Effects of atmospheric conditions on ice nucleation activity of Pseudomonas

Attard E, Yang H, Delort A-M, Amato P, Poeschl U, Glaux C, Koop T, Morris CE (2012)
Atmospheric Chemistry And Physics 12(22): 10667-10677.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Attard, E.; Yang, H.; Delort, A. -M.; Amato, P.; Poeschl, U.; Glaux, C.; Koop, ThomasUniBi ; Morris, C. E.
Abstract / Bemerkung
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 O-3 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 O-3 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 O-3 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 degrees C, the importance of bacterial ice nucleation in precipitation processes could be reduced by some environmental factors.
Erscheinungsjahr
2012
Zeitschriftentitel
Atmospheric Chemistry And Physics
Band
12
Ausgabe
22
Seite(n)
10667-10677
ISSN
1680-7324
eISSN
1680-7324
Page URI
https://pub.uni-bielefeld.de/record/2553566

Zitieren

Attard E, Yang H, Delort A-M, et al. Effects of atmospheric conditions on ice nucleation activity of Pseudomonas. Atmospheric Chemistry And Physics. 2012;12(22):10667-10677.
Attard, E., Yang, H., Delort, A. - M., Amato, P., Poeschl, U., Glaux, C., Koop, T., et al. (2012). Effects of atmospheric conditions on ice nucleation activity of Pseudomonas. Atmospheric Chemistry And Physics, 12(22), 10667-10677. doi:10.5194/acp-12-10667-2012
Attard, E., Yang, H., Delort, A. - M., Amato, P., Poeschl, U., Glaux, C., Koop, T., and Morris, C. E. (2012). Effects of atmospheric conditions on ice nucleation activity of Pseudomonas. Atmospheric Chemistry And Physics 12, 10667-10677.
Attard, E., et al., 2012. Effects of atmospheric conditions on ice nucleation activity of Pseudomonas. Atmospheric Chemistry And Physics, 12(22), p 10667-10677.
E. Attard, et al., “Effects of atmospheric conditions on ice nucleation activity of Pseudomonas”, Atmospheric Chemistry And Physics, vol. 12, 2012, pp. 10667-10677.
Attard, E., Yang, H., Delort, A.-M., Amato, P., Poeschl, U., Glaux, C., Koop, T., Morris, C.E.: Effects of atmospheric conditions on ice nucleation activity of Pseudomonas. Atmospheric Chemistry And Physics. 12, 10667-10677 (2012).
Attard, E., Yang, H., Delort, A. -M., Amato, P., Poeschl, U., Glaux, C., Koop, Thomas, and Morris, C. E. “Effects of atmospheric conditions on ice nucleation activity of Pseudomonas”. Atmospheric Chemistry And Physics 12.22 (2012): 10667-10677.
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