Potential Fertilization Capacity of Two Grapevine Varieties: Effects on Agricultural Production in Designation of Origin Areas in the Northwestern Iberian Peninsula

Autor: María Fernández-González, J. Antonio Cortiñas Rodríguez, María Jesús Aira, Rosa Ana Vázquez-Ruiz, F. Javier Rodríguez-Rajo, Estefanía González-Fernández
Přispěvatelé: Universidade de Santiago de Compostela. Departamento de Botánica
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Agronomy
Volume 10
Issue 7
Minerva. Repositorio Institucional de la Universidad de Santiago de Compostela
instname
Minerva: Repositorio Institucional de la Universidad de Santiago de Compostela
Universidad de Santiago de Compostela (USC)
Investigo. Repositorio Institucional de la Universidade de Vigo
Universidade de Vigo (UVigo)
Agronomy, Vol 10, Iss 961, p 961 (2020)
ISSN: 2073-4395
DOI: 10.3390/agronomy10070961
Popis: In the present study, we analyzed the main parameters related with the potential fertilization ability of two grapevine varieties, Godello and Mencí
a, during the years 2017 and 2018. The research was carried out in two vineyards of the Galician winegrowing Designation of Origin areas of Ribeiro and Ribeira Sacra. Ten vines of each variety were selected for bunch and flower counting, pollen calculations, pollen viability studies by means of aceto-carmine (AC) stain and 2, 3, 5-triphenyl tetrazolium chloride (TTC) methods, and the determination of their germination rate. In all vineyards the 50% fruitset was reached, except for Godello in Cenlle during 2017. The mean coulure value was higher for Godello (40.5%) than for Mencí
a (31%). Analyzing the pollen production per plant and airborne pollen levels, we observed important discordances between them, which can be due to the influence of weather conditions and be related with self-pollination processes. We found important differences on pollen viability depending on the applied method and variety, with higher values for the AC method than the TTC for both varieties in all study plots, and higher values for Mencí
a variety than Godello. Regarding germination rates, we observed a marked reduction in 2017 with respect to 2018, in all study sites and for both varieties. The analyzed parameters were useful to explain the different productive abilities of Godello and Mencí
a varieties in the two studied bioclimatic regions of Ribeiro and Ribeira Sacra.
Databáze: OpenAIRE
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