Interactions between Zn Enrichment of Grapes cv. Syrah Fertilized with ZnO and Photoassimilates Mobilization

Diana Daccak; Ana Coelho Marques; Ana Rita F. Coelho; Cláudia Campos Pessoa; Inês Carmo Luís; José C. Ramalho; Maria José Silva; Ana Paula Rodrigues; Paula Scotti Campos; Isabel P. Pais; José N. Semedo; Manuela Simões; Maria Manuela Silva; José Carlos Kullberg; Maria Graça Brito; Paulo Legoinha; Fernando H. Reboredo; Maria Fernanda Pessoa; Fernando C. Lidon

doi:10.3390/IECPS2021-11936

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Interactions between Zn Enrichment of Grapes cv. Syrah Fertilized with ZnO and Photoassimilates Mobilization

Diana Daccak

^{*

1, 2},

Ana Coelho Marques

^{1, 2},

Ana Rita F. Coelho

^{1, 2},

Cláudia Campos Pessoa

^{1, 2},

^{1, 2},

^{2, 3},

^{2, 3},

³,

^{2, 4},

^{2, 4},

^{2, 4},

^{1, 2},

^{2, 5},

^{1, 2},

^{1, 2},

^{1, 2},

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Maria Fernanda Pessoa

^{1, 2},

Fernando C. Lidon

^{1, 2}

¹ Earth Sciences Department, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa. Campus da Caparica, 2829-516 Caparica, Portugal.
² GeoBioTec Research Center, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa. Campus da Caparica, 2829-516 Caparica, Portugal.
³ PlantStress & Biodiversity Lab, Centro de Estudos Florestais (CEF), Instituto Superior Agronomia (ISA), Uni-versidade de Lisboa (ULisboa), Quinta do Marquês, Av. República, 2784-505 Oeiras, and Tapada da Ajuda, 1349-017 Lisboa, Portugal.
⁴ Instituto Nacional de Investigação Agrária e Veterinária, I.P. (INIAV), Avenida da República, Quinta do Marquês, 2780-157 Oeiras, Portugal.
⁵ ESEAG-COFAC, Avenida do Campo Grande 376, 1749-024 Lisboa, Portugal.

Academic Editor: Feibo Wu

Published: 30 November 2021 by MDPI in The 2nd International Electronic Conference on Plant Sciences—10th Anniversary of Journal Plants session Plant Physiology, Signalling and Communication

https://doi.org/10.3390/IECPS2021-11936

Abstract:

Micronutrients have an important role in crops, namely Zn, being responsible for several physiological pathways, improving crops quality and growth. Zinc role is related to enzymes activity, carbohydrate metabolism, photosynthesis, protein metabolism and maintenance of the integrity of biological membranes. Considering his importance and the deficiency observed worldwide, an itinerary of foliar spraying with zinc oxide (ZnO) in vines of cv. Syrah during the production cycle, was outlined at Biscaia field in Palmela, Portugal (38º 35’23.629’’N; 8º 51’ 46.208’’ W). The treatment applied has concentrations of 10% and 30% (150 and 450 g ha^-1). At harvest, Zn concentration in grapes, reached a maximum increase of 55 % with the highest treatment concentration, face to control. Also, leaf gas exchange after foliar spraying, didn’t present toxic signs in both concentrations, even being observed a positive impact in Pn and iWUE, thus contributing to biomass levels. Moreover, remote detection through Unmanned Aerial Vehicles (UAV’s), allowed to obtain the morphology of the field, being observed a superficial drainage capacity of 65 % with water lines in the direction of NW-SE and SE sense, along the lines of the vines, also contributing to quality of the crops. This strategy of Zn enrichment, demonstrated to have potential benefits for crops, being additionally advantageous for consumption since this micronutrient has several important functions.

Keywords: Leaf gas exchange; Syrah; Zn; ZnO

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