Perazzolli, Michele; Nesler, Andrea; Giovannini, Oscar; Antonielli, Livio; Puopolo, Gerardo and Pertot, Ilaria (2020) Ecological impact of a rare sugar on grapevine phyllosphere microbial communities. Microbiological Research, 232, p. 126387.
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Document available online at: https://www.sciencedirect.com/science/article/pii/S0944501319308675
Summary
Plants host a complex microbiota inside or outside their tissues, and phyllosphere microorganisms can be influenced by environmental, nutritional and agronomic factors. Rare sugars are defined as monosaccharides with limited availability in nature and they are metabolised by only few certain microbial taxa. Among rare sugars, tagatose (TAG) is a low-calories sweetener that stimulates and inhibits beneficial and pathogenic bacteria in the human gut microbiota, respectively. Based on this differential effect on human-associated microorganisms, we investigated the effect of TAG treatments on the grapevine phyllosphere microorganisms to evaluate whether it can engineer the microbiota and modify the ratio between beneficial and pathogenic plant-associated microorganisms. TAG treatments changed the structure of the leaf microbiota and they successfully reduced leaf infections of downy mildew (caused by Plasmopara viticola) and powdery mildew (caused by Erysiphe necator) under field conditions. TAG increased the relative abundance of indigenous beneficial microorganisms, such as some potential biocontrol agents, which could partially contribute to disease control. The taxonomic composition of fungal and bacterial leaf populations differed according to grapevine locations, therefore TAG effects on the microbial structure were influenced by the composition of the originally residing microbiota. TAG is a promising biopesticide that could shift the balance of pathogenic and beneficial plant-associated microorganisms, suggesting selective nutritional/anti-nutritional properties for some specific taxa. More specifically, TAG displayed possible plant prebiotic effects on the phyllosphere microbiota and this mechanism of action could represent a novel strategy that can be further developed for sustainable plant protection.
| EPrint Type: | Journal paper |
|---|---|
| Agrovoc keywords: | Language Value URI English Microbiota -> microbial flora http://aims.fao.org/aos/agrovoc/c_16367 English disease control http://aims.fao.org/aos/agrovoc/c_2327 |
| Subjects: | Environmental aspects > Biodiversity and ecosystem services Crop husbandry > Crop health, quality, protection |
| Research affiliation: | Italy |
| Horizon Europe or H2020 Grant Agreement Number: | 773431 |
| Deposited By: | Perazzolli, Prof. Michele |
| ID Code: | 40142 |
| Deposited On: | 05 Jul 2021 08:26 |
| Last Modified: | 25 Aug 2022 11:24 |
| Document Language: | English |
| Status: | Published |
| Refereed: | Peer-reviewed and accepted |
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