Festuca arundinacea is a model to work on the mechanisms of drought resistance in grasses. The crucial components of that resistance still remain not fully recognized. It was suggested that deep root system could be a crucial trait for drought avoidance strategy but the other components of root performance under water deficit have not paid much attention of scientists. In this study, two genotypes of F. arundinacea with a different ability to withstand soil water deficit were selected to perform comprehensive research, including analysis of root architecture, phytohormones, proteome, primary metabolome and lipidome under progressive stress conditions, followed by a rewatering period. The experiments were performed in tubes, thus enabling undisturbed development of root systems. We demonstrated that long roots are not sufficient to perfectly avoid drought damage in F. arundinacea and to withstand adverse environmental conditions without a disturbed cellular metabolism (with respect to leaf relative water potential and cellular membrane integrity). Furthermore, we proved that metabolic performance of roots is as crucial as its architecture under water deficit, to cope with drought stress via avoidance, tolerance and regeneration strategies. We believe that the presented studies could be a good reference for the other, more applied experiments, in closely related species.

中文翻译：

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高效的根部代谢改善了金银花的抗旱性

Festuca arundinacea是研究草类抗旱机制的模型。这种抵抗的关键因素仍然没有得到充分认识。有人提出，深根系统可能是避免干旱策略的关键特征，但缺水条件下根系表现的其他组成部分并没有引起科学家的重视。在这项研究中，选择了具有不同耐受土壤水分亏缺能力的两种亚种F. arundinacea，以进行综合研究，包括在进行性胁迫条件下分析根系结构，植物激素，蛋白质组，初级代谢组和脂质组，随后进行补水期。 。实验在试管中进行，因此根系的发育不受干扰。我们证明了，长根不足以完全避免干旱对阿伦狄亚藻的破坏并足以承受不利的环境条件而不会干扰细胞代谢（相对于叶片相对水势和细胞膜完整性）。此外，我们证明了根的代谢性能与其在缺水情况下的结构一样至关重要，通过避免，耐受和再生策略来应对干旱胁迫。我们相信，所提出的研究可以为密切相关物种中的其他更实用的实验提供很好的参考。我们证明了根的代谢性能与其在缺水情况下的结构一样至关重要，通过避免，耐受和再生策略来应对干旱胁迫。我们相信，所提出的研究可以为密切相关物种中的其他更实用的实验提供很好的参考。我们证明了根的代谢性能与其在缺水情况下的结构一样至关重要，通过避免，耐受和再生策略来应对干旱胁迫。我们相信，所提出的研究可以为密切相关物种中的其他更实用的实验提供很好的参考。