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Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Sep 2010, 31 (5) BackEffect of cyanobacterial
exopolysaccharides on salt stress
alleviation and seed germination Department of Environmental Science and
Engineering, (Received: Abstract: Effect of exopolysaccharides
(EPS) produced by a consortium of cyanobacteria on
germination of three crops wheat, maize and rice was studied at different salt
concentrations. Production of EPS was found to be stimulated by salts, which in
turn had a significant Na+ removal capability from aqueous solution.
Seed germination, vigor index and mobilization efficiency in all the three
crops remarkably improved when cyanobacterial EPS was
applied. While germination improved significantly by 13 to 30%, mobilization
efficiency increased marginally by 1.03 to 1.1 times and vigor index increased
by 1.15 to 2.4 times in these crops in response to EPS under non-saline
conditions. Salinity had an inhibitory effect on seed germination of all the
species showing 18 to 54% reduction. However, in the presence of EPS, the salt
induced inhibition diminished to 13 to 18%. Inhibitory effect?? of salt on chlorophyll concentration, vigor
index and mobilization efficiency of the seedlings was much less in these crops
in the presence of EPS, indicating the latter?s role in salt stress
alleviation. Key words: Consortium, Exopolysaccharides,
Mobilization efficiency, Vigor index ??????? PDF of full length paper
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