Taxonomy of the genus Padina (Dictyotales, Phaeophyceae) based on morphological and molecular evidences, with key to species identification

Ni Ni Win, Takeaki Hanyuda, Stefano G.A. Draisma, Phaik-Eem Lim, Siew-Moi Phang, Hiroshi Kawai

Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

Abstract

Taxonomic study of the brown algal genus Padina (Dictyotales, Phaeophyceae) mainly
from Southeast Asian countries, Japan, Hawaii, Australia and Taiwan as well as the Mediterranean Sea was conducted based on morphology and molecular phylogenetic analyses using chloroplast encoded large subunit RuBisCo (rbcL) gene sequences. Detailed descriptions of each species found in this study as well as key to species identifi cation are described. Several morphological characters, such as number of cell layers composing the thallus, presence or absence and degree of calcifi cation, presence or absence of small groups of rhizoid-like hairs, presence or absence of Vaughaniella stage, structure, position and arrangement of hairlines and reproductive sori, reproductive system (monoecism or dioecism), and presence or absence of indusium over/surrounding reproductive sori, are considered to be reliable morphological characters for species delineation. Variation of the presence (female gametophyte) and absence (male gametophyte and tetrasporophyte) of indusium was recognized in P. australis, indicating a necessary of a careful examination on this character. Molecular phylogenetic analyses using rbcL gene sequences revealed that multi-layered species formed monophyletic, whereas 2-layered and 2/4-layered species were paraphyletic. Only a single species with 2/3-layered thallus was included in the molecular analyses.
Original languageEnglish
Title of host publicationTaxonomy of Southeast Asian Seaweeds II
EditorsSiew-Moi Phang, Phaik-Eem Lim
Place of PublicationKuala Lumpur
PublisherUniversity of Malaya Press
Pages119
Number of pages174
ISBN (Print)978-983-100-687-0
Publication statusPublished - 2013

Publication series

NameMonograph Series 15

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  • Cite this

    Win, N. N., Hanyuda, T., Draisma, S. G. A., Lim, P-E., Phang, S-M., & Kawai, H. (2013). Taxonomy of the genus Padina (Dictyotales, Phaeophyceae) based on morphological and molecular evidences, with key to species identification. In S-M. Phang, & P-E. Lim (Eds.), Taxonomy of Southeast Asian Seaweeds II (pp. 119). (Monograph Series 15). University of Malaya Press.