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Home / Cyanobacteria / Colonies / Nostoc / Images or return to: |
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Home / Cyanobacteria / Filaments / Unbranched / Untapered / Heterocysts / Visible Sheath / Nostoc |
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Nostoc (Cyanophyceae) |
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Nostoc
sp. from Goose Pond, NH USA |
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Nostoc
sp. from Goose Pond, NH USA Colony of trichomes embedded in mucopolysaccharide sheath, from
an autumn bloom on Goose Pond, Canaan NH. Image by James F. Haney, University
of New Hampshire, Durham, NH USA. |
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Nostoc
sp. colonies ("balls") viewed by a tadpole. |
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Nostoc
sp. Colony of trichomes embedded in mucopolysaccharide sheath, from
an autumn bloom on Goose Pond, Canaan NH. Image by James F. Haney, University
of New Hampshire, Durham, NH USA . |
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Nostoc
sp. Colony of trichomes embedded in mucopolysaccharide sheath, from
an autumn bloom on Goose Pond, Canaan NH. Image by James F. Haney, University
of New Hampshire, Durham, NH USA . |
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Nostoc pruniforme colonies floating after forming gas vesicles and becoming buoyant. Note 'milky' yellow to green appearance. Photograph by Bregieta (Brea) Arvidson 2017. |
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Nostoc
sp. floating on surface of Pyramid Lake near Paradox, NY USA. Colonies are
filled with gas vacuoles giving them a milky-green appearance. Photograph by
Sue Pierce posted online.
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Nostoc
cf. pruniforme. |
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Nostoc sp. cf. pruniforme Bright green Nostoc cf. pruniforme colonies,
probably ~ 1 cm diameter, rich in chlorophyll a. Sold as food. Posted online.
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Nostoc
sp. cf. pruniforme Orange colonies of Nostoc cf. pruniforme with dominance of carotenoids. Commercially
sold as a food -- Image by Perubiotech . |
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Nostoc cf pruniforme
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Nostoc
cf pruniforme. from a stone-covered
private drive in the United Kingdom |
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Nostoc
pruniforme colonies (1 – 2 cm) in
their natural setting at Goose Pond, Maine (lat
43.561, lon -70.863), 28 Sep 2014. Underwater photograph by Dennis Roberge,
Shapleigh ME USA . |
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Nostoc pruniforme colonies (1 – 2 cm) in
their natural setting at Goose Pond, Maine (lat
43.561, lon -70.863). Underwater photograph by Dennis Roberge,
Shapleigh ME USA, 28 Sep 2014
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Nostoc pruniforme colonies (1 – 2 cm) in
their natural setting at Goose Pond, Maine (lat
43.561, lon -70.863). Underwater photograph by Dennis Roberge,
Shapleigh ME USA, 28 Sep 2014
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Nostoc pruniforme
colonies (1 – 2 cm) in their natural setting at
Goose Pond, Maine |
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Large
Nostoc pruniforme colony ~3 cm diameter |
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Nostoc
pruniforme
- largest Nostoc colony on record
(22 cm diam., 2.6 kg wet wt) almost bowling ball
size! Dodds, W.K., D.A. Gudder
and D. Mollenhauer 1995. The ecology of Nostoc. Journal of Phycology 31:2-18.
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Nostoc cf. pruniforme
spherical colony, from a lake in New Hampshire, USA |
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Nostoc cf. pruniforme
spherical colonies, from a lake in New Hampshire, USA |
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Nostoc pruniforme at an early stage of colony formation
(several colonies), following formation of relatively amorphous
semi-filaments in photograph above. Similar
source and history. Photograph by
Matthew Larson, University of New Hampshire
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Nostoc cf. pruniforme lacking peripheral border and
releasing trichomes, from a lake in New Hampshire, USA
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Nostoc
as symbiont of the host Blasia pusilla, a liverwort.
Nostoc chamber in the
liverwort supports growth of Nostoc and penetrates the colony with clear
cells in the form a a branching tree with a single
trunk, thus providing a large surface area undoubtedly for absorbing
photosynthate. Sketch by Coker (1903).
Coker, W.C. 1903.
Selected Notes. II. Liverworts.
Botanical Gazette 36(3):225-230. |
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Nostoc life cycle, both free-living and
endobiotic, not all species use all parts of the cycle. Paulsrud, P. 2001. The Nostoc symbiont of lichens. Diversity, specificity and cellular modifications. PhD Dissertation, Faculty of Science and Technology, Acta Universitatis Upsaliensis, Uppsala. (online) |
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Nostoc
pruniforme trichomes (no sheath yet) recently
escaped (two days ago) from colonies placed in a 38 L aquarium, formed a
thin-layer association visible in patches on the water surface
(neuston). Individual heterocysts were also
in the surface layer. Apparently the trichomes ejected their
intercalary heterocysts, thereby forming two trichomes
by fractionation, and then formed terminal heterocysts,
some visible in photograph. Colonies were collected at Goose Pond,
Shapleigh ME USA, 4 Oct. 2014 |
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Nostoc trichomes extracted from the inside of
the outer 'cover' of a Nostoc pruniforme colony that have formed terminal heterocysts and have no intercalary heterocysts.
