Document Type : Research paper
Authors
1
Grapevine Production and Genetic Improvement Department, Iranian Grape and Raisin Institute, Malayer University, Iran
2
Department of Horticulture and Landscape Engineering, Faculty of Agriculture, Malayer University, Iran.
3
Department of Horticultural Sciences Engineering, Faculty of Agriculture and Natural Resources Imam Khomeini International University, Qazvin, Iran
4
Department of Agronomy and Plant Breeding, Faculty of Agriculture, Malayer University, Malayer, Iran.
Abstract
The objectives of this study were to compare some physiological indices related to winter cold tolerance of two field-grown grapevine (Vitis vinifera L.) cultivars under different training systems. This experiment was conducted during two consecutive years (2020 and 2021) factorially based on a randomized block design, with three sampling dates including Dec., Jan. and Feb. for each year. Treatments included of two factors: (1) four training systems (One non-trellis or creeping (C) and three bilateral cordon trellis (I-shape, T-shape and Y-shape) systems), (2) grape cultivars (‘Khalili’ and Perlette’). In all three-sampling phase in both years, the bud malondialdehyde (MDA), Hydrogen peroxide (H2O2) and water content (WC) were higher in ‘Perlette’ cultivar under creeping training system compared to cordon trellis systems, however Khalili’ cultivar under the Y-shape bilateral cordon training system had higher proline, soluble sugar, polyamines and abscisic acid content in all three sampling stages compared to other treatments. In both years, the content of these compounds was lower in ‘Perlette’ cultivar under creeping training system compared to bilateral cordon trellis systems in all three-sampling stages. According to the results, the cordon training systems were able to increase the cold tolerance levels of both cultivars compared to the creeping system, and among the training systems, the Y-shape cordon training system led to the induction of more cold tolerance to the vines compared to the T and I-shapes training system.
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