Rhizophagus irregularis modulates cadmium uptake

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se unió: 02/05/2021

Rhizophagus irregularis modulates cadmium uptake

Arbuscular mycorrhizal fungi (AMF) are considered a potential biotechnological tool for mitigating heavy metal (HM) toxicity. A greenhouse experiment was conducted to evaluate the impacts of the AM fungus Rhizophagus irregularis on cadmium (Cd) uptake, mycorrhizal colonization, and some plant growth parameters of Medicago sativa (alfalfa) in Cd-polluted soils. In addition, expression of two metal chelators (MsPCS1 (phytochelatin synthase) and MsMT2 (metallothionein)) and two metal transporter genes (MsIRT1 and MsNramp1) was analyzed using quantitative real-time PCR (qRT-PCR). Cd addition had a significant negative effect on mycorrhizal colonization. However, AMF symbiosis promoted the accumulation of biomass under both stressed and unstressed conditions compared with non-mycorrhizal (NM) plants. Results also showed that inoculation with R. irregularis significantly reduced shoot Cd concentration in polluted soils. Transcripts abundance of MsPCS1, MsMT2, MsIRT1, and MsNRAMP1 genes were downregulated compared with NM plants indicating that metal sequestration within hyphal fungi probably made Cd concentration insufficient in root cells for induction of these genes. These results suggest that reduction of shoot Cd concentration in M. sativa colonized by R. irregularis could be a promising strategy for safe production of this plant in Cd-polluted soils.To get more news about Emeramide for sale, you can visit fandachem.com official website.

The exposure to mercury was low for most of the population, however the tolerable weekly intake of methylmercury was exceeded by roughly 1.5 percent of 25 to 64-year-olds and 3 percent of 65 to 74-year-olds. For everyone studied, the intake of inorganic mercury was under the maximum tolerable weekly intake, which means the risk is insignificant.

For less than one per cent of the Finnish adult population, cadmium exposure exceeds the maximum tolerable weekly intake defined by the European Food Safety Authority (EFSA). Exceeding this maximum value may lead to kidney damage.

Cadmium exposure comes mainly from plant-based foods like cereals, vegetables and potatoes, since they are consumed often but concentrations are mostly not high.

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