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Your search keyword '"Margis-Pinheiro, Márcia"' showing total 9 results
Start Over Author "Margis-Pinheiro, Márcia" Journal genetics and molecular biology
9 results on '"Margis-Pinheiro, Márcia"'

1. Genome-wide, evolutionary, and functional analyses of ascorbate peroxidase (APX) family in Poaceae species

Author

Jardim-Messeder, Douglas, primary, Caverzan, Andreia, additional, Bastos, Gabriel Afonso, additional, Galhego, Vanessa, additional, Souza-Vieira, Ygor de, additional, Lazzarotto, Fernanda, additional, Felix-Mendes, Esther, additional, Lavaquial, Lucas, additional, Nicomedes Junior, José, additional, Margis-Pinheiro, Márcia, additional, and Sachetto-Martins, Gilberto, additional

Published
2023
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2. Gene expression analysis reveals important pathways for drought response in leaves and roots of a wheat cultivar adapted to rainfed cropping in the Cerrado biome

Author

Poersch-Bortolon, Liane Balvedi, primary, Pereira, Jorge Fernando, additional, Nhani Junior, Antonio, additional, Gonzáles, Hebert Hernán Soto, additional, Torres, Gisele Abigail Montan, additional, Consoli, Luciano, additional, Arenhart, Rafael Augusto, additional, Bodanese-Zanettini, Maria Helena, additional, and Margis-Pinheiro, Márcia, additional

Published
2016
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9. Genome-wide, evolutionary, and functional analyses of ascorbate peroxidase (APX) family in Poaceae species.

Author

Jardim-Messeder D, Caverzan A, Bastos GA, Galhego V, Souza-Vieira Y, Lazzarotto F, Felix-Mendes E, Lavaquial L, Nicomedes Junior J, Margis-Pinheiro M, and Sachetto-Martins G

Abstract

Ascorbate peroxidases (APXs) are heme peroxidases involved in the control of hydrogen peroxide levels and signal transduction pathways related to development and stress responses. Here, a total of 238 APX, 30 APX-related (APX-R), and 34 APX-like (APX-L) genes were identified from 24 species from the Poaceae family. Phylogenetic analysis of APX indicated five distinct clades, equivalent to cytosolic (cAPX), peroxisomal (pAPX), mitochondrial (mitAPX), stromal (sAPX), and thylakoidal (tAPX) isoforms. Duplication events contributed to the expansion of this family and the divergence times. Different from other APX isoforms, the emergence of Poaceae mitAPXs occurred independently after eudicot and monocot divergence. Our results showed that the constitutive silencing of mitAPX genes is not viable in rice plants, suggesting that these isoforms are essential for rice regeneration or development. We also obtained rice plants silenced individually to sAPX isoforms, demonstrating that, different to plants double silenced to both sAPX and tAPX or single silenced to tAPX previously obtained, these plants do not show changes in the total APX activity and hydrogen peroxide content in the shoot. Among rice plants silenced to different isoforms, plants silenced to cAPX showed a higher decrease in total APX activity and an increase in hydrogen peroxide levels. These results suggest that the cAPXs are the main isoforms responsible for regulating hydrogen peroxide levels in the cell, whereas in the chloroplast, this role is provided mainly by the tAPX isoform. In addition to broadening our understanding of the core components of the antioxidant defense in Poaceae species, the present study also provides a platform for their functional characterization.

Published
2022
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