Photobiology Group, Department of Biological Sciences, Simon Fraser University, Burnaby 2, British Columbia, Canada.
Plant Physiol. 1972 Dec;50(6):719-22. doi: 10.1104/pp.50.6.719.
The germination and pregermination ethylene production of Grand Rapids lettuce seeds (Lactuca sativa L.) incubated at 20 C after a red light treatment are inhibited if the seeds are first imbibed at 30 C for 36 hours. In this study, low concentrations of ethylene were found to enhance the germination of seeds pretreated at 30 C more than that of untreated controls. In the presence of high concentrations of ethylene, pretreated seeds and controls germinated at a similar rate. These results are consistent with the view that a prolonged imbibition at 30 C inhibits germination at a lower temperature through its effect on the ethylene production of the seeds. As a further test of the hypothesis, estimates were made of the pregermination ethylene content of untreated seeds and pretreated seeds incubated in the presence of sufficient ethylene to make them germinate as rapidly as untreated seeds. The values obtained were 0.65 and 0.74 nanoliter of ethylene per gram (dry weight) of seeds, respectively.
在红光处理后于 20°C 下孵育的大急流城生菜种子（Lactuca sativa L.）的发芽和预发芽乙烯生成被抑制，如果种子首先在 30°C 下吸胀 36 小时。在这项研究中，发现低浓度的乙烯增强了在 30°C 下预处理的种子的发芽，超过了未处理对照的发芽。在高浓度的乙烯存在下，预处理的种子和对照以相似的速率发芽。这些结果与以下观点一致，即在较低温度下，长时间在 30°C 下吸胀通过对种子的乙烯生成的影响来抑制发芽。作为对假设的进一步检验，对未处理的种子和在存在足以使它们与未处理的种子一样快速发芽的乙烯的情况下孵育的预处理的种子的预发芽乙烯含量进行了估计。分别获得了 0.65 和 0.74 纳升/克（种子干重）的乙烯值。
