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Low-molecular-mass carbohydrates and soluble polysaccharides of green and red morphs of Gracilaria domingensis (Gracilariales, Rhodophyta)
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Melina Guimarães
Published/Copyright:
December 12, 2007
Abstract
We studied the chemical structure and yield of low-molecular-mass carbohydrates (LMMC) and soluble polysaccharides produced by green and red morphs of Gracilaria domingensis. Red plants had higher amounts of the LMMC floridoside than green morphs (324.4±8.1 and 220.1±6.0 μmol g-1 dry biomass, respectively). The yield of polysaccharides was similar between morphs (46.3±5.8% for the red and 41.4±8.3% for the green) as was the monosaccharide composition. The same agaran (6-O-methylated and sulphated) was isolated from both morphs, as determined by 13C NMR spectroscopy analysis. The floridean starch content (mg g-1 dry biomass) for the green morphs (116.2±1.7) was lower than that of the red morphs (143.9±1.8). This study showed that green and red morphs of G. domingensis are similar in their polysaccharide composition, but differ in the short-term storage compounds, starch and floridoside. These differences may be related to light and shade photosynthetic strategies, which lead to different storage accumulation.
Received: 2006-5-29
Accepted: 2007-8-7
Published Online: 2007-12-12
Published in Print: 2007-12-01
©2007 by Walter de Gruyter Berlin New York
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Keywords for this article
agaran;
floridean starch;
floridoside;
Gracilaria;
phycocolloids;
pigment morphs
Articles in the same Issue
- Structure of this issue
- Is the cryptic alien seaweed Ulva pertusa (Ulvales, Chlorophyta) widely distributed along European Atlantic coasts?
- Daily timing of emersion and elevated atmospheric CO2 concentration affect photosynthetic performance of the intertidal macroalga Ulva lactuca (Chlorophyta) in sunlight
- Yucatán seaweeds from the offshore waters of Isla Mujeres, Quintana Roo, Mexico
- Dictyota dolabellana sp. nov. (Dictyotaceae, Phaeophyceae) based on morphological and chemical data
- Rostrupiella danica gen. et sp. nov., a Lulworthia-like marine lignicolous species from Denmark and the USA
- Ascoma development in the marine ascomycete Corollospora gracilis (Halosphaeriales, Hypocreomycetidae, Sordariomycetes)
- Low-molecular-mass carbohydrates and soluble polysaccharides of green and red morphs of Gracilaria domingensis (Gracilariales, Rhodophyta)
- Seaweed invasions: introduction and scope
- Introductions of seaweeds: accidental transfer pathways and mechanisms
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- Mechanisms of invasion: establishment, spread and persistence of introduced seaweed populations
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- Impacts of introduced seaweeds
- Control of invasive seaweeds
- Invasive seaweeds: global and regional law and policy responses
- Seaweed invasions: conclusions and future directions
- Author information Special Issue Seaweed Invasions
- Subject index Special Issue Seaweed Invasions
- Reviewer acknowledgement Bot. Mar. volume 50 (2007)
- Contents index Bot. Mar. volume 50 (2007)
- Author index Bot. Mar. volume 50 (2007)
- Genus/Species index Bot. Mar. volume 50 (2007)
