Journal
PLANTS-BASEL
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/plants10112290
Keywords
Olea europaea L.; selenium biofortification; oxidative stress; olive pollen; cytosolic Ca2+
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Selenium is a crucial micronutrient for living organisms, contributing to improved food quality and oxidative stress tolerance. Studies have shown that selenium enhances plant response to abiotic stress, while experiments on selenium treatment demonstrate its beneficial and long-lasting effects on pollen.
Selenium (Se) is an important micronutrient for living organisms, since it is involved in several physiological and metabolic processes. Biofortification with Se increases the nutritional and qualitative values of foods in Se-deficient regions and increases tolerance to oxidative stress in olive trees. Many studies have shown that Se, in addition to improving the qualitative and nutritional properties of EVO oil, also improves the plant's response to abiotic stress. This study addressed this issue by monitoring the effects of Se on cytosolic Ca2+ and on the germination of olive pollen grains in oxidative stress. The olive trees subjected to treatment with Na-selenate in the field produced pollen with a Se content 6-8 times higher than the controls, even after 20 months from the treatment. Moreover, part of the micronutrient was organic in selenium methionine. The higher selenium content did not produce toxic effects in the pollen, rather it antagonized the undesirable effects of oxidative stress in the parameters under study. The persistence of the beneficial effects of selenium observed over time in pollens, in addition to bringing out an undisputed adaptability of olive trees to the micronutrient, suggested the opportunity to reduce the number of treatments in the field.
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