Symbiotic Interactions

Adams, David G.

doi:10.1007/0-306-46855-7_19

Cited by 36 publications

(36 citation statements)

References 227 publications

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“…Cyanobacteria are highly diverse in terms of morphology: Some species are filamentous, others are unicellular or can form aggregates, several species are capable of nitrogen fixation in differentiated heterocysts, and some form motile hormogonia or spore-like akinetes (Flores and Herrero, 2010;Singh and Montgomery, 2011). In their natural environment, cyanobacteria are often an integral part of complex ecosystems with other species from all three domains of life (Stewart et al, 1983;Adams, 2000;Adams and Duggan, 2008). Several species build up thick microbial mats in extreme environments (Reysenbach et al, 1994) or composite with fungal filaments to form lichens (Rikkinen et al, 2002), while others live inside their symbiotic plant hosts (Adams, 2000).…”

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confidence: 99%

“…In their natural environment, cyanobacteria are often an integral part of complex ecosystems with other species from all three domains of life (Stewart et al, 1983;Adams, 2000;Adams and Duggan, 2008). Several species build up thick microbial mats in extreme environments (Reysenbach et al, 1994) or composite with fungal filaments to form lichens (Rikkinen et al, 2002), while others live inside their symbiotic plant hosts (Adams, 2000). In case of the aquatic Azolla caroliniana, a small water fern, a filamentous, heterocyst-forming cyanobacterium is found within the ovoid cavities in the plant's leaves, maintaining a mutually beneficial symbiotic relationship with the plant.…”

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A Comprehensively Curated Genome-Scale Two-Cell Model for the Heterocystous Cyanobacterium Anabaena sp. PCC 7120

2016

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ORCID IDs: 0000-0002-4155-2085 (D.M.); 0000-0001-7618-8204 (P.R.J.).Anabaena sp. PCC 7120 is a nitrogen-fixing filamentous cyanobacterium. Under nitrogen-limiting conditions, a fraction of the vegetative cells in each filament terminally differentiate to nongrowing heterocysts. Heterocysts are metabolically and structurally specialized to enable O 2 -sensitive nitrogen fixation. The functionality of the filament, as an association of vegetative cells and heterocysts, is postulated to depend on metabolic exchange of electrons, carbon, and fixed nitrogen. In this study, we compile and evaluate a comprehensive curated stoichiometric model of this two-cell system, with the objective function based on the growth of the filament under diazotrophic conditions. The predicted growth rate under nitrogen-replete and -deplete conditions, as well as the effect of external carbon and nitrogen sources, was thereafter verified. Furthermore, the model was utilized to comprehensively evaluate the optimality of putative metabolic exchange reactions between heterocysts and vegetative cells. The model suggested that optimal growth requires at least four exchange metabolites. Several combinations of exchange metabolites resulted in predicted growth rates that are higher than growth rates achieved by only considering exchange of metabolites previously suggested in the literature. The curated model of the metabolic network of Anabaena sp. PCC 7120 enhances our ability to understand the metabolic organization of multicellular cyanobacteria and provides a platform for further study and engineering of their metabolism.

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A Comprehensively Curated Genome-Scale Two-Cell Model for the Heterocystous Cyanobacterium Anabaena sp. PCC 7120

2016

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“…Each individual cell of filamentous blue-green algae typically has a thick, gelatinous cell wall, and they lack flagella, but some species of filaments can move around by gliding along surfaces. They grow as free-living organisms and in symbiotic associations with a wide range of lower and higher plants [5]. Due to have a strong ability to adapt, blue-green algae can be found in almost every terrestrial and aquatic habitat including extreme environments, such as sub-zero Arcitc ice, hot spring (50 8C), deserts and rock surfaces [6,7].…”

Section: Introduction To Algaementioning

confidence: 99%

The research progress of CO2 sequestration by algal bio-fertilizer in China

Wang

Peng

Huang

2015

Journal of CO2 Utilization

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“…Mutualistic associations of oxygenic photosynthetic microorganisms (cyanobacteria and unicellular eukaryotic algae) with aquatic invertebrates occur in a wide variety of algal and animal taxa (Adams, 2000;Paracer & Ahmadjian, 2000;Nybakken & Bertness, 2003;Venn et al, 2008). This type of association is most commonly found in tropical marine subtidal areas, especially coral reef lagoons, but is also occasionally observed in temperate marine and freshwater basins.…”

Section: Introductionmentioning

confidence: 99%

Ultrastructural and microspectrophotometric characterization of multiple species of cyanobacterial photosymbionts coexisting in the colonial ascidianTrididemnum clinides(Tunicata, Ascidiacea, Didemnidae)

Hirose

Uchida

Murakami

2009

European Journal of Phycology

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Trididemnum clinides is a multi-photosymbiotic ascidian that inhabits shallow coral reef lagoons. Three types of cyanobacteria are harboured in the tunic of the ascidian colony; of these, two are unicellular coccoid cyanobacteria and the other is a multicellular filamentous type. They also differ in ultrastructure and distribution patterns within the host tunic. Microspectrophotometric analysis revealed the composition of photosynthetic pigments in each photosymbiont. One of the coccoid types is yellowish-green and is distributed under the colony surface. This photosymbiont cell preferentially absorbs red and blue light, and therefore the dominant colour in the inner tunic is green. The other two types of coexisting photosymbionts contain the green-light-absorbing R-phycoerythrin as the major photosynthetic pigment; they exploit the wavelengths of light not used by the first type of photosymbiont. In T. clinides, the outer and inner photosymbionts in the tunic have different photosynthetic pigments, which adapt to each microhabitat, thereby sharing the incident light resources effectively.

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Symbiotic Interactions

Cited by 36 publications

References 227 publications

A Comprehensively Curated Genome-Scale Two-Cell Model for the Heterocystous Cyanobacterium Anabaena sp. PCC 7120

A Comprehensively Curated Genome-Scale Two-Cell Model for the Heterocystous Cyanobacterium Anabaena sp. PCC 7120

The research progress of CO2 sequestration by algal bio-fertilizer in China

Ultrastructural and microspectrophotometric characterization of multiple species of cyanobacterial photosymbionts coexisting in the colonial ascidianTrididemnum clinides(Tunicata, Ascidiacea, Didemnidae)

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