Abteilung Pflanzenphysiologie der Universität, Postfach 101380, D-3500, Kassel, Federal Republic of Germany.
Planta. 1988 Sep;175(3):341-7. doi: 10.1007/BF00396339.
In gemmalings of Riella helicophylla, auxin and ethylene stimulate elongation growth, especially of pillar cells. When the two hormones are supplied simultaneously, the effects are additive, i.e. the result is 'supergrowth'. In the cells of the meristem, elongation is enhanced by auxin, but not by ethylene when given alone. However, these cells also respond with 'supergrowth' to a combined treatment with auxin and ethylene. The antiauxin p-chlorophenoxyisobutyric acid suppresses both the ethylene stimulation of cell growth and the additive 'supergrowth'. The results support the concept that auxin pre-conditions the cells to the ethylene-dependent growth event. We suggest that the response elicited by the specific cell types could be related to differences in their level of endogenous auxin.
在 Riella helicophylla 的珠心胚中，生长素和乙烯刺激伸长生长，特别是支柱细胞。当同时供应这两种激素时，效果是累加的，即产生“超生长”。在分生组织的细胞中，生长素增强伸长，但乙烯单独处理时则没有。然而，这些细胞也对生长素和乙烯的联合处理产生“超生长”反应。抗生长素 p-氯苯氧异丁酸抑制细胞生长的乙烯刺激和累加的“超生长”。这些结果支持生长素预先使细胞适应乙烯依赖性生长事件的概念。我们认为，特定细胞类型所引起的反应可能与其内源生长素水平的差异有关。
