Tracking the Phylogeny of Seagrasses

Inferred from 18S rRNA Gene and Ancestral State Reconstruction of Morphological Data

verfasst von
Elangovan Dilipan, Christina Lucas, Jutta Papenbrock, Thirunavukarassu Thangaradjou
Abstract

Taxonomic challenges of seagrasses were met by using 18S ribosomal subunit of ribosomal deoxyribonucleic acid (18S rDNA) sequence data of 14 seagrass species from India and two temperate species from Germany. The phylogenetic trees presented are based on the 18S rDNA sequence analysis of 41 nucleotide sequences including sequences obtained in the present study as well as previously published sequences of freshwater and saltmarsh plants, and seagrasses for identifying the evolutionary lineage. The 18S rDNA data indicates independent origin of temperate and tropical seagrasses with the genus Halophila as the intermediate group for both the regions. Based on the complex morphological structures the Halophila group represents the basal form among seagrasses whereas Enhalus is considered to be the most recently originated seagrass species. In that context, the marine Hydrocharitaceae group of Enhalus, Thalassia and Halophila has been proposed to be separated into two groups such as Enhalus/Thalassia and Halophila subfamilies. Hence, the present systematic studies warrant a revised taxonomy for seagrasses, which better reflects the phylogenetic results obtained from molecular and conventional data.

Organisationseinheit(en)
Institut für Botanik
Externe Organisation(en)
Annamalai University
Shimadzu Deutschland GmbH
Typ
Artikel
Journal
Proceedings of the National Academy of Sciences India Section B - Biological Sciences
Band
88
Seiten
497-504
Anzahl der Seiten
8
ISSN
0369-8211
Publikationsdatum
17.08.2018
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Allgemeine Umweltwissenschaft, Allgemeine Agrar- und Biowissenschaften
Ziele für nachhaltige Entwicklung
SDG 14 – Lebensraum Wasser
Elektronische Version(en)
https://doi.org/10.1007/s40011-016-0780-5 (Zugang: Geschlossen)