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University of Agricultural Sciences, Bengaluru

University of Agricultural Sciences Bangalore, a premier institution of agricultural education and research in the country, began as a small agricultural research farm in 1899 on 30 acres of land donated by Her Excellency Maharani Kempa Nanjammanni Vani Vilasa Sannidhiyavaru, the Regent of Mysore and appointed Dr. Lehmann, German Scientist to initiate research on soil crop response with a Laboratory in the Directorate of Agriculture. Later under the initiative of the Dewan of Mysore Sir M. Vishweshwaraiah, the Mysore Agriculture Residential School was established in 1913 at Hebbal which offered Licentiate in Agriculture and later offered a diploma programme in agriculture during 1920. The School was upgraded to Agriculture Collegein 1946 which offered four year degree programs in Agriculture. The Government of Mysore headed by Sri. S. Nijalingappa, the then Chief Minister, established the University of Agricultural Sciences on the pattern of Land Grant College system of USA and the University of Agricultural Sciences Act No. 22 was passed in Legislative Assembly in 1963. Dr. Zakir Hussain, the Vice President of India inaugurated the University on 21st August 1964.

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2001 - 2009218
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Subject: Agricultural Microbiology × End date: 2009 × Start date: 2001 ×
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Now showing 1 - 9 of 218
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    ThesisItemOpen Access
    EFFECT OF RHIZOBACTERIA ON NODTTLATION AND NITROGEN FIXATION IN HCRSEGRAM (Macrotyloma uniflorutn L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-02-20) PONNANNA, N.M.; JAYASHEELA, N.
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    ThesisItemOpen Access
    Role of Phosphate Soiubilizing Microorganisms on the Success and Development of Grafted Mango Plants
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-04-04) BHUVANESHWARI, G. V.; Raj, Dr. J.
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    ThesisItemOpen Access
    EFFECT OF AGRICULTURAL PRACTICES ON NATIVE VA MYCORRHIZAL FUNGI AND MSCROBIAL BIOMASS IN SOIL
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-07-12) BALAKRISHNA, A.N.; Bagyaraj, D.J.
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    ThesisItemOpen Access
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    ThesisItemOpen Access
    ROLE OF PLANT GROWTH PROMOTING RHIZOBACTERIA ON GROWTH AND YIELD OF PIGEONPEA (Cajanus cajan L.) CULTIVARS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-08) DEVANANDA, B. J.; PATIL, A. B.
    A field experiment was conducted at Raichur on medium black soil, under rainfed conditions to study the role of plant growth promoting rhizobacteria (PGPR) on growth and yield of pigeonpea cultivars ICPL-87 (short duration) and ICPL-87119 (medium duration). The parameters like plant height, nodule number, nodule dry weight, dry matter production at different stages of crop growth, in both the varieties were most superior in the treatment receiving the triple inoculation of seeds with Rhizobium, (GB-1) Azospirillum (ACD-20) and Pseudomonas striata (strain No. 27) followed by dual inoculations, single inoculations and uninoculated control. Similarly, the yield parameters like stalk yield, seed weight per plant, 100 seed weight, number of seeds per pod and grain yield also show ed a significant increase in triple inoculation over all other treatment combinations. The same trend was observed with N-uptake, P-uptake, ureide content, bacterial population. N2-fixers and P-solubilizers. In vitro germination study indicated that treatment receiving triple inoculation showed maximum germination, seedling vigour which was significantly superior over dual and single inoculation treatments and control. Rhizobium. Azospirillwn and Pseiidoinonas sthaia strains were examined for in vitro production of lAA and GA. Maximum lAA production w as obtained in dual inoculated culture medium with Rhizobiwn and Azospirillwn (41.07 pg/ 25 ml), and was on par with triple inoculated culture. GA production was highest in triple inoculated
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    ThesisItemOpen Access
    BENEFICIAL RHIZOSPHERE MICROFLORA OF BLACK PEPPER (Piper nigrum L.) AND THEIR ROLE IN GROWTH OF THE PLANT
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-08) RANJITHA, K.; Kulkarni, Dr. J. H.
