Starch Granule Size Distribution and Pasting Characteristic Response to Post-Anthesis Combined Stress of Waterlogging and Shading

Huawei Li, Zongshuai Wang, Qicui Zhuo, Bin Zhang, Fahong Wang and Dong Jiang
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Huawei Li: Crop Research Institute, Shandong Academy of Agricultural Science, Jinan 250100, China
Zongshuai Wang: Crop Research Institute, Shandong Academy of Agricultural Science, Jinan 250100, China
Qicui Zhuo: Crop Research Institute, Shandong Academy of Agricultural Science, Jinan 250100, China
Bin Zhang: Crop Research Institute, Shandong Academy of Agricultural Science, Jinan 250100, China
Fahong Wang: Crop Research Institute, Shandong Academy of Agricultural Science, Jinan 250100, China
Dong Jiang: National Technique Innovation Center for Regional Wheat Production/Key Laboratory of Crop Physiology and Ecology in Southern China, Ministry of Agriculture/National Engineering and Technology Center for Information Agriculture, Nanjing Agricultural University, Nanjing 210095, China

Agriculture, 2020, vol. 10, issue 9, 1-13

Abstract: The combined stress of waterlogging and shading (WS) caused by continuous rain threatens the production of high-quality weak gluten wheat in China ( Triticum aestivum L.). To evaluate its influences on wheat quality formation, Yangmai 158 was chosen to be subjected to WS at 0–7 days after anthesis (DAA, WS 0–7 ), 8–15 DAA (WS 8–15 ), 16–23 DAA (WS 16–23 ), and 24–31 DAA (WS 24–31 ), respectively, with non-stressed plants as control (Non-WS). Compared with Non-WS, WS reduced the amylopectin content and enhanced amylose content in the mature grains. WS enhanced the number and surface but reduced the size of the starch granules. The number, volume, and surface area percentages of B-type starch granules were enhanced, and the number and volume percentages of A-type starch granules were reduced by WS. The peak viscosity and gelatinization temperature were enhanced and the low viscosity and final viscosity were decreased by WS. WS applied at the mid-grain-filling stage (WS 8–15 and WS 16–23 ) had greater modification on the starch content, granule size distribution and pasting characteristics than that applied at early (WS 0–7 ) or late (WS 24–31 ). The changes of starch pasting characteristics under WS had a significant correlation with the amylase and amylopectin content, amylase/amylopectin, and the ratio of the volume percent of B-type and A-type starch granules.

Keywords: wheat; starch quality; starch granule size distribution characteristic; starch pasting characteristic (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
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