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dc.contributor.authorDormgoole, F. I.
dc.contributor.authorSilvester, Warwick B.
dc.contributor.authorHicks, Brendan J.
dc.date.accessioned2008-12-11T02:23:12Z
dc.date.available2008-12-11T02:23:12Z
dc.date.issued1978
dc.identifier.citationDormgoole, F.I., Silvester, W.B. & Hicks, B. J. (1978). Nitrogenase activity associated with codium species from New Zealand marine habitats. New Zealand Journal of Marine and Freshwater Research 12, 17-22.en_US
dc.identifier.urihttps://hdl.handle.net/10289/1581
dc.description.abstractNitrogenase activity, measured as acetylene reduction, was recorded at rates up to 1028 nmol.h \g * dry weight for Codium adhaerens (Cabr.) Ag. var. convolutum Dellow and Codium fragile (Sur.) Hariot subsp. tomentosoides (Van Goor) Silva collected from New Zealand habitats. In both species the ability to reduce acetylene is invariably associated with the presence of a heterocystous blue-green alga, Calothrix sp., epiphytic or embedded in the Codium thallus. A highly significant (P < 0.001) correlation between heterocyst frequency and nitrogenase activity was found. Nitrogenase and net photosynthesis of the Codium-Calothrix system have different steady-state responses to light intensity, and the kinetics of the two processes also differ in that nitrogenase is slow to respond to illumination or darkening. Glucose additions to Codium did not significantly increase nitrogenase activity. Nitrogenase is relatively insensitive to oxygen tension over the range 0-1.0 atm (0-1.033 kgf.cnT2) and still occurs at 1.5 atm (1.55 kgf.cm"2); this condition is unique in all nitrogenase systems thus far reported. Collectively these facts suggest that Calothrix is the agent primarily responsible for nitrogenase activity in these Codium species.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherR S N Z Publishingen_NZ
dc.relation.urihttp://www.royalsociety.org.nz/Site/publish/Journals/nzjmfr/1978/2.aspxen_US
dc.rightsCopyright New Zealand Journal of Marine and Freshwater Research 1978. Used with permission.en_US
dc.subjectbiologyen_US
dc.subjectcodiumen_US
dc.subjectcalothrixen_US
dc.titleNitrogenase activity associated with codium species from New Zealand marine habitatsen_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1080/00288330.1978.9515718en_NZ
dc.relation.isPartOfNew Zealand Journal of Marine and Freshwater Researchen_NZ
pubs.begin-page17en_NZ
pubs.elements-id33052
pubs.end-page22en_NZ
pubs.issue1en_NZ
pubs.volume12en_NZ


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