Although exposure to low frequency electromagnetic radiation is harmful to plants, LF-EM irradiated Nerium oleander seedlings exhibited enhanced development and growth, probably taking advantage of defined structural leaf deformations. Currently, evidence supports the undesirable, often destructive impact of low frequency electromagnetic (LF-EM) radiation on plants. The response of plants to LF-EM radiation often entails induction in the biosynthesis of secondary metabolites, a subject matter that is well documented. Nerium oleander is a Mediterranean plant species, which evolved remarkable resistance to various environmental stress conditions. In the current investigation, cultivated N. oleander plants, following their long-term exposure to LF-EM radiation, exhibited major structural modifications as the flattening of crypts, the elimination of trichomes and the reduction of the layers of the epidermal cells. These changes co-existed with an oxidative stress response manifested by a significant increase in reactive oxygen species at both the roots and the above ground parts, a decline in the absorbance of light by photosynthetic pigments and the substantially increased biosynthesis of l-Dopa decarboxylase (DDC), an enzyme catalyzing the production of secondary metabolites that alleviate stress. The exposed plants exhibited greater primary plant productivity, despite a manifested photosynthetic pigment limitation and the severe oxidative stress. This unique response of N. oleander to severe abiotic stress conditions may be owed to the advantage offered by a structural change consistent to an easier diffusion of CO2 within the leaves. A major plant response to an emerging “pollutant” was documented.

中文翻译：

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夹竹桃幼苗对长期非电离辐射的响应

虽然暴露于低频电磁辐射对植物有害，但 LF-EM 辐照的夹竹桃幼苗表现出增强的发育和生长，可能利用了明确的叶片结构变形。目前，有证据支持低频电磁（LF-EM）辐射对植物的不良影响，通常是破坏性影响。植物对 LF-EM 辐射的反应通常需要诱导次生代谢物的生物合成，这是一个有据可查的主题。夹竹桃是一种地中海植物物种，对各种环境胁迫条件具有显着的抵抗力。在目前的调查中，栽培的夹竹桃植物在长期暴露于 LF-EM 辐射后，表现出主要的结构变化，即隐窝变平，毛状体的消除和表皮细胞层的减少。这些变化与氧化应激反应共存，表现为根部和地上部分的活性氧物种显着增加，光合色素对光的吸收率下降以及左旋多巴脱羧酶的生物合成显着增加。 DDC)，一种催化产生缓解压力的次级代谢产物的酶。尽管表现出光合色素限制和严重的氧化应激，但暴露的植物表现出更高的初级植物生产力。夹竹桃对严重非生物胁迫条件的这种独特反应可能归因于结构变化所提供的优势，该结构变化与叶片内的二氧化碳更容易扩散一致。