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Bacteria Are Key Rainmakers

机译:细菌是关键的造雨者

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While airborne dust is known to be an abundant component in the formation of rain and snow, a study in February found that bacteria lofted into the atmosphere might also be a big part of the rainmaking mix. For more than 20 years, scientists have tossed around the idea that bacteria play a role in precipitation. The speculation began because of the curious case of the bacterium Pseudomonas syhngae, a plant pathogen that promotes frost damage on crops. A protein on the cell surface of P. syringae binds water in a way that mimics the structure of an ice crystal, and this helps start the transformation of cold water into ice. Moreover, studies suggest that bacteria travel from one patch of farmland to another by evaporating into the sky and then raining back down.
机译:虽然众所周知,空气中的尘埃是形成雨雪的重要成分,但二月份的一项研究发现,散布到大气中的细菌也可能是造成降雨的主要部分。 20多年来,科学家们一直认为细菌在降水中起作用。人们开始猜测是因为好奇的细菌假单胞菌假单胞菌(Pseudomonas syhngae),这种植物病原体会促进农作物的霜冻破坏。丁香假单胞菌细胞表面的蛋白质以模仿冰晶结构的方式与水结合,这有助于开始将冷水转化为冰。此外,研究表明,细菌通过蒸发进入天空然后再下雨而从一个农田迁移到另一个农田。

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