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Physiological studies on anthocyanin accumulation, quality and yield of purple sweet potato tubers with different forms of potassium fertilizer

文献类型： 外文期刊

作者： Huang, Jingwei 1 ; Wang, Qiang 4 ; Qiu, Qingcheng 6 ; Zou, Liang 1 ; Shen, Xueshan 3 ; Wan, Yan 1 ; Qu, Huijuan 3 ;

作者机构： 1.Chengdu Univ, Sichuan Engn & Technol Res Ctr Coarse Cereal Indus, Sch Food & Biol Engn, Key Lab Coarse Cereal Proc ,Minist Agr & Rural Aff, Chengdu 610106, Sichuan, Peoples R China

2.Chengdu Univ, Sch Preclin Med, Chengdu 610106, Peoples R China

3.Sichuan Acad Agr Sci, Biotechnol & Nucl Technol Res Inst, Chengdu 61066, Peoples R China

4.Jilin Agr Univ, Agron Coll, Changchun 130118, Jilin, Peoples R China

5.Baicheng Acad Agr Sci, Baicheng 137000, Jilin, Peoples R China

6.Hunan Agr Univ, Agron Coll, Changsha 410125, Hunan, Peoples R China

关键词： Purple sweet potato; Potassium fertilizer; Anthocyanin biosynthesis; Quality and yield

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2025 年 343 卷

页码：

收录情况： SCI

摘要： Purple sweet potato (PSP) is a nutrient-rich, potassium-favoring grain crop. The judicious application of potassium fertilizer significantly influences the quality and yield of PSP tubers. We conducted two years of field experiments to scientifically determine the optimal types of potassium fertilizers and enhance the quality and efficiency of PSP production. Using no potassium fertilizer as the control (CK), we established four treatments: KCl, K2SO4, K2HPO4, and KH2PO4. The results indicate that different forms of potassium fertilizer enhance the activity of key anthocyanin synthases, including phenylalanine ammonia-lyase (PAL, EC 4.3.1.5), chalcone isomerase (CHI, EC 5.5.1.6), dihydroflavonol 4-reductase (DFR, EC 1.1.1.219), and UDP-galactose flavonoid 3-Ogalactosyltransferase (UFGT, EC 2.4.1.91), thereby increasing the anthocyanin content of the tubers. Furthermore, these fertilizers can enhance the quality and yield of PSP tubers to a certain extent. We further combined hierarchical clustering, principal component analysis (PCA), and comprehensive fuzzy mathematics evaluation. Our results indicate that the anthocyanin content, accumulation, yield, and quality composition indicators of "Mianzishu No.9 '' are more sensitive to KCl than to other potassium fertilizers. This suggests that using KCl as a potassium fertilizer is more conducive to the actual production of PSP. This study is the first to analyze the impact of different forms of potassium fertilizers on the biosynthesis of PSP anthocyanins and the research results further elucidate the applicability of KCl in sustainable agricultural practices.

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