Seaweeds extracts (SWE) are innovative and non-polluting tools that have become popular as biostimulants. Their effects on Pinot noir water potential, gas exchanges and fruit quality under drought stress and full irrigation were evaluated during the 2017 growing season. Differential irrigations were applied and Pinot Noir grapevines have been sprayed two times at label doses (3 g/L) during the vegetative growth, with the Ascophyllum nodosum exract, starting from veraison. During the season, measurements of single leaf gas exchange and stem water potential were made; moreover parameters of technological maturity (°Brix, acidity, pH) and phenological one were analyzed. The inhibition of gas exchange and increase of stomatal limitation induced by drought stress were not reduced by SWE where A.nodosum had positive effects on midday stem water potential. Under full irrigation SWE increased leaf gas exchange. No particular effect was observed on the technological parameters after the treatment. The application of the seaweed extract improved polyphenols accumulation in stressed theses, increasing wine grapes quality. A.nodosum can be useful to reduce negative effects of abiotic stress such lack of water and to improve polyphenols content in grapes, especially in genotypes with a limited phenolic profile like Pinot Noir variety.

Effetti dell’interazione biostimolante-regime idrico su viti Pinot nero allevate in vaso / Sofia Sbraci, Linda Salvi, Francesca Paoli, Eleonora Cataldo , Alessandra Zombardo, Giovan Battista Mattii. - STAMPA. - 22:(2018), pp. 47-47. (Intervento presentato al convegno 7° Convegno nazionale di Viticoltura tenutosi a Piacenza nel 9-11 luglio 2018).

Effetti dell’interazione biostimolante-regime idrico su viti Pinot nero allevate in vaso

Linda Salvi;Eleonora Cataldo;Alessandra Zombardo;Giovan Battista Mattii
2018

Abstract

Seaweeds extracts (SWE) are innovative and non-polluting tools that have become popular as biostimulants. Their effects on Pinot noir water potential, gas exchanges and fruit quality under drought stress and full irrigation were evaluated during the 2017 growing season. Differential irrigations were applied and Pinot Noir grapevines have been sprayed two times at label doses (3 g/L) during the vegetative growth, with the Ascophyllum nodosum exract, starting from veraison. During the season, measurements of single leaf gas exchange and stem water potential were made; moreover parameters of technological maturity (°Brix, acidity, pH) and phenological one were analyzed. The inhibition of gas exchange and increase of stomatal limitation induced by drought stress were not reduced by SWE where A.nodosum had positive effects on midday stem water potential. Under full irrigation SWE increased leaf gas exchange. No particular effect was observed on the technological parameters after the treatment. The application of the seaweed extract improved polyphenols accumulation in stressed theses, increasing wine grapes quality. A.nodosum can be useful to reduce negative effects of abiotic stress such lack of water and to improve polyphenols content in grapes, especially in genotypes with a limited phenolic profile like Pinot Noir variety.
2018
Atti del 7° Convegno nazionale di Viticoltura
7° Convegno nazionale di Viticoltura
Piacenza
Sofia Sbraci, Linda Salvi, Francesca Paoli, Eleonora Cataldo , Alessandra Zombardo, Giovan Battista Mattii
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1134567
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