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不同处理方法对独脚金种子萌发的影响

Effect of Different Treatments on Seed Germination of Striga asiatica

  • 摘要: 以独脚金种子为材料,探讨预处理时间、温度、光照、植物生长调节剂、低温层积、贮藏时间等不同处理方式对其休眠与萌发特性的影响。结果表明,独脚金种子萌发不需要光照,最佳萌发温度为30℃,预处理时间为13 d时萌发率最高;独脚金种子存在生理休眠现象,GR 24可有效打破其休眠,萌发率显著高于GA、6 KT、ABA和TZ处理(p<0.05);贮藏80~180 d的独脚金种子萌发率均可高达80%以上,贮藏时间太短(10 d)或太长(365 d)其萌发率均较低,表明独脚金休眠是一个动态变化的过程;低温会导致独脚金种子进入次生休眠,表现出休眠循环现象。

     

    Abstract: The effects of different treatments such as pretreatment time, temperature, light, plant growth regulator, low temperature stratification and storage time on dormancy and germination characteristics of Striga asiatica seeds were investigated. The results showed that there was no need for light for seed germination, and the optimum germination temperature was 30 ℃ and the pretreatment time for 13 days, of which the germination rate was the highest. There existed a physiological dormancy for Striga asiatica. GR 24 could effectively break the dormancy, and the germination rate was significantly higher than that treated with GA, 6 KT, ABA and TZ(p<0.05). The germination rate of Striga asiatica seeds stored for 80 to 180 days was higher than 80%. The germination rate of Striga asiatica seeds stored for too short time(10 days) or too long time(365 days) was lower, indicating that Striga asiatica seed dormancy was a dynamic process. Low temperature could lead to secondary dormancy and dormancy cycle.

     

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