Effects of bisphenol A on growth and nitrogen nutrition of roots of soybean seedlings

Han

et al. 2015

Self Cite

Bisphenol A (BPA), an emerging pollutant in the environment, has potential toxic effects on plants. The toxicity mechanism, however, remains largely unknown. The antioxidant system plays an important role in protecting plants against the damage of stress. The present study investigated the effects of BPA on the antioxidant system (superoxide dismutase [SOD], peroxidase [POD], catalase [CAT], ascorbic acid [AsA], proline, reduced glutathione [GSH]), reactive oxygen species (ROS; hydrogen peroxide [H2 O2 ], superoxide anion [O2 (-) ]) accumulation, and membrane lipid peroxidation (malondialdehyde [MDA], cell membrane permeability) in soybean seedling roots. The 1.5 mg L(-1) BPA exposure did not affect test indices in the roots. Exposure to 3.0 mg L(-1) , 6.0 mg L(-1) , 12.0 mg L(-1) , or 24.0 mg L(-1) BPA caused increases in SOD (except for 3.0 mg L(-1) BPA) and CAT activities, as well as in AsA, proline, and GSH (except for 3.0 mg L(-1) BPA) content, leading to increases in the H2 O2 and O2 (-) content and to membrane lipid peroxidation. Exposure to 48.0 mg L(-1) or 96.0 mg L(-1) BPA caused decreases in the CAT activity and AsA/GSH content, as well as increases in the SOD and POD activities and the proline content, leading to excess ROS accumulation (i.e., H2 O2 and O2 (-) ) and cell membrane damage. After withdrawal of BPA exposure, ROS accumulation and membrane lipid peroxidation were alleviated by regulating a special antioxidant enzyme or substance.

Section: Acc E P Ted P R E P R I Ntmentioning

confidence: 99%

Effects of bisphenol A on antioxidant system in soybean seedling roots

Han

et al. 2015

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“…Therefore, nitrate assimilation in the soybean seedling roots that were treated with low‐concentration BPA was unchanged, whereas the single treatment with low‐concentration BPA promoted nitrate uptake (Figure A) . In this treatment, the improvement in soybean seedling root growth might be a result of the enhanced ammonia assimilation .…”

Section: Discussionmentioning

confidence: 94%

“…The combined treatment with the low‐concentration Cd and the high‐concentration BPA acts via similar mechanisms in plant cells as does the combined treatment with the high‐concentration Cd and the low‐concentration BPA (Table ). The combined treatment with the high‐concentration BPA and the high‐concentration Cd could synchronously inhibit the nitrate uptake and increase the ammonium accumulation and structural destruction of nitrate reductase and nitrite reductase, thereby decreasing the activities of nitrate reductase and nitrite reductase and, consequently, the inhibition of nitrate assimilation in soybean seedling roots (Figure ). Ultimately, soybean seedling root growth was inhibited (Table ).…”

Section: Discussionmentioning

confidence: 99%

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Combined effects of bisphenol A and cadmium on growth and nitrate assimilation of soybean seedling roots

Sun

et al. 2014

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Bisphenol A (BPA) and cadmium (Cd) pollution exist simultaneously in many regions. However, little information is available regarding the combined effects of BPA and Cd pollution on plants. Plant roots are in direct contact with the soil, which is an important compartment of BPA and Cd. In the present study, the effects of combined BPA and Cd pollution on soybean seedling roots were evaluated in pot experiments. Combined treatment with BPA and Cd at low concentrations (1.5 mg/kg BPA and 0.2 mg/kg Cd) improved soybean seedling root growth. However, other combined BPA and Cd treatments, including combined treatment with BPA (Cd) at the low concentration and Cd (BPA) at the high concentration as well as combined treatment with BPA and Cd at the high concentration, inhibited soybean seedling root growth. The improvement or inhibition of soybean seedling root growth was greater in the combined BPA and Cd treatments than in single treatments. The effects of the combined BPA and Cd treatments on root growth resulted from changes in nitrate assimilation. In addition, the combined effects of BPA and Cd on the nitrate and ammonium contents in roots are discussed. The present research provides a basic understanding of the combined effects of BPA and Cd pollution on plant roots.

“…), durum wheat and lettuce (Lactuca sativa L.) seedlings, moreover, root symptoms, including browning and the formation of jelly-like films, were also observed [12]. Some studies have demonstrated that treatment with 1.5 mg L -1 BPA promotes nitrogen assimilation in soybean (Glycine max L.) seedling roots [17,18] and…”

Section: Introductionmentioning

confidence: 94%

Effects of bisphenol A on mineral nutrition in soybean seedling roots

Nie

et al. 2014

Self Cite

Bisphenol A (BPA) is a ubiquitous chemical in the environment and potentially harmful to plants. However, relevant studies of the effects of BPA on plants are relatively scarce. In the present work, the effects of BPA on the biomass (fresh wt and dry wt), absorptive function (activity and absorptive area), and mineral element levels in soybean (Glycine max L.) seedling roots treated with 1.5 mg L(-1) , 3.0 mg L(-1) , 6.0 mg L(-1) , 12.0 mg L(-1) , 24.0 mg L(-1) , 48.0 mg L(-1) , and 96.0 mg L(-1) BPA were investigated. Treatment with 1.5 mg L(-1) BPA increased the levels of nitrate and other mineral elements (P, K, Mg, Mn, Zn, and Mo) in the roots, whereas treatments with BPA at higher concentrations decreased the levels of these elements in the roots. All treatments with BPA caused increases in the levels of ammonium, Ca, Fe, and Cu in the roots. Moreover, treatment with 1.5 mg L(-1) BPA increased the fresh weight, dry weight, activity, and absorptive area of the roots, whereas treatments with BPA at higher concentrations decreased these indices in a dose-dependent manner. Furthermore, correlation analysis data showed that BPA affected the levels of mineral elements and absorptive function of soybean seedling roots, which may be the physiological basis of BPA action on plants.