| dc.description.abstract | Tobacco plant is one of the high commercial crops that give the largest foreign exchange sources in Indonesia. It also contributes to
providing employment not only for farmers but also industrial sectors. Tobacco plant experiences growth failure due to excessive
rain, which causes waterlogging to the plants so that the plants become submerged and show hypoxia. A hypoxia tolerant variety is
needed to reduce losses in tobacco cultivation. The research was conducted in a greenhouse and biology laboratory at the
University of PGRI Argopuro Jember. This research aimed to study the post-hypoxic stress recovery ability in three previously
studied varieties of tobacco plants such as sensitive, moderate, and tolerant varieties. The results showed that the treatment of
hypoxic stress on tobacco plants significantly affected the parameters of stomatal activity, transpiration rate, and the amount of
reducing sugar. In the sensitive and moderate tobacco varieties, the greater percentage of waterlogging resulted in decreased
stomatal activity, transpiration rate, and percentage of sucrose. The tolerant tobacco varieties (Bojonegoro var.) show a tendency
to increase stomatal activity (76.203, 79.735, 86.963, and 92.227, respectively, for waterlogging 100%, 120%, 140%, and 160% field
capacity), transpiration rate (0.139, 0.124, 0.130, and 0.146, respectively, for waterlogging 100%, 120%, 140%, and 160% field
capacity), and percentage of sucrose (3.45, 3.64, 3.73, and 4.31, respectively, for waterlogging 100%, 120%, 140%, and 160% field
capacity) with a higher percentage of waterlogging. Three varieties of tobacco with tolerant, moderate, and sensitive categories to
hypoxia developed different metabolisms to cope with energy crises caused by waterlogging stress comprised of the stomatal
conductance, transpiration rate, and sucrose percentage | en_US |
