Nitrogen fixation associated with sago (Metroxylon sagu) and some implications

Shipton, W. A., Baker, A.., Blaney, B. J., Horwood, P. F., Warner, J. M., Pelowa, D. and Greenhill, A. R. (2011) Nitrogen fixation associated with sago (Metroxylon sagu) and some implications. Letters in Applied Microbiology, 52 1: 56-61. doi:10.1111/j.1472-765X.2010.02967.x

Author Shipton, W. A.
Baker, A..
Blaney, B. J.
Horwood, P. F.
Warner, J. M.
Pelowa, D.
Greenhill, A. R.
Title Nitrogen fixation associated with sago (Metroxylon sagu) and some implications
Formatted title
Nitrogen fixation associated with sago (Metroxylon sagu) and some implications
Journal name Letters in Applied Microbiology   Check publisher's open access policy
ISSN 0266-8254
Publication date 2011-01-01
Year available 2010
Sub-type Article (original research)
DOI 10.1111/j.1472-765X.2010.02967.x
Volume 52
Issue 1
Start page 56
End page 61
Total pages 6
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Formatted abstract
Aims: To determine the presence and contribution of diazotrophic bacteria to nitrogen concentrations in edible starch derived from the sago palm (Metroxylon sagu).
Methods and Results: Isolation of diazotrophic bacteria and analysis of nitrogen fixation were conducted on pith, root and sago starch samples. Acetylene reduction showed that five of ten starch samples were fixing nitrogen. Two presumptive nitrogen-fixing bacteria from starch fixed nitrogen in pure culture and five isolates were positive for the nif H gene. Nitrogen concentrations in 51 starch samples were low (37 samples <0.2 g kg-1; 14 ranging from 0.2 to 2.0 g kg-1).
Conclusions: Nitrogen fixation occurs in sago starch, which undoubtedly plays a role in fermentation ecology. Nitrogen levels are considered too low to be of nutritional benefit and to protect against nutritional-associated illnesses.
Significance and Impact of the Study: Sago starch does not add significantly to the protein calorie intake and may be associated with susceptibility to nutritional-associated illness.
Keyword Cronobacter
Diazotrophic bacteria
Nitrogen fixation
Sago starch
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ
Additional Notes Article first published online: 30 NOV 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
National Research Centre for Environmental Toxicology Publications
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Created: Fri, 25 Mar 2011, 01:59:45 EST by Manjit Sanghera on behalf of National Res Centre For Environmental Toxicology