Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes
In the context of increasing consumer demand for high-quality, residue-free fruits and the growing emphasis on sustainable postharvest technologies, identifying effective, eco-friendly treatments to maintain grape quality during storage has become a critical focus in modern viticulture. Over the cou...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
|
| Series: | Horticulturae |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2311-7524/11/6/656 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849433412592467968 |
|---|---|
| author | Güzin Tarım Sinem Karakus Nurhan Keskin Harlene Hatterman-Valenti Ozkan Kaya |
| author_facet | Güzin Tarım Sinem Karakus Nurhan Keskin Harlene Hatterman-Valenti Ozkan Kaya |
| author_sort | Güzin Tarım |
| collection | DOAJ |
| description | In the context of increasing consumer demand for high-quality, residue-free fruits and the growing emphasis on sustainable postharvest technologies, identifying effective, eco-friendly treatments to maintain grape quality during storage has become a critical focus in modern viticulture. Over the course of this study, we examined the influence of seaweed extract (derived from <i>Ascophyllum nodosum</i>) and ethanol-based postharvest treatments on the postharvest quality of the ‘Tarsus Beyazı’ grape. The seaweed extract was applied at six specific phenological stages according to the BBCH scale: BBCH 13 (3rd–4th leaf stage, 0.40%), BBCH 60 (first flower sheath opening, 0.50%), BBCH 71 (fruit set, 0.50%), BBCH 75 (chickpea-sized berries, 0.50%), BBCH 81 (start of ripening, 0.60%), and BBCH 89 (harvest maturity, 0.60%). After harvest, grape clusters were subjected to four different postharvest treatments: untreated control, control + ethanol (20% ethanol immersion for 10 s), seaweed extract alone (preharvest applications only), and seaweed extract + ethanol (combining both preharvest and postharvest treatments). Grapes were stored at 0–1 °C and 90–95% RH for three weeks, followed by a shelf-life evaluation period of three days at 20 °C and 60–65% RH. The findings revealed that seaweed treatments, especially when applied during cluster formation and berry development, effectively mitigated physiological deterioration, preserving stem turgidity and enhancing berry firmness. In contrast, ethanol showed variable responses, occasionally exerting negative effects, with only marginal benefits observed when applied at optimal developmental stages. Both the type and timing of application emerged as critical determinants of key quality attributes such as weight loss, decay incidence, and must properties (TSS, pH, TA). Correlation and heat map analyses indicated the interrelationships among these parameters and the differential impacts of treatments. These results suggest that phenological-stage-specific seaweed applications hold significant potential as a sustainable strategy to extend the storage life and maintain the market quality of ‘Tarsus Beyazı’ grapes. |
| format | Article |
| id | doaj-art-fac9879a875a4d0e9aba3e3216f61645 |
| institution | Kabale University |
| issn | 2311-7524 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Horticulturae |
| spelling | doaj-art-fac9879a875a4d0e9aba3e3216f616452025-08-20T03:27:02ZengMDPI AGHorticulturae2311-75242025-06-0111665610.3390/horticulturae11060656Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ GrapesGüzin Tarım0Sinem Karakus1Nurhan Keskin2Harlene Hatterman-Valenti3Ozkan Kaya4Alata Horticultural Research Institute, Republic of Turkey Ministry of Agriculture and Forestry, Mersin 33740, TurkeyÇolemerik Vocational School, Hakkari University, Hakkari 30000, TurkeyDepartment of Horticulture, Faculty of Agriculture, Van Yuzuncu Yil University, Van 65080, TurkeyDepartment of Plant Sciences, North Dakota State University, Fargo, ND 58102, USADepartment of Plant Sciences, North Dakota State University, Fargo, ND 58102, USAIn the context of increasing consumer demand for high-quality, residue-free fruits and the growing emphasis on sustainable postharvest technologies, identifying effective, eco-friendly treatments to maintain grape quality during storage has become a critical focus in modern viticulture. Over the course of this study, we examined the influence of seaweed extract (derived from <i>Ascophyllum nodosum</i>) and ethanol-based postharvest treatments on the postharvest quality of the ‘Tarsus Beyazı’ grape. The seaweed extract was applied at six specific phenological stages according to the BBCH scale: BBCH 13 (3rd–4th leaf stage, 0.40%), BBCH 60 (first flower sheath opening, 0.50%), BBCH 71 (fruit set, 0.50%), BBCH 75 (chickpea-sized berries, 0.50%), BBCH 81 (start of ripening, 0.60%), and BBCH 89 (harvest maturity, 0.60%). After harvest, grape clusters were subjected to four different postharvest treatments: untreated control, control + ethanol (20% ethanol immersion for 10 s), seaweed extract alone (preharvest applications only), and seaweed extract + ethanol (combining both preharvest and postharvest treatments). Grapes were stored at 0–1 °C and 90–95% RH for three weeks, followed by a shelf-life evaluation period of three days at 20 °C and 60–65% RH. The findings revealed that seaweed treatments, especially when applied during cluster formation and berry development, effectively mitigated physiological deterioration, preserving stem turgidity and enhancing berry firmness. In contrast, ethanol showed variable responses, occasionally exerting negative effects, with only marginal benefits observed when applied at optimal developmental stages. Both the type and timing of application emerged as critical determinants of key quality attributes such as weight loss, decay incidence, and must properties (TSS, pH, TA). Correlation and heat map analyses indicated the interrelationships among these parameters and the differential impacts of treatments. These results suggest that phenological-stage-specific seaweed applications hold significant potential as a sustainable strategy to extend the storage life and maintain the market quality of ‘Tarsus Beyazı’ grapes.https://www.mdpi.com/2311-7524/11/6/656biostimulantgrape storagepostharvestseaweed extract<i>Vitis vinifera</i> L. |
| spellingShingle | Güzin Tarım Sinem Karakus Nurhan Keskin Harlene Hatterman-Valenti Ozkan Kaya Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes Horticulturae biostimulant grape storage postharvest seaweed extract <i>Vitis vinifera</i> L. |
| title | Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes |
| title_full | Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes |
| title_fullStr | Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes |
| title_full_unstemmed | Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes |
| title_short | Timing Matters, Not Just the Treatment: Phenological-Stage-Specific Effects of Seaweed and Ethanol Applications on Postharvest Quality of ‘Tarsus Beyazı’ Grapes |
| title_sort | timing matters not just the treatment phenological stage specific effects of seaweed and ethanol applications on postharvest quality of tarsus beyazi grapes |
| topic | biostimulant grape storage postharvest seaweed extract <i>Vitis vinifera</i> L. |
| url | https://www.mdpi.com/2311-7524/11/6/656 |
| work_keys_str_mv | AT guzintarım timingmattersnotjustthetreatmentphenologicalstagespecificeffectsofseaweedandethanolapplicationsonpostharvestqualityoftarsusbeyazıgrapes AT sinemkarakus timingmattersnotjustthetreatmentphenologicalstagespecificeffectsofseaweedandethanolapplicationsonpostharvestqualityoftarsusbeyazıgrapes AT nurhankeskin timingmattersnotjustthetreatmentphenologicalstagespecificeffectsofseaweedandethanolapplicationsonpostharvestqualityoftarsusbeyazıgrapes AT harlenehattermanvalenti timingmattersnotjustthetreatmentphenologicalstagespecificeffectsofseaweedandethanolapplicationsonpostharvestqualityoftarsusbeyazıgrapes AT ozkankaya timingmattersnotjustthetreatmentphenologicalstagespecificeffectsofseaweedandethanolapplicationsonpostharvestqualityoftarsusbeyazıgrapes |