A Morphological and Molecular Study on the Gracilariaceae (Gracilariales, Rhodophyta) around the Hakata Bay, Northern Kyushu, Japan

• Muangmai Narongrit

  Laboratory of Fisheries Biology, Department of Bioresource Sciences, Graduate School of Bioresource and Bioenvironmental Science, Kyushu University

• 山岸 幸正

  福山大学生命工学部海洋生物科学科

• 寺田 竜太

  鹿児島大学水産学部水産学科水産生物・海洋学分野

• 川口 栄男

  九州大学大学院生物資源環境科学府資源生物科学専攻動物・海洋生物資源学

抄録

Detailed morphological study on the plants of the Gracilariaceae around the Hakata Bay, northern Kyushu, Japan revealed that five species of the family were recognizable in this area. According to the previous description, they were assignable to Gracilaria chorda, G. cuneifolia, G. parvispora, G. textorii and G. vermiculophylla. Of these, only G. chorda was separated from the other four species by its lack of spermatangial cavities and nutrient tubular cells in cystocarps. As rbcL gene sequence analyses and the resultant phylogenetic trees (maximum parsimony, maximum likelihood, Bayesian inference) support this distinction, the four species were retained in the genus Gracilaria while G. chorda was considered to belong to Gracilariopsis, a genus that consists of species with superficial spermatangia and without nutrient tubular cells. In our phylogenetic trees, G. vermiculophylla was recovered as a basal species to all other Gracilaria species, which were positioned in the same evolutionary lineage. Interestingly, our specimens of G. vermiculophylla showed a mixture of spermatangial conceptacles, monocavitied (the verrucosa type) and multicavitied (the polycarvernosa type) on the same blade. However, the multicavitied conceptacle is a major character of other genus Hydropuntia within the Gracilariaceae. Further studies are thus necessary to clarify the relationship among these genera and to establish a better classification system of the family.

収録刊行物

• Journal of the Faculty of Agriculture, Kyushu University

  Journal of the Faculty of Agriculture, Kyushu University 57 (2), 411-420, 2012-09-20

  Faculty of Agriculture, Kyushu University

キーワード

• Gracilariaceae
• Gracilaria
• Gracilariopsis
• Hakata Bay
• phylogenetic analyses

詳細情報

• CRID: 1390009224683918976
• NII論文ID: 80022740911
• NII書誌ID: AA00247166
• DOI: 10.5109/25199
• HANDLE: 2324/25199
• ISSN: 00236152
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles