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Agriculture 2018, 8(1), 17;

Involvement of Epigenetic Mechanisms in Herbicide Resistance: The Case of Conyza canadensis

Laboratory of Weed Science, Benaki Phytopathological Institute, S. Delta 8, 14561 Athens, Greece
Department of Crop Science, Agricultural University of Athens, IeraOdos75, 11855 Athens, Greece
Author to whom correspondence should be addressed.
Received: 15 November 2017 / Revised: 16 January 2018 / Accepted: 17 January 2018 / Published: 22 January 2018
(This article belongs to the Special Issue Weed Management)
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Glyphosate is the most important herbicide globally, and horseweed (Conyza canadensis) has been one of the most commonly encountered weed species that has developed resistance to it in various parts of the world, including Greece. After glyphosate application, horseweed populations show a wide range of phenotypic plasticity in response to selection pressure. In previous work, we have proposed a herbicide resistance mechanism that is not due to a point mutation at the codon 106 of EPSP synthase but most likely due to a synchronized overexpression of EPSPS and the ABC transporter genes. In the current study, it is hypothesized that the observed phenotypic alterations and differential expression of the EPSPS gene could be attributed to epigenetic changes. DNA methylation plays a pivotal role in many biological procedures such as gene expression, differentiation, and cellular proliferation. Sodium bisulfite sequencing was used to detect epigenetic changes that occur at the C5 position of cytosine residues within CpGdi nucleotides in two horseweed populations (resistant vs. susceptible). Results show differential methylation pattern between the two populations. This work will elucidate the naturally increased resistance of C. Canadensis to glyphosate and set the bases for future development of techniques that restrict weed resistance to herbicides. View Full-Text
Keywords: glyphosate resistance; Conyza canadensis; EPSPS; epigenetics glyphosate resistance; Conyza canadensis; EPSPS; epigenetics

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Margaritopoulou, T.; Tani, E.; Chachalis, D.; Travlos, I. Involvement of Epigenetic Mechanisms in Herbicide Resistance: The Case of Conyza canadensis. Agriculture 2018, 8, 17.

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