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+.

Bioaccumulation and effects of lanthanum on growth and mitotic index in soybean plants

“…The results of this study revealed that soybean can absorb significant amounts of La from nutrient solution, but only 3% is translocated from roots to shoot. Although few studies have published data on the translocation of La in soybean plants, similar results were reported for vascular plants, which had low concentration of REEs in shoots (Hu et al, 2002;Thomas et al, 2014;Tyler, 2004;Wang et al, 2011). In the present study, there was an increase of 3% in soybean root growth and 8% in shoot growth at low concentrations of La (Fig.…”

Involvement of reactive oxygen species in lanthanum-induced inhibition of primary root growth

“…The widespread use of REEs has caused their over-accumulation in soil and water (Wang et al , 2011; Biasioli et al , 2012; Wang et al , 2014). In addition, physiological studies have revealed that REEs have dual effects on plant growth, with low concentrations of REEs improving the growth and yield of crops and high concentrations of REEs having a harmful effect (Wang et al , 2014).…”

The Toxicity of Lanthanum and Cerium in Conditions of Biotest With Allium Cepa

“…Редкоземельные элементы способны в значительной степени накапливаться корнями растений (Wang et al, 2011a), однако задерживаются поясками Каспари (Nagahashi et al, 1974). Лантан и церий при этом оказывают негативное влияние на рост корня (Diatloff et al, 1995).…”