Longchamp M, Angeli N, Castrec-Rouelle M
Sorbonne Universités, UPMC Univ Paris 06, CNRS, EPHE, UMR7619 METIS, 4 Place Jussieu, 75005 Paris, France.
UMR 1137 INRA-UHP Ecologie et Ecophysiologie Forestières, INRA - Centre de Nancy, 54280 Champenoux, France.
Plant Physiol Biochem. 2016 Jan;98:128-37. doi: 10.1016/j.plaphy.2015.11.013. Epub 2015 Nov 22.
The addition of selenate or selenite to common fertilizers for crop production could be an effective way of producing selenium-rich food and feed. However, this would be feasible only if the increase in plant selenium (Se) content did not negatively influence the uptake of other essential elements. We therefore need to understand the interactions between Se and other major and trace elements during uptake by the plant. This study aimed to evaluate the influence of inorganic forms of Se on the accumulation of selected macronutrients (Ca and Mg) and micronutrients (Fe, Zn, Mn and Cu). Those essential elements are involved in the oxidative balance of cells. Zea mays seedlings were grown hydroponically in growth chambers in nutrient solutions to which we added 10, 50 or 1000 μg.L(-1) of selenate and/or selenite. Cation accumulation was significantly affected by the addition of 50 μg.L(-1) or 1000 μg.L(-1) Se, but not by the presence of 10 μg.L(-1) of Se in the nutrient solution. The highest concentration (1000 μg.L(-1)) of Se in the nutrient solution affected the accumulation of essential cations in Zea mays: selenate tended to increase the accumulation of Mg, Zn and Mn, whereas a selenate/selenite mixture tended to decrease the accumulation of Ca, Mg, Zn and Mn. Only Fe accumulation was unaffected by Se whatever its form or concentration. Selenium may also affect the distribution of cations on Zea mays. For example, levels of Mg and Zn translocation to the shoots were lower in the presence of selenite.
在农作物生产的常用肥料中添加硒酸盐或亚硒酸盐可能是生产富硒食品和饲料的有效方法。然而，只有当植物硒（Se）含量的增加不会对其他必需元素的吸收产生负面影响时，这才可行。因此，我们需要了解植物吸收过程中硒与其他主要和微量元素之间的相互作用。本研究旨在评估无机形式的硒对选定常量营养素（钙和镁）和微量营养素（铁、锌、锰和铜）积累的影响。这些必需元素参与细胞的氧化平衡。在生长室中，将玉米幼苗种植在添加了10、50或1000μg.L⁻¹硒酸盐和/或亚硒酸盐的营养液中进行水培。添加50μg.L⁻¹或1000μg.L⁻¹的硒会显著影响阳离子的积累，但营养液中10μg.L⁻¹的硒则不会。营养液中最高浓度（1000μg.L⁻¹）的硒影响了玉米中必需阳离子的积累：硒酸盐倾向于增加镁、锌和锰的积累，而硒酸盐/亚硒酸盐混合物则倾向于减少钙、镁、锌和锰的积累。无论硒的形式或浓度如何，只有铁的积累不受影响。硒也可能影响玉米中阳离子的分布。例如，在亚硒酸盐存在的情况下，镁和锌向地上部的转运水平较低。
