title: The influence of different hydroponic conditions on thorium uptake by Brassica juncea var. foliosa.
abstract: The effects of different hydroponic conditions (such as concentration of thorium (Th), pH, carbonate, phosphate, organic acids, and cations) on thorium uptake by Brassica juncea var. foliosa were evaluated. The results showed that acidic cultivation solutions enhanced thorium accumulation in the plants. Phosphate and carbonate inhibited thorium accumulation in plants, possibly due to the formation of Th(HPO4)(2+), Th(HPO4)2, or Th(OH)3CO3 (-) with Th(4+), which was disadvantageous for thorium uptake in the plants. Organic aids (citric acid, oxalic acid, lactic acid) inhibited thorium accumulation in roots and increased thorium content in the shoots, which suggested that the thorium-organic complexes did not remain in the roots and were beneficial for thorium transfer from the roots to the shoots. Among three cations (such as calcium ion (Ca(2+)), ferrous ion (Fe(2+)), and zinc ion (Zn(2+))) in hydroponic media, Zn(2+) had no significant influence on thorium accumulation in the roots, Fe(2+) inhibited thorium accumulation in the roots, and Ca(2+) was found to facilitate thorium accumulation in the roots to a certain extent. This research will help to further understand the mechanism of thorium uptake in plants.
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, People's Republic of China.
authors.forename: Dingna
authors.initials: D
authors.lastname: Wang
authors.forename: Sai
authors.initials: S
authors.lastname: Zhou
authors.forename: Li
authors.initials: L
authors.lastname: Liu
authors.forename: Liang
authors.initials: L
authors.lastname: Du
authors.forename: Jianmei
authors.initials: J
authors.lastname: Wang
authors.forename: Zhenling
authors.initials: Z
authors.lastname: Huang
authors.forename: Lijian
authors.initials: L
authors.lastname: Ma
authors.forename: Songdong
authors.initials: S
authors.lastname: Ding
authors.forename: Dong
authors.initials: D
authors.lastname: Zhang
authors.forename: Ruibing
authors.initials: R
authors.lastname: Wang
authors.forename: Yongdong
authors.initials: Y
authors.lastname: Jin
authors.forename: Chuanqin
authors.initials: C
authors.lastname: Xia
mesh_terms: D002254:Carbonates / Q000494:pharmacology; D002264:Carboxylic Acids / Q000494:pharmacology; D002412:Cations / Q000494:pharmacology; D018527:Hydroponics; D009149:Mustard Plant / Q000187:drug effects / Q000378:metabolism*; D010710:Phosphates / Q000494:pharmacology; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism*; D013910:Thorium / Q000378:metabolism*; D015032:Zinc / Q000494:pharmacology
chemical_list: D002254:Carbonates; D002264:Carboxylic Acids; D002412:Cations; D010710:Phosphates; D013910:Thorium; D015032:Zinc