欧亚国际

科学家刚刚利用Plantarray植物功能生理表型研究系统发表了题为“Coupled functional physiological phenotyping and simulation model to infer the transpiration sensitivity traits and its implications for transpiration ideotype design”的文章。

结合功能生理表型和模拟模型推断蒸腾敏感性特征及其对蒸腾理想模型设计意义

摘要 

随着农业干旱在全球范围内变得更加频繁，提高作物生产力，同时减少用水，以实现可持续生产至关重要。植物蒸腾和水分利用效率（WUE）共同决定产量表现，但由于对性状的机制理解仍然不足，在育种计划中平衡这两者是一项挑战。在这里，我们开发了一种量化基因型特异性性状的方法，该方法反映了在进化发育阶段和水分有效性条件下（STr-Rad和STr-VPD）蒸腾对辐射（Rad）和蒸气压不足（VPD）的敏感性。我们的方法利用了先进的功能生理表型（FPP）和反向使用模拟模型的原理。研究揭示了三个西瓜品种中STr-Rad和STr-VPD的基因型差异，它们在不同处理阶段的显著变化，以及它们对动态WUE模式的定量影响。基于我们的发现，提出了蒸腾型设计的一般原则，该原则强调了降低STr VPD以增加WUE和增加STr Rad以抵消Tr的下降的益处。FPP协助的表型选择将有助于筛选具有所需蒸腾敏感性的优良作物系。

Coupled functional physiological phenotyping and simulation model to infer the transpiration sensitivity traits and its implications for transpiration ideotype design 

Abstract

As agricultural drought becomes more frequent worldwide, it is essential to improve crop productivity whilst reducing the water consumption to achieve a sustainable production. Plant transpiration and water use efficiency (WUE) collectively determine

the yield performance, yet it is challenging to balance the two in breeding programs due  to still insufficient mechanistic understanding of the traits. Here we developed a method of quantifying the genotype-specific traits reflecting sensitivity of transpiration to  radiation (Rad) and vapor pressure deficit (VPD) under evolving developmental stage and water availability (STr-Rad and STr-VPD). Our method takes advantages of the state- 27 of-the-art functional physiological phenotyping (FPP) and the principle of inversely  using simulation models. We revealed the genotypic difference of STr-Rad and STr-VPD in  three watermelon accessions, the dramatic change in each of them across the treatment phases, and the quantitative impacts of them on dynamic WUE patterns. Based on our findings, a general principle for transpiration ideotype design is proposed, which highlights the benefits of lowering STr-VPD to increase WUE and increasing STr-Rad to offset the decline of Tr. FPP-enabled phenomic selection will help screen for elite crops  lines with desired transpiration sensitivities.