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Your search keyword '"do Amaral, Marcelo Nogueira"' showing total 27 results
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27 results on '"do Amaral, Marcelo Nogueira"'

8. Cross-stress memory: Salt priming at vegetative growth stages improves tolerance to drought stress during grain-filling in rice plants

Author

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, Rossatto, Tatiana [0000-0002-8021-5567], Souza, Gustavo Maia [0000-0001-6754-4860], do Amaral, Marcelo Nogueira [0000-0003-3180-7803], Auler, Priscila Ariane [0000-0001-9045-7626], Pérez-Alonso, Marta Marina [0000-0003-4118-4822], Pollmann, Stephan [0000-0002-5111-4425], Braga, Eugenia Jacira Bolacel [0000-0001-6364-7934], Rossatto, Tatiana, Souza, Gustavo Maia, do Amaral, Marcelo Nogueira, Auler, Priscila Ariane, Pérez-Alonso, Marta-Marina, Pollmann, Stephan, Braga, Eugenia Jacira Bolacel, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, Rossatto, Tatiana [0000-0002-8021-5567], Souza, Gustavo Maia [0000-0001-6754-4860], do Amaral, Marcelo Nogueira [0000-0003-3180-7803], Auler, Priscila Ariane [0000-0001-9045-7626], Pérez-Alonso, Marta Marina [0000-0003-4118-4822], Pollmann, Stephan [0000-0002-5111-4425], Braga, Eugenia Jacira Bolacel [0000-0001-6364-7934], Rossatto, Tatiana, Souza, Gustavo Maia, do Amaral, Marcelo Nogueira, Auler, Priscila Ariane, Pérez-Alonso, Marta-Marina, Pollmann, Stephan, and Braga, Eugenia Jacira Bolacel

Abstract

The pre-exposure of plants to a potentially stressful condition can stimulate tolerance to subsequent stresses, a phenomenon associated with memory in plants. When the stimuli have different natures, a cross-tolerance phenomenon can take place. The objective of this study was to investigate whether the pre-exposure of rice plants to a saline stimulus at the vegetative stage has the potential to mitigate the effects of a drought event during grain-filling. By evaluating the transcriptional and physiological (e.g. hormones, gas exchange, growth parameters) responses, this study seek to identify likely long-term memory mechanisms. Therefore, rice plants were exposed to a pre-treatment in the vegetative stage induced by 150 mM NaCl solution for four days and then subjected to 16 days of water deficit in the reproductive stage. Physiological parameters were evaluated and the endogenous levels of the plant hormones abscisic acid (ABA), salicylic acid (SA) and jasmonic acid (JA) and RNA-sequencing (RNA-Seq) was measured to investigate transcriptional profiles of rice plants subjected to cross-stress. The results demonstrated that primed plants challenged by water stress during the grain-filling stage showed less electrolyte leakage, less damage to the photosynthetic apparatus and increased root growth. The higher ABA concentration in leaves was closely related to the above physiological responses. Along with JA and SA, ABA can be a determinant of long-term stress memory in rice. The annotation of specific cross-tolerance genes pointed to signaling and synthesis of hormones, photosynthesis, stomatal conductance, antioxidant system, glyoxylate cycle and transcription factors. It is concluded that priming with salt in the vegetative stage can mitigates the effects of drought during the reproductive stage at the transcriptional, physiological and hormonal levels.

Published
2023

10. Selection of Optimal Reference Genes and Transcriptional Regulation of Betalamic Pigments in Two Congeneric Species of Alternanthera Elicited with Methyl Jasmonate

Author

Milech, Cristini, primary, do Amaral, Marcelo Nogueira, additional, Lucho, Simone Ribeiro, additional, Auler, Priscila Ariane, additional, Rossatto, Tatiana, additional, dos Santos, Jaqueline da Silva, additional, Bianchi, Valmor João, additional, and Braga, Eugenia Jacira Bolacel, additional

Published
2023
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19. Betalain accumulation and de novo transcriptome sequencing reveal the potential to increase bioactive compounds in Alternanthera sessilis elicited by methyl jasmonate

Author

Milech, Cristini, primary, do Amaral, Marcelo Nogueira, additional, Auler, Priscila Ariane, additional, Lucho, Simone Ribeiro, additional, Kleinowski, Alítcia Moraes, additional, da Maia, Luciano Carlos, additional, Bianchi, Valmor João, additional, and Braga, Eugenia Jacira Bolacel, additional

Published
2022
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23. Stress memory of physiological, biochemical and metabolomic responses in two different rice genotypes under drought stress: The scale matters

Author

Auler, Priscila Ariane, primary, Souza, Gustavo Maia, additional, da Silva Engela, Marcela Regina Gonçalves, additional, do Amaral, Marcelo Nogueira, additional, Rossatto, Tatiana, additional, da Silva, Maria Gabriella Ziglio, additional, Furlan, Cláudia Maria, additional, Maserti, Biancaelena, additional, and Braga, Eugenia Jacira Bolacel, additional

Published
2021
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24. Cold tolerance response mechanisms revealed through comparative analysis of gene and protein expression in multiple rice genotypes

Author

de Freitas, Gabriela Moraes, primary, Thomas, Julie, additional, Liyanage, Rohana, additional, Lay, Jackson O., additional, Basu, Supratim, additional, Ramegowda, Venkategowda, additional, do Amaral, Marcelo Nogueira, additional, Benitez, Letícia Carvalho, additional, Bolacel Braga, Eugenia Jacira, additional, and Pereira, Andy, additional

Published
2019
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27. Long-term somatic memory of salinity unveiled from physiological, biochemical and epigenetic responses in two contrasting rice genotypes.

Author

do Amaral MN, Auler PA, Rossatto T, Barros PM, Oliveira MM, and Braga EJB

Subjects
Epigenesis, Genetic, Gene Expression Regulation, Plant, Genotype, Salinity, Stress, Physiological, Oryza genetics
Abstract

Plants are constantly exposed to environmental fluctuations, that may occur in a single day or over longer periods. In many cases, abiotic stresses are transient and recurrent, impacting how plants respond in subsequent adverse conditions. Adaptation mechanisms may occur at the physiological, biochemical and molecular level, modifying transcriptional response, regulatory proteins, epigenetic marks or metabolites. Here, we aimed to uncover the different strategies that rice uses to respond to recurrent stress. We tested varieties with contrasting behavior towards salinity (tolerance or sensitivity) and imposed salt stress (150 mM NaCl) during 48 h at vegetative and/or reproductive stages. After 48 h of stress in reproductive stage, leaves and roots were harvested separately or otherwise the plants were submitted to a 24 h recovery, prior to sample harvesting. Plants submitted to a recurrent stress responded differently from those suffering a single stress event. In the case of the sensitive genotype, recurrent stress led to lower Na/K ratio in roots and lower hydrogen peroxide accumulation and lipid peroxidation in leaves, but maintenance of global DNA methylation levels. In the tolerant genotype, recurrent stress did neither affect the Na/K ratio nor the stomatal conductance, although the levels of superoxide anion and hydrogen peroxide accumulation were lower, as also observed for global levels of DNA methylation. Our work shows that a short pre-exposure to salt stress may improve rice tolerance to subsequent stress, trough biochemical, physiological and epigenetic processes, with more significant changes visible in the tolerant genotype., (© 2020 Scandinavian Plant Physiology Society.)

Published
2020
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