Department of Plant Science, University of Alberta, Edmonton, Alberta, Canada T6G 2P5.
Plant Physiol. 1982 Mar;69(3):563-7. doi: 10.1104/pp.69.3.563.
The development of xylanase activity by isolated barley (Hordeum vulgare cv. Himalaya) aleurone layers exposed to gibberellic acid was enhanced by ethylene, whereas the rate of glucanase synthesis was unaffected by ethylene. The elevated xylanase activity expressed in ethylene-treated tissue may be responsible for enhanced release of amylase in response to ethylene.The redistribution of ionic species in response to gibberellic acid and ethylene was explored. The release of calcium was much more sensitive to ethylene than the release of any of the other ions investigated (potassium, magnesium, and phosphate). Ethylene induced a 101% increase in the release of calcium from gibberellic acid-treated aleurone layers. The possible relevance of this observation to the ethylene-enhanced release of amylase is discussed.
用赤霉酸处理分离的大麦（Hordeum vulgare cv. Himalaya）糊粉层，发现乙烯能增强木聚糖酶的活性，而葡聚糖酶的合成速率不受乙烯的影响。在乙烯处理的组织中表达的升高的木聚糖酶活性可能是对乙烯响应增强淀粉酶释放的原因。研究了赤霉素酸和乙烯对离子种类再分布的影响。与其他研究的离子（钾、镁和磷酸盐）相比，钙的释放对乙烯更为敏感。乙烯诱导赤霉素处理的糊粉层中钙的释放增加了 101%。讨论了这一观察结果与乙烯增强淀粉酶释放的可能相关性。
