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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gene expression analysis identifies hypothetical genes that may be critical during the infection process of Xanthomonas citri subsp. citri

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Author(s):
de Laia, Marcelo Luiz [1] ; Moreira, Leandro Marcio [2, 3] ; Goncalves, Janaina Fernandes [4] ; Tiraboschi Ferro, Maria Ines [5] ; Pinto Rodrigues, Any Caroliny [1] ; dos Santos, Jessica Naiara [1] ; Felestrino, Erica Barbosa [3] ; Ferro, Jesus Aparecido [5]
Total Authors: 8
Affiliation:
[1] Univ Fed Vales do Jequitirthonha e Mucuri, Fac Ciencias Agr, Dept Engn Florestal, Diamantina, MG - Brazil
[2] Univ Fed Ouro Preto, Inst Ciencias Exatas & Biol, Dept Ciencias Biol, Ouro Preto, MG - Brazil
[3] Univ Fed Ouro Preto, Ouro Preto, Nucleo Pesquisas Ciencias Biol, Ouro Preto, MG - Brazil
[4] Univ Fed Vales do Jequitirthonha e Mucuri, Inst Ciencias Agr, Unai, MG - Brazil
[5] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Tecnol, Campus Jaboticabal, Jaboticabal, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: ELECTRONIC JOURNAL OF BIOTECHNOLOGY; v. 42, p. 30-41, NOV 2019.
Web of Science Citations: 0
Abstract

Background: Gene expression analysis via microarray is widely used in phytobacteria to validate differential gene expression associated with virulence or to compare biological profiles of wild type and mutant strains. Here, we employed DNA microarrays to study the early stages of the infection process (24, 72 and 120 h post-inoculation) of Xanthomonas citri subsp. citri (Xac) infecting Citrus sinensis to interrogate the expression profiles of hypothetical genes. Results: Under infective conditions, 446 genes were up-and 306 downregulated. Outstanding among genes upregulated during infection were those involved in synthesizing the Type 3 Secretion System and effectors, xanthan gum and quorum-sensing induction, and flagellum synthesis and regulation. Additionally, 161 hypothetical genes were up-and 100 were downregulated, 49 of which are known to have a significant biological role. To understand hypothetical gene co-regulation or -expression, nine expression profiles including 158 genes were identified during the three infection phases. Of these, 47 hypothetical genes were identified as having expression profiles associated with at least one connected to a gene associated with adaptation and virulence. Conclusions: Expression patterns of six differentially expressed genes were validated by quantitative reverse transcription polymerase chain reaction, thus demonstrating the effectiveness of this tool in global gene expression analysis in Xac. (C) 2019 Pontificia Universidad Catolica de Valparaiso. Production and hosting by Elsevier B.V. All rights reserved. (AU)