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Title: | Enzymatic antioxidants-Relevant or not to protect the photosynthetic system against cadmium-induced stress in Massai grass supplied with sulfur? | Authors: | SILVEIRA RABELO, Flavio de Alcantara da Silva, Berenice Kussumoto BORGO, Lucelia KEUNEN, Els Rossi, Monica Lanzoni Lima Reis Borges, Karina dos Santos, Elcio Ferreira dos Reise, Andre Rodrigues Martinelli, Adriana Pinheiro Azevedo, Ricardo Antunes CUYPERS, Ann Lavres, Jose |
Issue Date: | 2018 | Publisher: | PERGAMON-ELSEVIER SCIENCE LTD | Source: | Environmental and experimental botany, 155, p. 702-717 | Abstract: | Exposure to cadmium (Cd) can cause oxidative stress and injuries to the photosynthetic apparatus of plants. Otherwise, plant metabolism impaired by Cd toxicity can be aided by a proper sulfur (S) nutrition, since S is a component of antioxidants and photosynthetic systems. In this sense, our aim in this study was to evaluate the effect of S supply (0.1, 1.9 and 3.7 mmol L-1) on the antioxidant and photosynthetic systems of Massai grass exposed to Cd (0.0, 0.1 and 0.5 mmol L-1) as a prerequisite for studies of Cd phytoextraction. Plants supplied with 3.7 mmol L-1 S showed the lowest growth and the highest Cd concentrations when exposed to 0.5 mmol L-1 Cd. However, Massai grass grown without S deprivation showed the highest GSH + GSSG concentrations in all tissues and the lowest lipid peroxidation in stems and sheaths and roots. In general, the activities of SOD, CAT, APX, GPOX and GR did not increase in Massai grass exposed to Cd, even with proper S supply. Severe Cd exposure halted the photosynthetic system of Massai grass, although well-nourished plants with S exhibited greatest photosynthetic rate probably due to the action of GSH in the control of the oxidative stress. | Notes: | [Silveira Rabelo, Flavio Henrique; Rossi, Monica Lanzoni; dos Santos, Elcio Ferreira; Martinelli, Adriana Pinheiro; Lavres, Jose] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416000 Piracicaba, Brazil. [Silveira Rabelo, Flavio Henrique; Borgo, Lucelia; Keunen, Els; Cuypers, Ann] Hasselt Univ, Ctr Environm Sci, B-3590 Diepenbeek, Belgium. [de Alcantara da Silva, Berenice Kussumoto] Univ Fed Acre, BR-69920900 Rio Branco, Brazil. [Borgo, Lucelia; Lima Reis Borges, Karina; Azevedo, Ricardo Antunes] Univ Sao Paulo, Luiz de Queiroz Coll Agr, BR-13418900 Piracicaba, Brazil. [dos Reise, Andre Rodrigues] Sao Paulo State Univ, BR-17602496 Tupa, Brazil. | Keywords: | Antioxidants; Cadmium; Panicum maximum; Photosynthesis; Tolerance mechanisms;Antioxidants; cadmium; panicum maximum; photosynthesis; tolerance mechanisms | Document URI: | http://hdl.handle.net/1942/28715 | ISSN: | 0098-8472 | e-ISSN: | 1873-7307 | DOI: | 10.1016/j.envexpbot.2018.08.020 | ISI #: | 000446289500067 | Rights: | 2018 Elsevier B.V. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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