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IJMS Vol.31(2) [June 2002] >


Title: Quantification of halophilic Azospirillum from mangroves
Authors: Ravikumar, S.
Ramanathan, G.
Suba, N.
Jeyaseeli, L.
Keywords: Azospirillum
indole acetic acid
mangroves
nitrogen fixation
Issue Date: Jun-2002
Publisher: CSIR
Abstract: Bacterial density of Azospirillum was found higher in the roots of Avicennia marina (148.88 x 104 g-1 dry weight) and rhizosphere sediment of Suaeda monoica (20.0 x 103 g-1 dry weight). The growth, production of indole acetic acid (IAA) and the rate of nitrogen fixation in Azospirillum brasilense were found to be maximum at pH 7.0. At 3 % NaCl, it showed better growth and production of IAA, however the rate of nitrogen fixation was slowed down at 1 % NaCl and was completely arrested at 1.5 %. The percentage of germination in coastal crop plants increased by 70 % in black gram and 45 % in rice with the inoculation of Azospirillum brasilense compared with control. The saline tolerant Azospirillum is recommended as biofertilizer for improving crop yield in coastal agricultural fields
Page(s): 157-160
ISSN: 0379-5136
Source:IJMS Vol.31(2) [June 2002]

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