PDF(Pubmed)
Abstract：
Atmospheric stressors include a variety of pollutant gases such as CO2, nitrous oxide (NOx), and sulfurous compounds which could have a natural origin or be generated by uncontrolled human activity. Nevertheless, other atmospheric elements including high and low temperatures, ozone (O3), UV-B radiation, or acid rain among others can affect, at different levels, a large number of plant species, particularly those of agronomic interest. Paradoxically, both nitric oxide (NO) and hydrogen sulfide (H2S), until recently were considered toxic since they are part of the polluting gases; however, at present, these molecules are part of the mechanism of response to multiple stresses since they exert signaling functions which usually have an associated stimulation of the enzymatic and non-enzymatic antioxidant systems. At present, these gasotransmitters are considered essential components of the defense against a wide range of environmental stresses including atmospheric ones. This review aims to provide an updated vision of the endogenous metabolism of NO and H2S in plant cells and to deepen how the exogenous application of these compounds can contribute to crop resilience, particularly, against atmospheric stressors stimulating antioxidant systems.
摘要：
大气压力源包括各种污染气体，如CO2，一氧化二氮（NOx），和含硫化合物，这些化合物可能具有天然来源或由不受控制的人类活动产生。然而，其他大气元素，包括高温和低温，臭氧(O3)UV-B辐射,或酸雨等会影响，在不同的层面，大量的植物种类,特别是那些对农艺感兴趣的。矛盾的是,一氧化氮（NO）和硫化氢（H2S），直到最近才被认为是有毒的，因为它们是污染气体的一部分；然而，目前,这些分子是响应多种应激的机制的一部分，因为它们发挥信号功能，通常具有酶促和非酶促抗氧化系统的相关刺激。目前,这些气体发射器被认为是防御包括大气在内的各种环境压力的重要组成部分。这篇综述旨在为植物细胞中NO和H2S的内源性代谢提供最新的视野，并加深这些化合物的外源应用如何有助于作物的抗逆性。特别是,对抗大气压力刺激抗氧化系统。
