Abstract The importance of Selenium (Se) as a beneficial element in plants has been proven under several abiotic and biotic stress conditions. Importantly, Se is mainly incorporated into the human metabolism process as a component of food plants. In this study, we investigated the effects of foliar application of Se to pak choi Brassica rapa L. var. chinensis at different concentration levels (0, 0.5, 2, 20, 30 mg Se/Plant) on plant growth and glucosinolate hydrolysis products content. Both yield (FM) and dry matter (DM) were increased to 728.5 g and 41.4 g, respectively at a Se concentration of 2 mg Se/Plant. The sulfur amount was increased in response to higher concentrations of Se foliar application. Moreover, the concentration of the total glucosinolates hydrolysis products (GLS-HP) was 3.4 μmol/g FW, and the isothiocyanates (ITC) concentration significantly increased to a maximum of 0.5 μmol/g FW after the application of 2 mg of Se/Plant. This result is extremely promising owing to the health benefits associated with GLS-HP and isothiocynates. Additionally, increased Se application of more than 2 mg Se/Plant could have an opposite effect on plant growth and GLS-HP concentration.

中文翻译：

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硒叶面喷施改变了白菜芸苔属植物芥子油苷水解产物的模式。中华

摘要 硒 (Se) 作为植物有益元素的重要性已在多种非生物和生物胁迫条件下得到证实。重要的是，硒主要作为食用植物的一种成分被纳入人体代谢过程。在这项研究中，我们调查了叶面喷施硒对白菜 Brassica rapa L. var. 的影响。chinensis 在不同浓度水平 (0, 0.5, 2, 20, 30 mg Se/Plant) 对植物生长和硫代葡萄糖苷水解产物含量的影响。在硒浓度为 2 mg Se/Plant 时，产量 (FM) 和干物质 (DM) 分别增加到 728.5 g 和 41.4 g。硫含量随着更高浓度的硒叶面施用而增加。此外，总硫代葡萄糖苷水解产物 (GLS-HP) 的浓度为 3.4 μmol/g FW，应用 2 mg Se/Plant 后，异硫氰酸酯 (ITC) 浓度显着增加至最大值 0.5 μmol/g FW。由于与 GLS-HP 和异硫氰酸盐相关的健康益处，该结果非常有希望。此外，增加硒应用超过 2 毫克硒/植物可能对植物生长和 GLS-HP 浓度产生相反的影响。