中国农业气象 ›› 2022, Vol. 43 ›› Issue (02): 93-111.doi: 10.3969/j.issn.1000-6362.2022.02.002

• 农业生物气象栏目 • 上一篇    下一篇

提高小麦光能利用效率机理的研究进展

李义博,陶福禄   

  1. 中国科学院地理科学与资源研究所/中国科学院陆地表层格局与模拟重点实验室/中国科学院大学,北京 100049
  • 收稿日期:2021-06-09 出版日期:2022-02-20 发布日期:2022-01-15
  • 通讯作者: 陶福禄,博士,研究员,主要从事生态系统与全球变化生态学研究,E-mail: taofl@igsnrr.ac.cn E-mail:taofl@igsnrr.ac.cn
  • 作者简介:李义博,E-mail: lybmails@163.com
  • 基金资助:
    国家自然科学基金项目“提升小麦光利用效率和产量潜力的生理遗传基础与理想株型设计研究”(3176113006)

Research Progress on the Mechanism of High Light Use Efficiency in Wheat

LI Yi-bo, TAO Fu-lu   

  1. Institute of Geographic Sciences and Natural Resources Research/Key Laboratory of Land Surface Pattern and Simulation/China University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-06-09 Online:2022-02-20 Published:2022-01-15

摘要: 农作物产量依赖于生物量和收获指数,过去作物产量的增加主要得益于收获指数的增加而生物量增加很小,进一步提升作物产量在很大程度上依赖于生物量的提高,而光能利用效率是提高作物生物量的瓶颈。小麦(Triticum aestivum L.)是一种在全世界广泛种植的谷类作物,可为全世界人口提供约20.0%的能量,阐明小麦光能利用效率变化的内在机理与外在因素,对提高作物资源利用效率和生产力有重要意义。本文对光能利用效率的定义、主要过程、小麦的光能利用特性和内外影响因素进行综述,表明提高光能利用效率具有较大的潜力;论述了外部因素,即光、水分、养分和耕作制度等对小麦光能利用效率的影响,主要表现为在单株尺度上主要由光合作用等内部因素控制,而在田间尺度则由温度、降水、耕作栽培方式等非生物因素控制。进一步分析了目前存在的问题以及在气候变化背景下小麦的适应机制,旨在为提升小麦光能利用效率提供理论依据。未来光能利用效率的研究可利用高通量表型观测技术,与分子标记结合,设计在目标环境下的具有高光能利用效率的理想株型,为培育高产高效小麦品种提供科学依据。

关键词: 小麦, 气候变化, 光能利用效率, 理想株型, 产量潜力

Abstract: Crop yield is dependent on crop biomass and harvest index. The increases in crop yield in the past benefit mainly from the increase in harvest index, the increase in biomass has been small. Light use efficiency is a bottleneck to further increase crop biomass and yield. Wheat (Triticum aestivum L.) is a widely cultivated cereal crop globally, providing energy to up to 20% of the world's population. It is necessary to reveal the intrinsic mechanism and extrinsic factors affecting the light use efficiency of wheat, which is important for improving the utilization efficiency of crop resources and productivity. Achieving high light efficient production of wheat under limited natural resources has become the focus of study at home and abroad. Here, the definition of light use efficiency, the main processes, the characteristics of light use efficiency in wheat were summarized from relevant references, showing a more significant potential to improve light use efficiency. The effects of external factors such as light, water, nutrient and tillage system on wheat light use efficiency were summarized. The results indicated that light use efficiency was regulated by internal factors such as photosynthesis at the individual plant scale, and by abiotic factors such as temperature, precipitation and tillage practices at the field scale. The current problems and the adaptation mechanism of wheat in the context of climate change were also analyzed, aiming to provide a theoretical reference for the practical research of the high light use efficiency of wheat. Future research on light use efficiency can use high-throughput phenotypic observation techniques combined with molecular markers to design ideotypes in the target environment, providing scientific evidence for crop breeding.

Key words: Wheat, Climate change, Light use efficiency, Ideotypes, Yield potential