Biocontrol Activity and Plant Growth Promotion Exerted by Aureobasidium pullulans Strains
| Autor: | M. Di Foggia, Claudio Ratti, David Baldo, A. Di Francesco, Elena Baraldi, M. Corbetta |
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| Přispěvatelé: | Alessandra Di Francesco, Michele Di Foggia, Marta Corbetta, David Baldo, Claudio Ratti, Elena Baraldi |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Siderophore biology Plant physiology Virulence food and beverages 04 agricultural and veterinary sciences Plant Science biology.organism_classification 01 natural sciences Aureobasidium pullulans Rhizoctonia solani chemistry.chemical_compound chemistry Yeasts · Roots · Bioflm · Growth promoter · Metabolites 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Food science Growth inhibition Agronomy and Crop Science Pathogen Mycelium 010606 plant biology & botany |
| Popis: | The most common leguminous plants’ diseases are caused by soil-borne pathogens leading to important economic losses worldwide. Strains L1 and L8, belonging to Aureobasidium pullulans species, were tested in vitro and in vivo as biocontrol agents (BCAs) against Rhizoctonia solani (Rs1) (AG-4) and as plant growth promoters (PGPs). The non-volatile metabolites produced by L1 and L8 strains inhibited the pathogen mycelial growth by 87.9% on average, with no significant differences between the two strains. The lower pathogen diametric growth inhibition was displayed by both yeasts’ volatile metabolites (VOCs) that significantly reduced the colony growth of R. solani, and similarly to the control, with an average of 10.5%. By in vivo assay, L1 and L8 strains showed the ability to control the pathogen virulence probably through the biofilm formation around the bean and soybean plant roots, as confirmed by scanning electron microscope (SEM) analysis. The spectroscopic analysis highlighted the composition of non-volatile compounds: complex carbohydrates (pullulan), degrading enzymes, siderophores and antifungals (aureobasidins). Moreover, the ability of L1 and L8 strains to stimulate the bean and soybean plant roots, stems, and leaves growth was investigated, showing that these yeasts could have an application not only as BCAs but also as plant growth biostimulator. |
| Databáze: | OpenAIRE |
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