Starch and Dough-Related Properties of Wheat (<i>Triticum aestivum</i> L.) Exposed to Varying Temperatures and Radiances after Anthesis

Abstract

With the increase in global warming and solar radiation, the starch quality and dough properties of wheat have also been affected to some negative extent. To prepare for the effects of future climate change, we explored the effects of different temperatures and radiation on the properties of wheat starch and dough. Six sowing dates for four wheat varieties were selected for this study. The seedling population on the first sowing date (S1) was 300 × 104 plants ha−1, which increased by approximately 10% after the subsequent sowing date. The results showed that a delay in sowing time increased the daily mean temperature after anthesis and decreased the effective accumulated temperature and cumulative solar radiation. When the daily mean temperature increased 0.32 °C after anthesis, the total starch content decreased 1.2%, the sedimentation value increased by 14.19 s, the water absorption increased 0.62%, the dough development time increased 0.4 min, and the dough stability time increased 0.28 min. The gelatinization and dough properties of wheat starch were not only related to the daily mean temperature, but were also significantly related to the effective accumulated temperature and cumulative solar radiation. The results showed that the starch and dough properties of wheat are also related to the cumulative radiation temperature after anthesis. Compared with radiation, temperature is the main climatic factor affecting the formation of wheat starch and dough.

Keywords

• temperature
• radiation
• wheat starch
• dough property