Physicochemical Properties of Wheat Starch under Different Sowing Dates

Abstract

AbstractDifferent sowing dates mainly influence the growth of wheat by changing the insolation duration and accumulated temperature. But the underlying mechanism of the accumulation of the wheat starch from different sowing dates is still unclear. This field study is conducted to determine the relationship between the physicochemical properties of wheat starch and the sowing date. Results show that the accumulation of amyloplasts is greatly affected by sowing date. With the postponement of sowing time, the content of A‐type granules in grains significantly increases and C‐type granules decreases. Delaying the sowing date significantly decreases the content of amylose. The swelling power and solubility show a downward trend, but no significant difference among groups. The long‐chain content of amylopectin increases with the postponement of sowing date. The crystal structure and resistant starch increase as well. However, those increasing effects are not infinite, they will gradually weaken and disappear when the sowing date is continued to be postponed.