ACETOBACTER DIAZOTROPHICUS PDF

Thank you Your Enquiry has been sent successfully. Download Brochure. Acetobacter Diazotrophicus is a nitrogen-fixing bacterium associated with sugar cane, secretes a levansucrase. Acetobacter Acetobacter Glucanoacetobacter is nitrogen fixing bio inoculant exclusively meant for sugarcane.

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James, V. Reis, F. Olivares, J. Baldani, J. Significant nitrogen fixation has recently been demonstrated in Brazilian sugar cane Saccharum officinarum cultivars known to form associations with a number of diazotrophs, including Acetobacter diazotrophicus , an acid-tolerant endophytic bacterium which grows best on a sucrose-rich medium. In a series of experiments, aseptically-grown sugar cane plantlets were rooted in a liquid medium and inoculated with A.

After 4, 7, 9, and 15 d, plants were examined under light, scanning and transmission electron microscopes and the presence of A. By 15 d, external bacterial colonization was seen on roots and lower stems, particularly at cavities in lateral root junctions. The loose cells of the root cap at root tips were a site of entry of the bacteria into root tissues.

Both at lateral root junctions and root tips, bacteria were also seen in enlarged, apparently intact, epidermal cells. After 15 d, bacteria were present in xylem vessels at the base of the stem, many connected via mucus to spiral secondary thickening. There was no obvious pathogenic reaction to the bacteria within the xylem. From these observations, it is proposed that, under experimental conditions, A. It is further suggested that the xylem vessels in the dense shoots of mature plants are also a possible site of N 2 -fixation by diazotrophs as they provide the low pO 2 and energy as sucrose necessary for nitrogenase activity.

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It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide. Sign In or Create an Account. Sign In. Advanced Search. Search Menu. Article Navigation. Close mobile search navigation Article Navigation. Volume Infection of sugar cane by the nitrogen-fixing bacterium Acetobacter diazotrophicus E. James 3. Oxford Academic. Google Scholar. Cite Cite E. Select Format Select format. Permissions Icon Permissions. Abstract Significant nitrogen fixation has recently been demonstrated in Brazilian sugar cane Saccharum officinarum cultivars known to form associations with a number of diazotrophs, including Acetobacter diazotrophicus , an acid-tolerant endophytic bacterium which grows best on a sucrose-rich medium.

Acetobacter diazotrophicus , endophyte , infection , nitrogen fixation , sugar cane. Issue Section:. You do not currently have access to this article. Download all figures. Comments 0. Add comment Close comment form modal. I agree to the terms and conditions. You must accept the terms and conditions. Add comment Cancel. Submit a comment. Comment title. You have entered an invalid code. Submit Cancel. Thank you for submitting a comment on this article. Your comment will be reviewed and published at the journal's discretion.

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Acetobacter Diazotrophicus

Acetobacter diazotrophicus was isolated from coffee plant tissues and from rhizosphere soils. Attempts to isolate this bacterial species from coffee fruit, from inside vesicular-arbuscular mycorrhizal fungi spores, or from mealybugs Planococcus citri associated with coffee plants were not successful. These N2-fixing isolates had some features in common with the genus Acetobacter but should not be assigned to the species Acetobacter diazotrophicus because they differed from A. Thus, some of the diazotrophic acetobacteria recovered from the rhizosphere of coffee plants may be regarded as N2-fixing species of the genus Acetobacter other than A.

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Gluconacetobacter diazotrophicus is a bacterium with a rod-like shape, has circular ends, and can be classified as a Gram-negative bacterium. Cavalcante and Johanna Dobereiner. Originally found in Alagoas, Brazil, Gluconacetobacter diazotrophicus is a bacterium that has several interesting features and aspects which are important to note. Cavalcante and Johanna Dobereiner while analyzing sugarcane in Brazil.

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