A unique self-organization of bacterial sub-communities creates iridescence in Cellulophaga lytica colony biofilms.
A unique self-organization of bacterial sub-communities creates iridescence in Cellulophaga lytica colony biofilms.
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DOI：
10.1038/srep19906
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发表时间：
2016-01-28
影响因子：
4.6
通讯作者：
Rosenfeld E
中科院分区：
文献类型：
--
作者：
Kientz B;Luke S;Vukusic P;Péteri R;Beaudry C;Renault T;Simon D;Mignot T;Rosenfeld E
彩虹色外观在自然界中很普遍。它们产生于光与微米和亚微米大小的物理结构的相互作用，这些物理结构以周期性几何形状在空间上排列，并且通常与明亮的角度相关色调相关。据报道，许多动物和海洋生物都具有虹彩。然而，虹彩在细菌中尚未得到充分研究。最近，我们报道了海洋黄杆菌菌落生物膜中的明亮“点画”彩虹色，表现出滑动运动性。它们虹彩的机制尚不清楚。在这里，我们采用多学科方法，证明彩虹色的原因是集落生物膜中细胞群的独特周期性。细胞排列在一起形成六角形光子晶体。我们的模型强调了细菌生物膜中自组织的新模式。 “点画”细菌虹彩可以被认为是微生物学领域的一种新的光依赖性现象。
Iridescent color appearances are widespread in nature. They arise from the interaction of light with micron- and submicron-sized physical structures spatially arranged with periodic geometry and are usually associated with bright angle-dependent hues. Iridescence has been reported for many animals and marine organisms. However, iridescence has not been well studied in bacteria. Recently, we reported a brilliant “pointillistic” iridescence in colony biofilms of marine Flavobacteria that exhibit gliding motility. The mechanism of their iridescence is unknown. Here, using a multi-disciplinary approach, we show that the cause of iridescence is a unique periodicity of the cell population in the colony biofilm. Cells are arranged together to form hexagonal photonic crystals. Our model highlights a novel pattern of self-organization in a bacterial biofilm. ”Pointillistic” bacterial iridescence can be considered a new light-dependent phenomenon for the field of microbiology.