Effects of Storage Condition, and Temperature and Light Condition on the Germi Tion of Seeds of a Few Wild Flower Species

27 Mar Effects of Storage Condition, and Temperature and Light Condition on the Germi Tion of Seeds of a Few Wild Flower Species

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Abstract

4種の野生草花の種子発芽について, 種子の貯蔵条件および発芽時の温度, 光条件を相互に組み合わせた実験を行った。 ヂシバリは光による発芽への影響は認められず, 3℃の低温湿潤貯蔵 (湿層処理) により, 発芽は抑制された。 ニガナは明条件または湿層処理によって発芽が促進され, 両条件が重なった時に著しく発芽率は高まった。 コウゾリナ, フランスギクは明条件または湿層処理を行うことで発芽率が高まり, 発芽適温の幅も広がった。

English Abstract

A Iaboratory test was made of the germi tion of the seeds of four wild flower species which are considered important members of the attractive grassland community.
Measurements were conducted on freshly-collected and stored seeds. Responses to storage methods (dry and wet at 3°C), temperature, and light conditions in relationship to germi tion were examined.
Ixeris stoloniferam The effect of light on germi tion was not recognized. Germi tion of seeds with stratification was inhibited, but seeds in dry storage at 3°C maintained their initial germi bility. Ixeris dentata Almost no germi tion was observed in the dark. Germi tion was accelerated by stratification or under illumi tion. Seeds showed the best germi bility when given both treatments. Picris hieracioids subsp. japonica and Chrysanthemum leucanthemum Good germi tion was observed not only in the light but also in the dark in these species. Stratification or illumi tion raised their germi bility.