Na+/H+ antiporter (NHX1) positively enhances cadmium (Cd) resistance and decreases Cd accumulation in tobacco plants cultivated in Cd-containing soil

Wang, Gang; Da-yuan, Yang; Zhang, Yue; Li, Qian; Ji, Jing; Chen, Jin; Wu, Guangxia; Guan, Chunfeng

doi:10.1007/s11104-020-04601-5

Cited by 11 publications

(1 citation statement)

References 86 publications

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“…Exposure to NaCl stimulates the lignification of root epidermis, creating a physical barrier that reduces heavy metal uptake (Cheng et al 2012 ). Salinity causes enhanced expression of antiporters NHX1 (Na + /H + antiporter) and CaCA (Ca 2+ /cation antiporter superfamily) in plants which promotes Cd tolerance (Wang et al 2020 ; Zheng et al 2021 ). Additionally, decreased Cd bioavailability due to the formation of Cd-Cl − complexes can explain the reduced Cd uptake at increased salinity levels (Greger et al 1995 ; Mei et al 2014 ).…”

Section: Discussionmentioning

confidence: 99%

Salinity and temperature influence removal levels of heavy metals and chloride from water by wetland plants

Schück

Greger

2023

Environ Sci Pollut Res

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Stormwater with low temperatures and elevated salinity, common in areas where deicing salt is used, might affect the removal of heavy metals by plants in stormwater treatment systems such as floating treatment wetlands. This short-term study evaluated the effects of combinations of temperature (5, 15, and 25 °C) and salinity (0, 100, and 1000 mg NaCl L−1) on the removal of Cd, Cu, Pb, and Zn (1.2, 68.5, 78.4, and 559 μg L−1) and Cl− (0, 60, and 600 mg Cl− L−1) by Carex pseudocyperus, C. riparia, and Phalaris arundinacea. These species had previously been identified as suitable candidates for floating treatment wetland applications. The study found high removal capacity in all treatment combinations, especially for Pb and Cu. However, low temperatures decreased the removal of all heavy metals, and increased salinity decreased the removal of Cd and Pb but had no effect on the removal of Zn or Cu. No interactions were found between the effects of salinity and of temperature. Carex pseudocyperus best removed Cu and Pb, whereas P. arundinacea best removed Cd, Zu, and Cl−. The removal efficacy for metals was generally high, with elevated salinity and low temperatures having small impacts. The findings indicate that efficient heavy metal removal can also be expected in cold saline waters if the right plant species are used.

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