Effects of Arthrospira platensis Extract on Physiology and Berry Traits in Vitis vinifera.

Linda Salvi,Alberto Niccolai,Eleonora Cataldo,Paolo Storchi,Francesca Paoli,Giovan Battista Mattii,Sofia Sbraci,Mario R Tredici,Liliana Rodolfi

doi:10.3390/plants9121805

Linda Salvi, Alberto Niccolai + Show 7 more

Open Access

https://doi.org/10.3390/plants9121805

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Abstract

Several advantages on physiology, productivity, and grape quality have been reported for grapevine treated with seaweed extracts, but little is known about the importance of cyanobacterial-based biostimulants in viticulture. The purpose of this pioneering work was to analyze the broad-spectrum effects of the Arthrospira platensis F&M-C256 extract on Vitis vinifera L. cv. Pinot Nero grown in pots in optimal conditions and under water stress. To evaluate the effects, major physiological parameters of the plants and the quali-quantitative parameters of grape were analyzed. According to the results obtained in this study, ameliorating effects in leaf gas exchanges induced by A. platensis F&M-C256 treatments were detected in both irrigation regimes. Above all, A. platensis F&M-C256 allowed keeping stomata open without negative consequences in water potential in treated vines under water-stress conditions. In terms of berry traits, A. platensis F&M-C256-treated vines presented higher berry weight in comparison with untreated vines in both water regimes and improved berry composition in treated vines subjected to drought. The results of the present study demonstrated an A. platensis-dependent physiological response in case of abiotic stress, which prominently affects grape traits at harvest.

Highlights

One of the modern challenges of viticulture and winemaking is to satisfy customer expectations for constant supply and product quality, despite seasonal fluctuations in yield and grape composition driven by variable environmental conditions [1,2].A wide range of effects due to temperature, solar radiation, and precipitation on vine physiology, productivity, and grape traits were largely documented in the literature [3,4]
The values of physiological parameters of V. vinifera treated with A. platensis F&M-C256 extract (APE) compared to control (CTRL, untreated plants) under two irrigation regimes are presented in
The present research tested the influence of an A. platensis extract on vine physiology, productivity, and grape quality, under two irrigation conditions

Summary

Introduction

One of the modern challenges of viticulture and winemaking is to satisfy customer expectations for constant supply and product quality, despite seasonal fluctuations in yield and grape composition driven by variable environmental conditions [1,2].A wide range of effects due to temperature, solar radiation, and precipitation on vine physiology, productivity, and grape traits were largely documented in the literature [3,4]. One of the modern challenges of viticulture and winemaking is to satisfy customer expectations for constant supply and product quality, despite seasonal fluctuations in yield and grape composition driven by variable environmental conditions [1,2]. Heat and water availability are determinant factors for yield and quality attributes in two harvests, since floral differentiation and initiation-induction of inflorescences take place in the period of bud break-fruit set over two consecutive seasons [1,8,9]. Extreme heat or heat fluctuations may lead to phenological advancement and to an asynchronous achievement of technological and phenolic maturities [10,11,12]. This promotes the accumulation of grape sugars in the flesh and Plants 2020, 9, 1805; doi:10.3390/plants9121805 www.mdpi.com/journal/plants

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