Taxonomy and phylogeny of flattened species of Gracilaria (Gracilariceae, Rhodophyta) from Korea based on morphology and protein-coding plastid rbcL and psbA sequences
Taxonomy and phylogeny of flattened species of Gracilaria (Gracilariceae, Rhodophyta) from Korea based on morphology and protein-coding plastid rbcL and psbA sequences
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基于形态和蛋白质编码质体 rbcL 和 psbA 序列的韩国扁平植物江蓠（Gracilariceae，Rhodophyta）的分类学和系统发育
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发表时间：
2006
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通讯作者：
S. Boo
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作者：
M. Kim;E. Yang;S. Boo
M.-S。杨德昌、金世民，2006。基于形态学和蛋白编码质体rbcL和psbA序列的韩国江蓠属扁平种的分类与系统发育心理学报45:520-528。尽管对圆柱形葛属植物进行了广泛的研究，但该属扁平物种的分类和系统发育却很少受到关注。本文研究了韩国迄今报道的三种扁豆属植物的形态和分子系统发育。其特点是叶片比其他种类的更宽，边缘全缘或增生，皮质状的菌体质地，髓质中有1 - 3个大细胞，雄观较浅。江蓠呈膜质，有浅的精管概念（深度约10µm）。我们从韩国及周边海域的32份毛竹、杉木及其推定近缘种中提取了psbA和rbcL序列。来自韩国的23个样本，包括来自日本的2个样本，在rbcL和psbA区域几乎相同，除了一些样本存在1到4个核苷酸的差异。3个杉木标本rbcL和psbA含量相同。然而，我们没有发现在韩国发生的证据。在rbcL、psbA和rbcL + psbA数据集的所有分析中，均确定G. textorii为独特种，来自日本的G. incurvata为姊妹种。相对于虎尾草和虎尾草，虎尾草与大西洋虎尾草类群的亲缘关系更为密切。
M.-S. Kim, E.C. Yang and S.M. Boo. 2006. Taxonomy and phylogeny of flattened species of Gracilaria (Gracilariceae, Rhodophyta) from Korea based on morphology and protein-coding plastid rbcL and psbA sequences. Phycologia 45: 520–528. DOI: 10.2216/05-38.1 Despite extensive studies on cylindrical Gracilaria species, the taxonomy and phylogeny of the flattened species of the genus has received little attention. We studied the morphology and molecular phylogeny of three flattened species of Gracilaria, hitherto reported from Korea. Gracilaria textorii is characterized by having a wider blade relative to other species, margins entire or proliferous, coriaceous thallus texture, one to three large cells in the medulla, and shallow male conceptacles. Gracilaria cuneifolia is membranous in texture, and has shallow spermatangial conceptacles (approximately 10 µm in depth). We generated psbA and rbcL sequences from 32 specimens of G. textorii, G. cuneifolia and its putative relatives in Korea and surrounding waters. Twenty-three specimens of G. textorii from Korea, including two from Japan, were almost identical in both rbcL and psbA regions, except for some specimens that were different by one to four nucleotides. Three specimens of G. cuneifolia were identical in both rbcL and psbA. However, we found no evidence for the occurrence of G. incurvata in Korea. In all analyses of rbcL, psbA, and rbcL + psbA data sets, G. textorii was determined to be a unique species, with G. incurvata from Japan as a sister species. Gracilaria cuneifolia is more closely related to the G. tikvahiae group from the Atlantic than G. textorii and G. incurvata.