Exogenous of 28-Homobrassinolide and Salicylic acid Treatments to Improve Fruit Quality and Photosynthesis of Table Grapes (Vitis vinifera L.) cv. Crimson Seedless.

Authors : Raed S. Shehata

Pages : 12-16

View : 152 | Download : 270

Publication Date : 2025-06-23

Article Type : Research Paper

Abstract :Our study was performed on 6 years old own rooted \\\"Crimson\\\" seedless grapevines during 2023 and 2024 respectively. Sixteen vines uniformly were selected and sprayed two times during the pre-harvest at ten days before veraison stage and at 15 – 20 % coloration. By following treatments: water as (the control), Salicylic acid (SA) at (75 ppm), 28-Homobrassinolide (28-BR) at (0.4 ppm) and Salicylic acid (SA) at (75 ppm) combined with 28-Homobrassinolide (28-BR) at (0.4 ppm). The results indicated that treatment of Salicylic acid (SA) at (75 ppm) combined with 28-Homobrassinolide (28-BR) at (0.4 ppm) Resulted in a significant increase in concentrations of anthocyanin and carotene contents. Moreover, total soluble solid and total soluble solid / acidity (Brix) where shown with high concentration and lowest concentration of Chlorophyll a, b and acidity in \\\"Crimson\\\" grape fruits with the same treatment as compared with the control in both seasons. The same treatments resulted in a significant increase in concentrations of Chlorophyll a, b, (a+b) and Total carbohydrates in \\\"Crimson\\\" grape leaves as compared with the control in both seasons. In general, the use of Salicylic acid (SA) at (75 ppm) combined with 28-Homobrassinolide (28-BR) at (0.4 ppm) two times improved quality of \\\"Crimson\\\" seedless fruits and photosynthesis.
Keywords : Salicylic acid, 28-Homobrassinolide, Photosynthesis, Fruit Quality

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