Nostoc


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Related to Nostoc: cyanobacteria, spirulina

Nostoc

 

a genus of blue-green algae of the class Hor-mogonaceae. There are approximately 50 species, living in almost all climatic zones, in fresh waters and on damp cliffs and soil. Colonies of the algae are gelatinous and spherical, with a diameter of up to 10 cm. They resemble tapes or filaments and are free-living or sedentary. The colonies consist of single rows of filaments buried in the slime. Each filament is composed of thick-walled cells called heterocysts. The algae reproduce by spores or vegetatively, with bits of the filaments breaking off. There are some nitrogen-fixing species. Some species of Nostoc are used as food in Asian countries.

References in periodicals archive ?
The best time to gather nostoc is after a rainstorm when they are then visible on the forest floor.
Studies on the isolation of and spectral characteristics of phycobilisomes from Nostoc flagelliforme.
However, a polysaccharide from a closely related species Nostoc flagilliforme possesses anti-viral effects (Kanekiyo et al.
Osmoregulation and cell composition in salt-adaptation of Nostoc muscorum.
Nickel induced stimulation of growth, hertocyst differentiation, and C-14 uptake and nitrogenase activity in Nostoc muscorum, J.
Phylogenetic and morphological evaluation of the genera Anahaena, Aphanizomenon, Trichormus and Nostoc (Nostocales, Cyanobacteria).
Changes in aggregate stability, nutrient status, indigenous microbial populations, and seedling emergence following inoculation of soil with Nostoc muscorum.
2]) fixation: mediated by Rhizobium and Bradyrhizobium associated with legumes and Frankia, Nostoc and Azolla associated wuth non legume; (iii) the free-living nitrogen fixers, the rhizosphere nitrogen fixing Azotobacter, Azospirillum and Bacillus, free-living nitrogen fixing Cyanobacteria and Clostridium; and (iv) denitrification, the conversion of nitrate to gaseous nitrogen mediated by facultative heterotrophic bacteria.
Bioactivity in free-living and symbiotic cyanobacteria of the genus Nostoc.
2005) have found that the Nostoc cyanobiont strains are more like those in other symbioses and local free living populations of Nostoc than to each other indicating that the mycobiont acquires whatever Nostoc is available in its environment.
Nostoc (Vaucher) Bornet et Flahault genties melsvabakteres yra prokariotiniai siulinio gniuzulo tipo mikroskopiniai ir mikroskopiniai placios ekologines amplitudes organizmai.
Entre los compuestos extraidos de bacterias, hongos, invertebrados terrestres y marinos, destacan: cianovirina-N, una proteina aislada de la cianobacteria Nostoc ellipsosporum, que ha sido caracterizada como un inhibidor de la entrada/fusion del virus; la esponjotimidina, obtenida de la esponja Cryptotethia cripta, que inhibe la TR; la lamellarina [alpha]20-sulfato, un nuevo inhibidor de IN proveniente del molusco Lamellaria sp.