| Autor: |
Falcón-Piñeiro A; DMC Research Center, Camino de Jayena 82, 18620 Alhendín, Granada, Spain., Zaguirre-Martínez J; Department of Plant Physiology, University of Granada, Fuentenueva s/n, 18071 Granada, Granada, Spain., Ibáñez-Hernández AC; Department of Plant Physiology, University of Granada, Fuentenueva s/n, 18071 Granada, Granada, Spain., Guillamón E; DMC Research Center, Camino de Jayena 82, 18620 Alhendín, Granada, Spain., Santander K; Neval, Camí del Horts s/n, 12592 Xilxes, Castellón, Spain., Barrero-Domínguez B; Dcoop Sociedad Cooperativa Andaluza, Carretera Córdoba s/n, 29200 Antequera, Málaga, Spain., López-Feria S; Dcoop Sociedad Cooperativa Andaluza, Carretera Córdoba s/n, 29200 Antequera, Málaga, Spain., Garrido D; Department of Plant Physiology, University of Granada, Fuentenueva s/n, 18071 Granada, Granada, Spain., Baños A; DMC Research Center, Camino de Jayena 82, 18620 Alhendín, Granada, Spain. |
| Abstrakt: |
The olive tree is crucial to the Mediterranean agricultural economy but faces significant threats from climate change and soil-borne pathogens like Verticillium dahliae . 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 V. dahliae . 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 V. dahliae 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. |
