Thumbnail Image

Dr. Y. S. Parmar University of Horticulture & Forestry, Solan

Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Solan, was established on 1st December, 1985 with the objective to promote education, research and extension education in the fields of Horticulture, Forestry and allied disciplines. Late Dr. Yashwant Singh Parmar, the first Chief Minister and the architect of Himachal Pradesh perceived the importance of Horticulture and Forestry to develop and improve the State economy which led to the establishment of this University. Its history lies in erstwhile Himachal Agricultural College, Solan, established in 1962 and affiliated to the Panjab University. It became one of the campuses of Agriculture Complex of Himachal Pradesh University on its formation in 1970. Consequent upon the establishment of Himachal Pradesh Krishi Vishvavidyalaya in 1978, this campus became its Horticulture Complex and finally in 1985, assumed the status of a State University, being the only University in the country engaged exclusively in teaching, research and extension in Horticulture and Forestry. The University is located at Nauni in Solan District of Himachal Pradesh, 13 km from Solan on Solan-Rajgarh Road, at an elevation of 1300 metres above mean sea level. Solan town is situated on national highway (NH-22) and is well connected by train and bus services. The University has four constituent colleges, out of which, two are located at the main campus Nauni, one for horticulture and the other for forestry, having 9 and 7 departments, respectively. The third College i.e., College of Horticulture & Forestry is located at Neri in Hamirpur District on Nadaun-Hamirpur state highway, about 6 Km from Hamirpur town and is well connected with bus service. The college offers three Undergraduate Degree Programmes i.e. BSc (Hons.) Horticulture, BSc (Hons.) Forestry and B. Tech. Biotechnology and MSc degree programme in a few subjects. The fourth college i.e. College of Horticulture and Forestry, Thunag (Mandi) is located at Thunag District Mandi. This college offer BSc (Hons.) Horticulture and BSc (Hons.) Forestry degree programme. In addition, there are five Regional Research Stations, 12 Satellite Stations and five Krishi Vigyan Kendras (KVKs) situated in different zones of the State.

Browse

20131
Reset filters
Subject: Home Science × End date: 2017 × Start date: 2000 × Type: Thesis × Thesis Type: M.Sc ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    STUDIES ON ISOLATION AND CHARACTERIZATION OF TRYPSIN INHIBITOR (TI) GENE FROM Dolichos biflorus L. (Kulth)
    (2013) REENA KUMARI; NATH, A.K.
    ABSTRACT Protease inhibitors are one of the most promising agents that confer resistance in plants against insect pests by inhibiting larval midgut proteases. Maximum extraction of trypsin inhibitor protein from seed flour of Dolichos biflorus L. was in 0.1 M phosphate buffer (pH 7.6) after four hours of extraction. Screening of Dolichos biflorus L. cultivars for trypsin inhibitor activity revealed maximum activity in HPK4 cultivar and further studies were conducted in this cultivar. Crude trypsin inhibitor of all cultivars inhibited midgut protease of P. brassicae larvae. Inhibitor activity was detected at early stages of seed development (3 days after flowering (DAF)) and it increased progressively with seed development (21 DAF to 60 DAF). Trypsin inhibitor activity decreased during seed germination as compared to dry seeds. Crude trypsin inhibitor extracted from developing and germinating seeds also inhibited larval midgut protease of S. littoralis. Neonate larvae of P. brassicae fed on cabbage leaf discs coated with 0.025-2.50 mg crude trypsin inhibitor caused 10–80 % larval mortality. The calculated LC50 value was 1.05 mg crude trypsin inhibitor and for 2.5 mg crude trypsin inhibitor the calculated LT50 value was 3.2 days. Leaf area eaten and faecal matter produced by treated larvae were significantly lower as compared to untreated controls. Larvae fed on leaf discs coated with 2.5 mg crude trypsin inhibitor for 5 days had significantly less total soluble protein in faecal matter and midgut trypsin activity as compared to untreated control. Significant reduction in egg hatching (75%) was observed in egg mass treated with 5.3mg of crude trypsin inhibitor of mature seeds. Trypsin inhibitor gene (309 bp) was amplified from cDNA synthesized from mature seeds of Dolichos biflorus L. HPK4 cultivar using designed primers. The amplified PCR product was cloned and sequenced. Sequence of Dolichos biflorus L. HPK4 cultivar trypsin inhibitor (DbTI) gene has been submitted to NCBI with Accession No. JQ259858. DbTI gene and its deduced amino acid sequence showed homology with Bowman-Birk inhibitors of Dolichos spp., Phaeolus spp., Vigna spp. and Glycine spp. The predicted molecular weight of deduced amino acid sequence was ~11.5 KDa and it had N terminal signal peptide of 19 amino acid residues. The secondary structure of deduced amino acid sequence of DbTI showed dominance of coils and sheets over alpha helix. Homology modelling was employed to predict the three dimensional structure of DbTI. Docking of trypsin enzyme and DbTI showed the inhibitor to be of non- competitive type.