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

Author(s)

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

Affiliation

^[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

• Document type: Journal article
• Source: ENVIRONMENTAL AND EXPERIMENTAL BOTANY; v. 148, p. 35-46, APR 2018.
• Web of Science Citations: 8

Abstract

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)

• FAPESP's process: 15/21562-2 - Synthesis of phytochelatins and expression of genes involved in the control of oxidative stress and in the cadmium detoxification in Panicum maximum Jacq. cv. Tanzania supplied with sulfur
• Grantee: Flávio Henrique Silveira Rabêlo
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 14/18735-0 - Root apoplastic and symplastic 111Cd-uptake, oxidative stress and ultra-structural changes in Panicum maximum plants supplied with sulfur
• Grantee: José Lavres Junior
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/16731-7 - Relationship between sulfur and cadmium (111Cd) detoxification mechanisms in Panicum maximum cv. Tanzania
• Grantee: Flávio Henrique Silveira Rabêlo
• Support Opportunities: Scholarships in Brazil - Doctorate