ANABAENA & NOSTOCIn full details

Prepared by:Ezel Anne R. Benitez

Anabaena & Nostoc

Domain: Prokarya no true nucleus and no

membrane bound organelles.

Kingdom: Bacteria

Phylum: Cyanobacteria acquire energy through

photosynthesis blue-green algae.

Order: Nostocales they have trichomes and

lack endospores and exospores.

Family: Nostocaceae category of blue-green

algae that form heterocysts and have unbranched trichomes.

Nitrogen fixing

Anabaena & Nostoc

AnabaenaGenus: Anabaena Known for its intercalary

heterocysts and isolated or amorphous filaments.

AnabaenaComprehensive Description Filamentous (trichomes) May be coiled or straight With occational heterocysts Terminal cells may/ may not be

narrowed Akinetes may form Rare: trichomes may be

encased in mucilage Free floating Filaments are solitary or

clustered Cell Size: 4-50um (Akinetes>heterocyst>vegetative cell)

Sraight

Coiled

Vegetative cell

AnabaenaHabitat (based on 14 specimen)

Depth range: 0-1m

Large Temperature range: up to 74°C

Large Salinity Range

Source: Ocean Biogeographic Information System

Sraight

Coiled

Vegetative cell

AnabaenaReproduction: trichome fragmentation

(usually at heterocytes) and by akinetes.

Motility:gliding type movementPredators:Bosmina longirostris

Sraight

Coiled

NostocGenus: Nostoc contains organisms that form

spherical colonies of filaments embedded in a gelatinous substance

Nostoc

NostocComprehensive Description cylindrical, spherical or ovoid

cells Heterocysts are intercalary Size of colonies range from

microscopic to 20cm diameter

Some form a gelatinous colony

NostocHabitat:Depth: 0-0mTemperature range: adapted to extreme environments

Reproduction: by fragmentation

Nostoc flagelliforme Edible, delicacies in Asia

Nostoc

Predators:Leptodiaptomus siciloidesHolopedium gibberumDaphnia pulexDiaphanosoma leuchtenbergianum

Sources: http://bioweb.uwlax.edu/bio203/2010/towers_albe/

Classification.htm http://eol.org/pages/11687/details http://bioweb.uwlax.edu/bio203/s2008/kaisersa_jose/

Life%20and%20Interactions.html http://www.britannica.com/EBchecked/topic/420477/

Nostoc http://web2.uwindsor.ca/courses/biology/fackrell/

Microbes/11725.htm http://eol.org/pages/11781/details