León José, Castillo Mari Cruz, Coego Alberto, Lozano-Juste Jorge, Mir Ricardo
Plant Development and Hormone Action, Instituto de Biología Molecular y Celular de Plantas (CSIC-Universidad Politécnica de Valencia), Spain.
J Exp Bot. 2014 Mar;65(4):907-21. doi: 10.1093/jxb/ert454. Epub 2013 Dec 26.
The extensive support for abscisic acid (ABA) involvement in the complex regulatory networks controlling stress responses and development in plants contrasts with the relatively recent role assigned to nitric oxide (NO). Because treatment with exogenous ABA leads to enhanced production of NO, it has been widely considered that NO participates downstream of ABA in controlling processes such as stomata movement, seed dormancy, and germination. However, data on leaf senescence and responses to stress suggest that the functional interaction between ABA and NO is more complex than previously thought, including not only cooperation but also antagonism. The functional relationship is probably determined by several factors including the time- and place-dependent pattern of accumulation of both molecules, the threshold levels, and the regulatory factors important for perception. These factors will determine the actions exerted by each regulator. Here, several examples of well-documented functional interactions between NO and ABA are analysed in light of the most recent reported data on seed dormancy and germination, stomata movements, leaf senescence, and responses to abiotic and biotic stresses.
脱落酸（ABA）广泛参与植物控制应激反应和发育的复杂调控网络，这与一氧化氮（NO）相对较新的作用形成对比。由于外源ABA处理会导致NO生成增加，人们普遍认为NO在ABA下游参与控制气孔运动、种子休眠和萌发等过程。然而，关于叶片衰老和应激反应的数据表明，ABA和NO之间的功能相互作用比以前认为的更为复杂，不仅包括协同作用，还包括拮抗作用。这种功能关系可能由几个因素决定，包括这两种分子积累的时间和位置依赖性模式、阈值水平以及对感知重要的调控因子。这些因素将决定每个调节因子所发挥的作用。在此，根据最近报道的关于种子休眠和萌发、气孔运动、叶片衰老以及对非生物和生物胁迫反应的数据，分析了NO和ABA之间有充分记录的功能相互作用的几个例子。
