摘要
在传统间套作基础上发展而来的"玉米-大豆带状复合种植"模式,能显著提高土地产出率,在不降低玉米的产出基础上净增加大豆产量,在中国西南地区得到了快速发展。但是,在该模式下,高位作物玉米对低位作物大豆形成荫蔽胁迫,限制了该模式的进一步推广。荫蔽胁迫下,红光/远红光比值(R:FR)下降,大豆的光能截获量显著减少,植株表现出下胚轴纤细、叶面积减小、叶柄细长、叶片变薄、易倒伏等典型的荫蔽胁迫表型,极大地限制了间套作大豆的产量和品质提升。因此,在生理和分子水平上研究大豆对荫蔽胁迫的响应机理,培育耐荫大豆品种,对指导间套作大豆生产具有理论和现实意义。本综述研究了农业生产中的荫蔽胁迫,荫蔽对间套作大豆农艺性状、光合作用及倒伏的影响,同时阐述了大豆响应荫蔽胁迫的生理及分子机制;并在此基础上,探讨了本领域未来的主要研究方向。
Based on the traditio nal intercropping, the maize-soybean relay intercropping system significantly improves land equivalent ratio and increases soybean production without reducing corn output. It has developed rapidly in the southwest of China. However, under this pattern, the competition for limited light resource can resulted in shade avoidance response in soybean. Most of all, the ratio of Red： Far Red（R：FR） reduced under the maize-soybean relay intercropping system. Furthermore, the light interception of soybean decreased significantly,and those made soybean show typical shade response phenotypes including longer and thinner hypocotyl, smaller leaf area, longer petious and thinner leaves, and prone to lodging. The phenotypes remarkably constrained the yield and quality improvement of intercropping soybean system. Consequently, it is important to investigate and understand the physiological and molecular mechanisms underlying soybean responses to shade stress. The cultivation of shade tolerant soybean varieties had theoretical and practical significance for guiding intercropping and interplanting soybean production. In this updated review, we summarized the recent progresses about the effect of shade stress on diverse agronomy traits, photosynthesis and lodging in soybean, and expressed the responsiveness of soybean to shade stress at physiological and mole cular levels. This review wi ll provide majordirections for future research in this field.
作者
罗晓峰
孟永杰
刘卫国
杨文钰
舒凯
Luo Xiaofeng, Meng Yongjie ,Liu Weiguo ,Yang Wenyu, Shu Kai(Key Laboratory of Crop Ecophysiology and Farming System in Southwest China, Ministry of Agriculture, Institute of Ecological Agriculture, Sichuan Agricultural University, Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, 611130)
出处
《分子植物育种》
CAS
CSCD
北大核心
2018年第3期979-988,共10页
Molecular Plant Breeding
基金
国家重点研发计划(2017YFD0201306)
中国博士后科学基金(2014M552377
2016T90868)
四川省教育厅基金(16ZB0040)共同资助
关键词
荫蔽
大豆
间套作
生理
Shade, Soybean, Relay intercropping, Physiological
