In situ arsenic speciation at the soil/water interface of saline-alkaline lakes of the Pantanal, Brazil: A DGT-based approach

Viana, José Lucas Martins; Souza, Adriana Félix de; Hernández, Amauris Hechavarría; Elias, Lucas Pellegrini; Eismann, Carlos Eduardo; Rezende-Filho, Ary Tavares; Barbiéro, Laurent; Menegário, Amauri Antônio; Fostier, Anne Hélène

doi:10.1016/j.scitotenv.2021.150113

Cited by 15 publications

(1 citation statement)

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“…Arsenic exists in various chemical forms in the environment, including inorganic species like arsenite (As(III)) and arsenate (As(V)), as well as organic species such as monomethylarsonic acid (MMA), dimethylarsinic acid (DMA), trimethylarsine (TMA), arsenocholine (AsC), arsenobetaine (AsB), and arsenosugars [10]. In natural wetlands, the primary forms of As are inorganic As(III) and As(V), which undergo dynamic interconversion due to fluctuating water table and redox conditions [11]. Moreover, distinct As species exhibit differences in the mobility, bioavailability, and phytotoxicity to plants [12].…”

Section: Introductionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi Alter Arsenic Translocation Characteristics of Iris tectorum Maxim.

Xing,

Zhang,

Hao

et al. 2023

JoF

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Arsenic (As) pollution in wetlands, mainly as As(III) and As(V), has threatened wetland plant growth. It has been well documented that arbuscular mycorrhizal (AM) fungi can alleviate As stress in terrestrial plants. However, whether AM fungi can protect natural wetland plants from As stress remains largely unknown. Therefore, three hydroponic experiments were conducted in which Iris tectorum Maxim. (I. tectorum) plants were exposed to As(III) or As(V) stresses, to investigate the effects of mycorrhizal inoculation on As uptake, efflux, and accumulation. The results suggested that short-term kinetics of As influx in I. tectorum followed the Michaelis–Menten function. Mycorrhizal inoculation decreased the maximum uptake rate (Vmax) and Michaelis constant (Km) of plants for As(III) influx, while yielding no significant difference in As(V) influx. Generally, mycorrhizal plants released more As into environments after 72 h efflux, especially under As(V) exposure. Moreover, mycorrhizal plants exhibited potential higher As accumulation capacity, probably due to more active As reduction, which was one of the mechanisms through which AM fungi mitigate As phytotoxicity. Our study has revealed the role of aerobic microorganism AM fungi in regulating As translocation in wetland plants and supports the involvement of AM fungi in alleviating plant As stress in anaerobic wetlands.

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Section: Introductionmentioning

confidence: 99%