Effects of Storage and Greenhouse Treatments on Growth and Flowering of Asian Cloriosa

摘要

The influence of planting stock, storage temperature, and of greenhouse temperature on sprouting of tubers, shoot emergence, and flowering time of two Asian populations of Gloriosa superba L. was investigated. Effects of the temperature during the first weeks and the last four weeks ("preparation") of dry storage as well as of greenhouse temperature could clearly be shown. If a temperature of 10 deg C during the first weeks of storage was followed by high temperatures of 24 deg C or 32 deg C during preparation, the dormancy of the tubers was broken. Prolongation of storage at 10 deg C and temperatures of 24 deg C or 32 deg C during preparation improved sprouting of tubers and shoot emergence after planting and decreased the number of days to flowering. The 32 deg C treatment gave the best results. If 32 deg C was applied in preparation a greenhouse-temperature of 22 deg C as compared to 17 deg C did not decrease the number of days to flowering. After storage and preparation at 10 deg C, sprouting and time of flowering showed the poorest results. Significant differences between origins have been found regarding shoot emergence and flowering time. Possible effects of temperature treatments in storage, preparation and cultivation of Gloriosa are discussed in comparison to effects of temperature treatments on Sandersonia, Gladiolus, Freesia, and Sparaxis.