PHYSIOLOGY OF DORMANCY IN TROPICAL GEOPHYTES

对热带地植物的休眠生理进行了研究。冷处理是一种常见的强迫臀乳的方法，但低温的作用尚不清楚。在25°C的温度下，在一年的时间里观察到了海马菊球茎的开花发育。低温对花蕾发育没有促进作用，但能保持花蕾健康生长，防止花蕾流产。阐明了贮藏过程中ABA含量与花发育的关系。阐明了基板在双尺度传播中的重要作用。在不将一组块茎分成两个独立块茎的情况下种植，金凤花块茎没有任何休眠，而将两个块茎分开的块茎则有休眠。果酸和吲哚-3-乙酸是发芽的主要控制因素。冷处理是延迟开花的一种做法。在本研究中，阐明了低温贮藏几乎没有优势，在理想的时间开花。收获后的球茎可以在20到25ºC的高温下储存，直到种植。内源赤霉素在冷处理期间在球茎中增加，但在冷处理后对伸长生长没有影响。

Physiology on dormancy in geophytes of tropical origin were studied.Cold treatment is a common method for forcing Hippeastrum, but the role of the low temperature is not understood. In Hippeastrum, flower but development in the bulbs grown at 25ﾟC were observed throughout a year. Low temperature did not accelerate flower development, but maintained flower buds grow healthy and preveny from aborting. Relationship between ABA fluctuation and flower development during storage was clarified. An important role of basal plate in twin-scale propagation was also clarified.Tubers of Gloriosa did not have any dormancy when planted without dividing a set of two tubers into two independent tubers, whereas those divided had a dormancy. Ascisic acid and indole-3-acetic acid were the major controlling factor for sprouting.Cold treatment to the corms of tuberose is a practice of retarded flowering. In this study, it is clarified that low temperature storage has almost no advantage for flowering at a desired time. The corms can be stored at higher temperatures as 20 to 25ﾟC after harvesting until planting. Endogenous gibberellins increased in the corms during cold treatment, but had no role on elongation growth thereafter.