Soriano María I, Roibás Begoña, García Ana B, Espinosa-Urgel Manuel
Department of Environmental Protection, Estación Experimental del Zaidín, CSIC, 18008 Granada, Spain.
J Circadian Rhythms. 2010 Sep 16;8:8. doi: 10.1186/1740-3391-8-8.
Examples of circadian rhythms have been described in eukaryotic organisms and in photosynthetic bacteria, but direct proof of their existence in other prokaryotes is limited and has been largely ignored. The aim of this article is to review existing evidence and to present preliminary results that suggest that the heterotrophic bacterium Pseudomonas putida shows regular variations in its growth pattern synchronized with light/darkness cycles. We put forward the hypothesis that circadian regulation of certain processes can take place in non-photosynthetic prokaryotes and may represent an adaptative advantage in specific environments.
在真核生物和光合细菌中已描述了昼夜节律的实例，但在其他原核生物中其存在的直接证据有限，且在很大程度上被忽视了。本文的目的是回顾现有证据，并展示初步结果，这些结果表明异养细菌恶臭假单胞菌的生长模式呈现出与光/暗周期同步的规律性变化。我们提出假说，即在非光合原核生物中某些过程可能存在昼夜节律调节，这在特定环境中可能代表一种适应性优势。
