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- Title
Bivalent Metal-Chelating Properties of Harzianic Acid Produced by Trichoderma pleuroticola Associated to the Gastropod Melarhaphe neritoides.
- Authors
De Tommaso, Gaetano; Salvatore, Maria Michela; Nicoletti, Rosario; DellaGreca, Marina; Vinale, Francesco; Bottiglieri, Assunta; Staropoli, Alessia; Salvatore, Francesco; Lorito, Matteo; Iuliano, Mauro; Andolfi, Anna
- Abstract
Harzianic acid is a secondary metabolite of Trichoderma, structurally belonging to the dienyltetramic acid subgroup of the tetramic acids. Biological activities of harzianic acid are of great interest for its antimicrobial and plant growth-promoting activities, which might be related to its chelating properties. In the present work harzianic acid, isolated from cultures of a strain of Trichoderma pleuroticola associated to the gastropod Melarhaphe neritoides, was studied as a complexant agent of a number of biologically relevant transition metals (i.e., Zn2+, Fe2+, Cu2+, and Mn2+), using UV-VIS, potentiometry, MS and NMR techniques. Our findings show the coordination capacity of harzianic acid toward the above cations through the formation of neutral or charged complexes in a variable ratio depending on the metal and pH conditions.
- Subjects
TETRAMIC acids; TRICHODERMA; GASTROPODA; TRANSITION metals; COMPLEX variables
- Publication
Molecules, 2020, Vol 25, Issue 9, p2147
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules25092147