Department of Botany, Ohio State University, Columbus, Ohio 43210.
Plant Physiol. 1973 Feb;51(2):368-71. doi: 10.1104/pp.51.2.368.
Translocation of (14)C-labeled assimilates in Early Prolific Straightneck squash (Cucurbita melopepo torticollis Bailey) through a 15-centimeter oxygen-deficient zone of the petiole was studied as a function of varying periods of anaerobiosis (N(2) atmosphere). Initiation of anaerobic conditions caused an immediate and rapid decline in translocation to about 35 to 45% of the pretreatment rate within 30 to 40 minutes. This inhibition response (first inhibition response) was transient, however, and full recovery to the pretreatment rate occurred during the ensuing 60 to 90 minutes. Following this adaptation response to anaerobic conditions, translocation continued unimpaired for extended periods of time, approaching, and in some cases exceeding, 24 hours. The second inhibition response was permanent and could not be reversed by supplying air during a subsequent 20-hour period.
通过对叶柄 15 厘米缺氧区进行（14）C 标记同化产物的转移实验，研究了早期丰产直颈南瓜（Cucurbita melopepo torticollis Bailey）在不同时间无氧条件下的转移情况（氮气环境）。厌氧条件的开始导致向预处理速率的转移立即迅速下降，在 30 到 40 分钟内降至约 35 到 45%。然而，这种抑制反应（第一抑制反应）是短暂的，在接下来的 60 到 90 分钟内完全恢复到预处理速率。在适应厌氧条件后，转移继续不受影响地进行了很长一段时间，接近并在某些情况下超过 24 小时。第二次抑制反应是永久性的，在随后的 20 小时内提供空气也无法逆转。
