Hernández-Muñiz W, Stevens S E
Department of Molecular and Cell Biology, Pennsylvania State University, University Park 16802.
J Bacteriol. 1988 Apr;170(4):1519-22. doi: 10.1128/jb.170.4.1519-1522.1988.
Loops and braids in filaments of the cyanobacterium Mastigocladus laminosus were observed. Braided filaments were generally in the form of a right-handed helix (87%) but were occasionally observed as left-handed helices (13%). It was demonstrated by time-lapse photomicrography that braids continued to grow as braids and that loops coiled into braids as growth proceeded. Measurements of the distance between grooves in 74 braids yielded an average distance of 13 +/- 3 micron, a result which suggests that braid formation is not random. We propose that the braids arise as a consequence of the helical growth of cells that make up the filaments of M. laminosus.
观察到蓝细菌层状鞭枝藻（Mastigocladus laminosus）丝状体中的环和辫状结构。辫状丝状体通常呈右手螺旋形式（87%），但偶尔也观察到左手螺旋形式（13%）。延时显微摄影表明，辫状结构会持续以辫状形式生长，并且随着生长进行，环会盘绕成辫状。对74个辫状结构中凹槽间距离的测量得出平均距离为13±3微米，这一结果表明辫状结构的形成并非随机。我们认为，辫状结构是由构成层状鞭枝藻丝状体的细胞螺旋生长所导致的。
