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Cadmium bioavailability in an Oxisol (Typic Hapludox) and its relation with the tolerance of Brachiaria decumbens and Panicum maximum using Noccaea caerulescens as model plant

Grant number: 17/11299-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): March 01, 2018
Effective date (End): February 28, 2022
Field of knowledge:Agronomical Sciences - Agronomy - Soil Science
Principal researcher:Luís Reynaldo Ferracciú Alleoni
Grantee:Flávio Henrique Silveira Rabêlo
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated scholarship(s):18/07190-3 - Bacterial communities in the rhizosphere of Brachiaria decumbens, Panicum maximum and Noccaea caerulescens used for cadmium phytoextraction in an Oxisol (Typic Hapludox), BE.EP.PD

Abstract

Cd concentrations in agricultural soils in the humid tropics can represent a serious socio-environmental problem, since Cd is toxic for most plants, animals and humans. However, it is possible to reduce the Cd concentration in the soils by phytoremediation, especially if we understand how the Cd bioavailability in the soils can be influenced by the cultivation of phytoremediation plants of this metal in different climatic seasons. Thus, our objective with this study will be to evaluate the Cd bioavailability in an Oxisol cultivated with Brachiaria decumbens Stapf. cv. Basilisk and Panicum maximum Jacq. cv. Massai, in different climatic seasons (summer and winter conditions). The relationships between the Cd bioavailability and the tolerance mechanisms of these plants that favor the Cd accumulation will be evaluated, in order to optimize the process of Cd phytoremediation, by using Noccaea caerulescens (J. & C. Presl) F.K. Mey as a model plant. Plants of Brachiaria decumbens cv. Basilisk, Panicum maximum cv. Massai and Noccaea caerulescens will be cultivated in an Oxisol contaminated with Cd (3.6 mg kg-1 soil) during a single growing period in each climatic seasons. Then, the following procedures will be carried out in soil samples: (i) physicochemical and geochemical analyzes (in synchrotron light), (ii) determinations of Cd concentrations and Cd fractionation in the soil, (iii) calculations of factors related to Cd phytoextraction, (iv) determinations of the contents of nutrients and Cd in plants (including Cd in apoplast and symplast in the roots), (v) measurement of root length and root surface, (vi) measurement of reduced glutathione (GSH) and phytochelatins (PCs) concentrations, (vii) measurement of malondialdehyde concentration and of the activity of the enzymes superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX) and glutathione reductase (GR), and (viii) measurement of photosynthetic variables.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RABELO, FLAVIO HENRIQUE SILVEIRA; LAVRES, JOSE; RAMIRES, THIAGO GENTIL; ALLEONI, LUIS REYNALDO FERRACCIU. Diagnosis and recommendation integrated system and nutritional balance index reveal Cd-induced nutritional disorders in Panicum maximum assayed for Cd phytoextraction. BIOREMEDIATION JOURNAL, v. 24, n. 4 NOV 2020. Web of Science Citations: 0.
SILVEIRA RABELO, FLAVIO HENRIQUE; BORGO, LUCELIA; MERLOTI, LUIS FERNANDO; PYLRO, VICTOR SATLER; NAVARRETE, ACACIO APARECIDO; MANO, RODRIGO HIDEKI; THIJS, SOFIE; VANGRONSVELD, JACO; FERRACCIU ALLEONI, LUIS REYNALDO. Effects of winter and summer conditions on Cd fractionation and bioavailability, bacterial communities and Cd phytoextraction potential of Brachiaria decumbens and Panicum maximum grown in a tropical soil. Science of The Total Environment, v. 728, AUG 1 2020. Web of Science Citations: 1.
SILVEIRA RABELO, FLAVIO HENRIQUE; GAZIOLA, SALETE APARECIDA; ROSSI, MONICA LANZONI; SILVEIRA, NEIDIQUELE MARIA; WOJCIK, MALGORZATA; BAJGUZ, ANDRZEJ; PIOTROWSKA-NICZYPORUK, ALICJA; LAVRES, JOSE; LINHARES, FRANCISCO SCAGLIA; AZEVEDO, RICARDO ANTUNES; VANGRONSVELD, JACO; FERRACCIU ALLEONI, LUIS REYNALDO. Unraveling the mechanisms controlling Cd accumulation and Cd-tolerance inBrachiaria decumbensandPanicum maximumunder summer and winter weather conditions. PHYSIOLOGIA PLANTARUM, AUG 2020. Web of Science Citations: 0.

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