Goeschl J D, Rappaport L, Pratt H K
Department of Vegetable Crops, University of California, Davis.
Plant Physiol. 1966 May;41(5):877-84. doi: 10.1104/pp.41.5.877.
Pea epicotyls (Pisum sativum, cv. Alaska) were enclosed in chambers in which their elongation was restricted by means of a foam neoprene stopper or by a medium of glass beads. These treatments increased evolution of ethylene and resulted in reduced length and increased diameter of both the internodes and the cells of the internodes. These responses increased with increasing degrees of restriction. A time-sequence study of the emergence of epicotyls through 90 mm of glass beads showed that an accelerated evolution of ethylene preceded a reduction in elongation. As the epicotyls elongated through the glass bead medium and less resistance was encountered, evolution of ethylene declined and rapid elongation was resumed. The morphological and anatomical effects of a 120-mm column of glass beads were duplicated by applied ethylene concentrations of 0.2 ppm or less. Evolution of CO(2) was inhibited slightly by the ethylene treatments. The data indicate that production of ethylene by pea epicotyls is increased by nonwounding physical stress, and that the ethylene acts as an endogenous growth regulator, decreasing elongation and increasing diameter in response to increasing increments of stress.
豌豆上胚轴（豌豆，品种为阿拉斯加）被放置在小室中，在小室里，它们的伸长通过泡沫氯丁橡胶塞或玻璃珠介质来限制。这些处理增加了乙烯的释放，并导致节间长度缩短、节间直径增大以及节间细胞直径增大。这些反应随着限制程度的增加而增强。一项关于上胚轴穿过90毫米玻璃珠过程的时间序列研究表明，乙烯释放加速先于伸长减少。当上胚轴穿过玻璃珠介质伸长且遇到的阻力变小时，乙烯释放减少，伸长又迅速恢复。120毫米玻璃珠柱产生的形态学和解剖学效应可通过施加0.2 ppm或更低浓度的乙烯来复制。乙烯处理略微抑制了二氧化碳的释放。数据表明，豌豆上胚轴因非创伤性物理胁迫而增加乙烯生成，并且乙烯作为一种内源性生长调节剂，随着胁迫增量的增加，会减少伸长并增加直径。
