Abstract
1. The flower-bud initiation of tobacco plant (N. Tabacum Var. Virginica) was obviously accelerated under low temperature condition (approximately 10°C∼20°C). 2. Whereas, the period from initiation of flower bud to opening of flower was shortened when grown under high temperature condition. 3. The critical temperature for acceleration and delay of flower-bud initiation is observed approximately at 20°C. 4. The malnutrition induead by lack of fertitizer, seemed to delay the flower-bud initiation when grown under high temperature condition, while the effect was perfectly prevailed over by applying the favorable low temperature.
