Singer Stacy D, Chatterton Syama, Soolanayakanahally Raju Y, Subedi Udaya, Chen Guanqun, Acharya Surya N
Agriculture and Agri-Food Canada Lethbridge Research and Development Centre Lethbridge AB Canada.
Agriculture and Agri-Food Canada Saskatoon Research and Development Centre Saskatoon SK Canada.
Plant Environ Interact. 2020 Apr 24;1(2):67-94. doi: 10.1002/pei3.10009. eCollection 2020 Sep.
Legumes provide an important source of food and feed due to their high protein levels and many health benefits, and also impart environmental and agronomic advantages as a consequence of their ability to fix nitrogen through their symbiotic relationship with rhizobia. As a result of our growing population, the demand for products derived from legumes will likely expand considerably in coming years. Since there is little scope for increasing production area, improving the productivity of such crops in the face of climate change will be essential. While a growing number of studies have assessed the effects of climate change on legume yield, there is a paucity of information regarding the direct impact of elevated CO concentration (e[CO]) itself, which is a main driver of climate change and has a substantial physiological effect on plants. In this review, we discuss current knowledge regarding the influence of e[CO] on the photosynthetic process, as well as biomass production, seed yield, quality, and stress tolerance in legumes, and examine how these responses differ from those observed in non-nodulating plants. Although these relationships are proving to be extremely complex, mounting evidence suggests that under limiting conditions, overall declines in many of these parameters could ensue. While further research will be required to unravel precise mechanisms underlying e[CO] responses of legumes, it is clear that integrating such knowledge into legume breeding programs will be indispensable for achieving yield gains by harnessing the potential positive effects, and minimizing the detrimental impacts, of CO in the future.
由于蛋白质含量高且具有诸多健康益处，豆类是重要的食物和饲料来源。此外，豆类通过与根瘤菌的共生关系固氮，还具有环境和农艺优势。随着人口增长，未来几年对豆类衍生产品的需求可能会大幅增加。由于扩大种植面积的空间有限，面对气候变化提高此类作物的生产力至关重要。虽然越来越多的研究评估了气候变化对豆类产量的影响，但关于二氧化碳浓度升高（e[CO]）本身的直接影响的信息却很少，而二氧化碳浓度升高是气候变化的主要驱动因素，对植物具有重大生理影响。在本综述中，我们讨论了关于e[CO]对豆类光合作用过程、生物量生产、种子产量、品质和胁迫耐受性的影响的现有知识，并研究了这些反应与非结瘤植物的反应有何不同。尽管这些关系极其复杂，但越来越多的证据表明，在有限条件下，这些参数中的许多可能会整体下降。虽然需要进一步研究来揭示豆类对e[CO]反应的精确机制，但很明显，将这些知识整合到豆类育种计划中对于未来通过利用二氧化碳的潜在积极影响并尽量减少其不利影响来实现产量增长将是不可或缺的。
