Vidović Nikolina, Pasković Igor, Lukić Igor, Žurga Paula, Majetić Germek Valerija, Grozić Kristina, Cukrov Marin, Marcelić Šime, Ban Dean, Talhaoui Nassima, Palčić Igor, Rubinić Vedran, Goreta Ban Smiljana
Department of Agriculture and Nutrition, Institute of Agriculture and Tourism, K. Huguesa 8, 52440 Poreč, Croatia.
Centre of Excellence for Biodiversity and Molecular Plant Breeding, Svetošimunska 25, 10000 Zagreb, Croatia.
Plants (Basel). 2021 Aug 20;10(8):1724. doi: 10.3390/plants10081724.
Manganese (Mn) is an essential element that intervenes in several plant metabolic processes. The olive tree, and its fruits and leaves, are known as a source of nutraceuticals since they are rich in biophenols. However, there is still a serious lack of data about biophenolic distribution in olive stems and roots under Mn fertilisation. In this context, our study aimed to examine the effects of Mn fertilisation on the biophenolic profile in the leaves, stems, and roots of the 'Istarska bjelica' olive cultivar. The experiment was set up in a greenhouse, during a period of five months, as a random block design consisting of three treatments with varying Mn concentrations in full-strength Hoagland's nutrient solution (0.2 µM Mn, 12 µM Mn, and 24 µM Mn). The obtained results indicate that the amount of Mn in the examined olive plant tissues was significantly higher under 12 µM Mn and 24 µM Mn treatments compared to that of the 0.2 µM Mn treatment. While the concentration of biophenols varied in roots depending on the compound in question, a strong positive impact of the increased Mn concentration in nutrient solution (12 µM Mn and 24 µM Mn) on the concentrations of the main biophenolic compounds was observed in stems. The concentration of oleuropein in leaves almost doubled at 24 µM Mn, with the highest Mn concentration, as compared to the 0.2 µM Mn treatment. The obtained results led to the conclusion that the supply of Mn could enhance the concentration of some biologically active compounds in olives grown hydroponically, implying a critical need for further investigation of Mn fertilisation practices in the conventional olive farming system.
锰(Mn)是一种参与多种植物代谢过程的必需元素。橄榄树及其果实和叶子是营养保健品的来源,因为它们富含生物酚。然而,关于锰施肥条件下橄榄茎和根中生物酚分布的数据仍然严重缺乏。在此背景下,我们的研究旨在考察锰施肥对“Istarska bjelica”橄榄品种叶片、茎和根中生物酚谱的影响。实验在温室中进行,为期五个月,采用随机区组设计,在全强度霍格兰营养液中设置三种不同锰浓度的处理(0.2 µM锰、12 µM锰和24 µM锰)。所得结果表明,与0.2 µM锰处理相比,在12 µM锰和24 µM锰处理下,所检测的橄榄植物组织中的锰含量显著更高。虽然根中生物酚的浓度因所讨论的化合物而异,但在茎中观察到营养液中锰浓度增加(12 µM锰和24 µM锰)对主要生物酚化合物浓度有强烈的积极影响。与0.2 µM锰处理相比,在24 µM锰(锰浓度最高)时,叶片中橄榄苦苷的浓度几乎增加了一倍。所得结果得出结论,锰的供应可以提高水培橄榄中一些生物活性化合物的浓度,这意味着迫切需要进一步研究传统橄榄种植系统中的锰施肥实践。