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Effects of Reduced Nitrogen Fertilization and Irrigation on Structure and Physicochemical Properties of Starch in Two Bread Wheat Cultivars

Author

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  • Jingyang Tong

    (National Wheat Improvement Center, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China)

  • Shujun Wang

    (State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China)

  • Zhonghu He

    (National Wheat Improvement Center, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
    International Maize and Wheat Improvement Center (CIMMYT) China Office, Beijing 100081, China)

  • Yan Zhang

    (National Wheat Improvement Center, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China)

Abstract

Nitrogen (N) fertilization and irrigation are significant agronomic factors affecting wheat production, but little information is available on the effects of reduced N fertilization and irrigation on internal starch structure and physicochemical properties associated with the quality of wheat-based foods. In this study, reduced N fertilization and irrigation were separately applied to investigate their effects on composition and morphological changes, crystalline and external region structure features, swelling power, and gelatinization characteristics of starch granules in bread wheat, with a high N-use-efficiency and water-saving wheat cultivar Zhongmai 175 and a widely grown cultivar Jingdong 17. Compared with a non-N control, reduced N fertilization did not change the crystallinity type and short-range ordered degree of starch; however, it significantly increased relative crystallinity, swelling power and gelatinization enthalpy, whereas amylose content and transition temperatures were decreased. Under reduced irrigation, more small starch granules with compact arrangements appeared in comparison with non-water control. Relative crystallinity, swelling power and gelatinization enthalpy of starch were increased, whereas short-range ordered degree and transition temperatures were decreased. Moreover, the starch of the two cultivars appeared to differ in response to both the N and water treatments. The findings indicated that reduced N fertilization or irrigation markedly influenced the structure and physicochemical characteristics of wheat starch, providing important information for developing elite cultivars with high N and water use efficiency and outstanding starch quality.

Suggested Citation

  • Jingyang Tong & Shujun Wang & Zhonghu He & Yan Zhang, 2021. "Effects of Reduced Nitrogen Fertilization and Irrigation on Structure and Physicochemical Properties of Starch in Two Bread Wheat Cultivars," Agriculture, MDPI, vol. 11(1), pages 1-12, January.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:1:p:26-:d:473967
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    1. Yan, Shicheng & Wu, You & Fan, Junliang & Zhang, Fucang & Qiang, Shengcai & Zheng, Jing & Xiang, Youzhen & Guo, Jinjin & Zou, Haiyang, 2019. "Effects of water and fertilizer management on grain filling characteristics, grain weight and productivity of drip-fertigated winter wheat," Agricultural Water Management, Elsevier, vol. 213(C), pages 983-995.
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    Cited by:

    1. Zhongmin Dai & Dongcheng Liu & Shengnan Qin & Rugang Wu & Yan Li & Juan Liu & Yuangang Zhu & Guangfeng Chen, 2021. "Effects of irrigation schemes on the components and physicochemical properties of starch in waxy wheat lines," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 67(9), pages 524-532.

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