Root architecture and hydraulics converge for acclimation to changing water availability

编号 040025201

推送时间 20200817

研究领域 森林培育 

年份 2020 

类型 期刊 

语种 英语

标题 Root architecture and hydraulics converge for acclimation to changing water availability

来源期刊 Nature Plants

期 第252期

发表时间 20200629

关键词 hydraulics;  roots achieve;  water availability;  root hydraulic architecture; 

摘要 Because of intense transpiration and growth, the needs of plants for water can be immense. Yet water in the soil is most often heterogeneous if not scarce due to more and more frequent and intense drought episodes. The converse context, flooding, is often associated with marked oxygen deficiency and can also challenge the plant water status. Under our feet, roots achieve an incredible challenge to meet the water demand of the plant’s aerial parts under such dramatically different environmental conditions. For this, they continuously explore the soil, building a highly complex, branched architecture. On shorter time scales, roots keep adjusting their water transport capacity (their so-called hydraulics) locally or globally. While the mechanisms that directly underlie root growth and development as well as tissue hydraulics are being uncovered, the signalling mechanisms that govern their local and systemic adjustments as a function of water availability remain largely unknown. A comprehensive understanding of root architecture and hydraulics as a whole (in other terms, root hydraulic architecture) is needed to apprehend the strategies used by plants to optimize water uptake and possibly improve crops regarding this crucial trait.

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