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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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20211
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Subject: Plant Pathology × Author: Kaman, Pranjal Kumar × End date: 2021 × Start date: 2021 × Type: Thesis ×
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    ThesisItemOpen Access
    SYNTHESIS OF NANOPARTICLE FROM BIORESOURCES FOR MANAGEMENT OF BLAST DISEASES OF RICE
    (2021) Kaman, Pranjal Kumar; Bhattacharyya, Ashok
    Development of reliable and eco-friendly process for synthesis of metallic nanoparticle is an important steps in the field of nanotechnology. An effort was made for biosynthesis of gold nanoparticles from bioresources like microbes Aspergillus niger, Metarhizium anisopliae, Lecanicillium lecannii, Purpeurocillium lilacinus and botanicals like Ocimum gratissimum, Acorus calamus, Aloe barbadensis and Azadirachta indica. Chloroauric acid was added as precursor for the synthesis of gold nanoparticles. Study on in vitro efficacy of biosynthesized gold nanoparticle from bioresources was tested at hundred percent concentration against Magnaporthe grisea and effective source was found to be Metarhizium anisopliae and Ocimum gratissimum. Further efficacy of biosynthesized gold nanoparticle from Metarhizium anisopliae and Ocimum gratissimum. was tested against Magnaporthe grisea at three different concentrations (50, 100 and 150ppm) comparison was made with Tryclozole @ 600 ppm. The result showed that the gold nanoparticles at 150 ppm significantly inhibit the mycelia growth of the pathogens as compared to the Tryclozole @ 600 ppm. The effective biosynthesized gold nanoparticles was characterized by UV-Vis spectrophotometer, Dynamic Light Scattering (DLS), Fourier transform infrared spectrometer (FTIR), Zeta Sizer and Transmission Electron Microscope (TEM). Formation of gold nanoparticles were confirmed by UV-VIS spectroscopy study with absorption peaks at 550 nm. FTIR study showed that synthesized gold nanoparticle has all the required functional groups like OH, N-H, C-H and COO-. Study on surface properties of nanoparticles by using zetasizer resulted that gold nanoparticle from Metarhizium anisopliae was found to be negative and were stable in nature with zeta potential value of -20.7 mV. DLS analysis showed that the average size of the biosynthesized gold nanoparticles is 32.54 nm with polydispersity index of 0.560. TEM study showed that shape of the biosynthesized nanoparticle is from triangular to quasihedral and the size range from 9-54nm. Again, a pot experiment was conducted for studying its effect on morphophysiology as well as soil physico chemical and biological properties by different methods of application like seedling dip treatment, foliar spray and soil application. A positive effect was found on the morphology, soil physico chemical and biological properties when rice seedling was treated as seedling dip treatmen + foliar spray + Soil application @ 150ppm.