{"id":863,"date":"2021-05-21T13:08:19","date_gmt":"2021-05-21T17:08:19","guid":{"rendered":"http:\/\/www.montclair.edu\/water-science\/?page_id=863"},"modified":"2021-06-09T15:17:21","modified_gmt":"2021-06-09T19:17:21","slug":"anabaena","status":"publish","type":"page","link":"https:\/\/www.montclair.edu\/water-science\/freshwater-cyanobacteria-of-new-jersey\/visual-guide-to-cyanobacteria-in-new-jersey\/filamentous\/heterocyte-forming\/anabaena\/","title":{"rendered":"Anabaena"},"content":{"rendered":"

Taxonomy<\/h2>\n
\n
Order<\/dt>\n
Nostocales<\/dd>\n
Family<\/dt>\n
Nostocaceae<\/dd>\n
Genus<\/dt>\n
Anabaena<\/em><\/dd>\n<\/dl>\n

Examples of Anabaena<\/em><\/h2>\n
\n
\"anabaena<\/a><\/figure>\n

400X total magnification; 10 \u03bcm scale bar.<\/p><\/div>\n

\n
\"anabaena<\/a><\/figure>\n

400X total magnification; 10 \u03bcm scale bar.<\/p><\/div><\/p><\/div>\n

Morphology<\/h2>\n

Filaments solitary or joined into clusters, amorphous mats, or in the tissues of aquatic plants; usually entangled and irregularly situated, but sometimes roughly parallel. Sheaths are diffuse, colorless mucilaginous envelopes; never firm. Trichomes usually flexuous to irregularly coiled, sometimes more or less straight; isopolar; sometimes narrowing slightly towards the ends; constricted at the crosswalls; uniseriate. Cells spherical, cylindrical, or barrel-shaped; sometimes with granular content; always without aerotopes<\/strong>; pale to bright blue-green to yellow-green.<\/p>\n

Trichomes metameric. Heterocytes solitary, intercalary; spherical, oval, or cylindrical in shape; rarely more than 9 per filament. Akinetes develop paraheterocytically, directly adjacent to heterocytes on either side or distant from heterocytes; usually cylindrical or oval, but rarely spherical; intercalary; solitary or in rows of up to 5; epispore smooth or textured, colorless or yellowish-brown.<\/p>\n

Ecology<\/h2>\n

Mostly benthic; mat-forming in littoral zone, or on sediments or aquatic plants; in freshwater pools, ponds, or saline lakes.<\/p>\n

Note that planktic species with aerotopes, though once classified as Anabaena<\/em>, have been reclassified<\/strong>; many belong to the genus Dolichospermum<\/em> (some have been further reclassified; the genus Sphaerospermopsis<\/em> was separated from Dolichospermum<\/em>).<\/p>\n

References<\/h2>\n
    \n
  • Johansen, J. R., & Kom\u00e1rek, J. (2015). Filamentous Cyanobacteria. In J. D. Wehr, R. G. Sheath, & J. P. Kociolek (Eds.), Freshwater Algae of North America: Ecology and Classification<\/em> (2nd ed., pp. 183-218). Waltham, MA: Elsevier.<\/li>\n
  • Kom\u00e1rek, J. (2013). Cyanoprokaryota-3. Teil\/Part 3: Heterocytous Genera (J. R. Johansen, Ed.). In B. B\u00fcdel, G. G\u00e4rtner, L. Krienitz, & M. Schagerl (Eds.), S\u00fc\u00dfwasserflora von Mitteleuropa<\/em> (Vol. 19\/3, pp. 790-792). Heidelberg, Germany: Springer Spektrum.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

    Taxonomy Order Nostocales Family Nostocaceae Genus Anabaena Examples of Anabaena Morphology Filaments solitary or joined into clusters, amorphous mats, or in the tissues of aquatic plants; usually entangled and irregularly situated, but sometimes roughly parallel. Sheaths are diffuse, colorless mucilaginous envelopes; never firm. Trichomes usually flexuous to irregularly coiled, sometimes more or less straight; isopolar; […]<\/p>\n","protected":false},"author":34,"featured_media":611,"parent":827,"menu_order":9,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inline_featured_image":false,"footnotes":""},"class_list":["post-863","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/pages\/863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/users\/34"}],"replies":[{"embeddable":true,"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/comments?post=863"}],"version-history":[{"count":5,"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/pages\/863\/revisions"}],"predecessor-version":[{"id":1014,"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/pages\/863\/revisions\/1014"}],"up":[{"embeddable":true,"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/pages\/827"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/media\/611"}],"wp:attachment":[{"href":"https:\/\/www.montclair.edu\/water-science\/wp-json\/wp\/v2\/media?parent=863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}