不同种源山桐子冬芽休眠的温度特性

Temperature characteristics of winter buds dormancy in ldesia polycarpa of different origins

比较了亚热带的日本冲绳县山桐子和暖温带的三重县山桐子冬芽休眠的温度特性 结果表明 ,两种源的山桐子冬芽都有冬季休眠的特性 ,只有在经历了冬季低温之后 ,冬芽才能生长 ,其生长量与所经历的低温量有关 ,1 5℃的低温也有解除休眠的效果 。

Seedlings of Okinawa origin were cultivated in Mie prefecture in Japan so that its temperature features could be compared with those of local seedlings.The results were as follows,winter buds in Idesia polycarpa of Okinawa origin were induced to winter dormancy as the same with those from Mie origin.The winter buds did not resume growth at 25℃ without undergoing enough chilling.Besides,the growth quantities were correlated with chilling periods.Moreover,the dormancy of buds of both origins could be released at 15℃.However,there were differences in the quantities of chilling requirement and the lowest limit of effective chilling temperatures to dormancy relase between the two origins.