Kolbert Zsuzsanna, Barroso Juan B, Boscari Alexandre, Corpas Francisco J, Gupta Kapuganti Jagadis, Hancock John T, Lindermayr Christian, Palma José Manuel, Petřivalský Marek, Wendehenne David, Loake Gary J
Department of Plant Biology, University of Szeged, H6726, Szeged, Hungary.
Group of Biochemistry and Cell Signalling in Nitric Oxide, University of Jaén, Campus Universitario 'Las Lagunillas' s/n, E-23071, Jaén, Spain.
New Phytol. 2024 Nov;244(3):786-797. doi: 10.1111/nph.20085. Epub 2024 Sep 2.
Plant survival to a potential plethora of diverse environmental insults is underpinned by coordinated communication amongst organs to help shape effective responses to these environmental challenges at the whole plant level. This interorgan communication is supported by a complex signal network that regulates growth, development and environmental responses. Nitric oxide (NO) has emerged as a key signalling molecule in plants. However, its potential role in interorgan communication has only recently started to come into view. Direct and indirect evidence has emerged supporting that NO and related species (S-nitrosoglutathione, nitro-linolenic acid) are mobile interorgan signals transmitting responses to stresses such as hypoxia and heat. Beyond their role as mobile signals, NO and related species are involved in mediating xylem development, thus contributing to efficient root-shoot communication. Moreover, NO and related species are regulators in intraorgan systemic defence responses aiming an effective, coordinated defence against pathogens. Beyond its in planta signalling role, NO and related species may act as ex planta signals coordinating external leaf-to-leaf, root-to-leaf but also plant-to-plant communication. Here, we discuss these exciting developments and emphasise how their manipulation may provide novel strategies for crop improvement.
植物对大量多样环境胁迫的耐受性，是由器官间的协同通讯所支撑的，这有助于在整株植物水平上形成对这些环境挑战的有效应对。这种器官间的通讯由一个复杂的信号网络支持，该网络调节生长、发育和环境响应。一氧化氮（NO）已成为植物中的关键信号分子。然而，其在器官间通讯中的潜在作用直到最近才开始显现。直接和间接证据表明，NO及相关物质（S-亚硝基谷胱甘肽、硝基亚麻酸）是移动的器官间信号，传递对缺氧和热等胁迫的响应。除了作为移动信号的作用外，NO及相关物质还参与介导木质部发育，从而有助于根-梢间的有效通讯。此外，NO及相关物质是器官内系统防御反应的调节因子，旨在对病原体进行有效、协调的防御。除了其在植物体内的信号作用外，NO及相关物质可能作为植物外信号，协调外部叶-叶、根-叶以及植物-植物间的通讯。在此，我们讨论这些令人兴奋的进展，并强调对它们的操控如何可能为作物改良提供新策略。
