Kappa-/beta-carrageenans from Australian red algae of the Acrotylaceae (Gigartinales, Rhodophyta)

Chiovitti, A, Kraft, G, Bacic, A, Craik, David J. and Liao, M-L (2008) Kappa-/beta-carrageenans from Australian red algae of the Acrotylaceae (Gigartinales, Rhodophyta). Phycologia, 47 1: 35-40. doi:10.2216/07-10.1


Author Chiovitti, A
Kraft, G
Bacic, A
Craik, David J.
Liao, M-L
Title Kappa-/beta-carrageenans from Australian red algae of the Acrotylaceae (Gigartinales, Rhodophyta)
Journal name Phycologia   Check publisher's open access policy
ISSN 0031-8884
Publication date 2008-01-08
Year available 2008
Sub-type Article (original research)
DOI 10.2216/07-10.1
Open Access Status Not yet assessed
Volume 47
Issue 1
Start page 35
End page 40
Total pages 5
Editor Peter Burns
Place of publication Odense
Publisher International Phycological Society
Language eng
Subject C1
030403 Characterisation of Biological Macromolecules
970103 Expanding Knowledge in the Chemical Sciences
Abstract The extracelluar polysaccharides of five species of the family Acrotylaceae Schmitz [Acrotylus australis J. Agardh, Amphiplexia hymenocladioides J. Agardh, Antrocentrum nigrescens (Harvey) Kraft & Min-Thein, Hennedya crispa Harvey, and Ranavalona duckerae Kraft] were shown by compositional analyses, C-13 nuclear magnetic resonance spectroscopy, and Fourier transform infrared spectroscopy to be kappa (kappa)-/beta (beta)-carrageenans in which the kappa-carrageenan component is dominant. The uniform presence of kappa-/beta-carrageenans]ends support to the placement of these taxa in the Acrotylaceae based on similarities of procarp structures and highly distinctive centripetally developing gonimoblasts. However, a growing body of 18S rDNA nucleotide-sequence data indicates probable polyphyly for the existing family and the relatively widespread occurrence Of kappa-/beta-carrageenans among a number of families in the order Gigartinales. We regard these carrageenans most likely to represent a pleisiomorphic trait. One current member of the Acrotylaceae, Claviclonium ovatum (Lamouroux) Kraft & Min-Thein, is exceptional in producing a nearly idealized 6'O-methylated iota (iota)-carrageenan rather than kappa-/beta-carrageenan. This is a feature more akin to the distinctive, highly methylated carrageenans of the Areschougiaceae, a family only distantly related to the Acrotylaceae in molecular trees and which exhibits a substantially different mode of carposporophyte development from members of that group.
Keyword Plant Sciences
Marine & Freshwater Biology
Plant Sciences
Marine & Freshwater Biology
MARINE & FRESHWATER BIOLOGY
PLANT SCIENCES
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: 2009 Higher Education Research Data Collection
 
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Created: Thu, 16 Apr 2009, 19:22:07 EST by Jennifer Greder on behalf of Institute for Molecular Bioscience