title: Trans-4-aminoproline, a phytotoxic metabolite with herbicidal activity produced by Ascochyta caulina.
abstract: A phytotoxic metabolite, characterized through NMR techniques and synthetic methods as trans-4-aminoproline, was isolated from the culture filtrates of Ascochyta caulina, a promising mycoherbicide for biological control of Chenopodium album. The metabolite, which shows interesting phytotoxic properties, together with ascaulitoxin (recently characterized as N.2-beta-D-glucoside of the unusual bis-amino acid 2,4,7-triamino-5-hydroxyoctandioc acid) and another unidentified compound, compose an active fraction of A. caulina culture filtrates with promising herbicidal properties. When assayed on leaves of host and non host dicots, including wild and cultivated plants, the trans-4-aminoproline showed a wide range of toxicity, with leaves of C. album being the most sensitive. Other interesting aspects were its inefficacy on several monocots, both cultivated and wild, and its lack of antifungal, antibiotic and zootoxic activities. This is the first report on trans-4-aminoproline as naturally occurring compound and phytotoxic metabolite produced by A. caulina.
authors.affiliation: Dipartimento di Scienze Chimico-Agrarie, Universitá di Napoli Federico II, Portici, Italy. evidente@unina.it
authors.forename: A
authors.initials: A
authors.lastname: Evidente
authors.forename: A
authors.initials: A
authors.lastname: Andolfi
authors.forename: M
authors.initials: M
authors.lastname: Vurro
authors.forename: M C
authors.initials: MC
authors.lastname: Zonno
authors.forename: A
authors.initials: A
authors.lastname: Motta
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D001156:Artemia; D001203:Ascomycota / Q000502:physiology*; D004926:Escherichia coli / Q000187:drug effects; D005848:Geotrichum / Q000187:drug effects; D006540:Herbicides / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D008826:Microbial Sensitivity Tests; D015394:Molecular Structure; D010572:Pest Control, Biological; D011549:Pseudomonas / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000890:Anti-Infective Agents; D006540:Herbicides