Opportunities for improving leaf water use efficiency under climate change conditions
Opportunities for improving leaf water use efficiency under climate change conditions
复制标题
DOI：
10.1016/j.plantsci.2014.04.007
复制
发表时间：
2014-09-01
期刊：
影响因子：
5.2
通讯作者：
Medrano, Hipolitd
中科院分区：
文献类型：
--
作者：
Gago, Jorge;Douthe, Cyril;Medrano, Hipolitd
WUEi（内在水分利用效率）是一种复杂的（多）性状，取决于多种生理过程，推动植物生产力及其与环境变化的关系。气候变化预测估计半干旱地区气温和干旱的增加，提高用水效率是维持当前全球粮食供应的强制性目标。本综述的目的是 (i) 通过荟萃分析确定与内在水分利用效率（WUEi，A 净光合作用与 g(s) - 气孔导度之间的比率）最相关的叶子性状，基于新编制的数据集，涵盖 200 多个物种/品种和 106 属的 C-3 植物 (ii) 描述通过生物技术改善 WUEi 的主要潜在目标 (iii) 引入包括无人机在内的新兴和创新技术，以提高从叶子到整个植物水分状况的水平。我们证实，g(m)/g(s) 和 V-cmax/g(s) 比率的增加与物种、栖息地和环境条件下维持的 WUEi 的增加系统相关。描述了改善 WUEi 的其他新兴机会，例如光合作用和呼吸之间的关系及其与代谢组学的联系。最后，我们概述了我们的假设，即我们正在观察“智能”农业的出现，其中新技术，例如配备远程传感器的无人机，将迅速促进高效用水，调节灌溉计划，并在田间条件下确定提高用水效率的品种。因此，我们得出结论，针对 WUE 的多学科挑战才刚刚开始。 (C) 2014 Elsevier Ireland Ltd. 保留所有权利。
WUEi (intrinsic water use efficiency) is a complex (multi)-trait, that depends on several physiological processes, driving plant productivity and its relation with a changing environment. Climatic change predictions estimate increases in temperature and drought in the semi-arid regions, rendering improved water use efficiency is a mandatory objective to maintain the current global food supply. The aims of this review were (i) to identify through a meta-analysis the leaf traits mostly related to intrinsic water use efficiency (WUEi, the ratio between A net photosynthesis and g(s) - stomatal conductance), based on a newly compiled dataset covering more than 200 species/varieties and 106 genus of C-3 plants (ii) to describe the main potential targets for WUEi improvement via biotechnological manipulations and (iii) to introduce emergent and innovative technologies including UAVs (Unmanned Aerial Vehicles) to scale up levels from leaf to whole plant water status. We confirmed that increases in g(m)/g(s) and V-cmax/g(s) ratios are systematically related with increases in WUEi maintained across species, habitats, and environmental conditions. Other emergent opportunities to improve WUEi are described such as the relationship between photosynthesis and respiration and their link with metabolomics. Finally, we outline our hypothesis that we are observing the advent of a "smart" agriculture, wherein new technologies, such as UAVs equipped with remote sensors will rapidly facilitate an efficient water use regulating the irrigation schedule and determination, under field conditions, of cultivars with improved water use efficiency. We, therefore, conclude that the multi-disciplinary challenge toward WUE has only just begun. (C) 2014 Elsevier Ireland Ltd. All rights reserved.