Li Yan-Sen, Guo Qiao-Sheng, Wang Chang-Lin, Liu Li
Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China.
Zhongguo Zhong Yao Za Zhi. 2006 Feb;31(3):197-9.
To study the seed dormancy mechanisms and the optimal seed germinating conditions, so as to provide basis for the seed testing of Changium smyrnioides.
Put the seeds into wettish sand under temperature of 25, 20, 15, 10, 5 degrees C, observe the shape changing of embryo and measure its length every other 10 days. Carry on experiments of seed germination under temperature of 25,20, 15, 10, 5 degrees C on the paper bed and sand bed, determine the time of germination starting, time of germination lasting, germination rate and germination energy.
Embryo grew the most quickly under 15 degrees C. The seed germination was largely prohibited when the temperature is higher than 20 degrees C. The mildew rate was very high under 25, 20, 15, 10 degrees C. Put the seeds under 5 degrees C for 45 days could quickly break off its dormancy, and its mildew rate was lower. The seeds germinate fastest under the condition of 15-10 degrees C on the paper bed, and its germination rate was the highest.
The morphological post-maturation seems the major dormancy mechanism of C. smyrnioides. Temperature is a major factor that affect seed germination of C. smymioides. The best pretreatment method is to put the seeds into 5 degrees C of wettish sand for 45 days. The best germination bed is the paper bed, and the best germination temperature is 15-10 degrees C.
研究明党参种子休眠机制及最佳萌发条件，为明党参种子检验提供依据。
将种子置于湿润沙子中，分别在25、20、15、10、5℃下，每隔10天观察胚形态变化并测量其长度。在25、20、15、10、5℃下于纸床和沙床进行种子发芽试验，测定发芽起始时间、发芽持续时间、发芽率和发芽势。
15℃下胚生长最快。温度高于20℃时种子萌发受到很大抑制。25、20、15、10℃下霉变率很高。将种子置于5℃下45天可迅速打破休眠，且霉变率较低。种子在纸床上15 - 10℃条件下发芽最快，发芽率最高。
形态后熟似乎是明党参种子的主要休眠机制。温度是影响明党参种子萌发的主要因素。最佳预处理方法是将种子置于5℃湿润沙子中45天。最佳发芽床是纸床，最佳发芽温度是15 - 10℃。
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