Christiansen M N
Crops Research Division, Agricultural Research Service, U.S. Department of Agriculture, Plant Industry Station, Beltsville, Maryland 20705.
Plant Physiol. 1967 Mar;42(3):431-3. doi: 10.1104/pp.42.3.431.
Cotton seedlings were subjected to a 96 hour chilling treatment (5 degrees or 10 degrees ) after periods of germination at 31 degrees ranging from 0 to 48 hours. Inhibition of subsequent growth at a favorable temperature by chilling was dependent on level of low temperature and stage of seedling development when chilled. Two periods of chilling hypersensitivity were observed during germination: 1) coincident with subjection of seed to a germination environment; and 2) after 18 to 30 hours of germination at 31 degrees . Subsequent growth of seedlings chilled after 12 to 18 hours or 48 hours of germination at 31 degrees was relatively unaffected. It is suggested that chilling alters specifically timed events that occur at the initiation of germination and after 18 to 30 hours of germination, and that alteration of these germination processes is visited on long term subsequent growth of the plant.
棉花种子在31℃下萌发0至48小时后，进行96小时的低温处理（5℃或10℃）。低温对后续适宜温度下生长的抑制作用取决于低温水平以及低温处理时幼苗的发育阶段。在萌发过程中观察到两个低温敏感时期：1）与种子进入萌发环境同时；2）在31℃下萌发18至30小时后。在31℃下萌发12至18小时或48小时后进行低温处理的幼苗，其后续生长相对未受影响。研究表明，低温会改变萌发开始时以及萌发18至30小时后特定时间发生的事件，并且这些萌发过程的改变会影响植株随后的长期生长。
