玉米根冠和根尖中的吲哚乙酸：用质谱碎片图法鉴定和定量。

Indolyl-3-acetic acid in cap and apex of maize roots: Identification and quantification by mass fragmentography.

机构信息

Institute of Plant Biology and Physiology, University of Lausanne, Place de la Riponne, CH-1005, Lausanne, Switzerland.

出版信息

Planta. 1974 Jan;120(2):107-12. doi: 10.1007/BF00384920.

Abstract

Quantitative analysis of indolyl-3-acetic acid (IAA) in different parts of maize root tips (Zea mays L. cv. Kelvedon 33) were performed by selective ion current monitoring detection (or mass fragmentography). It was found that the cap contained 356.6±16.2 μg of IAA kg(-1) fresh weight; the apex had only half this concentration of IAA. Calculations indicated that the 10-mm apical segments of the root contained 109.6 μg kg(-1) fresh weight. The possibility that the growth regulator formed in the cap and inhibiting the elongation of the extension zone of the root is IAA is discussed.

摘要

采用选择离子流检测（或质量碎片分析）法定量分析了玉米根尖（Zea mays L. cv. Kelvedon 33）不同部位的吲哚乙酸（IAA）。结果发现，根冠含有 356.6±16.2μg IAA kg(-1) 鲜重；根尖的浓度只有一半。计算表明，根的 10mm 根尖段含有 109.6μg IAA kg(-1) 鲜重。讨论了在根冠中形成并抑制根伸长区伸长的生长调节剂是否为 IAA 的可能性。