Six phytotoxins were obtained from the culture filtrates of the ascomycete Neofusicoccum batangarum, the causal agent of the scabby canker of cactus pear (Opuntia ficus-indica L.) in minor Sicily islands. The phytotoxins were identified as (-)-(R)-mellein (1); (±)-botryoisocoumarin A (2); (-)-(3R,4R)- and (-)-(3R,4S)-4-hydroxymellein (3 and 4); (-)-terpestacin (5); and (+)-3,4-dihydro-4,5,8-trihydroxy-3-methylisocoumarin, which we named (+)-neoisocoumarin (6). This identification was done by comparing their spectral and optical data with those already reported in literature. The absolute configuration (3R,4S) to (+)-neoisocoumarin (6) was determined using the advanced Mosher method. All six metabolites were shown to have phytotoxicity on the host (cactus pear) and non-host (tomato) plants, and the most active compounds were (±)-botryoisocoumarin A (2), (-)-terpestacin (5), and (+)-neoisocoumarin (6).

Phytotoxic Metabolites Isolated from Neufusicoccum batangarum, the Causal Agent of the Scabby Canker of Cactus Pear (Opuntia ficus-indica L.) / Masi, M.; Aloi, F.; Nocera, P.; Cacciola, S. O.; Surico, G.; Evidente, A.. - In: TOXINS. - ISSN 2072-6651. - 12:2(2020), p. 126. [10.3390/toxins12020126]

Phytotoxic Metabolites Isolated from Neufusicoccum batangarum, the Causal Agent of the Scabby Canker of Cactus Pear (Opuntia ficus-indica L.)

Masi M.
Writing – Original Draft Preparation
;
Nocera P.
Formal Analysis
;
Evidente A.
Writing – Review & Editing
2020

Abstract

Six phytotoxins were obtained from the culture filtrates of the ascomycete Neofusicoccum batangarum, the causal agent of the scabby canker of cactus pear (Opuntia ficus-indica L.) in minor Sicily islands. The phytotoxins were identified as (-)-(R)-mellein (1); (±)-botryoisocoumarin A (2); (-)-(3R,4R)- and (-)-(3R,4S)-4-hydroxymellein (3 and 4); (-)-terpestacin (5); and (+)-3,4-dihydro-4,5,8-trihydroxy-3-methylisocoumarin, which we named (+)-neoisocoumarin (6). This identification was done by comparing their spectral and optical data with those already reported in literature. The absolute configuration (3R,4S) to (+)-neoisocoumarin (6) was determined using the advanced Mosher method. All six metabolites were shown to have phytotoxicity on the host (cactus pear) and non-host (tomato) plants, and the most active compounds were (±)-botryoisocoumarin A (2), (-)-terpestacin (5), and (+)-neoisocoumarin (6).
2020
Phytotoxic Metabolites Isolated from Neufusicoccum batangarum, the Causal Agent of the Scabby Canker of Cactus Pear (Opuntia ficus-indica L.) / Masi, M.; Aloi, F.; Nocera, P.; Cacciola, S. O.; Surico, G.; Evidente, A.. - In: TOXINS. - ISSN 2072-6651. - 12:2(2020), p. 126. [10.3390/toxins12020126]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/795132
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