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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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201721
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Subject: Agricultural Microbiology × End date: 2017 × Start date: 2017 × Type: Thesis ×
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Now showing 1 - 9 of 21
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    ThesisItemOpen Access
    PHOSPHORUS UPTAKE AND GROWTH OF LEUCAENA LEUCOCEPHALA AND SESBANIA GRANDIFLORA AS INFLUENCED BY APPLICATION OF ACIDULATED AND BIO-ACTIVATED ROCK PHOSPHATE AND INOCULATION OF SOIL WITH GLOMUS AGGREGATUM
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-12-27) MAHESH, NAIKWAD; Manjunath, A.
    A greenhouse study was conducted to determine the influence of application of North Carolina Rock Phosphate (NCRP) formulations and inoculation of soil with Glomus aggregatum on phosphorus nutrition and growth of Leucaena and Sesbania. This investigation consisted of 24 treatments arising from a factorial combination of two plant species, two levels of Glomus aggregatum and six types of phosphorus applications. Based on titrable acidity data the acidification potential of Penicillium sp. was found to be higher than that of Bacillus sp. Application of different formulations of phosphorus significantly increased the extent of root colonization by Glomus aggregatum in Leucaena where as in Sesbania application of acidulated and bio-activated NCRP reduced the extent of colonization by Glomus aggregatum. The inoculation of soil with Glomus aggregatum caused significant increase in total phosphorus uptake in both plants, in total biomass of Leucaena and in root weight of Sesbania. The colonization in roots of plants by Glomus aggregatum significantly enhanced phosphorus uptake efficiency. The results of this investigation indicate that NCRP bio-activated with Penicillium sp could serve as a source of phosphorus to plants and inoculation of soil with Glomus aggregatum enhances the effectiveness of bio-activated NCRP.
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    ThesisItemOpen Access
    Molecular characterization of Gluconacetobacter diazotrophicus isolated from different field crops and its interactive effect with microbial consortia on growth and yield of Maize (Zea mays L.) and Finger millet (Eleusine coracana L.)
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-12-02) SANTOSHA GOWDA, G. B.; EARANNA, N.
    The Gluconacetobacter species are known to fix large amount of nitrogen without the formation of nodules in monocot plants particularly in sugarcane. This led to recognition of its importance in agriculture. In the present study, four Gluconacetobacters were isolated from Finger millet (R-01), Maize (MZ-01), Sorghum (SO-01) and Sugarcane (SU-01). The four isolates produced brown pigments on PDA and GYC media and orange pigment on LGI-P medium. Besides, they also produced IAA, solubilized P and Zn. These isolates were identified as Gluconacetobacter diazotrophicus by 16S rRNA gene sequence and screened for their efficiency on increasing growth and yield of maize and finger millet under glass house conditions. The isolate of maize (MZ-01) and its consortium consisting of G. diazotrophicus MZ-01 + B. megaterium + G. fasciculatum was found more efficient in enhancing the growth and yield. Therefore, the G. diazotrophicus MZ-01 and its consortia with 50 % recommended dose of fertilizers were selected for field studies. In the field experiment also the consortium of G. diazotrophicus MZ-01 + B. megaterium + G. fasciculatum + 50 % RDF NP found on par with 100 % RDF NP. Further, microbial population including beneficial microbes increased as the age of the plants increased and found maximum at flowering stage in both pot as well as field experiments. Thus, the G. diazotrophicus MZ-01 found superior bacterial inoculant for field crops and could save 50 % nitrogen and phosphorus fertilizers.
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    ThesisItemOpen Access
    MOLECULAR CHARACTERIZATION OF ANTIVIRAL MUSHROOMS FROM THE WESTERN GHATS OF KARNATAKA
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-11-27) MANOJ, R.; EARANNA, N.
