Morphology and molecular relationships of Leptofauchea leptophylla comb. nov. (Rhodymeniales, Rhodophyta) from Japan
Morphology and molecular relationships of Leptofauchea leptophylla comb. nov. (Rhodymeniales, Rhodophyta) from Japan
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Leptofauchea leptophylla 梳的形态学和分子关系。
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发表时间：
2012
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通讯作者：
M. Yoshizaki
中科院分区：
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作者：
Masahiro Suzuki;H. Nozaki;Ryuta Terada;T. Kitayama;T. Hashimoto;M. Yoshizaki
铃木M.，野崎H Terada河，Kitayama T.，桥本和Yoshizaki M. 2012.日本薄叶纤方藻的形态学和分子亲缘关系。Phycologia 51：479-488. DOI：10.2216/11-78.1基于核编码大亚基核糖体RNA（LSU rRNA）基因序列，对日本一种鲜为人知的物种Gloiocladia leptophylla进行了详细的形态学研究和分子分析。对新采集的标本和正模标本进行了检验。本文首次描述了四孢子囊线虫、十字交叉分裂的四孢子囊和雄配子体的结构。我们发现，这个物种有一个薄的皮层，十字交叉划分的四孢子囊形成在nemathelae和一个特拉arachnoidea（网络的内部果皮丝周围成熟的果孢子体），在属Leptofauchea。LSU rRNA分析解决了G. Leptophylla在Faucheaceae（其中它是稳健地从Gloiocladia分离），形成了一个良好支持的分支与Leptofauchea的其他五个物种和Webervanbossea的两个物种。因此，我们提出了一个新组合Leptofauchea leptophylla comb. nov.。leptophylla属内。
Suzuki M., Nozaki H., Terada R., Kitayama T., Hashimoto T. and Yoshizaki M. 2012. Morphology and molecular relationships of Leptofauchea leptophylla comb. nov. (Rhodymeniales, Rhodophyta) from Japan. Phycologia 51: 479–488. DOI: 10.2216/11-78.1 Detailed morphological studies and molecular analyses based on nuclear-encoded large subunit ribosomal RNA (LSU rRNA) gene sequences were undertaken on Gloiocladia leptophylla, a poorly known species from Japan. Both newly collected samples and the holotype were examined. Herein we describe for the first time the structure of tetrasporangial nemathecia, decussately dividing tetrasporangia and male gametophytes. We show that this species has a thin cortex, decussately divided tetrasporangia formed in nemathecia and a tela arachnoidea (network of inner pericarp filaments surrounding mature carposporophytes), as in the genus Leptofauchea. LSU rRNA analyses resolved G. leptophylla in the Faucheaceae (in which it was robustly separated from Gloiocladia), forming a well-supported clade with five other species of Leptofauchea and two species of Webervanbossea. We therefore propose the new combination Leptofauchea leptophylla comb. nov. Iridescence in water, a distinct short stipe and a medulla composed of three to four cell layers are conspicuous diagnostic characters of L. leptophylla within the genus.