The physiological response of Mirabilis jalapa Linn. to lead stress and accumulation

Wang, Jun; Sheng, Ye; Xue, Rui; Hartley, William; Wu, Hao; Shi, Lizheng

doi:10.1016/j.ibiod.2016.04.030

Cited by 32 publications

(5 citation statements)

References 19 publications

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“…These values are close to those in a previous study 4 , in which the BCF of B obtained for L. minor and L. gibba was ~350 and ~425 respectively, at 2 mg B/L. Two criteria, the BCF and the translocation factor (TF, shoot or leaf concentration/root concentration), have been used to identify the hyperaccumulation of an element 35 , 36 . When both BCF and TF exceed 1.0, hyperaccumulation is thought to occur 37 .…”

Section: Resultssupporting

confidence: 86%

Boron accumulation by Lemna minor L. under salt stress

Zheng

et al. 2018

Sci Rep

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Excess boron (B) is toxic to aquatic organisms and humans. Boron is often present in water with high salinity. To evaluate the potential of duckweed (Lemna minor L.) for removing B from water under salt stress, we cultured duckweed in water with 2 mg/L of B and sodium chloride (NaCl) concentrations ranging from 0 to 200 mM for 4 days. The results show that with increasing salinity, the capacity of L. minor to accumulate B initially decreased and then increased. L. minor used different mechanisms to accumulate boron at lower and higher levels of salt stress. The growth and chlorophyll synthesis of L. minor were significantly inhibited when the concentration of NaCl reached 100 mM. Our results suggest that L. minor is suitable for the accumulation of B when NaCl salinity is below 100 mM.

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Section: Resultssupporting

confidence: 86%

Boron accumulation by Lemna minor L. under salt stress

Zheng

et al. 2018

Sci Rep

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“…Each treatment was replicated three times. The process of collection and pretreatment of P. perfoliatum followed the standard procedure of Wang et al (2016).…”

Section: Hydroponics Culturementioning

confidence: 99%

Physiological response of Polygonum perfoliatum L. following exposure to elevated manganese concentrations

Xue

Wang

et al. 2016

Environ Sci Pollut Res

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Polygonum perfoliatum L. is a Mn-tolerant plant as considered having the potential to revegetate in manganese mine wasteland. The glasshouse experiments were carried out to evaluate its tolerance and physiological response in different Mn concentrations (5, 500, 1000, 2000, 5000, and 10,000 μmol L). Absorption bands of P. perfoliatum differed greatly in lipids, proteins, and carbohydrates. With elevated levels of Mn (5-2000 μmol L), absorbance changed little, which demonstrated that lower Mn concentrations had negligible influence on transport functions. As Mn concentrations in excess of 2000 μmol L, absorbance increased slightly but eventually decreased. Furthermore, a hydroponic culture was carried out in order to study its changes of ultrastructure with the increasing Mn concentrations (5, 1000, and 10,000 μmol L). Lower Mn levels with 5 and 1000 μmol L had no breakage function to the ultrastructure of P. perfoliatum. However, as Mn concentration was up to 10,000 μmol L, visible damages began to appear, the quantity of mitochondria in root cells increased, and the granum lamellae of leaf cell chloroplasts presented a disordered state. In comparison with the controls, black agglomerations were found in the cells of P. perfoliatum under the controlling concentration of Mn with 1000 and 10,000 μmol L for 30 days, which became obvious at higher Mn concentrations. As Mn concentration was 10,000 μmol L, a kind of new acicular substance was developed in leaf cells and intercellular spaces, possibly indicating a resistance mechanism in P. perfoliatum. These results confirm that P. perfoliatum shows potential for the revegetation of abandoned manganese tailings.

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“…Heavy metals accumulation through food chain has adverse effect on human health 4,5 . Among trace metals Cd and Pb are most phytotoxic that inhibits plant growth and enter food chain through plant uptake from contaminated soil 6 . Cadmium and Pb are categorized as most hazardous metals by United States Environmental Protection Agency (US-EPA) 7 .…”

Section: Introductionmentioning

confidence: 99%

Immobilization of cadmium and lead in contaminated paddy field using inorganic and organic additives

Hamid

Tang

Wang

et al. 2018

Sci Rep

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Heavy metal contamination of agricultural soils has posed a risk to environment and human health. The present study was conducted to assess the effectiveness of soil amendments for reducing cadmium (Cd) and lead (Pb) uptake by rice (Oryza sativa L) in a contaminated field. The soil amendments used include lime, DaSan Yuan (DASY), DiKang No.1 (DEK1), biochar, Fe-biochar, Yirang, phosphorus fertilizer, (Green Stabilizing Agent) GSA-1, GSA-2, GSA-3, and GSA-4, applied at 1% rate in a field experiment. The results exposed that GSA-4 treatment showed best effects on reducing Cd and Pb phytoavailability in soil and uptake by early rice. Linear increase in pH (i.e. 5.69 to 6.75) was recorded in GSA-4 amended soil from sowing to the 3rd month of growth season. GSA-4 decreased DTPA extractable contents of cadmium (Cd) from 0.324 to 0.136 mg kg−1 soil and lead (Pb) from 53.21 to 24.68 mg kg−1 soil at 90 days of amendment. Treatment with GSA-4 improved rice growth (56%) and grains yield (42%). The enhancement effects on grain yield may be result from the positive effects of GSA-4 application on increasing photosynthesis (116%) and transpiration rate (152%) as compared to the control. Significant reduction in Cd and Pb uptake in shoot (42% and 44%) and in grains (77 and 88%), was observed, respectively in GSA-4 treatment as compared with the control. Moreover, negative correlation was recorded between DTPA extractable Cd/Pb and soil pH that directly depended on applied amendments. In short, use of combined amendment (GSA-4) was more effective for immobilizing heavy metals in contaminated paddy field, and secures rice safe production, as compared other tested amendment products.

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The physiological response of Mirabilis jalapa Linn. to lead stress and accumulation

Cited by 32 publications

References 19 publications

Boron accumulation by Lemna minor L. under salt stress

Boron accumulation by Lemna minor L. under salt stress

Physiological response of Polygonum perfoliatum L. following exposure to elevated manganese concentrations

Immobilization of cadmium and lead in contaminated paddy field using inorganic and organic additives

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