BIO Web Conf.
Volume 13, 2019CO.NA.VI. 2018 - 7° Convegno Nazionale di Viticoltura
|Number of page(s)||4|
|Section||Physiology and Eco-physiology|
|Published online||01 April 2019|
Interactive effects of biostimulants and water stress on potted Pinot noir grapevines
Effetti dell’interazione biostimolante-regime idrico su viti Pinot nero allevate in vaso
DISPAA, Dipartimento di Scienze delle Produzioni Agroalimentari e dell’Ambiente, Università di Firenze, Viale delle Idee 30, 50019, Sesto Fiorentino (FI), Italia
2 CREA-VIC, consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria, Unità di Ricerca per la Viticoltura, Arezzo
* Corresponding author: firstname.lastname@example.org
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.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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