Falcón-Piñeiro Ana, Zaguirre-Martínez Javier, Ibáñez-Hernández Ana Claudia, Guillamón Enrique, Santander Kristell, Barrero-Domínguez Belén, López-Feria Silvia, Garrido Dolores, Baños Alberto
DMC Research Center, Camino de Jayena 82, 18620 Alhendín, Granada, Spain.
Department of Plant Physiology, University of Granada, Fuentenueva s/n, 18071 Granada, Granada, Spain.
Plants (Basel). 2024 Sep 6;13(17):2499. doi: 10.3390/plants13172499.
The olive tree is crucial to the Mediterranean agricultural economy but faces significant threats from climate change and soil-borne pathogens like . This study assesses the dual role of an onion extract formulation, rich in organosulfur compounds, as both biostimulant and antifungal agent. Research was conducted across three settings: a controlled climatic chamber with non-stressed olive trees; an experimental farm with olive trees under abiotic stress; and two commercial olive orchards affected by . Results showed that in the climatic chamber, onion extract significantly reduced MDA levels in olive leaves, with a more pronounced reduction observed when the extract was applied by irrigation compared to foliar spray. The treatment also increased root length by up to 37.1% compared to controls. In field trials, irrigation with onion extract increased the number of new shoots by 148% and the length of shoots by 53.5%. In commercial orchards, treated trees exhibited reduced MDA levels, lower density, and a 26.7% increase in fruit fat content. These findings suggest that the onion extract effectively reduces oxidative stress and pathogen colonization, while enhancing plant development and fruit fat content. This supports the use of the onion extract formulation as a promising, sustainable alternative to chemical treatments for improving olive crop resilience.
橄榄树对地中海农业经济至关重要，但面临着气候变化和土壤传播病原体等重大威胁。本研究评估了富含有机硫化合物的洋葱提取物配方作为生物刺激剂和抗真菌剂的双重作用。研究在三种环境中进行：有非胁迫橄榄树的可控气候室；有遭受非生物胁迫的橄榄树的试验农场；以及两个受[未提及具体内容]影响的商业橄榄园。结果表明，在气候室中，洋葱提取物显著降低了橄榄叶中的丙二醛（MDA）水平，与叶面喷施相比，通过灌溉施用提取物时观察到的降低更为明显。与对照相比，该处理还使根长增加了37.1%。在田间试验中，用洋葱提取物灌溉使新梢数量增加了148%，梢长增加了53.5%。在商业果园中，处理过的树木MDA水平降低，[未提及具体内容]密度降低，果实脂肪含量增加了26.7%。这些发现表明，洋葱提取物能有效降低氧化应激和病原体定植，同时促进植物生长和果实脂肪含量。这支持将洋葱提取物配方作为一种有前景的、可持续的替代化学处理方法，以提高橄榄作物的抗逆性。
