假酸浆种子发芽特性研究

Seed germination characteristics of Nicandra physaloides

关键词:  假酸浆  种子发芽试验  温度  贮藏

Key words:  Nicandra physaloides  seed germination tests  temperature  storage

摘要:

在不同温度、不同贮藏时间和方法下,对来源于印度尼西亚的假酸浆种子发芽特性进行研究。结果表明:不同温度对假酸浆种子萌发的影响差异极显著,在15/25 ℃变温条件下种子发芽率最高,为84.3%,发芽快且整齐; 假酸浆种子采收后立即播种其发芽率非常低,室温下贮藏6～9个月时在25 ℃恒温或15/25 ℃变温条件下均有较高发芽率,说明假酸浆种子有休眠性,通过延长贮藏时间能打破休眠,促进种子发芽; 但室温贮藏15个月后,种子活力下降非常明显。低温冷藏在一定条件下能提高假酸浆种子萌发能力,能延长种子寿命。

Abstract:

Seed germination characteristics of Nicandra physaloides from Indonesia under different temperatures,different storage time and storage methods was investigated. The results showed that:there was significant difference in seed germination of N.physaloides under different temperatures,it had the highest germination rate(84.3%)under fluctuating temperature of 15/25 ℃,with high and uniform germination speed. The germination rate was very low when seeds were immediately sowed after collection,if the seeds were stored for 6-9 months under room temperature, the germination rate was higher under constant temperature of 25 ℃ or fluctuating temperature of 15/25 ℃,but seed vigor reduced obviously when stored for 15 months under room temperature,indicating that there was dormancy characteristic for seeds of N.physaloides. Protraction of storage time could promote seeds germination of N.physaloides. Cold storage could prolong the longevity of seeds,and it can enhance the germination ability of seeds under certain conditions.