Agricultural Environmental Quality Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705.
Plant Physiol. 1973 Nov;52(5):475-9. doi: 10.1104/pp.52.5.475.
Promotion of germination by red light fails after prolonged dark imbibition of Rumex crispus L. seeds, indicative of a secondary dormancy. The degree and rate of inception of the dormancy increases with increasing temperature. Following establishment of the dormancy, germination response to red light can be restored by either prolonged cold treatment or brief high temperature shifts. Loss of phytochrome was not a factor in the initial establishment of the dormancy. When the seeds are in secondary dormancy, the chromophore of phytochrome can be transformed to the far red-absorbing form, but the far red-absorbing form cannot induce germination. The responses to changes in temperature suggested dependence of germination on order left arrow over right arrow disorder transitions in components of the seeds.
经过长时间的黑暗吸胀后，酸模种子的萌发被红光促进作用所抑制，这表明存在次生休眠。休眠的程度和起始速率随温度的升高而增加。休眠建立后，通过延长低温处理或短暂的高温转换可以恢复对红光的萌发反应。初始休眠建立时，光敏色素的丧失不是一个因素。当种子处于次生休眠时，光敏色素的发色团可以转化为远红光吸收形式，但远红光吸收形式不能诱导萌发。对温度变化的反应表明，萌发依赖于种子成分中左箭头超过右箭头的无序跃迁。
