (12/04/2012)

By Attard, E.

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Book Id: WPLBN0003982881
Format Type: PDF Article :
File Size: Pages 26
Reproduction Date: 2015

Title: Effects of Atmospheric Conditions on Ice Nucleation Activity of Pseudomonas : Volume 12, Issue 4 (12/04/2012)  
Author: Attard, E.
Volume: Vol. 12, Issue 4
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Glaux, C., Yang, H., Amato, P., Delort, A., Attard, E., Pöschl, U.,...Morris, C. E. (2012). Effects of Atmospheric Conditions on Ice Nucleation Activity of Pseudomonas : Volume 12, Issue 4 (12/04/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France. Although ice nuclei from bacterial origin are known to be efficient at the highest temperatures known for ice catalysts, quantitative data are still needed to assess their role in cloud processes. Here we studied the effects of three typical cloud conditions (i) acidic pH (ii) NO2 and O3 exposure and (iii) UV-A exposure on the ice nucleation activity (INA) of four Pseudomonas strains. Three of the Pseudomonas syringae strains were isolated from cloud water and the phyllosphere and Pseudomonas fluorescens strain CGina-01 was isolated from Antarctic glacier ice melt. Among the three conditions tested, acidic pH caused the most significant effects on INA likely due to denaturation of the ice nucleation protein complex. Exposure to NO2 and O3 gases had no significant or only weak effects on the INA of two P. syringae strains whereas the INA of P. fluorescens CGina-01 was significantly affected. The INA of the third P. syringae strain showed variable responses to NO2 and O3 exposure. These differences in the INA of different Pseudomonas suggest that the response to atmospheric conditions could be strain-specific. After UV-A exposure, a substantial loss of viability of all four strains was observed whereas their INA decreased only slightly. This corroborates the notion that under certain conditions dead bacterial cells can maintain their INA. Overall, the negative effects of the three environmental factors on INA were more significant at the warmer temperatures. Our results suggest that in clouds where temperatures are near 0 °C, the importance of bacterial ice nucleation in precipitation processes could be reduced by some environmental factors.

Summary
Effects of atmospheric conditions on ice nucleation activity of Pseudomonas

Excerpt
Amato, P., Menager, M., Sancelme, M., Laj, P., Mailhot, G., and Delort, A. M.: Microbial population in cloud water at the Puy de Dôme: implications for the chemistry of clouds, Atmos. Environ., 39, 4143–4153, 2005.; Amato P., Parazols M., Sancelme M., Laj P., Mailhot G., and Delort A. M.: Microorganisms isolated from the water phase of tropospheric clouds at the Puy de Dôme: major groups and growth abilities at low temperatures, FEMS Microbiol. Ecol., 59, 242–254, 2006.; Anderson, J. A. and Ashworth, E. N.: The effects of streptomycin, desiccation, and UV radiation on ice nucleation by Pseudomonas viridiflava, Plant Physiol., 80, 956, 1986.; Andreae, M. O. and Rosenfeld, D.: Aerosol-cloud-precipitation interactions. Part 1. The nature and sources of cloud-active aerosols, Earth-Sci. Rev., 89, 13–41, 2008.; Archuleta, C. M., DeMott, P. J., and Kreidenweis, S. M.: Ice nucleation by surrogates for atmospheric mineral dust and mineral dust/sulfate particles at cirrus temperatures, Atmos. Chem. Phys., 5, 2617–2634, doi:10.5194/acp-5-2617-2005, 2005.; Blondeaux, A., Hamel, J. F., Widehem, P., and Cochet, N.: Influence of water activity on the ice-nucleating activity of Pseudomonas syringae, J. Ind. Microbial. Biot., 23, 514–519, 1999.; Bowers, R. M., Lauber, C. L., Wiedinmyer, C., Hamady, M., Hallar, A. G., Fall, R., Knight, R., and Fierer, N.: Characterization of airborne microbial communities at a high-elevation site and their potential to act as atmospheric ice nuclei, Appl. Environ. Microbiol., 75, 5121–5130. 2009.; Chernoff, D. I. and Bertram, A. K.: Effects of sulfate coatings on the ice nucleation properties of a biological ice nucleus and several types of minerals, J. Geophys. Res., 115, D20205, doi:10.1029/2010JD014254, 2010.; Christner, B. C., Cai, R., Morris, C. E., McCarter, K. S., Foreman, C. M., Skidmore, M. L., Montross, S. N., and Sands, D. C.: Geographic, seasonal, and precipitation chemistry influence on the abundance and activity of biological ice nucleators in rain and snow, P. Natl. Acad. Sci., 105, 18854–18859, 2008a.; Christner, B. C., Morris, C. E., Foreman, C. M., Cai, R., and Sands, D. C.: Ubiquity of biological ice nucleators in snowfall, Science, 319, 1214–1214, 2008b.; DeMott, P., Cziczo, D., Prenni, A., Murphy, D., Kreidenweis, S., Thomson, D., Borys, R., and Rogers, D. C.: Measurements of the concentration and composition of nuclei for cirrus formation. P. Natl. Acad. Sci., 100, 14655–14660. 2003.; Dentener, F., Kinne, S., Bond, T., Boucher, O., Cofala, J., Generoso, S., Ginoux, P., Gong, S., Hoelzemann, J. J., Ito, A., Marelli, L., Penner, J. E., Putaud, J.-P., Textor, C., Schulz, M., van der Werf, G. R., and Wilson, J.: Emissions of primary aerosol and precursor gases in the years 2000 and 1750 prescribed data-sets for AeroCom, Atmos. Chem. Phys., 6, 4321–4344,

 

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