Conyza canadensis is a noxious weed that has evolved resistance to many different herbicide modes of action. In southern Spain, some biotypes have been reported to be glyphosate resistant. With the aim of elucidating the EPSPS expression level in a glyphosate-resistant biotype, molecular studies were carried out. We found that the mRNA expression level in the resistant biotype is influenced by the stress caused by herbicide application.  Thus, the expression levels were significantly different and almost two times greater in the resistant biotype compared the susceptible one. This study shows that a differential mRNA expression level is involved in glyphosate resistance of the resistant C. canadensis biotype.

EPSPS expression levels in the glyphosate resistant <i>Conyza canadensis</i> from Spain

248th National Meeting (2014)

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EPSPS expression levels in the glyphosate resistant Conyza canadensis from Spain