Use of nitrogen-fixing bacteria as biofertiliser for non-legumes: prospects and challenges

Title 
Use of nitrogen-fixing bacteria as biofertiliser for non-legumes: prospects and challenges 
Publication Type 
Journal Article 
Authors 
Bhattacharjee RB, Singh A, Mukhopadhyay SN 
Year of Publication 
2008 
Publisher 
Springer-Verlag 
Volume 
80 
Journal 
Applied Microbiology and Biotechnology 
Issue 
Pagination 
199 - 209 
Date Published 
8/2008 
ISSN 
1432-0614 
URL 
http://www.ncbi.nlm.nih.gov/pubmed/18600321; http://link.springer.com/article/10.1007%2Fs00253-008-1567-2 
Keywords 
Beans, Biological nitrogen fixation, BNF, Cassava, Chickpea, Cowpea, Endophyte, Groundnut, Growth promotion, Maize, NF bacteria, nitrogen-fixing bacteria, Non-legume, Rhizobium, Rice, Sorghum, Wheat 
DOI 
10.1007/s00253-008-1567-2 
Abstract 

The potential of nitrogen-fixing (NF) bacteria to form a symbiotic relationship with leguminous plants and fix atmospheric nitrogen has been exploited in the field to meet the nitrogen requirement of the latter. This phenomenon provides an alternative to the use of the nitrogenous fertiliser whose excessive and imbalanced use over the decades has contributed to green house emission (N2O) and underground water leaching. Recently, it was observed that non-leguminous plants like rice, sugarcane, wheat and maize form an extended niche for various species of NF bacteria. These bacteria thrive within the plant, successfully colonizing roots, stems and leaves. During the association, the invading bacteria benefit the acquired host with a marked increase in plant growth, vigor and yield. With increasing population, the demand of non-leguminous plant products is growing. In this regard, the richness of NF flora within non-leguminous plants and extent of their interaction with the host definitely shows a ray of hope in developing an ecofriendly alternative to the nitrogenous fertilisers. In this review, we have discussed the association of NF bacteria with various non-leguminous plants emphasizing on their potential to promote host plant growth and yield. In addition, plant growth-promoting traits observed in these NF bacteria and their mode of interaction with the host plant have been described briefly.
 

 
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