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首页> 外文期刊>Applied Microbiology >Surface Orientation Affects the Direction of Cone Growth by Leptolyngbya sp. Strain C1, a Likely Architect of Coniform Structures Octopus Spring (Yellowstone National Park)
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Surface Orientation Affects the Direction of Cone Growth by Leptolyngbya sp. Strain C1, a Likely Architect of Coniform Structures Octopus Spring (Yellowstone National Park)

机译：表面取向影响鳞状鳞癌的锥状生长方向。 C1株，可能是圆锥形结构章鱼春天的建筑师（黄石国家公园）

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Laminated, microbially produced stromatolites within the rock record provide some of the earliest evidence for life on Earth. The chemical, physical, and biological factors that lead to the initiation of these organosedimentary structures and shape their morphology are unclear. Modern coniform structures with morphological features similar to stromatolites are found on the surface of cyanobacterial/microbial mats. They display a vertical element of growth, can have lamination, can be lithified, and observably grow with time. To begin to understand the microbial processes and interactions required for cone formation, we determined the phylogenetic composition of the microbial community of a coniform structure from a cyanobacterial mat at Octopus Spring, Yellowstone National Park, and reconstituted coniform structures in vitro . The 16S rRNA clone library from the coniform structure was dominated by Leptolyngbya sp. Other cyanobacteria and heterotrophic bacteria were present in much lower abundance. The same Leptolyngbya sp. identified in the clone library was also enriched in the laboratory and could produce cones in vitro . When coniform structures were cultivated in the laboratory, the initial incubation conditions were found to influence coniform morphology. In addition, both the angle of illumination and the orientation of the surface affected the angle of cone formation demonstrating how external factors can influence coniform, and likely, stromatolite morphology.
机译：岩石记录中的层状，微生物产生的叠层石为地球上的生命提供了最早的证据。导致这些有机糖沉积结构的起始并影响其形态的化学，物理和生物学因素尚不清楚。在蓝细菌/微生物垫的表面发现了具有类似于叠层石的形态特征的现代圆锥形结构。它们显示出垂直的生长元素，可以具有层压作用，可以被石化，并且可以观察到随时间增长。为了开始理解锥形成所需的微生物过程和相互作用，我们确定了黄石国家公园八达通春季市蓝藻垫上锥状结构微生物群落的系统发育组成，并在体外重建了锥状结构。来自圆锥形结构的16S rRNA克隆文库被钩端螺旋体占主导地位。其他蓝细菌和异养细菌的丰度要低得多。相同的Leptolyngbya sp。在克隆库中鉴定的蛋白在实验室中也得到了丰富，并可以在体外产生视锥细胞。当在实验室中培养圆锥形结构时，发现初始孵育条件会影响圆锥形形态。此外，照明角度和表面方向都影响圆锥形成的角度，表明外部因素如何影响圆锥形和层状沸石的形态。

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