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目的研究黄精种子质量和不同浓度的SNP和ETH对其萌芽的影响。方法选取籽粒饱满、无霉变及瘢痕的种子进行暗培养(25℃),每日观察并记录数据,60天后统计结果。结果黄精种子质量差异对发芽率、初生根长及萌发过程所形成的球状结构大小均能产生影响,其中以球状结构大小影响最大;在试验浓度范围内,500 mg·L-1SNP处理24h效果最好,发芽率、发芽势、发芽指数、活力指数分别为60%、51.7%、0.39和2.34,300 mg·L-1ETH处理种子24h效果最好,发芽率、发芽势、发芽指数、活力指数分别为78.9%、50%、0.78和6.16。结论绿皮种子不易萌发,易发霉,生产中宜选取种皮亮黄色的黄精种子进行种植培育;NO和乙烯确有打破种子休眠促进种子萌发的作用,而乙烯对促进黄精种子萌发效果更明显。
Objective To study the effects of the seeds of Polygonatum sibiricum and the different concentrations of SNP and ETH on their germination. Methods Seeds with full grain, no mildew and scars were selected for dark culture (25 ℃). The data were observed and recorded daily and the results were statistically analyzed after 60 days. Results The germination rate, primary root length and the size of spherical structure formed during germination could all be influenced by the difference of the quality of the seeds. Among them, the spherical structure size had the greatest effect on the germination rate. Within the experimental concentration range, the effect of 500 mg · L- The germination rate, germination potential, germination index and vigor index were 60%, 51.7%, 0.39 and 2.34, 300 mg · L -1 ETH, respectively. The seed germination rate, germination vigor, germination index and vigor index were the best 78.9%, 50%, 0.78 and 6.16. Conclusion It is not easy for green seed to germinate and moldy. Yellow yellow seed of seed coat should be selected to be cultivated in production. NO and ethylene indeed have the effect of breaking seed dormancy to promote seed germination, while ethylene has more obvious effect on promoting germination of yellow seed.