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

• Main Author: Da Costa F.R.*
• Publication Date: 2018
• Other Authors: Stinghen J.C.*, Bortoli J.R.G., Coelho C.M.M.*, De Carvalho L.B.*
• Format: Article
• Language: eng
• Source: Repositório Institucional da Udesc
• dARK ID: ark:/33523/001300000sm2f
• Download full: https://repositorio.udesc.br/handle/UDESC/6626

© 2018 Universidade Federal de Santa Catarina. All rights reserved.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.