A new GC-MS method for the analysis of ascaulitoxin, its aglycone and 4-aminoproline from culture filtrates of Ascochyta caulina

被引:6
作者
Fiore, Michele [2 ]
Rimando, Agnes M. [2 ]
Andolfi, Anna [1 ]
Evidente, Antonio [1 ]
机构
[1] Univ Naples Federico II, Dipartimento Sci Suolo Pianta Ambiente & Prod Ani, I-80055 Portici, Italy
[2] USDA ARS, Nat Prod Utilizat Res Unit, Oxford, MS 38677 USA
关键词
CHENOPODIUM-ALBUM; PHYTOTOXINS;
D O I
10.1039/b9ay00162j
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A new GC-MS method was developed for the analysis of ascaulitoxin, its aglycone, and 4-amino-D-proline, which are phytotoxins with potential herbicidal activity produced by Ascochyta caulina. The method involved directly treating the lyophilized culture filtrate with a derivatizing reagent, converting the mixture of toxins in the filtrate to their corresponding trimethylsilyl derivatives, and consequent analysis by EI-MS. The method is rapid, sensitive and highly specific for the identification and analysis of the toxins in a complex sample matrix. Analysis of culture filtrates using this method suggested that phytotoxicity correlates with the level of ascaulitoxin in the culture filtrate. A new method for the purification of 2,4,7-triamino-5-hydroxyoctandioic acid, the aglycone of ascaulitoxin, is also described.
引用
收藏
页码:159 / 163
页数:5
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