Ji Wenbin, Hu Xinyi, Kang Meng, Qiu Xiaolei, Liu Bing, Tang Liang, Zhu Yan, Cao Weixing, Liu Leilei
Key Laboratory for Crop System Analysis and Decision Making, National Engineering and Technology Center for Information Agriculture, Engineering Research Center of Smart Agriculture, Jiangsu Collaborative Innovation Center for Modern Crop Production, Ministry of Education, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China.
Jiangsu Key Laboratory for Information Agriculture, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, China.
Front Plant Sci. 2023 Jul 27;14:1221466. doi: 10.3389/fpls.2023.1221466. eCollection 2023.
The nutritional value of wheat is important to human health. Despite minerals being essential nutrients for the human body, they are often neglected in consideration of the nutritional quality of cereal grains. Extreme low-temperature events have become more frequent due to the current environmental unpredictability, and it is yet unknown how the mineral components in grains are affected by low temperature.
To provide valuable information for enhancing the nutritional quality of wheat under potential climatic conditions, we treated different cold-sensitive wheat cultivars at four low-temperature levels during the individual and combined stages of jointing and booting in controlled-environment phytotrons.
In general, the contents of P, K, Ca, and Zn in the cold-sensitive cultivar (Yangmai16) and K in the cold-tolerant cultivar (Xumai30) were enhanced by low temperature. However, the accumulation of minerals in mature grains was reduced under low-temperature treatment, except for P, Ca, and Zn in Yangmai16. In addition, the mineral content and accumulation in Yangmai16 (except for Fe) were more susceptible to low temperature during the combined stages, while the mineral content and accumulation of K, Fe, and Zn in Xumai30 were more susceptible to low temperature during the booting stage. Moreover, Yangmai16 under extremely low temperatures (T3 and T4) during booting and Xumai30 under all low-temperature treatments during the combined stages had lower comprehensive evaluation values. These findings offer a crucial reference for enhancing the nutritional quality of wheat grains under climate change.
小麦的营养价值对人类健康至关重要。尽管矿物质是人体必需的营养素，但在考虑谷物的营养品质时，它们常常被忽视。由于当前环境的不可预测性，极端低温事件变得更加频繁，而谷物中的矿物质成分如何受到低温影响尚不清楚。
为了在潜在气候条件下为提高小麦的营养品质提供有价值的信息，我们在可控环境植物生长箱中，在拔节期和孕穗期的单独及联合阶段，对不同的冷敏感小麦品种进行了四个低温水平的处理。
总体而言，低温提高了冷敏感品种（扬麦16）中磷、钾、钙和锌的含量以及耐冷品种（徐麦30）中钾的含量。然而，除扬麦16中的磷、钙和锌外，低温处理下成熟籽粒中矿物质的积累减少。此外，扬麦16（铁除外）在联合阶段的矿物质含量和积累对低温更敏感，而徐麦30中钾、铁和锌的矿物质含量和积累在孕穗期对低温更敏感。此外，扬麦16在孕穗期处于极低温度（T3和T4）下以及徐麦30在联合阶段的所有低温处理下综合评价值较低。这些发现为气候变化下提高小麦籽粒的营养品质提供了关键参考。
