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ThesisItem Open Access Screening of tea cultivars grown in Kumaon region for their total phenolics, pigments and individual catechin contents(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2005-08) Pandey, Sudhanshu; Mishra, D.P.Total chlorophylls, chlorophyll a , chlorophyll b, total carotenoids and total phenolics contents and HPLC profiling of various catechins and quantitative estimation of (-)EGCG,(-)EC and (-)ECG were carried out in fresh tea leaf leaves (dried immediately after sampling), of 6 varieties grown in Kumaon region and a black orthodox tea sample processed locally. The main objective of the study was to screen these varieties for their catechin contents and other flavanoid constituents. Dried leaf powder was used to estimate chlorophylls, carotenoids and total phenols. For catechins, dried leaf powder was first extracted with aqueous methanol. This extract was subjected to separation of catechins on HPLC and identification and quantitative estimation were done using standard catechins. Contents of various parameters were variable among varieties and there was no set pattern. Kangra Jat had highest content of chlorophyll a, and total carotenoids while chlorophyll b, total chlorophyll and total phenols were highest in UPAS1-9. T-78 exhibited lowest content of all these parameters. Black orthodox tea had pretty high content of chlorophylls and carotenoids but its phenolics content was lowest, perhaps due to oxidation of phenolics during processing. The HPLC profiles gave eight peaks, out of which first two peak, were probably of some non-catechin compounds, hence ignored. Out of remaining 6 peaks, 3 were of (-)EGCG,(-)EC and (-)ECG. Other three were named as U1, U2 and U3.Out of them U1 was supported to be (-)EGC. By comparison of peak areas,retention times etc., quantitative estimation of (-)EGCG, (-)EC and (-)EC was performed, which revealed these three catechins comprised nearly 0.11-0.14% of dried solids (110-140 mg g-1) and (-)EGCG was nearly (69-82 mg g-1),half of all catechins estimated. On the basis of increasing catechin contents, order of varieties was: Black Orthodox tea(commercial)ThesisItem Open Access Biochemical evaluation of genotypes of Jatropha curcas L., and optimization of micropropagation schedule(G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2005-07) Munagapati, Sandhya; Gaur, A.K.Five genotypes of Jatropha curcas viz. shu03001, shu03002, shu03004, shu04001 and shu04004 were selected for their further identification and biochemical characterization. Identification of genotypes had been done on the basis of banding pattern on SDS-PAGE of total seed storage protein and its fractions viz. globulins and albumins. Based on the Jaccard‟s similarity coefficient obtained from the banding patterns of SDS-PAGE, the five genotypes are grouped into two categories. Group1 consisting of shu03001, shu03004 and shu04004 and Group2 consisting of shu03002 and shu04001. These results were based in accordance with the percentage protein content of the respective genotypes taken for study and the oil contents of these genotypes were almost comparable. However, the lipid/protein ratio was highest in shu04001. In view of optimizing micropropagation schedule, the experiments were also conducted on three genotypes of J.curcas viz. shu03001, shu03002 and shu03004 to study the effect of various parameters viz. genotypes, growth regulators and explants and their interactions on callus induction frequency. Two explants viz., leaf and petiole from all the three genotypes were placed on different combinations of growth regulators. Calluses were induced from the two explants on all types of callus induction media containing four levels of 2,4-D (1, 2, 2.5and 3mg/l) with BAP (0.1,0.2,0.25 and 0.3mg/l) and two levels of NAA (1 and 2 mg/l) with two levels of BAP (0.1 and 0.2 mg/l). Maximum callus induction frequency of 92.8, 93.1; 97.4, 98.7 and 88.8, 96.1% was observed for leaf and petiole explants of shu03001, shu03002 and shu03004 genotypes respectively. In a generalized way, it was observed that shu03004 genotype showed highest callus induction frequency followed by shu03002 and shu03001. Media with NAA (1mg/l) and BAP (0.1mg/l) showed highest callus induction frequency with both leaf and petiole explants in all the three genotypes. Amongst explants, petiole showed higher callus induction frequency followed by leaf explant on all types of callus induction media.