突发生长：一种由生长素介导的反应。
Emergent growth: an auxin-mediated response.
机构信息
Section of Genetics, Development and Physiology, Division of Biological Sciences, Cornell University, Ithaca, New York 14853.
出版信息
Plant Physiol. 1977 Apr;59(4):745-9. doi: 10.1104/pp.59.4.745.
Restoration of oxygenated conditions following 15 minutes to 2 hours of anoxia causes light-grown pea (Pisum sativum L. var. Alaska) stem segments to elongate 100 to 200% more than continuously aerated segments. This "emergent growth" response takes place in the presence of 5 mm F(-), an inhibitor of anaerobic respiration; therefore, a build-up of glycolytic products does not appear to be the mechanism underlying emergent growth. "Acid growth" does not appear to account directly for the hyperelongation, as extracellular pH does not drop following a return to aerobic conditions. Studies with (14)C-indoleacetic acid indicate that auxin is freed from some previously unavailable pool during O(2)-limited treatments. We suggest, therefore, that emergent growth is a response to auxin which is released during anaerobiosis: the newly mobile or diffusible auxin promoting growth when O(2) is no longer limiting.
缺氧 15 分钟至 2 小时后恢复充氧条件，会导致光生长的豌豆（Pisum sativum L. var. Alaska）茎段比持续通气的茎段伸长 100%至 200%。这种“突发生长”反应发生在存在 5mm F（-）的情况下，F（-）是无氧呼吸的抑制剂；因此，糖酵解产物的积累似乎不是突发生长的机制。“酸性生长”似乎不能直接解释超伸长，因为细胞外 pH 在回到有氧条件后不会下降。用（14）C-吲哚乙酸进行的研究表明，生长素从某些以前无法获得的库中释放出来，在 O（2）有限的处理中。因此，我们认为，突发生长是对生长素的一种反应，这种生长素在无氧条件下释放出来：当 O（2）不再受到限制时，新的移动或扩散的生长素促进生长。
Zotero 插件