Luteoethanones A and B, two phytotoxic 1-substituted ethanones produced by Neofusicoccum luteum, a causal agent of Botryosphaeria dieback on grapevine

Abstract

Two new phytotoxic 1-substituted ethanones, named luteoethanones A and B, were isolated from Neofusicoccum luteum, the causal agents of Botryosphaeria dieback in Australia. Luteoethanones A and B were characterized, by spectroscopic methods (essentially 1 D and 2 D NMR and HR ESIMS), as 1-(8-Methoxy-2,4-methyl-1-oxa-4-aza-spiro[2.5]octa-5,7-dien-6-yl)-ethanone and its 2-demethyl analogue. When assayed on detached grapevine leaves (Vitis vinifera cv. Shiraz) both the compounds showed phytotoxic activity.

Graphical Abstract

Keywords:

• Grapevine
• Botryosphaeria dieback
• Neofusicoccum luteum
• phytotoxins
• luteoethanones A and B

Disclosure statement

No potential conflict of interest was reported by the author(s).

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This research was funded by Programme STAR 2017, financially supported by UniNA and Compagnia di San Paolo, grant number E62F16001250003. A. Evidente is associated with “Istituto di Chimica Biomolecolare del CNR”, Pozzuoli.