山东农业科学2025，Vol.57Issue(4)：120-127,8.DOI:10.14083/j.issn.1001-4942.2025.04.015
外源硒对砷胁迫下小白菜硒砷积累和转运的影响
Effects of Exogenous Selenium on Accumulation and Transport of Selenium and Arsenic in Pakchoi under Arsenic Stress
摘要
Abstract
To investigate the effects of exogenous selenium(Se)on accumulation and transport of Se and arsenic(As)in pakchoi under As stress,and find the optimal Se application technique for Se enrichment and As reduction,a pot experiment was conducted.Different soil-applied Se levels(0～2.0 mg/kg),different Se valence states[Se(Ⅳ)and Se(Ⅵ)],and foliar-applied Se(2.0 and 8.0 mg/L)were set under mild As stress(100 mg/kg),and their impacts on Se and As accumulation and transport in the shoots and roots of pa-kchoi were studied.The results showed that soil application of 0.5～2.0 mg/kg Se(Ⅳ)and Se(Ⅵ)and foliar application of 2.0 and 8.0 mg/L Se(Ⅳ)significantly increased the total Se content in different parts of pak-choi plants.Pakchoi exhibited much higher accumulation and transport capacities for Se(Ⅵ)than Se(Ⅳ).Soil application of 0.25,1.0 and 2.0 mg/kg Se(Ⅳ),as well as 2.0 mg/kg Se(Ⅵ),significantly inhibited As transport from roots to shoots,thereby markedly reduced As accumulation in shoots.However,soil application of 0.5 mg/kg Se(Ⅳ)and 0.5 mg/kg Se(Ⅵ)had no significant effect on As accumulation or transport.Foliar application of 2.0 and 8.0 mg/L Se(Ⅳ)significantly suppressed As transport to shoots,resulting in the in-crease of As accumulation in roots but no significant impact on shoot As level.In conclusion,the effects of ex-ogenous Se on As accumulation and transport in pakchoi under As stress varied with Se application rates and methods,and were consistent across Se valence states at the same Se application level.Soil application of Se(Ⅳ)and Se(Ⅵ)effectively reduced the As content in edible part of pakchoi.For producing Se-enriched pak-choi under mild As stress,applying 1.0 mg/kg Se(Ⅳ)into soil was recommended,which could achieve both As reduction and safe Se enrichment.关键词
外源硒/砷胁迫/小白菜/硒砷积累和转运Key words
Exogenous selenium/Arsenic stress/Pakchoi/Accumulation and transport of selenium and arsenic分类
园艺学与植物营养学引用本文复制引用
秦玉燕,王运儒,吴凤,吕丽兰,时鹏涛,陈羽烨,姚金洁,张利伟..外源硒对砷胁迫下小白菜硒砷积累和转运的影响[J].山东农业科学,2025,57(4):120-127,8.基金项目
广西青年科学基金项目(2018GXNSFBA281171) （2018GXNSFBA281171）
特色果蔬质量安全风险评估研究项目(2022021) （2022021）
农产品质量标准及检测技术研究团队项目(桂农科2021YT148) （桂农科2021YT148）
