Two 10-macrolides, named putaminoxins D and E, were isolated together with other recently identified toxic putaminoxins from culture filtrates of Pl?oma putaminum, the causal agent of leaf necrosis of Erigeron annuus, a common weed found in fields and pastures. Putaminoxins D and E were characterized by spectroscopic and chemical methods as a new disubstituted nonen- and nonanolide, respectively. Moreover, 5-O-formylputaminoxin was isolated as an artefact from the culture filtrates acidified with formic acid. When they were assayed on leaves of host and non-host plants, putaminoxins D and E and 5-O-formylputaminoxin showed no toxicity, unlike other putaminoxins. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
Putaminoxins D and E from Phoma putaminum / Evidente, Antonio; R., Capasso; Andolfi, Anna; M., Vurro; M. C., Zonno. - In: PHYTOCHEMISTRY. - ISSN 0031-9422. - STAMPA. - 48:(1998), pp. 941-945. [10.1016/S0031-9422(97)00879-0]
Putaminoxins D and E from Phoma putaminum
EVIDENTE, ANTONIO;ANDOLFI, ANNA;
1998
Abstract
Two 10-macrolides, named putaminoxins D and E, were isolated together with other recently identified toxic putaminoxins from culture filtrates of Pl?oma putaminum, the causal agent of leaf necrosis of Erigeron annuus, a common weed found in fields and pastures. Putaminoxins D and E were characterized by spectroscopic and chemical methods as a new disubstituted nonen- and nonanolide, respectively. Moreover, 5-O-formylputaminoxin was isolated as an artefact from the culture filtrates acidified with formic acid. When they were assayed on leaves of host and non-host plants, putaminoxins D and E and 5-O-formylputaminoxin showed no toxicity, unlike other putaminoxins. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.