Department of Plant and Soil Science and Department of Botany, University of Vermont, Burlington, Vermont 05401.
Plant Physiol. 1972 Aug;50(2):262-5. doi: 10.1104/pp.50.2.262.
Short day enhancement of cold acclimation in twigs of Cornus (red-osier dogwood), Weigela, and Pyracantha (firethorn) was studied using dark interruptions with red or with red-far red radiation. Hardiness was estimated by freezing stem tissues to preselected temperatures and evaluating injury electrolytically. Dark-period interruptions with red radiation suppressed cold acclimation in Cornus and Weigela. When red light was followed by far red light, suppression was relieved. No radiation control of acclimation was found with Pyracantha. The short day enhancement of cold acclimation in Cornus and Weigela appears to be phytochrome-mediated.
使用红光或红-远红光辐射进行黑暗中断处理,研究了Cornus(红瑞木)、Weigela 和 Pyracantha(火棘)嫩枝的短日促进冷驯化。通过将茎组织冷冻到预选温度并用电解评估损伤来估计耐寒性。红光黑暗期中断抑制了 Cornus 和 Weigela 的冷驯化。当红光后紧接着远红光时,抑制作用得到缓解。Pyracantha 未发现辐射对驯化的控制作用。Cornus 和 Weigela 的短日促进冷驯化似乎是由光敏色素介导的。