STUDIES ON THE ENVIRONMENTAL FLUCTUATION OF GERMINATION HABITS OF RICE SEEDS AND THE TEST AND SELECTION METHODS FOR THEM : I. On the effect of temperature during maturation on germination of rice seeds

Abstract

Considerable dormancy or delayed germination was found to be induced, when the rice seeds matured at relatively low temperature in the early stage of maturation and at high temperature (about 30°C. or more) in the latter half of that period. In contrast to this fact, the germination speed was accelerated by the high temperature 5 or 10 days after ear emergence. These facts were observed equally in three varieties differentiating each other in germination habit.