No effect of N or P deficiency on capsule regeneration in Staurodesmus convergens (Zygnematophyceae, Chlorophyta)

Gouvêa, Sandra P.; Vieira, Armando Augusto Henriques; Lombardi, Ana Teresa

doi:10.2216/i0031-8884-41-6-585.1

Cited by 7 publications

(10 citation statements)

References 7 publications

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“…iversenii Nygaard (Pacobahyba et al 2004), and Staurodesmus convergens (Ehrenb. ex Ralfs) Teiling (Gouvea et al 2002), although Xyl was present only in small amounts in these desmids. Lombardi et al (1998) reported a rhamnose (Rha)rich and Man-rich EPS from Micrasterias furcata C. Agardh ex Ralfs that is distinct from all desmids surveyed.…”

Section: Discussionmentioning

confidence: 91%

“…2004), and Staurodesmus convergens (Ehrenb. ex Ralfs) Teiling (Gouvea et al. 2002), although Xyl was present only in small amounts in these desmids.…”

Section: Discussionmentioning

confidence: 96%

“…3-Fuc is the second most abundant fucosyl residue in the P. trabecula EPS and is found in significant amounts in the EPS of P. margaritaceum (Domozych et al 2005), Closterium sp. (Domozych et al 1993), S. convergens (Gouvea et al 2002), H. dissiliens , and S. panduriforme , indicating the importance of 3-Fuc to the structure and function of desmid EPS. Although Xyl is not always a major component of desmid EPS, it occurs predominately as t-Xyl in the majority of desmids surveyed, including P. trabecula, Cosmarium sp.…”

Section: Discussionmentioning

confidence: 99%

“…(Domozych et al. 1993), S. convergens (Gouvea et al. 2002), H. dissiliens (Vieira and Paulsen 1994), and S. panduriforme (Paulsen and Vieira 1994), indicating the importance of 3‐Fuc to the structure and function of desmid EPS.…”

Section: Discussionmentioning

confidence: 99%

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Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms¹

Domozych

Elliott

Kiemle

et al. 2007

Journal of Phycology

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Pleurotaenium trabecula (Ehren.) Nägeli is a placoderm desmid that commonly occurs in wetland biofilms of the southeastern Adirondacks (NY, USA). It often displays a distinctive habit whereby the cell remains attached to the substrate via the polar end of one semicell, while the remainder of the cell is suspended in the water column. In this study, we examined the extracellular matrix (ECM) of this alga to elucidate its adhesion mechanisms and postadhesion behavior. The ECM consists of the following: (i) an extracellular polymeric substance (EPS), which includes polyanionic and sulfated polysaccharides; (ii) a thin pectin-containing primary cell wall, which is quickly sloughed off after postcytokinetic semicell expansion; and (iii) a thick secondary cell wall that is perforated with a distinct pore complex. Each pore of this complex possesses an external network of densely aggregated fibrils. Selective solubilization and immunolabeling studies suggest that these fibrillar aggregates or ''adhesion centers'' (i.e., ACs) contain arabinogalactan protein and are involved in initial adhesion of the cell to a substrate. We propose that postinitial adhesion behavior entails localized secretion of EPS derived from a large pool of EPS-containing vesicles situated in the peripheral cytoplasm. As the EPS absorbs water, hygroscopic pressure breaks the connections between the ACs on the cell wall and substrate and allows a portion of a cell to lift up into the water column.

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Section: Discussionmentioning

confidence: 91%

“…2004), and Staurodesmus convergens (Ehrenb. ex Ralfs) Teiling (Gouvea et al. 2002), although Xyl was present only in small amounts in these desmids.…”

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms¹

Domozych

Elliott

Kiemle

et al. 2007

Journal of Phycology

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“…Mucilage capsules have been reported to result from diverse adaptative strategies, including buoyancy improvement, grazing reduction, and selective permeability (Reynolds 2007). Although the formation of a capsule itself is not influenced by nutrient availability in Staurodesmus convergens (Gouvêa et al. 2002), the thickness and texture of the mucilage formed vary with the environment (Reynolds 2007).…”

mentioning

confidence: 99%

CARBOHYDRATE RELEASE BY A SUBTROPICAL STRAIN OF SPONDYLOSIUM PYGMAEUM (ZYGNEMATOPHYCEAE): INFLUENCE OF NITRATE AVAILABILITY AND CULTURE AGING¹

Piedras

Baisch

Machado

et al. 2010

Journal of Phycology

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This paper describes the influence of nitrate availability on growth and release of dissolved free and combined carbohydrates (DFCHOs and DCCHOs) produced by Spondylosium pygmaeum (Cooke) W. West (Zygnematophyceae). This strain was isolated from a subtropical shallow pond, located at the extreme south of Brazil (Rio Grande, RS). Experiments were carried out in batch culture, comparing two initial nitrate levels (10 ⁄ 100 lM) in the medium. Growth was monitored by direct microscopic cell counts and chl a content. Nitrate consumption was determined by ion chromatography, while the production of extracellular carbohydrates was monitored by the phenol-sulfuric method. The monosaccharide compositions of DFCHOs and DCCHOs were determined in each growth phase by HPLC with pulse amperometric detection (HPLC-PAD). At the end of the experiment, the total composition of extracellular polysaccharide (EPS) molecules >12 kDa was determined by gas chromatography. Nitrate availability had no influence on S. pygmaeum cell density at any phase. On the other hand, chl a content decreased after a few days growth when the availability of nitrate was restricted, but continued to rise when nitrate was plentiful. Also, nitrate depletion was faster at 10 lM nitrate. No influence of the growth phase or nitrate availability on the total carbohydrates (TDCHOs) released per cell was observed. Only DCCHOs were released by S. pygmaeum, and the composition varied between growth phases, especially at lower nitrate availability. EPS molecules >12 kDa were composed mainly of xylose, fucose, and galactose, as for other desmids. However, a high N-acetyl-glucosamine content was found, uniquely among desmid EPSs.

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Copper and cadmium complexation by high molecular weight materials of dominant microalgae and of water from a eutrophic reservoir

2005

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No effect of N or P deficiency on capsule regeneration in Staurodesmus convergens (Zygnematophyceae, Chlorophyta)

Cited by 7 publications

References 7 publications

Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms¹

Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms¹

CARBOHYDRATE RELEASE BY A SUBTROPICAL STRAIN OF SPONDYLOSIUM PYGMAEUM (ZYGNEMATOPHYCEAE): INFLUENCE OF NITRATE AVAILABILITY AND CULTURE AGING¹

Copper and cadmium complexation by high molecular weight materials of dominant microalgae and of water from a eutrophic reservoir

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No effect of N or P deficiency on capsule regeneration in Staurodesmus convergens (Zygnematophyceae, Chlorophyta)

Cited by 7 publications

References 7 publications

Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms1

Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms1

CARBOHYDRATE RELEASE BY A SUBTROPICAL STRAIN OF SPONDYLOSIUM PYGMAEUM (ZYGNEMATOPHYCEAE): INFLUENCE OF NITRATE AVAILABILITY AND CULTURE AGING1

Copper and cadmium complexation by high molecular weight materials of dominant microalgae and of water from a eutrophic reservoir

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Product

Resources

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Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms¹

Pleurotaenium trabecula, a desmid of wetland biofilms: the extracellular matrix and adhesion mechanisms¹

CARBOHYDRATE RELEASE BY A SUBTROPICAL STRAIN OF SPONDYLOSIUM PYGMAEUM (ZYGNEMATOPHYCEAE): INFLUENCE OF NITRATE AVAILABILITY AND CULTURE AGING¹