Studies on the Chilling Injury in Wheat Plants : I Some researches on the mechanism of occurrence of the sterile phenomenon caused by the low temperature

[摘要] 1) The sterile phenomenom in wheat plants caused by the low temperature, that is one type of the chilling injuries, has been found almost every year at Sigarami region, Nagano prefecture. The present report deals with some researches on the sterile phenomenon in relation to the mechanism of its occurrence. 2) From the results obtained, it may be said that the sterile phenomenon is not caused by insects, mineral defficiencies and nutritional conditions of the plant, but is caused by such a meterological condition as the grass temperature is about 0∼3°C. It seems that a sensitive stage for the low temperature injury is the just before the earing and is a definite stage of the pollen development, the stage of the pollen first nuclear division. 3) The probability of the occurrence of the sterile phenomenon can be considered to be very high when the wheat plants arrived at that stage of pollen development just meet with the low temperature mentioned above.

[学科分类] 农业科学（综合）