Record ID No. |
909 |
Author(s) |
Bhattacharya P. M., Saha J., Chaudhuri S. , 2007 |
Affiliation |
Department of Plant Pathology, Uttar Banga Krishi Viswavidyalaya, Pundibari 736 165, India. |
Title |
Change of population dynamics of rhizobacteria in bamboo on mycorrhization |
Source. Vol.(no):Page |
Environment and Ecology. 25(1): 82-85p. |
Categories |
Mycorrhiza General |
Subjects |
Biological Interaction |
Sub-subjects |
Plant growth promoting rhizo bacteria |
Host |
Bambuseae, Dendrocalamus strictus |
Organism |
Rhizobacteria, Pseudomonas, Azotobacter, Azospirillum |
Country |
India, Asia |
Abstracts |
A preliminary study on the association of growth-promoting rhizobacteria in bamboo (Dendrocalamus strictus) rhizosphere was conducted to assess the population levels of different types of bacteria and their change in population under mycorrhiza inoculation. Results showed the presence of a rather large population of aerobic microaerophilic N2 fixers and fluorescent pseudomonas in bamboo rhizosphere and root association. Population counts in root association were predictably higher in root association than rhizosphere soil in both cases. Population counts of all components of bacteria of mycorrhiza-inoculated plants in laterite soil was higher than uninoculated plants in the same soil. Through repeated single colony isolations and observations of colony morphology, the root associated isolates were separated and purified as distinct isolates of the presumptive nitrogen fixers and fluorescent pseudomonads. There were 10 distinct aerobic diazotrophs including the Azotobacter and two isolates of Azospirillum in root association from the two soil sources. Population diversity of aerobic diazotrophs was more in alluvial soil than laterite soil. There were one and three isolates of fluorescent pseudomonads in root association in the two soil sources, respectively. These isolates were put to standard morphological and biochemical tests for identification. |