Investigating the Effect of Two Interstocks, Changshanhuyou and Ponkan, on the Fruit Quality and Volatile Flavor of Cocktail Grapefruit (Citrus paradisi Macf. cv. Cocktail)

文献类型： 外文期刊

第一作者： Ke, Fuzhi

作者： Ke, Fuzhi;Nie, Zhenpeng;Huang, Xiu;Cui, Changjiang;Yang, Yi;Xu, Jianguo;Wang, Luoyun;Sun, Lifang;Ke, Fuzhi;Nie, Zhenpeng;Huang, Xiu;Cui, Changjiang;Yang, Yi;Xu, Jianguo;Wang, Luoyun;Sun, Lifang

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关键词： cocktail grapefruit; interstock; graft; fruit quality; volatile flavor

期刊名称：HORTICULTURAE （ 影响因子：3.0； 五年影响因子：3.2 ）

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年卷期： 2025 年 11 卷 4 期

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收录情况： SCI

摘要： Citrus cultivars are propagated asexually through methods such as layering, cutting, and grafting. Grafting plays a critical role in regulating citrus fruit quality by optimizing stock-scion combinations. This study evaluated the grafting compatibility of two interstocks with Cocktail grapefruits (Citrus paradisi Macf. cv. Cocktail) by analyzing physiological and volatile traits of the fruits. We used Changshanhuyou (Citrus paradisi cv. Changshanhuyou) and Ponkan (Citrus reticulata Blanco cv. Ponkan), which are traditional citrus varieties in Quzhou, Zhejiang Province, as interstocks. Our results showed that the grapefruit fruits grafted onto Changshanhuyou exhibited higher total soluble solids (12.3 degrees Brix) and a brighter, more uniform peel color. The acidity of fruits grafted onto Changshanhuyou was lower than that of fruits grafted onto Ponkan and similar to the fruits from the control group that were grafted directly onto trifoliate orange. In terms of volatile organic compounds (VOCs), 974 and 577 unique VOCs were identified in the peel and pulp, respectively. In the peel, 34 (26 upregulated and 8 downregulated) and 14 (13 upregulated and 1 downregulated) differentially accumulated VOCs were identified when comparing the trifoliate orange group with Changshanhuyou and Ponkan groups, respectively. The pulp exhibited greater VOC diversity, with 272 (24 upregulated and 248 downregulated) and 199 (4 upregulated and 195 downregulated) differentially accumulated VOCs detected for the same comparisons. In conclusion, compared with direct grafting onto trifoliate orange or on Ponkan as an interstock, grafting onto Changshanhuyou resulted in better fruit quality and distinct differences in flesh flavor. These findings suggest that Changshanhuyou is a more suitable interstock for Cocktail grapefruit (Citrus paradisi Macf. cv. Cocktail) cultivation.

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