|
NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR) >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.31 [2002] >
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]
|
|
