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Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina
Nitrogen fixation was associated with the rinsed roots and rhizomes of the seagrass, Zostera marina L. Nitrogenase activity (acetylene reduction) was greater on rhizomes compared to roots, and on older roots and rhizomes relative to younger tissue. Compared to aerobic assays, anaerobic or microaerob...
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1982
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| Online Zugang: | https://ncbi.nlm.nih.gov/pmc/articles/PMC1065938/ https://ncbi.nlm.nih.gov/pubmed/16662727 |
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pubmed-10659382005-03-20 Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina Capone, Douglas G. Budin, John M. Plant Physiol Articles Nitrogen fixation was associated with the rinsed roots and rhizomes of the seagrass, Zostera marina L. Nitrogenase activity (acetylene reduction) was greater on rhizomes compared to roots, and on older roots and rhizomes relative to younger tissue. Compared to aerobic assays, anaerobic or microaerobic conditions enhanced the rate of acetylene reduction by rhizomes with attached roots, with the highest activity (100 nanomoles per gram dry weight per hour) occurring at pO(2) = 0.01 atmosphere. Addition of glucose, sucrose, or succinate also increased the rate of acetylene reduction under anaerobic conditions, with glucose providing the most stimulation. In one experiment, comparison of acetylene reduction assays with (15)N(2) incorporation yielded a ratio of about 2.6:1. Seagrass communities are thought to be limited by the availability of nitrogen and, therefore, nitrogenase activity directly associated with their roots and rhizomes suggests the possibility of a N(2)-fixing flora which may subsidize their nutritional demand for nitrogen. 1982-12 /pmc/articles/PMC1065938/ /pubmed/16662727 Text en |
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US National Library of Medicine |
| collection |
PubMed Central |
| language |
English |
| format |
Article |
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Articles |
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Articles Capone, Douglas G. Budin, John M. Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina |
| description |
Nitrogen fixation was associated with the rinsed roots and rhizomes of the seagrass, Zostera marina L. Nitrogenase activity (acetylene reduction) was greater on rhizomes compared to roots, and on older roots and rhizomes relative to younger tissue. Compared to aerobic assays, anaerobic or microaerobic conditions enhanced the rate of acetylene reduction by rhizomes with attached roots, with the highest activity (100 nanomoles per gram dry weight per hour) occurring at pO(2) = 0.01 atmosphere. Addition of glucose, sucrose, or succinate also increased the rate of acetylene reduction under anaerobic conditions, with glucose providing the most stimulation. In one experiment, comparison of acetylene reduction assays with (15)N(2) incorporation yielded a ratio of about 2.6:1. Seagrass communities are thought to be limited by the availability of nitrogen and, therefore, nitrogenase activity directly associated with their roots and rhizomes suggests the possibility of a N(2)-fixing flora which may subsidize their nutritional demand for nitrogen. |
| author |
Capone, Douglas G. Budin, John M. |
| author_facet |
Capone, Douglas G. Budin, John M. |
| author_sort |
Capone, Douglas G. |
| title |
Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina |
| title_short |
Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina |
| title_full |
Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina |
| title_fullStr |
Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina |
| title_full_unstemmed |
Nitrogen Fixation Associated with Rinsed Roots and Rhizomes of the Eelgrass Zostera marina |
| title_sort |
nitrogen fixation associated with rinsed roots and rhizomes of the eelgrass zostera marina |
| publishDate |
1982 |
| url |
https://ncbi.nlm.nih.gov/pmc/articles/PMC1065938/ https://ncbi.nlm.nih.gov/pubmed/16662727 |
| _version_ |
1760263963715567616 |