Algal Walls — Composition and Biosynthesis

Percival, Elizabeth; McDowell, Richard H.

doi:10.1007/978-3-642-68234-6_12

Cited by 43 publications

(30 citation statements)

References 200 publications

(137 reference statements)

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“…A distinct broad band in the spectrum of red algae is visible at $1230-1250 cm À1 which can be linked with P@O [20] and S@O [22], the latest could be associated with sulfonate groups which are present in carrageenan of red algae. In overall, IR spectra shows that green and brown algae are similar in terms of composition, while red algae have some distinct differences which correlates well with the literature [2][3][4]23].…”

Section: Characterisation Of Algaesupporting

confidence: 82%

PLA/algae composites: Morphology and mechanical properties

Bulota

Budtova

2015

Composites Part A: Applied Science and Manufacturing

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Section: Characterisation Of Algaesupporting

confidence: 82%

PLA/algae composites: Morphology and mechanical properties

Bulota

Budtova

2015

Composites Part A: Applied Science and Manufacturing

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“…It is generally acknowledged that in non-vascular plants the main cell wall constituents can be formed by carbohydrate polymers other than cellulose (for an overview, see Preston 1968Preston , 1974Percival and McDowell 1981). However, the presence of chitin in algae has been reported only in very few cases: remarkably, there has, as yet, been only one case published (to our knowledge) reporting chitin in chlorophycean algae, i.e.…”

Section: Discussionmentioning

confidence: 72%

A chitin-like glycan in the cell wall of a Chlorella sp. (Chlorococcales, Chlorophyceae)

Kapaun

Reißer

1995

Planta

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The stable amino-sugar fraction of the cell wall of the symbiotic Chlorella strain Pbi (Chlorophyceae) was isolated and investigated by sugar analysis, infra-red spectroscopy, lectin binding, enzymatic degradation, X-ray diffraction and electron microscopy. The results indicate the existence of a glycosaminoglycan which can be regarded as a chitin-like glycan. This carbohydrate structure is unusual for algae and reported here for the first time in unicellular chlorophycean algae. ment with H2SO4, generally considered to be necessary for cellulose degradation, did not result in any higher yield of hydrolysis products. Further investigations then showed that the cell wall fraction remaining after TFA treatment contained amino sugars.This observation could indicate the existence of chitin in the cell wall of a chlorophycean alga. In order to substantiate this surprising observation we analysed the rigid wall fraction of the symbiotic Chlorella strain Pbi (Reisser 1975) by different techniques, with a particular focus on the qualitative properties. In this paper we present the first report on a chitin-like glycan as a cell wall constituent of a coccoid chlorophycean alga.

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“…The bacteria reside either on the surface or within the algal cells (Hollants et al, 2011). Most algae, including siphonous varieties, excrete extracellular polymeric substances on their cell surface (Percival and McDowell, 1981;Ciancia et al, 2012). These excreta are densely settled and utilized by a great variety of heterotrophic bacteria (Lachnit et al, 2000;Goecke et al, 2010;Hollants et al, 2010Hollants et al, , 2012.…”

Section: Discussionmentioning

confidence: 99%

Tubular microfossils from ∼2.8 to 2.7Ga-old lacustrine deposits of South Africa: A sign for early origin of eukaryotes?

Kaźmierczak

Kremer

Altermann

et al. 2016

Precambrian Research

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Unequivocal evidence for Archean eukaryotic life has been long sought for and is a matter of lively debate. In the absence of unambiguous fossils this debate has focused on biogeochemical signatures and molecular phylogenies. Most researchers agree that fossil forms comparable with modern eukaryotic cells can be credibly identified only in Proterozoic (~1.8-1.6 Ga) and younger rocks. Herein, we report for the first time, Neoarchean mineralized tubular microfossils from ~2.8-2.7 Ga lacustrine deposits of South Africa. The exceptional preservation of these microfossils allows recognition of important morphological details in petrographic thin section and in HF-macerates that links them to modern siphonous (coenocytic) green or yellow-green microalgae (Chlorophyta and Xanthophyta). The microfossil identification is supported by Raman spectroscopic analyses, EPMA, SEM/BSE 2 and SEM/EDS microprobe analytical results, NanoSIMS elemental mapping and microtomographic sectioning of the thalli. All results point to indigenous, bona fide eukaryotic microfossils of algal affinity. These Neoarchean microalgae-like remains and their assumingly combined in vivo and early post-mortem precipitated mineral envelopes greatly improve our knowledge of early life and its habitats and may have far-reaching consequences for the studies of the evolution of life.

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Algal Walls — Composition and Biosynthesis

Cited by 43 publications

References 200 publications

PLA/algae composites: Morphology and mechanical properties

PLA/algae composites: Morphology and mechanical properties

A chitin-like glycan in the cell wall of a Chlorella sp. (Chlorococcales, Chlorophyceae)

Tubular microfossils from ∼2.8 to 2.7Ga-old lacustrine deposits of South Africa: A sign for early origin of eukaryotes?

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