Tolerance of tomato to cadmium-induced stress: analyzing cultivars with different fruit colors

Autor(es)

Alcantara, Berenice Kussumoto ^[1] ; Carvalho, Marcia Eugenia Amaral ^[2] ; Gaziola, Salete Aparecida ^[2] ; Borges, Karina Lima Reis ^[2] ; Piotto, Fernando Angelo ^[2] ; Jacomino, Angelo Pedro ^[2] ; Azevedo, Ricardo Antunes ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Acre, Rodovia BR 364, Km 04, BR-69920900 Rio Branco, AC - Brazil

^[2] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz, Agron, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Science and Pollution Research; v. 28, n. 20, p. 26172-26181, MAY 2021.
• Citações Web of Science: 0

Resumo

The objective of the present study was to assess the response of tomato cultivars with different fruit colors to exposure to increasing Cd levels in the substrate by measuring the impacts of Cd on the oxidative stress indicators and physicochemical features of fruits, as well as plant development and yield components. A completely randomized experiment in a 3 x 3 factorial design {[}tomato cultivar (which produces purple, red, or white fruits) vs Cd level in the substrate (0, 3.6, or 12 mg kg(-1))] was performed. The cultivation of plants in substrate containing 3.6 mg kg(-1) Cd did not affect yield, but fruits exhibited nonpermissive Cd concentrations in both peel and mesocarp across all cultivars. By contrast, yield was decreased in plants with red and white fruits after their cultivation in substrate containing 12 mg kg(-1) Cd, while the productivity of plants with purple fruits was maintained under such conditions. The hydrogen peroxide content in the fruit mesocarp depended only on cultivar. However, an increased lipid peroxidation level was detected in the mesocarp of purple fruits at the highest Cd concentration. No parameters of fruit quality {[}i.e., diameter, length, degrees Brix, pH, titratable acidity, color (L{*}, a{*}, and b{*}), and concentrations of lycopene and beta-carotene in mesocarp] were affected by long-term exposure to Cd at 12 mg kg(-1). In conclusion, the results of this study suggested that the potential Cd side effects on diverse tomato quality features can be buffered at the fruit level because these features were maintained at the usual values despite high Cd concentrations in tomato peel and pulp. Moreover, these buffering mechanisms are independent of lycopene and beta-carotene concentrations in fruit peel, since the three tomato cultivars that were evaluated in the present study (white fruits, possessing no or negligible concentrations of these carotenoids, and red and purple tomato, possessing high lycopene and beta-carotene concentrations) were able to sustain several fruit quality parameters after long-term exposure to high Cd concentrations in the substrate. (AU)

• Processo FAPESP: 09/54676-0 - Estresse oxidativo induzido por metais: novas abordagens
• Beneficiário: Ricardo Antunes de Azevedo
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 15/26640-1 - Estudo dos mecanismos de tolerância ao cádmio em acessos de tomateiros: abordagens moleculares
• Beneficiário: Marcia Eugenia Amaral de Carvalho
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 13/15217-5 - Abordagem integrada de parâmetros anatômicos, fisiológicos, bioquímicos e moleculares para o estudo de mecanismos de tolerância ao cádmio em acessos de tomateiro
• Beneficiário: Marcia Eugenia Amaral de Carvalho
• Modalidade de apoio: Bolsas no Brasil - Doutorado