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Title: Quantification of halophilic <i style="">Azospirillum </i>from mangroves
Authors: Ravikumar, S.
Ramanathan, G.
Suba, N.
Jeyaseeli, L.
Keywords: <i style="">Azospirillum</i>
indole acetic acid
nitrogen fixation
Issue Date: Jun-2002
Publisher: CSIR
Abstract: Bacterial<b style=""> </b>density of <i style="">Azospirillum</i> was found higher in the roots of <i style="">Avicennia marina</i> (148.88<sub> </sub>x<sub> </sub>10<sup>4</sup> g<sup>-1</sup> dry weight) and rhizosphere sediment of <i style="">Suaeda<b style=""> </b>monoica</i> (20.0<sub> </sub>x<sub> </sub>10<sup>3 </sup>g<sup>-1</sup> dry weight). The growth, production of indole acetic acid (IAA) and the rate of nitrogen fixation in <i style="">Azospirillum brasilense </i>were found to be maximum at <i>p</i>H 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 <i style="">Azospirillum brasilense<b style=""> </b></i>compared with control<b style=""><i style="">. </i></b>The saline tolerant <i style="">Azospirillum</i> is recommended as biofertilizer for improving crop yield in coastal agricultural fields
Description: 157-160
ISSN: 0379-5136
Appears in Collections:IJMS Vol.31(2) [June 2002]

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