Abstract
Several experiments on the seed germination of Myrica rubra showed some new and interesting facts about its characteristics as follows : (1) The optimum temperature for the seed germination is about 15°C about four species of 'Zuiko', 'Moriguchi', 'from Chiba' and 'from Yokohama'. (2) According to the warm index, the temperature in the production area of Myrica rubra was between 15.0 and 17.5°C in average during 5 or 6 months a year. The temperature range and the periods in the area found from warm index coincided with the optimum temperature and periods from seed fructification to germination in seed germination curve our experiment in the laboratory. (3) Germination percentages of Myrica rubra decreased under dark condition, which means light germinators. (4) Germinability is maintained only for a short period (ca. a half year). (5) Seeping of the seeds into 100 ppm or 500 ppm gibberellic acid (GA3) solution could up to 70-90 %, while they showed low germination percentage (45%) without any control at 180 days.
