硒与丛枝菌根真菌对镉胁迫下人参菜生长及品质的影响

采用盆栽试验,通过土壤中添加硒(Se)和接种丛枝菌根真菌(Arbuscular mycorrhizal fungi,AMF),研究镉(Cd)胁迫下人参菜生长、品质、矿质元素及Cd、Se积累的变化规律。结果表明:Cd胁迫抑制了人参菜生长,降低了其品质,Cd在人参菜内大量积累。单独施Se、单独接菌和Se菌交互处理提高了人参菜的株高、茎粗、根长、植株分支数及生物量。维生素C、总黄酮、总酚含量显著增加,人参菜品质得到改善。人参菜中钙(Ca)、铜(Cu)和锌(Zn)含量增加,但镁(Mg)、铁(Fe)未受影响。单独施Se、单独接菌和Se菌交互处理降低了人参菜根系对Cd的吸收,抑制了Cd向地上部的转运,叶片中Cd含量较Cd处理分别降低了41.94%、70.50%和72.28%。综合来看,土壤施Se和接菌均能促进Cd胁迫下人参菜的生长,提高其品质,降低其可食用部位中Cd含量,尤以Se菌交互处理效果最佳。

Effects of selenium and arbuscular mycorrhizal fungi on the growth and quality of Talinum paniculatum(Jacq.)Gaertn under cadmium stress

This study investigated the growth and quality of Talinum paniculatum (Jacq.)Gaertn under cadmium stress and after the addition of selenium to the soil and inoculation of arbuscular mycorrhizal fungi (AMF). The study conducted a pot experiment to investigate the changes in growth, quality, mineral elements, and accumulation of Cd and Se in T. paniculatum. The results showed that Cd stress inhibited the growth and reduced the quality of T. paniculatum, and large amounts of Cd accumulated in T. paniculatum. Applying Se and AMF alone or Se and AMF together increased plant height, stem diameter, root length, plant branch number, and biomass of T. paniculatum. Vitamin C, total flavonoid, and total phenol contents increased significantly and the quality of T. paniculatum was improved with the application of Se and AMF. The contents of Ca, Cu, and Zn in T. paniculatum increased, but Se and AMF had no significant effect on either Mg or Fe. The application of Se alone, AMF alone, and Se and AMF together reduced Cd uptake by the roots and inhibited Cd transport to the shoots. The Cd contents in leaves decreased by 41.94%, 70.50%, and 72.28%, respectively, compared to Cd treatment alone. In conclusion, the application of Se and inoculation of AMF in soil can promote growth and quality and reduce the Cd content in edible parts of T. paniculatum under Cd stress. The Se and AMF interaction treatment is the most effective.