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ThesisItem Open Access APPLICATION METHODS OF VA MYCORRHIZAL INOCULUM FOR CROPS IMPORTANT IN AGRICULTURE, HORTICULTURE AND FORESTRY(University of Agricultural Sciences, Dharwad, 1999) G, MAMATHA; BAGYARAJ, D JABSTRACT NOT AVAILABLEThesisItem Open Access STUDIES ON Azospirillum ISOLATES OF ORNAMENTAL PLANTS AND THEIR EFFECT ON Gaillardia pulchella var picta Fouger(University of Agricultural Sciences, Dharwad, 1999) GADAGI, RAVI; KULKARNI, J HInvestigations were carried out on the isolation, identification, genetic diversity, screening of Azospirillum and their inoculation effect on the growth and flowering of Gaillardia. Attempts were made to improve the nitrogen-fixing efficiency of Azospirillum through mutagenesis. From the present investigation, it can be concluded that Azospirillum is common inhabitant of roots of ornamental plants. From the 88 isolations made, 55 percent of isolate were Azospirillum lipoferum while Azospirillum brasilense represented 41.57 percent. The nitrogen fixation by Azospirillum isolates in the semi-solid medium ranged from 1.40 (OAD-36 and OAD-72) to 20.54 (OAD-2) mg gi of malate. Further, ability- to fix dinitrogen was also confirmed by acetylene reduction assay. Although all the Azospirillum isolates could produce variable quantity of IAA and GA, Strain OAD-57 produced the highest plant growth-promoting substances. Genetic diversity of Azospirillum isolates was analyzed through intrinsic antibiotic resistance, protein and plasmid profile. The isolates showed wide diversity with respect to intrinsic antibiotic resistance. However, using the protein finger printing the two definite groups of Azospirillum could discerned. All the isolates contained only one plasmid (22 kb). Seven efficient isolates were selected for further field study, based on preliminary screening of all the isolates under pot culture. From the field experiment, it can be concluded that OAD-2 can play an important role in the N-nutrition of Gaillardia pulchella. Further 25 AziR and EDAR mutants were obtained through NTG mutagenesis. TShese mutants had higher nitrogenase activity and in vitro N fixed g-1 malate. The AziR OAD-904 and EDAR OAD-209 performed better than their respective wild type, in pot cultures in augmenting plant growth and N-uptake of Gaillardia pulchella.ThesisItem Open Access MINERAL PHOSPHATE SOLUBILIZATION BY BACTERIA AND THE ROLE OF PYRROLO QUINOLINE QUINONE (PQQ)(University of Agricultural Science, Dharwad, 1998) Dinesh Kumar, T K; Siddrame Gowda, T KABSTRACT NOT AVAILABLEThesisItem Open Access INFLUENCE OF VA MYCORRHIZAL FUNGI, AND NITROGEN FIXING AND MYCORRHIZATION HELPER BACTERIA ON GROWTH OF NEEM (Azadirachta indica A. Juss.)(University of Agricultural Science, Dharwad, 1998) Sumana, D A; Bagyaraj, D JABSTRACT NOT AVAILABLEThesisItem Open Access EFFECT OF PAPER MILL EFFLUENT IRRIGATION ON SOME CHEMICAL AND MICROBIOLOGICAL PROPERTIES OF SOIL(University of Agricultural Science, Dharwad, 1997) Vishwanth, N R; Bagyaraj, D JABSTRACT NOT AVAILABLEThesisItem Open Access THE ROLE OF ASSOCIATIVE CYANOBACTERIA IN NITROGEN FIXATION BY Azolla spp.(University of Agricultural Science, Dharwad, 1995) Tilak, Minakshisundaram; Shivappa Shetty, KABSTRACT NOT AVAILABLEThesisItem Open Access AKINETE DIFFERENTIATION AND CYANOBACTERIAL INOCULUM PRODUCTION(University of Agricultural Science, Dharwad, 1997) Shivaprakash, M K; Shivappa Shetty, KABSTRACT NOT AVAILABLEThesisItem Open Access SELECTION OF EFFICIENT VA MYCORRHIZA FOR INOCULATING CARDAMOM NURSERIES(University of Agricultural Science, Dharwad, 1996) Sreeramulu, K R; Bagyaraj, D JABSTRACT NOT AVAILABLEThesisItem Open Access SELECTION OF EFFICIENT VESICULAR ARBUSCULAR MYCORRHIZAL FUNGI FOR INOCULATING Acacia holosericea .Albizzia lebbeck and Tectona grandis(University of Agricultural Science, Dharwad, 1996) Kanagavel Rajan, S; Bagyaraj, D JABSTRACT NOT AVAILABLE