The colony was collected at Goose Pond, Shapleigh ME USA, 4 Oct. 2014.
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Nostoc
pruniforme from Goose
Pond, Shapleigh ME USA illustrating 'islands' of trichomes attached to the
outer 'skin' of a colony (~ x40).
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Trichomes and free heterocysts
recently liberated from a Nostoc pruniforme colony and fractured on either side of
the previously intercalaray heterocysts.
Collected at Goose Pond, Shapleigh ME USA.
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Trichomes
liberated from a
Nostoc pruniforme colony that have formed terminal heterocysts. Collected at Goose Pond, Shapleigh ME
USA. |
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Terminal
heterocyst on a trichome inside the sheath of a Nostoc pruniforme colony. Apparently half of the cells have broken off the
opposite side of the previously intercalary heterocyst. Collected at
Goose Pond, Shapleigh ME USA.
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Unknown 'volcanic outcropping' attached
to a fraction of sheath from a Nostoc
pruniforme colony
collected in Goose Pond, Shapleigh ME USA
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Fractured sheath from a
Nostoc pruniforme colony from
Goose Pond, ME USA. When disrupted the
sheath fractures in elongated strips
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Strips from a fractured Nostoc
pruniforme colony
sheath, collected in the benthos of Goose Pond, Shapleigh Maine, USA
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Nostoc commune
in a damp terrestrial habitat |
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Nostoc
zetterstedtii Mollenhauer, D., R. Bengtsson, E-A Lindstrom and M. Oslash 2000. Macroscopic cyanobacteria of the genus Nostoc: a neglected and endangered constituent of European inland aquatic biodiversity. European Journal of Phycology 34:349-360. |
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Nostoc
pruniforme stage in
life cycle following escape of trichomes from filament, with amorphous pseudofilament formation including extracellular gel
deposition, prior to forming a spherical gell
colony. Collected from the benthos
(depth ~1.2 m) of Goose Pone, Shapleigh, ME USA in October 2014, kept in a 75
L aquarium next to an east facing lab window, photographed in December 2014.
Photograph by Matt Larson, University of New Hampshire
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Nostoc cf. pruniforme
released trichomes, from a lake in New Hampshire, USA |
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Nostoc
cf. pruniforme released trichomes, from a lake in New
Hampshire, USA
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Nostoc fuscescens
Fritsch 1912 Seaburg, K.G.,
B.C. Parker, G.W. Prescott & L.A. Whitford 1979
The algae of Southern Victoria land, Antarctica. Bibl Lichenol, Vol
46, J Cramer, Vaduz
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Nostoc
piscinale
Kuetzing 1843 Seaburg, K.G.,
B.C. Parker, G.W. Prescott & L.A. Whitford 1979
The algae of Southern Victoria land, Antarctica. Bibl Lichenol, Vol
46, J Cramer, Vaduz
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Nostoc commune
Vauch. ex B. & F. Zaneveld,
J.S. 1988. The cyanophyta of the Ross Sea Islands and
coastal Victoria Land, Antarctica. Koeltz Scientific Books, Koenigstein.
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Nostoc sp. Broady, P.A. 1979.
A preliminary survey of the terrestrial algae of the Antarctic
Peninsula and South Georgia. Br Antarct Surv Bull 48: 47-70
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Nostoc punctiforme
Modified
from sketch by Broady (1979) from the collection of Manfred Bölter, University of Kiel, DE Broady, P.A. 1979.
A preliminary survey of the terrestrial algae of the Antarctic
Peninsula and South Georgia. Br Antarct Surv Bull 48: 47-70. |
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Nostoc microscopicum
Carmichael in Hook 1833. Modified
from sketch by Seaburg et al
(1979) from the collection of Manfred Bölter,
University of Kiel, DE Seaburg, K.G., B.C. Parker, G.W. Prescott & L.A.
Whitford 1979 The algae of Southern Victoria land,
Antarctica. Bibl Lichenol, Vol 46, J Cramer, Vaduz
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Nostoc muscorum. Modified
from sketch by Pankow et al. (1991) from the collection of Manfred Bölter, University of Kiel, DE
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Nostoc commune. Modified from sketch by Zaneveld (1988) from the collection of Manfred Bölter, University of Kiel, DE Zaneveld, J.S. 1988. The cyanophyta of the Ross Sea Islands and coastal Victoria Land, Antarctica. Koeltz Scientific Books, Koenigstein.
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