Hydrophobic metabolites of 2,4-dichlorophenoxyacetic acid (2,4-D) in cultured coconut tissue
作者:Arturo López-Villalobos、Roland Hornung、Peter F. Dodds
DOI:10.1016/j.phytochem.2004.08.034
日期:2004.10
[14C]2,4-dichlorophenoxyacetic acid (2,4-D), so that its metabolic fate could be studied. Thin layer chromatography of methanol extracts of the plumular tissue showed that four classes of metabolites, as well as the unchanged acid, were recovered in the extract. In inflorescence tissue, only the unchanged acid and the most polar class of metabolites (metabolite I) were recovered. Metabolite I was
在生长素 [14C]2,4-二氯苯氧乙酸 (2,4-D) 存在下维持椰子棕榈 (Cocos nucifera L.) 的花序和羽状组织的培养物,以便可以研究其代谢命运。羽状组织甲醇提取物的薄层色谱表明,提取物中回收了四类代谢物以及未变化的酸。在花序组织中,仅回收了未变化的酸和极性最强的代谢物(代谢物 I)。代谢物 I 主要由糖结合物的混合物组成,代谢物 II(第二极性)是一种未知的碱性代谢物。代谢物 III 和 IV 都是新型三酰基甘油类似物,其中一种天然脂肪酸被链延长形式的 2,4-D 取代。反相薄层色谱法用于鉴定 2,4-D 衍生的酸,发现代谢物 III 含有连接到 2 到 12 个碳链长度的 2,4-二氯苯氧基部分,而代谢物 III IV包含12、14和16个碳链长度。在花序组织中,以及在低蔗糖或 2,4-D 浓度下的羽状组织中,经过短期培养,代谢物 I 占主导地位。当羽毛培养时间延长或蔗糖或