Bopaiah, B.M.2014-07-292014-07-291979In: Proceedings,PLACROSYM II. UPASI. Ootacamund, 26-29 Jun. 1979. Edited by C. S. Venkataram and others 89-92http://hdl.handle.net/123456789/4431The root region microflora of healthy arecanut palms were enumerated The rhizosphere samples were collected from the basin of arecanut palms of Central Plantation Crops Research Institute, Vittal The bacterial population was less, due to the acidic nature of the soil (pH 5.2-5.8). The counts of gram positive bacteria (70 80%) were more as compared to the counts of gram negative bacteria (15-30%) The bacilli group of bacteria were observed more among the gram positive bacteria. The bacteria found in the root region are Bacillus sp , Arthrobacter sp., Micrococcus sp , and Pseudomonas sp. Among the fungi, the Trichoderma spp. (18-35%) and Aspergillus spp. (21-39%) were dominating The other genera of fungi observed were Penicillium sp. Curvularia, Rhizoctonia, Rhizopus, Mucor, Fusarium, Cylindrocarpon, Cladosporium, and Alternaria. The actinomycetes were represented by Streptomyces, Nocardia, Micromonospora and Actinomyces. The population of asymbiotic N2 -fixers was comparatively less in the soil (13-105 x 10'). The phosphate soiubilizing bacteria were counted using pikovskaya's medium and the counts ranged from 47 5 -108 x 10'. Attempt to enumerate the Endogone mycorrhizae spores indicated that their relative occurrence was less. Number of actinomycetes colonies antagonistic to bacteria were also observed.enArticle