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


Shipton, WA and Baker, AL and Blaney, BJ and Horwood, PF and Warner, JM and Pelowa, D and Greenhill, AR, Nitrogen fixation associated with sago (Metroxylon sagu) and some implications, Letters in Applied Microbiology, 52, (1) pp. 56-61. ISSN 0266-8254 (2010) [Refereed Article]

Copyright Statement

Copyright 2010 The Authors. Letters in Applied Microbiology Copyright 2010 The Society for Applied Microbiology

DOI: doi:10.1111/j.1472-765X.2010.02967.x


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 <02 g kg−1; 14 ranging from 02 to 20 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.

Item Details

Item Type:Refereed Article
Keywords:sago, nitrogen, Papua New Guinea
Research Division:Environmental Sciences
Research Group:Environmental biotechnology
Research Field:Biodiscovery
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Baker, AL (Dr Anthony Baker)
ID Code:99306
Year Published:2010
Web of Science® Times Cited:3
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-03-19
Last Modified:2015-05-25

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