First Report of Endolithic Members of Rhodosorus marinus (Stylonematales, Rhodophyta) Growing Inside Rhodoliths Offshore Louisiana, Northwestern Gulf of Mexico
First Report of Endolithic Members of Rhodosorus marinus (Stylonematales, Rhodophyta) Growing Inside Rhodoliths Offshore Louisiana, Northwestern Gulf of Mexico
复制标题
DOI：
10.3389/fmars.2020.00007
复制
发表时间：
2020-01-23
影响因子：
3.7
通讯作者：
Fredericq, Suzanne
中科院分区：
文献类型：
--
作者：
Krayesky-Self, Sherry;Phung, Delena;Fredericq, Suzanne
Endolithic，红色单细胞居住在内部的Lithothamnion rhodoliths，收集近海的西北墨西哥湾的mesophotic rhodoliths床在类似的54-55米的深度，并保持在封闭的缩影，被用来建立文化后，他们的隔离。这些石内单细胞随后发育成无定形斑点状的Palmelloid细胞集落。每个细胞含有不堆叠的，2-5裂的壁叶绿体，一个突出的中央核蛋白质，并有薄或厚的细胞壁。单个细胞或细胞簇（成对、四分体或多达12个）嵌入细胞外基质内，其边界保持紧密贴附于相邻细胞簇。细胞分裂凹凸分裂导致半球形细胞随后扩大的大小。质体tufA、psbA和16 SrDNA序列分析证实，该菌落为海洋红蕨（Rhodosorus marinus Geitler）。这是第一次报道的单细胞红宝石支出其生活史的一部分endolithically内生物成因的红宝石。
Endolithic, red unicells residing in the interior of Lithothamnion rhodoliths, collected offshore the NW Gulf of Mexico in mesophotic rhodolith beds at similar to 54-55 m depth and maintained in closed microcosms, were used to establish cultures following their isolation. These endolithic unicells subsequently developed into amorphous blobs of palmelloid cell colonies. Each cell contains unstacked, 2-5 lobed parietal chloroplasts, one prominent central pyrenoid, and have a thin or thick cell wall. Single cells, or cell clusters (in pairs, tetrads, or up to 12) are embedded inside an extracellular matrix whose boundaries remain closely appressed to neighboring cell clusters. Cell division by concavo-convex division resulted in hemispherical cells subsequently expanding in size. Plastid tufA, psbA and 16S rDNA sequence analyses confirmed that the colonies are Rhodosorus marinus Geitler. This is the first report of a unicellular red alga spending part of its life history endolithically inside biogenic rhodoliths.