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 2010 The Authors. Letters in Applied Microbiology Copyright 2010 The Society for Applied Microbiology
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.
|Item Type:||Refereed Article|
|Keywords:||sago, nitrogen, Papua New Guinea|
|Research Division:||Environmental Sciences|
|Research Group:||Environmental biotechnology|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding knowledge|
|Objective Field:||Expanding knowledge in the biological sciences|
|UTAS Author:||Baker, AL (Dr Anthony Baker)|
|Web of Science® Times Cited:||3|
|Deposited By:||Tasmanian Institute of Agriculture|
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