Potential of hydrogen (pH) differentially modulates cadmium stress response in abscisic acid-deficient sitiens tomato mutant
| Autor: | Ricardo Antunes Azevedo, Felipe Gabriel Andrino, Priscila Lupino Gratão, Guilherme Bovi Ambrosano, Milca B. Vilhena, Simone Possedente de Lira, Rogério Falleiros Carvalho, Georgia Bertoni Pompeu |
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| Přispěvatelé: | Universidade de São Paulo (USP), Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Předmět: |
Materials Science (miscellaneous)
Glutathione reductase Micro-Tom chemistry.chemical_element medicine.disease_cause Superoxide dismutase chemistry.chemical_compound Solanum lycopersicum antioxidant enzymes medicine oxidative stress lcsh:Agriculture (General) Abscisic acid chemistry.chemical_classification Reactive oxygen species Cadmium TOMATE mineral nutrition biology fungi food and beverages APX lcsh:S1-972 Biochemistry chemistry biology.protein General Agricultural and Biological Sciences Oxidative stress Peroxidase |
| Zdroj: | Bragantia Bragantia v.78 n.3 2019 Instituto Agronômico de Campinas (IAC) instacron:IAC SciELO Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Bragantia, Issue: ahead, Published: 05 AUG 2019 |
| ISSN: | 0006-8705 |
| Popis: | Made available in DSpace on 2019-10-03T17:31:56Z (GMT). No. of bitstreams: 0 Previous issue date: 2019. Added 1 bitstream(s) on 2019-10-04T16:20:57Z : No. of bitstreams: 1 S0006-87052019005012102.pdf: 792286 bytes, checksum: b7b2c2e9fc72af00d140d2cb04bb0af5 (MD5) ABSTRACT Uptake of nutrients and cadmium (Cd) are dependent upon many factors, including plant species, ions concentration and pH. Tolerance to Cd-induced oxidative stress can be modulated by phytohormones such as abscisic acid (ABA), which induce the production of reactive oxygen species, activating proteins and enzymes involved in stress response and possibly stress tolerance. The present study aimed to evaluate the biochemical variations induced by Cd in ABA-deficient sitiens tomato mutant (sit) and its wild-type counterpart, Micro-Tom (MT), grown at different pH conditions. The plants were cultivated in nutrient solution (pH 5, 6 and 7; 20-days) and were then further grown over a 48-h period in 0 or 50 ?M CdCl2 at pH 6. Before Cd addition, the concentrations of nitrogen, sulfur, copper, iron and zinc were determined and variations in nutrients concentrations were observed. After Cd addition, sit roots grown at pH 5 and 7 did not exhibit differences in ascorbate peroxidase (APX) activity in 0 or 50 ?M CdCl2, and sit root grown at pH 6 exhibited lower glutathione reductase (GR) activity in the presence of Cd. Moreover, sit shoot grown at pH 5 showed decreased activities of superoxide dismutase (SOD), Mn-SOD II and Cu/Zn-SOD V, in 0 and 50 ?M CdCl2. The results indicated that pH modulates the plant nutrition in a complex way and may involve multiple ABA signaling pathways. Likewise, ABA status seems to be related with the Cd-translocation within the plant, suggesting that Cd, ABA and pH responses cannot be evaluated as isolated systems. Universidade de São Paulo Escola Superior de Agricultura Luiz de Queiroz Departamento de Genética Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Departamento de Biologia Aplicada à Agropecuária Universidade de São Paulo Escola Superior de Agricultura Luiz de Queiroz Departamento de Ciências Exatas Universidade Estadual Paulista Faculdade de Ciências Agrárias e Veterinárias Departamento de Biologia Aplicada à Agropecuária |
| Databáze: | OpenAIRE |
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