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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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Subject: Plant Biochemistry × Author: JAYA, JOSHI × Start date: 1961 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    BIOCHEMICAL STUDIES ON THE DEVELOPMENT OF CORKY TISSUE IN SAPOTA (Manilkara achras (Mill.) Fosberg)
    (University of Agricultural Sciences, Bangalore, 2009-07-15) JAYA, JOSHI; Shivashankar, S.
    Corky tissue (CT) of sapota is a physiological disorder characterized by hard lump in the pulp, slightly desiccated in nature and acidic to taste. This disorder shows no distinct external symptoms and becomes visible only w hen fruit is cut open. Under extremely severe conditions, corkyskin eruptions are seen. Corky tissue incidence is estimated to vary from 2 0 to 5 0 percent in Cricket Ball, while in other varieties like Kalipati it is up to 5 percent. Biochemical analysis reveals that total and reducing sugars, soluble protein and activities of amylase and lipase were higher in the me socarp of healthy fruits compared to CT affected fruits, while content of starch and free am in of acids were lower. These indicated that degradation of starch into sugars wash ampered in CT affected fruits. Starch content, soluble protein and free amino acid were higher in health y seed s than seeds from CT affected fruits, while total and reducing sugars and amylase activity were lower. Under field conditions, regulation of sink strength by exogenous application of GA3 and PBZ showed that, CT occurred in the weaker sink thus confirming the role of inter fruit competition in CT development. Seed viability seems to play an important role in CT development. Sink strength of fruit depends upon number of viable seeds it has. Moisture content in seed and mesocarp of healthy fruits washigher in comparison with that of CT affected fruits, showing there by that seed from CT affected fruits had lost moisture leading to reduction in seed viability. Reduction in seed viability in corky tissue affected fruit was confirmed by data on germination, dehydrogenase activity, DNA content and analysis of endogenous levels of GA3 , ABA and JA using HPLC . Conditions of increased temperature, evaporative dem and and decreased relative humidity showed marked in crease in cork y tissue incidence.