    Investigations were carried out on the native population of beneficial microrganisms in the rhizosphere of black pepper and inoculation effect of selected isolates on the rooting and growth of the plant in nursery. The riiizosphere samples were collected from Sirsi and Coorg regions in Karnataka and Kasargod district in Kerala. The study revealed a higher population of free living nitrogen fixers in rhizosphere soil, Azospirillum in endorhizosphere and percent root colonization (PRC) of vesicular ai buscular mycorrhiza (VAM) in samples collected from Coorg and Sirsi regions. But, the average number of phosphate solubilizers maintained the same level in all the major locations. Correlation studies revealed a significant association of soil orgamc carbon with population oi Azospirillum in the endorhizosphere, PRC of VAM and the free living nitrogen fixers in soil. The available nitrogen positively correlated with PRC of VAM. The significant correlation of Azospirillum with phosphate solubilizers confirmed the synergism among these microorganisms. Thirty eight isolates of Azospirillum and 31 isolates of phosphate solubilizers were obtained in this study. The nitrogen fixation efficiency of Azospirillum isolates ranged from 9.4 to 23.7 mg N^/ g malate used and the ^ phosphate solubilizing efficiency of the phosphate solubilizers varied from a Pi release of 8.1 to 19.1 mg /100ml Pikovskaya's broth.//iv/zro screening of the isolates for phytohormone synthesis indicated the varying e fficiency among the isolates and a few Azospirillum isolates as superior ones. Inoculation of pepper cuttings with Azospirillum cultures prior to planting resulted in an improved rooting percentage and better root growth compared to control. Single and dual inoculation of Azospirillum and phosphate solubilizing bacteria improved the vigour and nutrient status of the black pepper plants. The Azospirillum strains AZBR 9 and the phosphate solubilizer BRPS 16 was found to be superior in vivo.
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    ThesisItemOpen Access
    CHARACTERIZATION OF ETHYLENE DIAMINE RESISTANT MUTANTS OF Azospirillum Spp. DERIVED FROM WHEAT
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-08) SHUBHA, S.; SAVALAGI, V. P.
    Experiments were conducted to isolate native Azospirillum strains from the rhizoplane and endorhizosphere of 27 wheat genotypes and 32 Azospirillum isolates were obtained. Among these six were Azospirillum lipoferum, 13 were Azospirillum brasilense and 13 isolates could not be grouped into either of the two categories. The isolate WAS-lo was found to fix in vitro high amount of nitrogen (24.80 mgN/g of malate) and could reduce acetylene (584ri moles/mg of protein/h). All the Azospirillum isolates were checked for the different salt tolerance levels, metal resistance and resistance ro ethylenediamine. Based on above observations, the Azospirillum isolate WAS-15 with maximum resistance to ethylenediamine (0.02%) and higher acetylene reduction activity was subjected to mutation by gamma irradiation and NTG. All the mutants were characterized for colony morphology on different media and biochemical characterization, to observe any change has occurred as compared to its wild type. The observation revealed that mutant GWAS-15-3 could fix higher amount of nitrogen (50.17 mg of N/g malate) along with higher nitrogenase activity (1200 r| moles/mg protein/ h). This was followed by GWAS-15-6 which could also fix higher level of nitrogen (48.91 mg of N/g malate) along with higher nitrogenase activity (1098 r\ moles/mg protein/h). Paranodules in wheat were obtained at 0.6ppm concentration of 2,4-D and plasmid profile of the wild type were observed. Both mutants GWAS-15-3 and GWAS-15-6 possessed higher ammonia excretion than their wild type. Nitrogenase activity was not repressed in both the, mutants even in presence of 0.1 mM NH4CI.
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    ThesisItemOpen Access
    INFLUENCE OF INGCULATIGN OF EFFICIENT VAM FUNGI ON ONION (Allium cepa L.) AT DIFFERENT P-LEVELS
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-08-08) KASHAPPANAVAR, SHIVAKUMAR; SREENIVASA, M. N.
    Response of onion {Allium cepa L.) cv. N-53 to the inoculation of efficient vesicular arbuscular mycorrhizal (VAM) fungi, Acaulospora laevis and Gigaspora margarita at different P levels [0,50, 75 and 100 per cent recommended dose (PRD) (75 kg ha'^)] was studied under glass house condition. The percent mycorhizal root colonization, spore count and mycorhizal inoculation effect increased in the plants inoculated with VAM fungi with addition of P up to 75 PRD (37.5 kg ha-1), while the population of free living N2 fixers and P-solubilizers increased with addition of P upto 100 PRD of P (50 kg ha-1). Among the VAM Fungi, plants inoculated with Gigaspora magarita had significantly highest per cent mycorrhizal root colonization, spore count, mycorrhizal inoculation effect, population of free living N2 fixers and Psolubilizers in the rhizosphere soil as compared to plants inoculated with Acauiospora iaevis and uninoculated control plants. The shoot P concentration, alkaline phosphatase activity, total soluble solids, ascorbic acid content, plant height, number of leaves, plant dry weight, fresh bulb weight, bulb diameter, bulb length and neck thickness increased with increase in P level upto 100 PRD. The fresh bulb weight, plant height and plant dry matter of onion was maximum in plants inoculated with Gigaspora margarita and given 100 PRD of P. However it did not differ significantly from plants inoculated with Gigaspora margarita and given 75 PRD of P, suggesting a net saving of 25 PRD of P with efficient VAM fungi.
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    ThesisItemOpen Access
    BIOLOGICAL TREATMENT OF ORGANICALLY POLLUTED WATER FOR RECYCLING IN AGRICULTURE AND ITS EFFECT ON MICROBIOLOGICAL PROPERTIES OF SOIL
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK BANGALORE, 2001-12-08) KOSHY, BINU; VISWANATH, N.R.