This study investigates the effect of static magnetic field (SMF) pre-treatment in ameliorating arsenic (As) toxicity in soybean plants in relation to growth, photosynthesis and water transport through leaf venation. Soybean (Glycine max variety JS-9560) seeds pre-treated with SMF (200 mT for 1 h) were grown in four levels of arsenate-polluted soil (As(V); 0, 5, 10 and 50 mg kg⁻¹) in order to find out the impact of magnetopriming on plant tolerance against As toxicity. Quantitative image analysis of soybean leaf venation showed a narrowing in the width of midrib with increasing As(V) contamination in non-primed seeds. The morphological variations are also supported by the physiological parameters such as reduction in efficiency of photosystem II, plant performance index, stomatal conductance and photosynthetic rate in the presence of As(V) for non-primed seeds. However, remarkable increase was observed in all the measured parameters by SMF pre-treatment at all the concentrations of As(V) used. Even for the highest concentration of As(V) (50 mg kg⁻¹ soil), SMF pre-treatment caused significant enhancement in plant height (40%), area of third trifoliate leaves (40%), along with increase in width of the midrib (17%) and minor vein (13%), contributing to increase in the water uptake, that resulted in higher primary photochemistry of PSII (12%), performance index (50%), stomatal conductance (57%) and photosynthetic rate (33%) as compared to non-primed ones. Consequently, magnetopriming of dry seeds can be effectively used as pretreatment for reduction of As toxicity in soybean plants.

中文翻译：

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涉及同步加速器成像的磁引发效应对砷胁迫诱导的大豆形态和生理变化的影响


本研究探讨静磁场 (SMF) 预处理在改善大豆植物砷 (As) 毒性方面的效果，该毒性与生长、光合作用和通过叶脉的水输送有关。用 SMF（200 mT，1 小时）预处理的大豆（ Glycine max品种 JS-9560）种子在四个级别的砷酸盐污染土壤中生长（As(V)；0、5、10 和 50 mg kg ^-1 ）为了找出磁引发对植物对砷毒性耐受性的影响。大豆叶脉的定量图像分析显示，随着未处理种子中 As(V) 污染的增加，中脉宽度变窄。形态变化也得到了生理参数的支持，例如未引发种子的光系统 II 效率的降低、植物性能指数、气孔导度和 As(V) 存在下的光合速率。然而，在所有使用的 As(V) 浓度下，通过 SMF 预处理，所有测量参数均显着增加。即使对于最高浓度的 As(V)（50 mg kg ⁻¹土壤），SMF 预处理也会导致植物高度（40%）、第三三叶叶面积（40%）以及宽度的增加显着增加。中脉（17%）和小脉（13%），有助于增加水的吸收，从而导致 PSII 的初级光化学（12%）、性能指数（50%）、气孔导度（57%）和光合作用更高与非底漆相比，率（33%）。因此，干种子的磁引发可以有效地用作减少大豆植物中砷毒性的预处理。