    Mushrooms are not only known for their nutritional properties but also for the antiviral properties. Wild mushrooms (20) were collected from the Western Ghats of Karnataka, identified and screened for antiviral properties in the present study. Edible mushrooms (4) were also collected for screening against two animal viruses. Among these mushrooms, one was identified as Ganoderma lucidum based on its phenotypic characters and the other nineteen mushrooms were identified by ITS region sequence using National Centre for Biotechnology Information (NCBI) GenBank as Lentinus sp. (WGM-2), Pycnoporous sanguineus (WGM-03), Leucocoprinus birnbaumii (WGM-04), Trametes versicolor (WGM-05), Pleurotus djamor (WGM-06), Auricularia sp.(WGM- 07), Termitomyces sp. (WGM-08), Laccaria vinaceoavellanea (WGM-09) Pluteus sp. (WGM- 10), Gymnopilus lepidotus (WGM-11), Leucocoprinus cepistipes (WGM-12), Leucoagaricus cf. majusculus (WGM-13), Microporus vernicipes (WGM-14) , Polyporales sp. (WGM-15), Agaricales sp. (WGM-16), Trametes elegans (WGM-17 ), Pluteus cervinus (WGM-18), Micromphale foetidum (WGM-19) and Pluteus chryzaegis (WGM-20). Aqueous extracts of twenty wild mushrooms and four cultivated mushrooms were screened against two animal viruses viz., Bovine Herpes Virus -1 (DNA virus) and Peste des petits ruminants (PPR) virus (RNA virus). Among 24 mushrooms, only 4 mushrooms viz., Lentinus sp. (WGM-02), Pycnoporous sanguineus (WGM-03), Leucocoprinus birnbaumii (WGM-04) and Trametes versicolor (WGM-05) extracts showed antiviral activity against both the viruses. Ganoderma lucidium (WGM-01) inhibited PPR virus and not BoVH-1 virus indicating its specificity and other mushrooms did not exhibit antiviral activities.
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    ThesisItemOpen Access
    INFLUENCE OF ACIDULATION AND BIOACTIVATION OF ROCK PHOSPHATE AND INOCULATION OF SOIL WITH VAM FUNGUS ON PHOSPHORUS UPTAKE AND GROWTH OF MAIZE AND PIGEON PEA IN AN ALFISOL
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-11-11) MYTHRA, R.; Manjunath, A.
    A greenhouse investigation was conducted to determine the effect of acidulation and bioactivation of north carolina rock phosphate (NCRP) and inoculation of soil with VAM fungus on phosphorus uptake and growth of maize and pigeon pea in an alfisol. This investigation consisted of 24 treatments resulting from factorial combination of two plant species, two levels of Glomus aggregatum inoculation and six levels of phosphorus amendment. Based on titrable acidity data the acidification potential of Penicillium sp. was found to be higher than that of Bacillus sp. The extent of mycorrhizal fungal colonization in roots of pigeon pea was higher than that maize. Inoculation of soil with VA mycorrhizal fungus caused significant increase in total phosphorus uptake and biomass of pigeon pea as well as maize. The extent of increase in total phosphorus uptake and biomass due to mycorrhizal inoculation in pigeon pea was most higher than that of maize. The phosphorus uptake efficiency of maize was lower than that of pigeon pea. Mycorrhizal colonization significantly reduced phosphorus utilization efficiency of both plant species. The results of this study suggest that application NCRP bio-acidulated with Bacillus sp. and Penicillium sp. increases phosphorus uptake of maize and pigeon pea and inoculation of soil with VA mycorrhizal fungus augments that effect.
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    ThesisItemOpen Access
    EVALUATION OF LIQUID FORMULATIONS OF BENEFICIAL MICROORGANISMS IN THE CULTIVATION OF GREEN HOUSE GROWN LEAFY VEGETABLES
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-10-27) GURUMURTHY, H.; SHIVAPRAKASH, M. K.
    Human had tremendous knowledge on edible plants before civilization. Traditional vegetables are valuable sources of nutrition in rural areas. The health and nutrition of expanding world population is major upcoming challenges especially in developing countries. Plant foods are sources of energy, micronutrients and nutrients essential for health, in addition to phytochemicals with health benefits including glycemic control, immuno-stimulation or antioxidant activity (Belanger et al., 2004). Green leafy vegetables were used since ancient periods as source of food as they contain many nutrients and minerals which are helpful in maintaining human health. Leafy vegetables being richest in their nutritional value hold an important place in well-balanced diet and are the cheapest of all the vegetables within the reach of poor man (Kuhnlein and Receveur, 1996).
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    ThesisItemOpen Access
    CHARACTERIZATION AND EVALUATION OF RHIZOBIUM ISOLATED FROM ROOT NODULES OF FENUGREEK (Trigonella foenum-graceum L.) AND ITS EFFECT ON GROWTH AND YIELD OF FENUGREEK
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-08-11) PREMA KUMARASWAMI, CHIKKAMATH; NAGARAJU, K
    Fenugreek (Trigonella foenum graecum L.) belonging to the family Fabaceae is one of the oldest herbs and annual plants today. It is known for its dietary protein sources and symbiotic nitrogen fixation by Rhizobium. The successful cultivation of the crop depends on availability of the nutrient and effective functioning of Rhizobium. An attempt was made to isolate an efficient root nodulating bacteria from fenugreek. Ten isolates were obtained from root nodules of fenugreek which were collected from different fenugreek growing regions around Bengaluru. The morphological and biochemical characterization of isolates revealed that all the colonies were circular, mucoid watery to translucent, Gram negative rod shaped, fast growing, acid producers. Based on nodulation efficiency test four best isolates were selected for further screening under pot culture experiment. Pot culture experiment was conducted with 17 treatments and three replications laid out in CRD design. The experiment was conducted by inoculating best selected isolates with varied levels of nitrogen according to treatments. From the pot experiment it was revealed that among the four selected isolates FSI-2 isolate found best in combination with 75 per cent nitrogen and 100 per cent P and K for all the studied parameters. In order to reduce the use of inorganic fertilizers and to obtain higher yields there is need for inoculating fenugreek with effective strain of Rhizobium which improves symbiotic nitrogen fixation.
