Zhawar, Vikramjit KaurGupta, Himani2019-12-142019-12-142019http://krishikosh.egranth.ac.in/handle/1/5810137711Work of relating tuber dormancy with low temperature sweetening (LTS)-resistance and tuber antioxidant content was done in eleven potato cultivars varying in LTS-resistance during cold storage. This work showed that dormancy can be positively related to LTS-resistance where LTS resistance could involve sucrose/starch metabolism oriented more towards anabolism than catabolism, thus beneficial for both dormancy and LTS-resistance. This was seen the best in Lady Rosetta followed by Kufri Frysona and MP/04 578. However vacuolar invertase activity was positively related to hexogenesis in LTS-susceptible cultivars only as LTSresistant cultivars also increased activity of this enzyme upon cold storage, thus enzyme may also be playing other important role during tuber storage. Lady Rosetta was found more dormant at room temperature as well as under cold storage but MP/04 578 and Kufri Frysona were less dormant at room temperature but became more dormant during cold storage. For antioxidant content, Lady Rosetta was found to increase antioxidant content specially catalase with increasing pace of ROS specially H2O2 but other cultivars were poor in this response, thus end up with increasing oxidative toxicity during cold storage. Tubers of Lady Rosetta were found more uniform for size, dormancy related parameters and less effected by seasonal environmental changes during crop growth and storage compared to other cultivars which showed wide variations. This study showed that tuber dormancy can be positively related to LTS-resistance and antioxidant content.ennullThesis