文献类型： 外文期刊

作者： Su, Xuexia ¹ ; Bai, Cuihua ¹ ; Wang, Xianghe ³ ; Liu, Huilin ¹ ; Zhu, Yongcong ¹ ; Wei, Leping ⁴ ; Cui, Zixiao ¹ ; Yao, Lixian ¹ ;

作者机构： 1.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou, Peoples R China

2.Guangdong Prov Key Lab Agr & Rural Pollut Abatemen, Guangzhou, Peoples R China

3.Hainan Acad Agr Sci, Inst Trop Fruit Trees, Haikou, Peoples R China

4.South China Agr Univ, Coll Arts, Guangzhou, Peoples R China

关键词： pigmentation; HSB color model; anthocyanin; pericarp acidity; foliar spray; lychee

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：6.627； 五年影响因子：7.255 ）

ISSN： 1664-462X

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Fruit color is a decisive factor in consumers' preference. The bright red color of litchi fruit is associated with its high anthocyanin; however, poor fruit coloration is a major obstacle in litchi plantation. The role of spraying mineral nutrient salts such as KH2PO4, KCl, K2SO4, and MgSO4 on litchi pericarp pigmentation was examined by a field trial, and the relation between human visual color preference versus pericarp pigments and hue-saturation-brightness (HSB) color parameters was investigated. K2SO4-sprayed litchi fruit gained the maximum popularity for its attractive red color. Spray of K and Mg salts decreased the buildup of yellowish pigments, but increased the accumulation of red ones, with the exception of slightly reduced anthocyanins in KH2PO4-sprayed fruit, by regulating the activities of enzymes involved in anthocyanidin metabolism and decreasing pericarp pH, leading to varied pericarp pigment composition. K2SO4 spray generated the highest percentage of cyanidin-3-glucoside over all pigments in pericarp. Correlation analysis shows the percent of cyanidin-3-glucoside, superior to anthocyanin concentration and HSB color parameters, was a reliable indicator to fruit color preference. This work demonstrates that spray of suitable mineral salt can regulate pericarp pigment profile, and is an effective approach to improve fruit pigmentation and promote its popularity.