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    ThesisItemOpen Access
    MICROBIAL PROCESSING OF PAPAYA FRUIT FOR THE DEVELOPMENT OF FERMENTED READY TO EAT GEL
    (UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU, 2017-08-03) ZEBA RUKSAR, G P; NARAYANASWAMY, B.
    Papaya (Carica papaya L.) is a popular, inexpensive fruit species in the genus Carica of the plant family Caricaceae. It is one of the most important horticultural crops which gained consumer acceptance. India is world’s largest producer of this fruit. It is called by many names in different languages like Papita in Hindi, Omakai in Malayalam, Papatali in Tamil etc. Just like coconut, papaya tree is considered as “Kalpa Vruksha” because, various parts of the tree are used either for human consumption, for animals or as raw materials for several agro-based industries. It was first cultivated in Mexico, several centuries before the emergence of the classical civilizations. Papaya is a tropical fruit that is becoming important internationally both as fresh and processed products (Sankat and Maharaj, 1997).
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    ThesisItemOpen Access
    STUDIES ON PGPRs OF CHRYSANTHEMUM (Dendranthema grandiflora Tzvelev.) RHIZOSPHERE AND THEIR SYNERGETIC EFFECT
    (University Agricultural sciences,GKVk, Bangalore, 2017-07-29) PRAVEEN, RANADEV; NAGARAJU, K.
    The study was conducted to isolate, characterize and screen efficient PGPR isolates from different chrysanthemum growing areas of Anekal taluk. A total of forty rhizosphere soil samples of chrysanthemum crop were collected from different areas of the Anekal taluk, Bengaluru urban district, Karnataka. The collected rhizosphere soil samples of chrysanthemum were used for isolation of free living nitrogen fixing bacteria and phosphorus solubilizing bacteria (PSB). Twenty seven free living nitrogen fixers and seventeen phosphate solubilizing bacterial isolates were isolated and identified using various morphological and biochemical tests. The identified genera are Azotobacter, Bacillus and Pseudomonas. Among these isolates one efficient isolate from the free living N2 fixers i.e PGPR-24 (Azotobacter sp.) and one from phosphate solubilizers i.e PGPR-9 (Bacillus sp.) were selected based on qualitative and quantitative screening for pot experiment. The effect of selected isolates (PGPR-24 and PGPR-9) and reference strains of Azotobacter chroococcum and Bacillus megaterium were tested in single and dual inoculation with nine treatments. The growth traits like plant height, number of leaves, number of lateral branches, number of shoots and flowering, quality, yield traits and also nitrogen, phosphorous content of the plants were found highest in the treatment involving 75 % NP + Azotobacter isolate (PGPR-24) + Bacillus isolate (PGPR-9), further fresh weight, dry weight and enzymatic activity were also increased in this treatment.
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    ThesisItemOpen Access
    DIVERSITY OF CULTURABLE ENDOSYMBIONTS IN DIAMONDBACK MOTH (Plutella xylostella)
    (2017-07-26) VIJAYAKUMAR, WAGHMARE; MUTHURAJU, R.
    Diamondback moth, Plutella xylostella is a major pest of cruciferous crops worldwide and it has developed resistance to almost all synthetic and microbial insecticides. Diamondback moth was known to harbour microorganisms which play important role in growth and development of the host. In the present study bacterial strains were isolated from third instar larvae of P. xylostella collected from three different locations of the state Karnataka. Morphological characters of all isolated bacterial strains were studied. Biochemical characters including catalase and IMVIC reactions were done. Total bacterial genomic DNA was extracted from third instar larvae and amplified using PCR with 16S rRNA primers. Twenty different bacterial strains were identified in total. The partial 16S rRNA sequences from P. xylostella revealed the presence of Serratia spp. which were more predominant in Sugatur, Kolar population, Bacillus and Enterococcus spp. in Rattihalli, Haveri population and Proteus spp. in Malligere, Shivamogga population. The 16S rRNA sequence results also revealed the microflora varied from three different locations across the Karnataka. These Studies suggested that a combination of molecular and traditional culturing methods can be effectively used to analyze and to determine the diversity of gut microflora. These bacterial strains may play important roles in growth and development of P. xylostella.