TY - JOUR
T1 - Comparison of Structural and Functional Properties of Wheat Starch under Different Soil Drought Conditions
AU - Zhang, Weiyang
AU - Gu, Junfei
AU - Wang, Zhiqin
AU - Wei, Cunxu
AU - Yang, Jianchang
AU - Zhang, Jianhua
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China [grant numbers 31461143015, 31471438], the National Key Technology Support Program of China [grant number 2014AA10A605], the National Key Research and Development Program of China [grant number 2016YFD0300206-4], the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), Jiangsu Creation Program for Post-graduation Students [grant number KYLX16_1398], the Top Talent Supporting Program of Yangzhou University [grant number 2015-01].
PY - 2017/12/1
Y1 - 2017/12/1
N2 - Drought influences cereal crop yield and quality. However, little is known about changes in the structural and functional properties of wheat starch under soil drought conditions. In this study, two wheat cultivars were subjected to well-watered (WW), moderate soil-drought (MD), and severe soil-drought (SD) from 7 tillers in the main stem to maturity. The structural and functional properties of the resultant endosperm starch were investigated. In comparison with WW soil, the MD increased starch accumulation in grains, the proportion of large starch granules, amylose and amylopectin long branch chain contents, and average amylopectin branch chain length, which were accompanied by the increase in activities of granule bound starch synthase and soluble starch synthase. MD treated-starch had a lower gelatinization enthalpy, and swelling power, but a higher gelatinization temperature, retrogradation enthalpy, and retrogradation percentage when compared to WW conditions. The MD also increased starch resistance to acid hydrolysis, amylase hydrolysis, and in vitro digestion. The SD had the opposite effects to the MD in all cases. The results suggest that soil drought more severely affects amylose synthesis than amylopectin synthesis in wheat grains, and moderate soil-drought improves molecular structure and functional properties of the starch.
AB - Drought influences cereal crop yield and quality. However, little is known about changes in the structural and functional properties of wheat starch under soil drought conditions. In this study, two wheat cultivars were subjected to well-watered (WW), moderate soil-drought (MD), and severe soil-drought (SD) from 7 tillers in the main stem to maturity. The structural and functional properties of the resultant endosperm starch were investigated. In comparison with WW soil, the MD increased starch accumulation in grains, the proportion of large starch granules, amylose and amylopectin long branch chain contents, and average amylopectin branch chain length, which were accompanied by the increase in activities of granule bound starch synthase and soluble starch synthase. MD treated-starch had a lower gelatinization enthalpy, and swelling power, but a higher gelatinization temperature, retrogradation enthalpy, and retrogradation percentage when compared to WW conditions. The MD also increased starch resistance to acid hydrolysis, amylase hydrolysis, and in vitro digestion. The SD had the opposite effects to the MD in all cases. The results suggest that soil drought more severely affects amylose synthesis than amylopectin synthesis in wheat grains, and moderate soil-drought improves molecular structure and functional properties of the starch.
UR - http://www.scopus.com/inward/record.url?scp=85030085673&partnerID=8YFLogxK
U2 - 10.1038/s41598-017-10802-3
DO - 10.1038/s41598-017-10802-3
M3 - Journal article
C2 - 28951617
AN - SCOPUS:85030085673
SN - 2045-2322
VL - 7
JO - Scientific Reports
JF - Scientific Reports
IS - 1
M1 - 12312
ER -