种翅及贮藏温度对木地肤种子萌发和寿命的影响

Effects of Seed Bract and Storage Temperature on Seed Germination and Life of Kochia prostrata Seeds

为了研究种翅和贮藏温度对木地肤(Kochia prostrata)种子萌发和种子寿命的影响,试验将收获的种子置于黑暗条件下,采用常温、冷藏(-18℃)分别贮藏3个月、6个月、9个月、12个月、15个月,然后测定种子发芽率。结果表明,贮藏15个月后,常温贮藏去翅种比有翅种发芽率高13.44%;冷藏条件去翅种发芽率比有翅种高14.67%;-18℃贮藏15个月后,冷藏去翅种比常温贮藏去翅种发芽率高45.33%;冷藏有翅种比常温贮藏有翅种发芽率高44.00%。说明种翅抑制种子萌发,冷藏木地肤种子可延缓其生理衰退,延长种子寿命。

In order to investigate the effects of seed bract and storage temperature on seed germination and life of Kochia prostrata,the germination rate of the harvested seeds stored for 3,6,9,12 and 15 months under normal temperature and low temperature(-18℃)under dark conditions.The results showed that after 15 months of storage,the germination rate of seed bract-removed seeds was 13.44%higher than that of seed bract-covered ones.The germination rate of seed bract-removed seeds was 14.67%higher than that of seed bract-covered ones under cold storage condition.After 15 months of storage at-18℃,the germination rate of seed bract-removed seeds in cold storage was 45.33%higher than that in normal storage.Additionally,The germination rate of seed bract-removed seeds under-18℃store was 44.00%higher than that of stored at room temperature.The results indicated that the seed germination of K.prostrata was inhibited by seed bract and the physiological decline was delayed and the seed life was prolonged by low temperature storage.