期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 164, 期 -, 页码 3235-3242出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2020.08.199
关键词
Sweet potato; Nitrogen fertilizer; Starch; Structural properties; Functional properties
资金
- National Natural Science Foundation of China [31570324]
- Jiangsu Agricultural Science and Technology Innovation Fund [CX18-3011]
- Talent Project of Yangzhou University
- Priority Academic Program Development of Jiangsu Higher Education Institutions
The nitrogen (N) influences the growth of sweet potato. However, it is unclear whether the different levels of N can affect starch physicochemical properties. In this study, 9 different colored-fleshed sweet potato varieties were planted in the same field with additional N fertilizer treatment of 0, 15 and 30 kg/ha. The physicochemical properties of starches from root tubers were measured. With increasing N level, the amylose content decreased in yellow-fleshed variety Sushu 16 and increased in white-fleshed variety Sushu 29 and purple-fleshed varieties Ningzishu 1 and 4, but did not significantly change in other varieties. The starch size decreased in purple-fleshed variety Ningzishu 1 and white-fleshed varieties Sushu 28 and Sushu 29 with increasing N treatment, but first increased then decreased in yellow-fleshed variety Sushu 16 and first decreased then increased in white-fleshed variety Sushu 24 and yellow-fleshed variety Sushu 25. The different levels of N treatment had no influence on protein content, crystalline structure, and gelatinization enthalpy of starch. The effects of N treatment on gelatinization temperatures and pasting viscosities of starches were determined by varieties and genotype backgrounds of sweet potato. The PLSR and PLS-DA were also carried out based on structural, thermal, and pasting parameters of starches. (C) 2020 Published by Elsevier B.V.
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