Caracterización de la conductancia mínima y el reparto de asimilados en condiciones de déficit hídrico en variedades de olivo
2023
Benhalima, Fátima Zohra
The olive tree thrives in arid and semi-arid regions due to its resilience to water scarcity. This study evaluated 177 olive cultivars from the World Olive Germplasm Bank (BGMO-UCO) for eco-physiological responses to water deficit, focusing on minimum conductance as a drought tolerance mechanism. While most varieties showed no significant differences, some exhibited notable variability, highlighting genetic diversity in drought response. A second experiment with young plants of four varieties ('Arbequina,' 'Cornezuelo de Jaén,' 'Cornicabra,' and 'Manzanilla de Sevilla') analyzed the impact of water deficit on biomass production and resource allocation. Water stress significantly reduced growth and biomass in all varieties, underlining water's vital role in development. Despite this, no significant differences in biomass production or root allocation were found among varieties. However, a shift towards increased root resource allocation was observed, reflecting an adaptive strategy to improve water and nutrient uptake under drought conditions.
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