Neill Steven J, Desikan Radhika, Clarke Andrew, Hurst Roger D, Hancock John T
Centre for Research in Plant Science, Faculty of Applied Sciences, University of the West of England, Coldharbour Lane, Bristol BS16 1QY, UK.
J Exp Bot. 2002 May;53(372):1237-47.
It is now clear that hydrogen peroxide (H(2)O(2)) and nitric oxide (NO) function as signalling molecules in plants. A wide range of abiotic and biotic stresses results in H(2)O(2) generation, from a variety of sources. H(2)O(2) is removed from cells via a number of antioxidant mechanisms, both enzymatic and non-enzymatic. Both biotic and abiotic stresses can induce NO synthesis, but the biosynthetic origins of NO in plants have not yet been resolved. Cellular responses to H(2)O(2) and NO are complex, with considerable cross-talk between responses to several stimuli. In this review the potential roles of H(2)O(2) and NO during various stresses and the signalling pathways they activate are discussed. Key signalling components that might provide targets for enhancing crop production are also identified.
现在已经清楚，过氧化氢（H₂O₂）和一氧化氮（NO）在植物中作为信号分子发挥作用。多种非生物和生物胁迫会导致从各种来源产生H₂O₂。H₂O₂通过多种抗氧化机制（包括酶促和非酶促机制）从细胞中清除。生物和非生物胁迫均可诱导NO合成，但植物中NO的生物合成来源尚未明确。细胞对H₂O₂和NO的反应很复杂，对几种刺激的反应之间存在大量相互作用。在本综述中，讨论了H₂O₂和NO在各种胁迫期间的潜在作用以及它们激活的信号通路。还确定了可能为提高作物产量提供靶点的关键信号成分。
