Defoliation and water leaf potential effects on oenological properties of Merlot (Vitis vinifera L.) grape must
Serkan Candar
Tekirdağ Viticulture Research Institute, 59200, Tekirdağ, Turkeyhttps://orcid.org/0000-0002-2608-8691
Elman Bahar
Tekirdağ Namık Kemal University, Faculty of Agriculture, Horticulture Department, 59100 Tekirdağ, Turkeyhttps://orcid.org/0000-0002-8842-7695
İlknur Korkutal
Tekirdağ Namık Kemal University, Faculty of Agriculture, Horticulture Department, 59100 Tekirdağ, Turkeyhttps://orcid.org/0000-0002-8016-9804
Fatma Betül Aktaş
Tekirdağ Namık Kemal University, Institute of Natural and Applied Sciences, 59100 Tekirdağ, Turkeyhttps://orcid.org/0000-0002-6507-1905
Abstract
This research was carried out to determine the effects of leaf water potential and defoliation treatments on the oenological properties of grape must. Merlot/41B graft combination grapevines were cultivated in Chateau Kalpak vineyards in Tekirdağ, Şarköy. The trial was carried out for two consecutive years in the vineyard in the vegetation periods of 2019–2020 and 2020–2021. Leaf water potential treatments were S0 (Control = no irrigation), S1 (–0.3/–0.5 MPa), S2 (–0.5/–0.7 MPa) and S3 (<–0.7 MPa) and defoliation treatments were implemented as; Control(C), Full Window(FW), Right Window(RW) and Left Window (LW). As a result, the S2 (–0.5 MPa and –0.7 MPa) stress level resulted in more balanced responses, as seen in the combination of years in terms of both primary and secondary metabolites. The RW defoliation treatment may cause higher primary and secondary metabolite values in all criteria.
Keywords:
abiotic stress, berry maturity, berry quality, canopy management, leaf removalReferences
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Tekirdağ Viticulture Research Institute, 59200, Tekirdağ, Turkey https://orcid.org/0000-0002-2608-8691
Tekirdağ Namık Kemal University, Faculty of Agriculture, Horticulture Department, 59100 Tekirdağ, Turkey https://orcid.org/0000-0002-8842-7695
Tekirdağ Namık Kemal University, Faculty of Agriculture, Horticulture Department, 59100 Tekirdağ, Turkey https://orcid.org/0000-0002-8016-9804
Tekirdağ Namık Kemal University, Institute of Natural and Applied Sciences, 59100 Tekirdağ, Turkey https://orcid.org/0000-0002-6507-1905
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