数字农科院2.0

Respiration, Rather Than Photosynthesis, Determines Rice Yield Loss Under Moderate High-Temperature Conditions

文献类型： 外文期刊

作者： Guangyan Li;Tingting Chen;Baohua Feng;Shaobing Peng;Longxing Tao;Guanfu Fu

作者机构：

关键词： energy utilization efficiency;high temperature;photosynthesis;respiration;smart crops breeding;yield loss

期刊名称： Frontiers in Plant Science

ISSN： 1664-462X

年卷期： 2021 年 12.0 卷

页码：

收录情况： JCR（2021版）

摘要： Photosynthesis is an important biophysical and biochemical reaction that provides food and oxygen to maintain aerobic life on earth. Recently, increasing photosynthesis has been revisited as an approach for reducing rice yield losses caused by high temperatures. We found that moderate high temperature causes less damage to photosynthesis but significantly increases respiration. In this case, the energy production efficiency is enhanced, but most of this energy is allocated to maintenance respiration, resulting in an overall decrease in the energy utilization efficiency. In this perspective, respiration, rather than photosynthesis, may be the primary contributor to yield losses in a high-temperature climate. Indeed, the dry matter weight and yield could be enhanced if the energy was mainly allocated to the growth respiration. Therefore, we proposed that engineering smart rice cultivars with a highly efficient system of energy production, allocation, and utilization could effectively solve the world food crisis under high-temperature conditions.

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