Implication of Proline, Phenylalanine and Abscisic Acid on Growth, Yield and Berry Quality of “Thompson Seedless” Grapevines Treated with Gibberellic Acid.
Year: 2025
Type: article
Abstract: The present study was conducted during two consecutive seasons (2024 and 2025) in a private vineyard located in the El-Nubaria region, El-Beheira governorate, Egypt. Nine-year-old Thompson Seedless grapevines, trained on the Gable system, spaced 2 × 3 meters apart in sandy soil and irrigated using a drip irrigation system were used for this trial. Eight treatments, including proline, phenylalanine, abscisic acid were applied alone or combined with gibberellic acid, along with an untreated control to evaluate their implication on vegetative growth, yield, and the physicochemical characteristics of the berries. The results demonstrated that all treatments significantly improved vine vigor and yield attributes compared with the control. The GA₃ + proline treatment produced the highest values for vegetative growth traits, including shoot length, leaf number, leaf area, and leaf chlorophyll content in the leaves, as well as yield and cluster physical characteristics such as cluster weight and berry size. All proline, phenylalanine and abscisic acid applications accelerated berry ripening of “Thompson Seedless” grapevines treated with gibberellic acid, particularly, proline treatment, which achieved the highest improvements in berry chemical traits, recording the greatest total soluble solids (TSS) and TSS/acid ratio as well as the lowest acidity.
Source: Horticulture Research Journal
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W7125798628