Application of Aureobasidium pullulans in iron-poor soil. Can the production of siderophores improve iron bioavailability and yeast antagonistic activity?

TitleApplication of Aureobasidium pullulans in iron-poor soil. Can the production of siderophores improve iron bioavailability and yeast antagonistic activity?
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2022
AuthorsDi Francesco, A., Sciubba L., Bencivenni M., Marzadori C., and Baraldi E.
JournalAnnals of Applied Biology
Volume180
Pagination398-406
ISSN00034746
Keywordsantagonism, Bioavailability, biocontrol agent, crop plant, Inoculation, Iron, Siderophore, soilborne disease, Yeast
Abstract

Iron is a fundamental element for plants as well as for microorganisms and several pathogens, including Rhizoctonia solani, one of the main soil-borne pathogens of tomato. This study demonstrated the ability of Aureobasidium pullulans strain L1 to produce siderophores and how these molecules were, directly and indirectly, connected to its antagonistic activity and iron bioavailability. By ICP-OES (Inductively Coupled Plasma—Optical Emission Spectroscopy) trace analysis, the strain displayed the ability to increase the bioavailability of Fe (II) in the soil by almost 50% 30 days after inoculation. Also, the bioavailability of Mn, Cu and Zn was increased after 30 days of incubation in the soil by 31.8, 38.4 and 27.1%, respectively. In in vivo assays, A. pullulans L1 strain showed a growth promotion of tomato roots length and stem diameter, respectively, by 19.1 and 27.3%, and acted as a biocontrol agent (BCA) against R. solani (80% of inhibition). The results demonstrate a new aspect of this microorganism, usually applied as an antagonist of postharvest fruit diseases, to explore in different environments and against different pathogens, such as soil-borne pathogens. © 2021 The Authors. Annals of Applied Biology published by John Wiley & Sons Ltd on behalf of Association of Applied Biologists.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85118478011&doi=10.1111%2faab.12742&partnerID=40&md5=0f91d1eb40663a6d8164c8bf46938636
DOI10.1111/aab.12742