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IJBT Vol.03(4) [October 2004] >


Title: Transgenic diazotrophs: Indian perspective
Authors: Jha, M N
Misra, S K
Keywords: transgenic
diazotroph
cyanobacteria
nif gene
artificial symbiosis
Issue Date: Oct-2004
Publisher: CSIR
IPC CodeInt. Cl.7 C 12 N 15/00
Abstract: One of the major objectives of direct agronomic importance is either to engineer a microbe having better nitrogen fixation rate and efficiency or to extend the symbiotic nitrogen fixation process to non-nodulated plants, especially cereals. This could be achieved either by increasing the number of nif genes or by making nitrogenase specific to only N2 molecule. Introduction of hup gene in symbiont and increasing the number of hetR gene in an asymbiont cyanobacteria may improve the nitrogen fixing potential. Search for a better nitrogen fixer would be another ideal approach to achieve the goal. A number of researchers have described the induction of ‘nodule like’ structure in cereals, systemic distribution of some diazotrophs in grasses and incorporation of cyanobacteria into higher plant protoplast or midrib air space. Such developments suggest the possibility of creating artificial symbiosis. However, at present we can say “In theory any plant–and at the moment no plant whatever! The authors briefly review this research and discuss the strategies associated with better bionitrogen availability to cereals.
Page(s): 502-510
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Source:IJBT Vol.03(4) [October 2004]

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