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Article

Response of Merlot Grapevine to Drought Is Associated to Adjustments of Growth and Nonstructural Carbohydrates Allocation in above and Underground Organs

1
Department of Agricultural Food, Animal and Environmental Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy
2
Department of Life Sciences, University of Trieste, Via Licio Giorgieri, 5, 34127 Trieste, Italy
*
Author to whom correspondence should be addressed.
Co-first author, these authors contributed equally to this work.
Academic Editors: Saseendran S. Anapalli and Matthias Finkbeiner
Water 2021, 13(17), 2336; https://doi.org/10.3390/w13172336
Received: 22 July 2021 / Revised: 16 August 2021 / Accepted: 24 August 2021 / Published: 26 August 2021
Studying changes in partitioning of dry matter and nonstructural carbohydrates (NSC) content in both aboveground and underground perennial tissues in drought-affected grapevines could provide insights into plant response and carbon allocation strategies during stress periods. The analysis of soluble NSC and starch content in leaf petioles, due to their role in hydraulic segmentation, should also be considered. In the present research, these aspects have been investigated in Merlot grapevines grown in pots and subjected to progressive and increasing soil dehydration, and in well-irrigated vines. Drought conditions caused drastic reduction of shoot elongation and total plant leaf area development in favor of a greater biomass allocation and partitioning towards roots, where most of the NSC reserves were also conserved. Dry matter content of the perennial organs increased in stressed vines due to growth reduction, allocation of carbon reserves and possible anatomical modifications. Vines subjected to drought showed a higher NSC content in petioles, supporting the hypothesis that they are involved as compatible solutes in osmotic adjustments. View Full-Text
Keywords: drought; Vitis vinifera; NSC; Merlot; dry matter allocation drought; Vitis vinifera; NSC; Merlot; dry matter allocation
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MDPI and ACS Style

Vuerich, M.; Braidotti, R.; Sivilotti, P.; Alberti, G.; Casolo, V.; Braidot, E.; Boscutti, F.; Calderan, A.; Petrussa, E. Response of Merlot Grapevine to Drought Is Associated to Adjustments of Growth and Nonstructural Carbohydrates Allocation in above and Underground Organs. Water 2021, 13, 2336. https://doi.org/10.3390/w13172336

AMA Style

Vuerich M, Braidotti R, Sivilotti P, Alberti G, Casolo V, Braidot E, Boscutti F, Calderan A, Petrussa E. Response of Merlot Grapevine to Drought Is Associated to Adjustments of Growth and Nonstructural Carbohydrates Allocation in above and Underground Organs. Water. 2021; 13(17):2336. https://doi.org/10.3390/w13172336

Chicago/Turabian Style

Vuerich, Marco, Riccardo Braidotti, Paolo Sivilotti, Giorgio Alberti, Valentino Casolo, Enrico Braidot, Francesco Boscutti, Alberto Calderan, and Elisa Petrussa. 2021. "Response of Merlot Grapevine to Drought Is Associated to Adjustments of Growth and Nonstructural Carbohydrates Allocation in above and Underground Organs" Water 13, no. 17: 2336. https://doi.org/10.3390/w13172336

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