The effects of arsenic on the growth and nutritional status of Anadenanthera peregrina,a Brazilian savanna tree |
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| Authors: | Marcelo Pedrosa Gomes Daniela Moreira Duarte Pedro Luiz Silva Miranda Leilane Carvalho Barreto Miele Tallon Matheus Queila Souza Garcia |
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| Institution: | 1. Universidade Federal de Lavras. Departamento de Biologia, Campus UFLA, 37200‐000, Lavras, MG, Brazil;2. Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Botanica, Avenida Antonio Carlos, 6627, Pampulha, Caixa Postal 486, 31270‐970, Belo Horizonte, MG, Brazil;3. Plant Biology Postgraduate Program – UFMG;4. Universidade Federal do Espírito Santo, Departamento de Engenharia Florestal, Alto Universitário, Caixa Postal 16, Centro, 29.500‐000, Alegre, ES, Brazil |
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| Abstract: | Anadenanthera peregrina is a Brazilian savanna tree species that occurs naturally in arsenic (As)‐contaminated areas, and its As resistance has been associated with arbuscular mycorrhizal–fungi (AMF) symbiosis. A plant's ability to survive in stressful environments is correlated with its nutrition status, which can be affected by As uptake. The present study evaluated the influence of As on the concentrations and distribution of nutrients in the roots and shoots of A. peregrina grown in the absence of AMF. These plants were grown in substrates spiked with 0, 10, 50, and 100 mg As kg–1 for 25 d under greenhouse conditions, and the concentrations of essential macro‐ (P, K, Ca, Mg, N, and S) and micro‐ (Fe, Mn, Cu, Zn, B, and Mo) nutrients in the roots and shoots were then determined. Enhanced As levels increased the concentrations of P, S, and N and decreased Ca, Mg, and Fe. Although the deleterious effects of As on the plants were striking, the internal As levels were high, which indicated some tissue tolerance of A. peregrina. |
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| Keywords: | trace elements phytoremediation contamination phytotoxicity |
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