欧亚国际

来自比利时科学家，利用WIWAM大型植物表型成像系统发表了题为Drought affects the rate and duration of organ growth but not inter organ growth coordination的文章，文章发表在知名期刊Plant Physiology上。

Drought affects the rate and duration of organ growth but not inter organ growth coordination

March 2021Plant Physiology
DOI:10.1093/plphys/kiab155 

摘要 

开花期和灌浆期的干旱极大地降低了玉米（Zea mays）的产量。气候变化导致干旱持续时间提前和延长，从而影响玉米发育过程中多个器官的生长。为了研究长期缺水对生长动态的影响，为了确定这些与生殖干旱的关系，我们使用了一个高通量表型分析平台，该平台具有精确的灌溉、成像系统，可基于图像进行生物量估算。长期干旱导致单个器官的生长率降低，尽管生长持续时间的延长部分弥补了这一点，最终会导致生物量降低和开花延迟。但长期干旱不会影响不同器官，即叶、茎和穗的高度有序的最大生长速率演替。两种干旱处理对不同的种子产量构成负面影响：长期干旱主要减少小穗数量，生殖期干旱增加了开花吐丝间隔。识别这些受干旱持续时间和强度变化影响的不同生物量和产量组成部分，将有助于为未来气候适应性作物进行性状特异育种。

Abstract

Drought at flowering and grain filling greatly reduces maize(Zea mays) yield. Climate change is causing earlier and longer lasting periods of drought, which affect the growth of multiple maize organs throughout development. To study how longperiods of water deficit impact the dynamic nature of growth,and to determine how these relate to reproductive drought, we employed a high-throughput phenotyping platform featuring precise irrigation, imaging systems, and image-based biomass estimations. Prolonged drought resulted in a reduction of growthrate of individual organs-though an extension of growth duration partially compensated for this-culminating in lower biomass and delayed flowering. However, long periods of drought did not affect the highly organized succession of maximal growth rates of the distinct organs, i.e., leaves, stems, and ears. Two drought treatments negatively affected distinct seedyield components: prolonged drought mainly reduced the number of spikelets, and drought during the reproductive period increased the anthesis-silking interval. The identification of these divergent biomass and yield components, which were affected by the shift in duration and intensity of drought, will facilitate trait-specific breeding towards future climate-resilient crops.