Adequate S supply reduces the damage of high Cd exposure in roots and increases N, S and Mn uptake by Massai grass grown in hydroponics

Autor(es)

Silveira Rabelo, Flavio Henrique ^{[1, 2]} ; Lux, Alexander ^[3] ; Rossi, Monica Lanzoni ^[1] ; Martinell, Adriana Pinheiro ^[1] ; Cuypers, Ann ^[2] ; Lavres, Jose ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416000 Piracicaba - Brazil

^[2] Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek - Belgium

^[3] Comenius Univ, Fac Nat Sci, Bratislava 84215 - Slovakia

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL AND EXPERIMENTAL BOTANY; v. 148, p. 35-46, APR 2018.
• Citações Web of Science: 8

Resumo

There are no studies showing the S effect on root development and nutrient uptake in forage grasses used for Cd phytoextraction. In this sense, our aim in this study was to evaluate in an integrated manner the effect of S supply (0.1, 1.9, and 3.7 mmol L-1) on root development and nutrient uptake of Panicum maximum Jacq. cv. Massai (Massai grass) exposed to Cd (0.1, and 0.5 mmol L-1), and the implications of this effect for Cd phytoextraction. Root development of Massai grass was strongly inhibited when plants were exposed to 0.5 mmol L-1 Cd, but adequate S supply (1.9 mmol L-1) allowed for higher Cd uptake. On the other hand, there was a greater development of roots when Massai grass was exposed to 0.1 mmol L-1 Cd, while some strategies to restrict Cd entry, such as deposition of suberin and lignin in the endodermis and G-layer development, were observed. Adequate supply of S to these plants increased root length, root surface, Cd transport from roots to stems + sheaths, and N, S, and Mn concentrations. (AU)

• Processo FAPESP: 15/21562-2 - Síntese de fitoquelatinas e expressão de genes envolvidos no controle do estresse oxidativo e na detoxificação de cádmio em Panicum maximum Jacq. cv. Tanzânia suprido com enxofre
• Beneficiário: Flávio Henrique Silveira Rabêlo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• 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
• Beneficiário: José Lavres Junior
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/16731-7 - Relação entre enxofre e os mecanismos de detoxificação de cádmio (111Cd) em plantas de Panicum maximum cv. Tanzânia
• Beneficiário: Flávio Henrique Silveira Rabêlo
• Modalidade de apoio: Bolsas no Brasil - Doutorado