title: Lanthanum resulted in unbalance of nutrient elements and disturbance of cell proliferation cycles in V. faba L. seedlings.
abstract: Effects of lanthanum (La) on mineral nutrients, cell cycles, and root lengthening have been little reported. The present work investigated these physiological responses in roots of Vicia faba seedlings cultivated in La3+-contained solutions for 15 days. The results showed that the increasing contents of La in the roots and leaves contributed to disbalances of contents of Ca, Fe, Cu, Zn, Mg, Mn, P, and K elements, and potential redistributions of some elements in the roots and leaves. These disbalances might be involved in the subsequent alteration of cell cycle phases in the root tips. Low-dose promotion and high-dose inhibition (Hormetic effects) were demonstrated as the dose responses of G0/G1-, S- or G2/M-phase ratios. The cell cycles were most probably arrested at G1/S interphase by La3+ in the root tips. The fact that the root lengths were not consistent with the changes of cell cycle phases suggested that the cell proliferation activities might be masked by other factors (e.g., cell expansion) under long-time exposure to La3+.
authors.affiliation: School of Life Science, Huainan Normal University, Huainan, 232001, China. chengrunw66@yahoo.com.cn
authors.forename: Chengrun
authors.initials: C
authors.lastname: Wang
authors.forename: Xianwen
authors.initials: X
authors.lastname: Lu
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tian
authors.forename: Tao
authors.initials: T
authors.lastname: Cheng
authors.forename: Lingling
authors.initials: L
authors.lastname: Hu
authors.forename: Fenfen
authors.initials: F
authors.lastname: Chen
authors.forename: Chuanjun
authors.initials: C
authors.lastname: Jiang
authors.forename: Xiaorong
authors.initials: X
authors.lastname: Wang
mesh_terms: D002453:Cell Cycle / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D007811:Lanthanum / Q000494:pharmacology*; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism; D036226:Seedlings / Q000187:drug effects* / Q000378:metabolism*; D031307:Vicia faba / Q000187:drug effects* / Q000378:metabolism*
chemical_list: D007811:Lanthanum