关键词: 温度, 非结构碳水化合物, 小麦, 产量与品质

Abstract:

Environmental temperature influences the carbon and nitrogen metabolis process and changes the growth rhythms of plants. Advances in photosynthetic rate, sucrose synthesis in leaves, nonstructural carbohydrates metabolism in sheath and stems, and starch synthesis rate in kernels of wheat and their responses to temperature were reviewed. It was concluded that kernel weight and yield would decrease when the temperature is above 30 ℃. Wheat quality is determined by the characteristics of gluten protein. We summarized some advances in protein formation, contents and components of wheat kernel and their relationships with temperature. According to the changes in gluten protein under different temperatures, the bake quality of wheat would become worse under heat stress. Global warming would enlarge the heat stress during the filling stage of wheat, and three suggestions were made for further research in this field: 1) studies on the co_influence of CO2 concentration and temperature evaluation on wheat yield and quality; 2) studies on the physiological mechanism of heat tolerance and planting regulation; 3) Identify the heat tolerant gene and breed heat tolerant cultivars.

Key words: Temperature, Nonstructural carbohydrates, Wheat;Yield and quality