SECONDARY SEED DORMANCY IN COREOPSIS-LANCEOLATA
SECONDARY SEED DORMANCY IN COREOPSIS-LANCEOLATA
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DOI：
10.2307/2426610
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发表时间：
1994-01-01
影响因子：
0.6
通讯作者：
SCHEINER, SM
中科院分区：
文献类型：
--
作者：
BANOVETZ, SJ;SCHEINER, SM
我们研究了控制多年生草本植物，金鸡菊发芽的物理和生理因素。（菊科）。在室温下在纸信封中储存6至18个月的种子在皮氏培养皿中的润湿滤纸上进行发芽测试。在15和25 ℃和12小时光/暗循环下发芽率最高。吸胀种子的发芽率不受先前在-10 ℃下储存的影响。吸胀种子进行5 C进入二次休眠，不能打破随后的温暖的温度，光/暗循环或冻结温度。这项研究是我们所知道的第一个记录多年生植物次生休眠的研究。C. lanceolata可能是一种分散招募风险的机制。
We examined physical and physiological factors that control germination in the herbaceous perennial, Coreopsis lanceolata L. (Asteraceae). Seeds stored in paper envelopes for 6 to 18 months at room temperature were tested for germination on moistened filter paper in petri dishes. Germination percentages were greatest at 15 and 25 C and 12 h light/dark cycles. Germination percentages of imbibed seeds were not affected by previous storage at -10 C. Imbibed seeds subjected to 5 C entered a secondary dormancy that could not be broken by subsequent warmer temperatures, light/dark cycles or freezing temperatures. This study is the first of which we are aware documenting secondary dormancy in a perennial species. Secondary dormancy in C. lanceolata may be a mechanism for spreading the risk of recruitment.