Multi-scale structural and functional enhancement of starch in sweet potato anthocyanin biosynthesis-deficient mutant: Insights into mechanisms and food applications
文献类型： 外文期刊
作者： Guo, Ke 1 ; Liu, Shuai 1 ; Liu, Xingxun 2 ; Zhang, Qian 1 ; Zhong, Yuyue 3 ; Yu, Yang 1 ; Ma, Peiyong 1 ; Alfredo, Morales Rodriguez 4 ; Jia, Zhaodong 1 ; Bian, Xiaofeng 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Food Crops, Nanjing 210014, Peoples R China
2.Nanjing Univ Finance & Econ, Coll Food Sci & Engn, Collaborat Innovat Ctr Modern Grain Circulat & Saf, Lab Food Soft Matter Struct & Adv Mfg, Nanjing 210023, Peoples R China
3.Hong Kong Polytech Univ, Dept Food Sci & Nutr, Kowloon, Hong Kong, Peoples R China
4.Res Inst Trop Roots & Tuber Crops INIVIT, Ctr Trop Crop Res, Santo Domingo, Cuba
关键词： Sweet potato; Starch; Multi-scale structure
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）
ISSN： 0141-8130
年卷期： 2025 年 318 卷
页码：
收录情况： SCI
摘要： The relationship between anthocyanins and starch biosynthesis in sweet potato root tubers is not well understood, primarily due to the genetic complexity of hexaploid genomes and the scarcity of appropriate genetic materials. To fill this knowledge gap, the purple-fleshed sweet potato cultivars Ningzishu 4 and Ningzishu 1, along with their naturally occurring anthocyanin-deficient yellow-fleshed mutant were employed for comparative analyzes while eliminating interference from genotypic background variations. In the mutant, the levels of soluble sugars, starch, amylose, and amylopectin A and B3+ chains increased, although starch morphology and crystalline type remained unaffected. Alternatively, the granule size, relative crystallinity, and lamellar peak intensity decreased. These changes can be attributed to the differential expression levels of starch biosynthesis related genes. Furthermore, the starches in the mutant displayed modified gelatinization, viscosity, and digestion characteristics. This study established a metabolic connection between anthocyanin and starch metabolism using natural mutants, offering insights for enhancing sweet potato quality traits and developing functional starch varieties via targeted breeding approaches.
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