Book ChapterDOI
Akinetes: Dormant Cells of Cyanobacteria
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TLDR
This review focuses on akinetes of Nostocales, emphasizing environmental triggers and cellular responses involved in differentiation, maturation, dormancy, and germination of these resting cells and special attention is given to genetic regulation of the differentiation process.Abstract:
Cyanobacteria are an ancient and morphologically diverse group of photosynthetic prokaryotes, which were the first to evolve oxygenic photosynthesis. Cyanobacteria are widely distributed in diversed environments. In the case of members of the orders Nostocales and Stigonematales, their persistence and success were attributed to their ability to form specialized cells: heterocysts, capable of fixing atmospheric nitrogen and spore-like cells, the akinetes. This review focuses on akinetes of Nostocales, emphasizing environmental triggers and cellular responses involved in differentiation, maturation, dormancy, and germination of these resting cells. Morphological and structural changes, variation in akinete composition, and metabolism are summarized. Special attention is given to the genetic regulation of the differentiation process in an attempt to close gaps in our understanding of the dormancy phenomenon in cyanobacteria and to identify open questions for future research.read more
Citations
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Journal ArticleDOI
Eco-physiological adaptations that favour freshwater cyanobacteria in a changing climate
Cayelan C. Carey,Bastiaan Willem Ibelings,Emily P. Hoffmann,David P. Hamilton,Justin D. Brookes +4 more
TL;DR: This Review examines how several cyanobacterial eco-physiological traits, specifically, the ability to grow in warmer temperatures; buoyancy; high affinity for, and ability to store, phosphorus; nitrogen-fixation; akinete production; and efficient light harvesting, vary amongst cyanobacteria genera and may enable them to dominate in future climate scenarios.
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The interaction between climate warming and eutrophication to promote cyanobacteria is dependent on trophic state and varies among taxa
TL;DR: In this paper, the authors investigated the contribution of temperature and nutrients in promoting phytoplankton and cyanobacterial biovolume in freshwater lakes and found that the interaction between these two factors explained more of the variance in cyanobacteria biovolate than each factor alone.
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Invasion of Nostocales (cyanobacteria) to Subtropical and Temperate Freshwater Lakes - Physiological, Regional, and Global Driving Forces.
TL;DR: This work summarizes the currently published records on the invasion of two Nostocales genera, Cylindrospermopsis and Aphanizomenon, to lakes and water reservoirs in subtropical and temperate zones.
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Xerotolerant bacteria: surviving through a dry spell
TL;DR: The environmental, physiological and molecular adaptations that enable xerotolerant bacteria to survive in environments in which water is scarce are discussed and insights from modern 'omics' technologies are highlighted.
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An overview of diversity, occurrence, genetics and toxin production of bloom-forming Dolichospermum (Anabaena) species.
TL;DR: In this review, recent advances of the genus Dolichospermum are summarized, including taxonomy, genetics, bloom occurrence, and production of toxin and taste-and-odor compounds.
References
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Journal ArticleDOI
Resistance of the azotobacter cyst
M. D. Socolofsky,Orville Wyss +1 more
TL;DR: Evidence was presented indicating that the cyst is not a bacterial endospore, and the encystment process may confer a survival advantage upon the organism by coupling the low endogenous respiration rate with the ability to withstand desiccation.
Journal ArticleDOI
Effects of intracellular trehalose content on Streptomyces griseus spores
Mark J. McBride,Jerald C. Ensign +1 more
TL;DR: The increase in trehalose content coincided with increases in spore refractility, heat resistance, desiccation resistance, and the time required for spore germination in complex media.
Journal ArticleDOI
Factors regulating the recruitment of cyanobacterial and eukaryotic phytoplankton from littoral and profundal sediments
TL;DR: It is suggested that littoral sediments in temperate lakes provide inocula for most phytoplankton populations, likely due to favorable light conditions and high sediment mixing.
Journal ArticleDOI
The importance of benthic recruitment to the population development of Aphanizomenon flos-aquae and internal loading in a shallow lake
Richard P. Barbiero,Jacob Kann +1 more
Journal ArticleDOI
The fine structure of akinete formation and germination in Cylindrospermum
TL;DR: The differentiation of a vegetative cell into an akinete is characterized by cell enlargement, sheath condensation, deposition of several spore envelope layers, including a dense fibrillar layer and deposition of large cyanophycin granules.
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