Islam Monirul, Vigani Gianpiero, Maffei Massimo E
Plant Physiology Unit, Department of Life Sciences and Systems Biology, University of Turin, 10135 Turin, Italy.
Plants (Basel). 2020 Dec 8;9(12):1729. doi: 10.3390/plants9121729.
The Geomagnetic field (GMF) is a typical component of our planet. Plant perception of the GMF implies that any magnetic field (MF) variation would induce possible metabolic changes. In this work was we assessed the role of the GMF on Col0 mineral nutrition and lipid metabolism during plant development. We reduced the local GMF (about 40 μT) to Near Null Magnetic Field (NNMF, about 30 nT) to evaluate the effects of GMF on Arabidopsis in a time-course (from rosette to seed-set) experiment by studying the lipid content (fatty acids, FA; and surface alkanes, SA) and mineral nutrients. The expression of selected genes involved in lipid metabolism was assessed by Real-Time PCR (qPCR). A progressive increase of SA with carbon numbers between 21 and 28 was found in plants exposed to NNMF from bolting to flowering developmental stages, whereas the content of some FA significantly ( < 0.05) increased in rosette, bolting and seed-set developmental stages. Variations in SA composition were correlated to the differential expression of several Arabidopsis 3-ketoacyl-CoAsynthase () genes, including , , , and , a lipid transfer protein () and a lipase (). Ionomic analysis showed a significant variation in some micronutrients (Fe, Co, Mn and Ni) and macronutrients (Mg, K and Ca) during plant development of plants exposed to NNMF. The results of this work show that responds to variations of the GMF which are perceived as is typical of abiotic stress responses.
地磁场（GMF）是我们星球的一个典型组成部分。植物对地磁场的感知意味着任何磁场（MF）变化都可能引发代谢变化。在这项工作中，我们评估了地磁场在植物发育过程中对拟南芥Col0矿质营养和脂质代谢的作用。我们将局部地磁场（约40μT）降低到近零磁场（NNMF，约30nT），通过研究脂质含量（脂肪酸，FA；和表面烷烃，SA）和矿质营养，在一个时间进程（从莲座叶期到结实期）实验中评估地磁场对拟南芥的影响。通过实时定量聚合酶链反应（qPCR）评估参与脂质代谢的选定基因的表达。在从抽薹到开花发育阶段暴露于近零磁场的植物中，发现碳数在21至28之间的表面烷烃有逐渐增加，而在莲座叶期、抽薹期和结实期发育阶段某些脂肪酸的含量显著（<0.05）增加。表面烷烃组成的变化与几种拟南芥3-酮脂酰辅酶A合酶（）基因的差异表达相关，包括、、、和，一个脂质转运蛋白（）和一个脂肪酶（）。离子组学分析表明，在暴露于近零磁场的植物发育过程中，一些微量营养素（铁、钴、锰和镍）和大量营养素（镁、钾和钙）有显著变化。这项工作的结果表明，拟南芥对被视为非生物胁迫反应典型的地磁场变化有响应。
