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Open AccessArticle
Canopy-Applied Benzothiadiazole (BTH) during the Pre-Harvest Period as a Tool to Increase Polyphenol Accumulation and Color Intensity in Cabernet Gernischt and Cabernet Franc
by
Hongjuan Wang
Hongjuan Wang 1,
Tongwei Ma
Tongwei Ma 1,
Wenle Qiang
Wenle Qiang 1,
Bo Wang
Bo Wang 2,
Yumei Jiang
Yumei Jiang 1
,
Tengzhen Ma
Tengzhen Ma 1 and
Bo Zhang
Bo Zhang 1,*
1
Gansu Key Laboratory of Viticulture and Enology, College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
2
Lanzhou Customs Integrated Technology Center, Lanzhou 730030, China
*
Author to whom correspondence should be addressed.
Agronomy 2024, 14(8), 1818; https://doi.org/10.3390/agronomy14081818 (registering DOI)
Submission received: 15 July 2024
/
Revised: 14 August 2024
/
Accepted: 15 August 2024
/
Published: 17 August 2024
Abstract
Despite the wealth of studies on benzothiadiazole (BTH) and its capacity to modulate grape polyphenol metabolism, comprehensive data detailing polyphenol accumulation at various grape growth stages remain scarce. Therefore, the present study utilized pre-harvest (at 21 days after flowering) canopy-applied BTH (50 mg/L) on Cabernet Gernischt and Cabernet Franc grapes to investigate the physicochemical and polyphenolic changes during grape maturation. The results showed that BTH treatment significantly affected the accumulation of total phenols, flavonoids, flavanols, anthocyanins, and tannins. Concurrently, it induced an increase in colorimetric parameters (CIRG, L*, b*, a*, and C*ab), resulting in the treated grapes exhibiting a greater color intensity and enhanced red-bluish colorimetric characteristics. Moreover, the BTH treatment amplified the anthocyanin content in the grapes, with the levels of petunidin-3-O-glucoside and peonidin-3-O-glucoside exhibiting remarkable increases, particularly in the Cabernet Franc grape. Notably, the content of peonidin-3-O-glucoside even surpassed that of malvidin-3-O-glucoside throughout the growth stages, indicating significant advantages in the treated samples. Additionally, the levels of flavanol, flavonols, phenolic acids, and stilbenes experienced a significant boost post-treatment. In conclusion, the application of BTH treatment can effectively enhance the accumulation of polyphenols and intensify the color of Cabernet Gernischt and Cabernet Franc grapes, thereby significantly improving the overall quality of wine grapes and ensuring the production of higher-quality wines. The research findings will serve as a theoretical foundation and provide scientific data for the appropriate utilization of BTH in wine grape cultivation.
Share and Cite
MDPI and ACS Style
Wang, H.; Ma, T.; Qiang, W.; Wang, B.; Jiang, Y.; Ma, T.; Zhang, B.
Canopy-Applied Benzothiadiazole (BTH) during the Pre-Harvest Period as a Tool to Increase Polyphenol Accumulation and Color Intensity in Cabernet Gernischt and Cabernet Franc. Agronomy 2024, 14, 1818.
https://doi.org/10.3390/agronomy14081818
AMA Style
Wang H, Ma T, Qiang W, Wang B, Jiang Y, Ma T, Zhang B.
Canopy-Applied Benzothiadiazole (BTH) during the Pre-Harvest Period as a Tool to Increase Polyphenol Accumulation and Color Intensity in Cabernet Gernischt and Cabernet Franc. Agronomy. 2024; 14(8):1818.
https://doi.org/10.3390/agronomy14081818
Chicago/Turabian Style
Wang, Hongjuan, Tongwei Ma, Wenle Qiang, Bo Wang, Yumei Jiang, Tengzhen Ma, and Bo Zhang.
2024. "Canopy-Applied Benzothiadiazole (BTH) during the Pre-Harvest Period as a Tool to Increase Polyphenol Accumulation and Color Intensity in Cabernet Gernischt and Cabernet Franc" Agronomy 14, no. 8: 1818.
https://doi.org/10.3390/agronomy14081818
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