Konecny Tomas, Asatryan Armine, Nikoghosyan Maria, Binder Hans
Armenian Bioinformatics Institute, Yerevan 0014, Armenia.
Interdisciplinary Centre for Bioinformatics, University of Leipzig, 04107 Leipzig, Germany.
Plants (Basel). 2024 Sep 6;13(17):2501. doi: 10.3390/plants13172501.
Mechanisms underlying grapevine responses to water(-deficient) stress (WS) are crucial for viticulture amid escalating climate change challenges. Reanalysis of previous transcriptome data uncovered disparities among isohydric and anisohydric grapevine cultivars in managing water scarcity. By using a self-organizing map (SOM) transcriptome portrayal, we elucidate specific gene expression trajectories, shedding light on the dynamic interplay of transcriptional programs as stress duration progresses. Functional annotation reveals key pathways involved in drought response, pinpointing potential targets for enhancing drought resilience in grapevine cultivation. Our results indicate distinct gene expression responses, with the isohydric cultivar favoring plant growth and possibly stilbenoid synthesis, while the anisohydric cultivar engages more in stress response and water management mechanisms. Notably, prolonged WS leads to converging stress responses in both cultivars, particularly through the activation of chaperones for stress mitigation. These findings underscore the importance of understanding cultivar-specific WS responses to develop sustainable viticultural strategies in the face of changing climate.
在气候变化挑战不断升级的背景下，葡萄对水分（亏缺）胁迫（WS）的响应机制对葡萄栽培至关重要。对先前转录组数据的重新分析揭示了等水和非等水葡萄品种在应对水资源短缺方面的差异。通过使用自组织映射（SOM）转录组描绘，我们阐明了特定的基因表达轨迹，揭示了随着胁迫持续时间的推移转录程序的动态相互作用。功能注释揭示了参与干旱响应的关键途径，确定了提高葡萄栽培中抗旱能力的潜在靶点。我们的结果表明了不同的基因表达反应，等水品种有利于植物生长并可能促进芪类化合物的合成，而非等水品种更多地参与胁迫反应和水分管理机制。值得注意的是，长期的水分胁迫导致两个品种的胁迫反应趋同，特别是通过激活分子伴侣来减轻胁迫。这些发现强调了了解品种特异性水分胁迫反应对于在气候变化面前制定可持续葡萄栽培策略的重要性。
