Diagnosis and recommendation integrated system and nutritional balance index reveal Cd-induced nutritional disorders in Panicum maximum assayed for Cd phytoextraction

Autor(es)

Rabelo, Flavio Henrique Silveira ^[1] ; Lavres, Jose ^[2] ; Ramires, Thiago Gentil ^[3] ; Alleoni, Luis Reynaldo Ferracciu ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, BR-13418900 Piracicaba - Brazil

^[2] Univ Sao Paulo, Ctr Nucl Energy Agr, Piracicaba - Brazil

^[3] Fed Technol Univ Parana, Dept Math, Apucarana - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOREMEDIATION JOURNAL; v. 24, n. 4, p. 265-282, NOV 5 2020.
• Citações Web of Science: 0

Resumo

The identification of nutritional disorders in plants induced by cadmium (Cd), based only on nutrient concentration, can fail and conceal links with biochemical and physiological events. In this study, the diagnosis and recommendation integrated system (DRIS) and nutritional balance index (NBI) were evaluated as auxiliary tools for diagnosing nutritional disorders in two Panicum maximum genotypes (Tanzania and Massai) which have contrasting behaviors for Cd translocation from roots to shoot. The correlation between nutritional disorders and Cd translocation in these plants was also checked. N, P, K, Ca, Mg, S, Cu, Fe, Mn, and Zn concentrations in shoots of both grasses were extracted from studies previously published to form the database and develop DRIS, in which P. maximum cv. Tanzania was exposed to 0, 1, and 2 mmol L-1 of Cd, for eleven days, while P. maximum cv. Massai was exposed to 0, 0.1 and 0.5 mmol L-1 of Cd, for nine days. DRIS and NBI were obtained by calculations from nutrient concentrations in the shoot. Only P, S, and Zn concentrations in the shoot of P. maximum cv. Tanzania and P, K, S, Cu, and Fe in the shoot of P. maximum cv. Massai were Cd-disturbed from the point of view of nutrient concentration. However, DRIS revealed that the concentrations of Fe and Mn in the shoot of P. maximum cv. Tanzania exposed to Cd were considerably higher compared to other nutrients, enabling us to better understand certain biochemical and physiological Cd-induced events which occurred. Moreover, DRIS revealed that the Cd-induced nutritional disorders in the shoot of P. maximum cv. Massai were Cd-level dependent, and NBI confirmed that nutritional Cd-induced disorders in P. maximum increased when Cd translocation from roots to shoot was higher. In conclusion, DRIS and NBI revealed Cd-induced nutritional disorders that had previously been obscure. Therefore, their use as auxiliary tools for diagnosing Cd-induced nutritional disorders is recommended. (AU)

• Processo FAPESP: 14/18735-0 - Absorção radicular apoplástica e simplástica de 111Cd, estresse oxidativo e alterações ultra-estruturais em plantas de Panicum maximum supridas com enxofre
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• Modalidade de apoio: Auxílio à Pesquisa - Regular
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• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
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• Modalidade de apoio: Bolsas no Brasil - Mestrado
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• Modalidade de apoio: Bolsas no Brasil - Doutorado
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• Modalidade de apoio: Auxílio à Pesquisa - Regular
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• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado