Institute of Molecular Physiology and Biotechnology of Plants (IMBIO), University of Bonn, Kirschallee 1, 53115 Bonn, Germany.
Institute of Molecular Physiology and Biotechnology of Plants (IMBIO), University of Bonn, Kirschallee 1, 53115 Bonn, Germany; Present address: Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
Trends Plant Sci. 2017 Aug;22(8):705-717. doi: 10.1016/j.tplants.2017.05.007. Epub 2017 Jun 13.
Desiccation tolerance (DT) in angiosperms is present in the small group of resurrection plants and in seeds. DT requires the presence of protective proteins, specific carbohydrates, restructuring of membrane lipids, and regulatory mechanisms directing a dedicated gene expression program. Many components are common to resurrection plants and seeds; however, some are specific for resurrection plants. Understanding how each component contributes to DT is challenging. Recent transcriptome analyses and genome sequencing indicate that increased expression is essential of genes encoding protective components, recently evolved, species-specific genes and non-protein-coding RNAs. Modification and reshuffling of existing cis-regulatory promoter elements seems to play a role in the rewiring of regulatory networks required for increased expression of DT-related genes in resurrection species.
被子植物的干燥耐受性 (DT) 存在于一小部分复苏植物和种子中。DT 需要有保护蛋白、特定的碳水化合物、膜脂的重排以及指导特定基因表达程序的调控机制。许多成分在复苏植物和种子中是共同的；然而，有些成分是复苏植物特有的。了解每个成分如何有助于 DT 是具有挑战性的。最近的转录组分析和基因组测序表明，增加编码保护性成分、最近进化的、物种特异性基因和非蛋白质编码 RNA 的基因的表达是必不可少的。修饰和重新排列现有的顺式调控启动子元件似乎在重新连接调控网络中发挥作用，这是复苏物种中与 DT 相关基因表达增加所必需的。
