Council for Agricultural Research and Economics- Research Centre for Genomics and Bioinformatics (CREA-GB), via San Protaso 302, 29017, Fiorenzuola d'Arda, PC, Italy; Department for Sustainable Food Process, Research Centre for Nutrigenomics and Proteomics, Università Cattolica del Sacro Cuore, Piacenza, Italy.
Department of Agronomy, Food, Natural Resources, Animals and Environment, Università di Padova, Padova, Italy.
Plant Physiol Biochem. 2019 Apr;137:203-212. doi: 10.1016/j.plaphy.2019.02.007. Epub 2019 Feb 12.
Under global climate change forecasts, the pressure of environmental stressors (and in particular drought) on crop productivity is expected to rise and challenge further global food security. The application of beneficial microorganisms may represent an environment friendly tool to secure improved crop performance and yield stability. Accordingly, this current study aimed at elucidating the metabolomic responses triggered by mycorrhizal (Funneliformis mosseae) inoculation of durum (Triticum durum Desf.; cv. 'Mongibello') and bread wheat cultivars (Triticum aestivum L.; cv. 'Chinese Spring') under full irrigation and water deficit regimes. Metabolomics indicated a similar regulation of secondary metabolism in both bread and durum wheat cultivars following water limiting conditions. Nonetheless, a mycorrhizal fungi (AMF) x cultivar interaction could be observed, with the bread wheat cultivar being more affected by arbuscular colonization under water limiting conditions. Discriminant compounds could be mostly related to sugars and lipids, both being positively modulated by AMF colonization under water stress. Moreover, a regulation of metabolites related to oxidative stress and a tuning of crosstalk between phytohormones were also evidenced. Among the latter, the stimulation of the brassinosteroids biosynthetic pathway was particularly evident in inoculated wheat roots, supporting the hypothesis of their involvement in enhancing plant response to water stress and modulation of oxidative stress conditions. This study proposes new insights on the modulation of the tripartite interaction plant-AMF-environmental stress.
在全球气候变化预测下，环境胁迫（特别是干旱）对作物生产力的压力预计将增加，从而进一步挑战全球粮食安全。有益微生物的应用可能代表着一种环保工具，可以确保提高作物性能和产量稳定性。因此，本研究旨在阐明菌根（摩西管柄囊霉）接种硬粒小麦（Triticum durum Desf.； cv. 'Mongibello'）和普通小麦品种（Triticum aestivum L.； cv. 'Chinese Spring'）在充分灌溉和水分亏缺条件下引发的代谢组学响应。代谢组学表明，在水分限制条件下，两种面包和硬粒小麦品种的次生代谢物调节相似。然而，在水分限制条件下，可以观察到菌根真菌（AMF）和品种之间的相互作用，其中面包小麦品种在丛枝菌根定殖下受影响更大。可区分的化合物主要与糖和脂质有关，在水分胁迫下，这些化合物都被 AMF 定殖正向调节。此外，还证明了与氧化应激相关的代谢物的调节以及植物激素之间相互作用的调节。在后者中，接种小麦根中类黄酮生物合成途径的刺激尤为明显，这支持了它们参与增强植物对水分胁迫的反应和调节氧化应激条件的假说。本研究为植物-AMF-环境胁迫的三方相互作用的调节提出了新的见解。
