20.500.12556/RUL-143840 Tissue-specific calcium and magnesium allocation to explain differences in bulk concentration in leaves of one-year-old seedlings of two olive (Olea europaea L.) cultivars Olive tree (Olea europaea L.) leaves have recently been recognised as a valuable source in cosmetic and pharmaceutical industry as well as in preparation of health-supporting beverages. Little is known about the element composition of olive leaves and almost nothing about tissue-specific allocation of elements. Element composition in tissue-specific distribution were determined in leaves of two olive cultivars, Leccino and Istarska bjelica using micro-particle induced X-ray emission (micro-PIXE). In leaves of the Istarska bjelica cultivar larger bulk concentrations of potassium, sodium, molybdenum and boron, but smaller concentrations of calcium and magnesium were found than in leaves of the Leccino cultivar. Tissue-specific investigation revealed that larger concentration of calcium in epidermis and in leaf blade tissues (secondary veins, palisade and spongy mesophyll) contributed to the larger leaf bulk calcium concentration in the Leccino cultivar. For magnesium, all leaf tissues, except the bundle sheath cells and consequently the main vascular bundle, contributed to the larger bulk concentration in the Leccino cultivar. Potassium was not predominant in any of the leaf tissues examined, while sodium and molybdenum were below the limit of detection, and boron not detectable by micro-PIXE. The results indicate that sinks for calcium and magnesium are stronger in specific leaf tissues of the Leccino than of the Istarska bjelica cultivar. The new understanding of tissue-specific allocation of elements in leaves of olive will serve as a basis for detailed studies into the effects of foliar and/or soil fertilisers in olive. olive tree leaves calcium magnesium mineral nutrition potassium seedlings X-ray fluoerescence oljčni listi kalcij magnezij mineralna prehrana kalij sadike true false true Angleški jezik Slovenski jezik Članek v reviji 2023-01-13 12:14:38 2023-01-13 12:14:44 2023-02-21 14:13:03 0000-00-00 00:00:00 2023 0 0 Str. 619-626 Vol. 194 Jan. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 58 1873-2690 10.1016/j.plaphy.2022.11.040 132713987 1-s2.0-S0981942822005423-main.pdf 1-s2.0-S0981942822005423-main.pdf 1 999444F5CF87AF15B1D0CFCE52E5CFDD 6ecc29317744e158183eb8b8f500bf42613b750f3796353d57cc465b08a23338 88729f2c-9333-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=165854 https://www.sciencedirect.com/science/article/pii/S0981942822005423 0 3f9b75f9-9333-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=165853 Biotehniška fakulteta 0 0 0