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Open AccessArticle

Transcriptome Analysis Identifies Candidate Target Genes Involved in Glyphosate-Resistance Mechanism in Lolium multiflorum

1
Department of Crop Protection, Federal University of Pelotas, Pelotas, RS 96160-000, Brazil
2
Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996, USA
3
Center for Technological Development, Federal University of Pelotas (UFPel), Pelotas, RS 96010-610, Brazil
4
Department of Plant Breeding, Federal University of Pelotas (UFPel), Pelotas, RS 96010-610, Brazil
5
Department of Weed Science, Brazilian Agricultural Research Corporation (Embrapa), Passo Fundo, RS 99050-970, Brazil
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Plants 2020, 9(6), 685; https://doi.org/10.3390/plants9060685
Received: 2 May 2020 / Revised: 23 May 2020 / Accepted: 24 May 2020 / Published: 28 May 2020
Italian ryegrass (Lolium multiflorum; LOLMU) is one of the most troublesome weeds in temperate regions in the world. This weed species interfere with wheat, corn, rye, and oat, causing significant crop yield losses. This species has evolved glyphosate resistance, making it difficult to control. The mechanisms of glyphosate resistance are still unknown, and an understanding thereof will favor the development of new strategies of management. The present study is the first transcriptome study in LOLMU using glyphosate-resistant and -sensitive biotypes, aiming to identify and to provide a list of the candidate target genes related to glyphosate resistance mechanism. The transcriptome was assembled de novo, producing 87,433 contigs with an N50 of 740 bp and an average length of 575 bp. There were 92 and 54 up- and down-regulated genes, respectively, in the resistant biotype, while a total of 1683 were differentially expressed in the sensitive biotype in response to glyphosate treatment. We selected 14 highly induced genes and seven with repressed expression in the resistant biotype in response to glyphosate. Of these genes, a significant proportion were related to the plasma membrane, indicating that there is a barrier making it difficult for glyphosate to enter the cell. View Full-Text
Keywords: Italian ryegrass; next-generation sequencing; RNA-Seq; differential gene expression; resistance mechanism Italian ryegrass; next-generation sequencing; RNA-Seq; differential gene expression; resistance mechanism
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MDPI and ACS Style

Cechin, J.; Piasecki, C.; Benemann, D.P.; Kremer, F.S.; Galli, V.; Maia, L.C.; Agostinetto, D.; Vargas, L. Transcriptome Analysis Identifies Candidate Target Genes Involved in Glyphosate-Resistance Mechanism in Lolium multiflorum. Plants 2020, 9, 685.

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