Qu Luping, Wang Xiping, Chen Ying, Scalzo Richard, Widrlechner Mark P, Davis Jeanine M, Hancock James F
Gaia Herbs, Inc., 108 Island Ford Road, Brevard, NC 28712.
HortScience. 2005 Oct;40(6):1843-1845.
Seed germination patterns were studied in E. purpurea (L.) Moench grouped by seed source, one group of seven lots from commercially cultivated populations and a second group of nine lots regenerated from ex situ conserved wild populations. Germination tests were conducted in a growth chamber in light (40 μmol·m(-2)·s(-1)) or darkness at 25 °C for 20 days after soaking the seeds in water for 10 minutes. Except for two seed lots from wild populations, better germination was observed for commercially cultivated populations in light (90% mean among seed lots, ranging from 82% to 95%) and in darkness (88% mean among seed lots, ranging from 82% to 97%) than for wild populations in light (56% mean among seed lots, ranging from 9% to 92%) or in darkness (37% mean among seed lots, ranging from 4% to 78%). No germination difference was measured between treatments in light and darkness in the commercially cultivated populations, but significant differences were noted for treatments among wild populations. These results suggest that repeated cycles of sowing seeds during cultivation without treatments for dormancy release resulted in reduced seed dormancy in E. purpurea.
按照种子来源对紫锥菊（E. purpurea (L.) Moench）的种子萌发模式进行了研究，一组七批种子来自商业种植群体，另一组九批种子是从异地保存的野生群体中再生而来。将种子在水中浸泡10分钟后，在光照（40 μmol·m(-2)·s(-1)）或黑暗条件下、25℃的生长室中进行20天的萌发试验。除了两批来自野生群体的种子外，商业种植群体的种子在光照下（种子批次平均发芽率为90%，范围为82%至95%）和黑暗中（种子批次平均发芽率为88%，范围为82%至97%）的萌发情况均优于野生群体在光照下（种子批次平均发芽率为56%，范围为9%至92%）或黑暗中（种子批次平均发芽率为37%，范围为4%至78%）的萌发情况。商业种植群体的种子在光照和黑暗处理下未测得萌发差异，但野生群体的处理之间存在显著差异。这些结果表明，在种植过程中重复播种种子而不进行解除休眠的处理导致紫锥菊种子休眠减少。
