Effects of extreme bud load and leaf removal treatments on leaf water potential, stomatal conductance and ripening of ‘Sultana’ (<i>Vitis vinifera</i> L.)

Teker, Turcan; Soltekin, Oğuzhan; Altındişli, Ahmet

doi:10.17660/actahortic.2020.1276.29

Cited by 1 publication

(2 citation statements)

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“…The mean number of harvested clusters per vine of 'Sultan 7ʹ increased by rising the number of buds in both years (Figure 3b). In previous studies to determine optimum pruning levels for seedless grape varieties showed that as the number of buds per vine increased, vine yield and the cluster number also increased (Christensen et al, 1994;Fawzi et al, 2010;Salem et al, 1997;Teker et al, 2020). It was considered that the high number of buds left per vine (150 buds per vine and 180 buds per vine) in the first year cause decrement in the cluster number in the following year in all LR practices (25% and 50% per shoot).…”

Section: Discussionmentioning

confidence: 99%

“…Aegean Region is an economically important location for the cultivation of the seedless grape, by means of its ecological superiority and historical viticulture experience of the growers. Due to its geographical location, the region has a very fertile soil character, plenty of sunshine, an available water supply, and a high potential for grape production (Söylemezoğlu et al, 2016;Teker et al, 2018Teker et al, , 2020.…”

Section: Introductionmentioning

confidence: 99%

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Excessive Pruning Levels in Young Grapevines (Vitis viniferaL. cv. Sultan 7) Cause Water Loss in Seedless Cluster Berries

Teker¹,

Altındişli

2021

International Journal of Fruit Science

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Late-season dehydration is known as a type of berry shrivel and it is often associated with wine grapes. This study is different from other berry shrivel studies as it focuses on seedless grape cv. Sultan 7 (Vitis vinifera L.) and aims to determine the effects of different pruning levels (90, 150, 180 buds per vine), leaf removal (LR) (25%, 50% per shoot) treatments on vine yield, and the number of harvested clusters. Additionally, we aim to find the effects of treatments on the number of unhealthy clusters with shriveled (S) berries. Although treatments were conducted under the same irrigation practices and determined close leaf water potential values, S berries were not obtained from the vines with 90 buds per vine treatment. Thus, S berries were determined in the lower side of unhealthy clusters together with nonshriveled (NS) berries in treatments of 150 and 180 buds per vine. It was found that the total soluble solids content and titratable acidity of S berries were higher than NS. While high pruning levels per vine enabled to obtain more clusters, the expected yield was negatively affected due to the quantity of the unhealthy cluster. Significant polynomial regression was observed between the number of harvested and unhealthy clusters in 2016 (R 2 = 0.69) and 2017 (R 2 = 0.76). In this research, it was hypothesized that the water losses in S berries of unhealthy clusters in overloaded vines (150, 180 buds per vine) were caused by obtaining more harvested clusters compared to the 90 buds per vine treatment.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%