Can seed quality of hairy fleabane be reduced due to glyphosate resistance?

• Autor(a) principal: Da Costa, Flávia Regina
• Data de Publicação: 2018
• Outros Autores: Stinghen, Jussara Cristina, Bortoli, Janice Regina Gmach, Coelho, Cileide Maria Medeiros, De Carvalho, Leonardo Bianco [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.5965/223811711712018136; http://hdl.handle.net/11449/221077
• topic: Conyza bonariensis; Herbicide resistance; Seed vigor

The resistance to glyphosate may provide a penalty on plant growth and physiology. We investigate if the resistance to glyphosate reduces the seed quality of Conyza bonariensis by performing seed viability and vigor tests under a completely randomized design with four replicates of 50 seeds for both glyphosate-susceptible (S) and -resistant (R) biotypes. Low seed viability (<50%) was found in both S and R biotypes. No difference occurred between either S and R biotypes on seed germination and embryo viability. The percentage of seed germination of the S biotype was higher than the R biotype in the cold test (~58%), accelerated aging test (~84%), and high-temperature stress test (~45%). This is the first time one found evidences that resistance to glyphosate may be responsible for a penalty on seed quality of C. bonariensis.