Centre for Tropical Crops and Biocommodities, Queensland University of Technology, P.O. Box 2434, Brisbane 4001, QLD, Australia.
Centre for Tropical Crops and Biocommodities, Queensland University of Technology, P.O. Box 2434, Brisbane 4001, QLD, Australia.
Plant Sci. 2018 Jun;271:62-66. doi: 10.1016/j.plantsci.2018.03.009. Epub 2018 Mar 14.
Plants constantly respond to threats in their environment by balancing their energy needs with growth, defence and survival. Some plants such as the small group of resilient angiosperms, the resurrection plants, do this better than most. Resurrection plants possess the capacity to tolerate desiccation in vegetative tissue and upon watering, regain full metabolic capacity within 72 h. Knowledge of how these plants survive such extremes has advanced in the last few decades, but the molecular mechanics remain elusive. Energy and water metabolism, cell cycle control, growth, senescence and cell death all play key roles in resurrection plant stress tolerance. Some resurrection plants suppress growth to improve energy efficiency and survival while sensitive species exhaust energy resources rapidly, have a diminished capacity to respond and die. How do the stress and energy metabolism responses employed by resurrection plants differ to those used by sensitive plants? In this perspective, we summarise recent findings defining the relationships between energy metabolism, stress tolerance and programmed cell death and speculate important roles for this regulation in resurrection plants. If we want to harness the strategies of resurrection plants for crop improvement, first we must understand the processes that underpin energy metabolism during growth and stress.
植物通过平衡其生长、防御和生存所需的能量与环境威胁来持续做出反应。一些植物，如具有弹性的被子植物这一小群复苏植物，比大多数植物更擅长此道。复苏植物具有耐受营养组织干燥的能力，在浇水后，它们可在 72 小时内恢复完全的代谢能力。在过去几十年中，人们对这些植物如何在如此极端的条件下生存有了更多的了解，但分子机制仍然难以捉摸。能量和水代谢、细胞周期控制、生长、衰老和细胞死亡都在复苏植物的应激耐受中发挥着关键作用。一些复苏植物会抑制生长以提高能量效率和生存能力，而敏感物种则会迅速耗尽能量资源，应对能力减弱，最终死亡。复苏植物所采用的应激和能量代谢反应与敏感植物有何不同？在这篇观点文章中，我们总结了最近的发现，这些发现定义了能量代谢、应激耐受和程序性细胞死亡之间的关系，并推测这种调控在复苏植物中具有重要作用。如果我们想利用复苏植物的策略来改良作物，首先我们必须了解在生长和应激过程中支撑能量代谢的过程。
