| 摘要 |
PROBLEM TO BE SOLVED: To provide a germination treatment method of Viola thibaudieri, which promises a contribution to enhancement of the individual propagation or survival rate of Viola thibaudieri.SOLUTION: In a germination treatment method of Viola thibaudieri, seeds collected from Viola thibaudieri are held in a moisture retaining atmosphere substantially without nutrition, and a multistage germination treatment as one cycle is repeated in one ore more cycles until the seeds are rooted and germinated, and the roots are extended to a predetermined length. The multistage germination treatment is composed of a three-step temperature treatment consisting of (1) a high-temperature treatment for holding the seeds at a predetermined temperature in a high-temperature range of 15-25°C for 3-1 months, (2) a middle-temperature treatment for holding them at a predetermined temperature in a middle-temperature range of 5-15°C for 2.5-1.5 months, and (3) a low-temperature treatment for holding them at a predetermined temperature in a low-temperature range of 1-5°C for 4-2 months; and a temperature raising treatment. |
