Bacteria in clouds
Researchers are providing growing evidence that micororganisms can impact the weather conditions in the wet conditions of the clouds. Bacteria in clouds are using the energy stored in adenosine triphosphate to take care of their biochemical needs. Bacteria have been caught breaking down airborne carbon compounds, including organic aerosols. The bacteria called Pseudomonas Syringae, which is found regularly in clouds, has proteins on its cell surface that can nucleate the formation of ice, which is the precursor to most forms of precipitation. Some atmospheric scientists are also looking if P. Syringae and other bacteria in the air may influence weather by initiating rain and snow. P. Syringae uses its ice-nucleation skills to freeze water on the leaves of tea plant. The frost causes the plant cells to burst allowing the pathogenic bacterium to gain entry and infect the plant.
Everts, S. (2008). Bacteria in clouds.