酸溶液对细胞壁松弛和伸长的促进作用。
Enhancement of wall loosening and elongation by Acid solutions.
作者信息
Rayle D L, Cleland R
机构信息
Department of Botany, University of Washington, Seattle, Washington 98105.
出版信息
Plant Physiol. 1970 Aug;46(2):250-3. doi: 10.1104/pp.46.2.250.
The ability of low pH and CO(2) to induce rapid cell elongation and wall loosening in the Avena coleoptile has been examined with the use of a continuous growth-recording technique and an Instron extensometer, respectively. In particular, the properties of the response to hydrogen ions have been examined in detail and have been compared with the responses initiated by CO(2) and auxin. The optimal pH for growth is about 3.0, and both the maximal growth rate and wall extensibility are similar to that produced by optimal auxin. The timing (initiated in less than 1 minute) and duration (up to 2 hours) of the response to hydrogen ions, as well as certain other aspects of the growth and wall-loosening responses, are described. It is shown that the pH response can be clearly separated from the CO(2) response. Possible mechanisms for the initiation of the growth response to low pH are briefly discussed.
分别使用连续生长记录技术和英斯特朗引伸计，研究了低pH值和CO₂诱导燕麦胚芽鞘细胞快速伸长和细胞壁松弛的能力。特别详细研究了对氢离子反应的特性，并与由CO₂和生长素引发的反应进行了比较。生长的最佳pH值约为3.0，最大生长速率和细胞壁伸展性均与最佳生长素产生的相似。描述了对氢离子反应的时间（不到1分钟开始）和持续时间（长达2小时），以及生长和细胞壁松弛反应的某些其他方面。结果表明，pH反应可与CO₂反应明显区分开来。简要讨论了低pH值引发生长反应的可能机制。
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