Impact of Application of Abscisic Acid, Benzothiadiazole and Chitosan on Berry Quality Characteristics and Plant Associated Microbial Communities of Vitis vinifera L var. Mouhtaro Plants

Dimitrios-Evangelos Miliordos, Myrto Tsiknia, Nikolaos Kontoudakis, Maria Dimopoulou, Costas Bouyioukos and Yorgos Kotseridis
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Dimitrios-Evangelos Miliordos: Laboratory of Enology and Alcoholic Drinks, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, 75 Iera Odos, 11855 Athens, Greece
Myrto Tsiknia: Soil Science and Agricultural Chemistry Lab, Department of Natural Resources and Agricultural Engineering, Agricultural University of Athens, 11855 Athens, Greece
Nikolaos Kontoudakis: Laboratory of Enology and Alcoholic Drinks, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, 75 Iera Odos, 11855 Athens, Greece
Maria Dimopoulou: Department of Wine, Vine, and Beverage Sciences, School of Food Science, University of West Attica, 12243 Athens, Greece
Costas Bouyioukos: Epigenetics and Cell Fate, CNRS UMR7216, Université de Paris, F-75013 Paris, France
Yorgos Kotseridis: Laboratory of Enology and Alcoholic Drinks, Department of Food Science and Human Nutrition, Agricultural University of Athens, Athens, 75 Iera Odos, 11855 Athens, Greece

Sustainability, 2021, vol. 13, issue 11, 1-19

Abstract: The phenolic profile of the grape berries is a key quality factor for the red grapevine varieties and several techniques have been applied to improve it. An innovative technique is the application of resistance elicitors and phytohormones. In the present study, leaves and berries of a Greek red indigenous variety (Mouhtaro) sprayed with two elicitors, benzothiadiazole and chitosan and a plant hormone abscisic acid, during veraison. Physicochemical and phenolic characteristics of the berries and microbial communities of rhizosphere, phyllosphere and carposphere were analyzed at harvest. Differences in the microbial communities on different plant compartments were observed after the application of the plant activators. Chitosan treatment increased the abundance of the beneficial lactic acid bacteria, while the abscisic acid treatment decreased the presence of spoilage fungi on the carposphere. Treatments differentiate total phenolics, anthocyanins and in the chemical characteristics of grape must with chitosan treated grapes had increased anthocyanins and skin-derived phenolics that correlated positively with the microbial taxa that was discriminant by LefSe analysis. This research provides an overview of the effect of plant activators on the microbial ecology and grape quality of the Greek variety Mouhtaro and presents the potential of new and innovative approaches in the field of sustainable viticulture.

Keywords: Vitis vinifera; Mouhtaro; resistance elicitors; plant hormones; grapevine microbiome; benzothiadiazole; chitosan; abscisic acid (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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