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Your search keyword '"Freitas, Natália Chagas"' showing total 14 results
Start Over Author "Freitas, Natália Chagas" Publication Type Academic Journals
14 results on '"Freitas, Natália Chagas"'

14. LysM receptors in Coffea arabica: Identification, characterization, and gene expression in response to Hemileia vastatrix.

Author

Santos, Mariana de Lima, de Resende, Mário Lúcio Vilela, dos Santos Ciscon, Bárbara Alves, Freitas, Natália Chagas, Pereira, Matheus Henrique de Brito, Reichel, Tharyn, and Mathioni, Sandra Marisa

Subjects
COFFEE, GENE expression, PATTERN perception receptors, DISEASE resistance of plants, PLANT breeding
Abstract

Pathogen‐associated molecular patterns (PAMPs) are recognized by pattern recognition receptors (PRRs) localized on the host plasma membrane. These receptors activate a broad-spectrum and durable defense, which are desired characteristics for disease resistance in plant breeding programs. In this study, candidate sequences for PRRs with lysin motifs (LysM) were investigated in the Coffea arabica genome. For this, approaches based on the principle of sequence similarity, conservation of motifs and domains, phylogenetic analysis, and modulation of gene expression in response to Hemileia vastatrix were used. The candidate sequences for PRRs in C. arabica (Ca1-LYP, Ca2-LYP, Ca1-CERK1, Ca2-CERK1, Ca-LYK4, Ca1-LYK5 and Ca2-LYK5) showed high similarity with the reference PRRs used: Os-CEBiP, At-CERK1, At-LYK4 and At-LYK5. Moreover, the ectodomains of these sequences showed high identity or similarity with the reference sequences, indicating structural and functional conservation. The studied sequences are also phylogenetically related to the reference PRRs described in Arabidopsis, rice, and other plant species. All candidates for receptors had their expression induced after the inoculation with H. vastatrix, since the first time of sampling at 6 hours post‐inoculation (hpi). At 24 hpi, there was a significant increase in expression, for most of the receptors evaluated, and at 48 hpi, a suppression. The results showed that the candidate sequences for PRRs in the C. arabica genome display high homology with fungal PRRs already described in the literature. Besides, they respond to pathogen inoculation and seem to be involved in the perception or signaling of fungal chitin, acting as receptors or co-receptors of this molecule. These findings represent an advance in the understanding of the basal immunity of this species. [ABSTRACT FROM AUTHOR]

Published
2022
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