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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cadmium toxicity degree on tomato development is associated with disbalances in B and Mn status at early stages of plant exposure

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Author(s):
Amaral Carvalho, Marcia Eugenia [1] ; Piotto, Fernando Angelo [2] ; Franco, Monica Regina [1] ; Reis Borges, Karina Lima [1] ; Gaziola, Salete Aparecida [1] ; Camargo Castro, Paulo Roberto [3] ; Azevedo, Ricardo Antunes [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo Esalq USP, Dept Genet, Escola Super Agr Luiz Queiroz, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Sao Paulo Esalq USP, Dept Prod Vegetal, Escola Super Agr Luiz Queiroz, BR-13418900 Piracicaba, SP - Brazil
[3] Univ Sao Paulo Esalq USP, Dept Ciencias Biol, Escola Super Agr Luiz Queiroz, BR-13418900 Piracicaba, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ECOTOXICOLOGY; v. 27, n. 10, p. 1293-1302, DEC 2018.
Web of Science Citations: 9
Abstract

Cadmium (Cd) toxicity is frequently coupled to its accumulation in plants, but not always the highest Cd concentration triggers the worst damages, indicating that additional events influence the magnitude of Cd side-effects. We investigated the early mechanisms behind the differential Cd-induced impacts on plant development of four tomato accessions with contrasting tolerance to Cd toxicity. At organ level, the highest Cd concentration was not associated with the largest biomass losses. In leaves, changes in superoxide dismutase and catalase activities were not related to differences in Cd concentration, which was unable to provoke H2O2 overproduction on the sixth day of plant exposure to this metal. Further investigation in the mineral profile revealed that magnitude of Cd toxicity depends probably on synergic effects from increased B status, in addition to the own Cd accumulation. Furthermore, disbalances in Mn status (i.e., excess in leaves and deficiency in roots) may enhance Cd toxicity degree. According to data, however, the low magnesium (Mg) status can be linked to tomato tolerance against Cd toxicity. In conclusion, the tomato tolerance degree under short-Cd exposure depends on actively, finely regulation of mineral homeostasis that results in different development of plant organs. The better understanding on the mode of action of Cd toxicity in plants can help in the establishment of strategies to mitigate its impacts on crop yield. (AU)

FAPESP's process: 09/54676-0 - Oxidative stress induced by metals: new approaches
Grantee:Ricardo Antunes de Azevedo
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 13/15217-5 - INTEGRATED APPROACH OF ANATOMICAL, PHYSIOLOGICAL, BIOCHEMICAL AND MOLECULAR PARAMETERS FOR THE STUDY OF TOLERANCE MECHANISMS TO CADMIUM IN TOMATO ACCESSION
Grantee:Marcia Eugenia Amaral de Carvalho
Support Opportunities: Scholarships in Brazil - Doctorate