Mechanisms of resistance to glyphosate in a ryegrass (lolium multiflorum) biotype from chile

WEED SCIENCE;
Weed Sci.

dc.creatorDe Prado-Amian, Rafael
dc.creatorEspinoza-Neira, Nelson Camilo
dc.creatorRuiz-Santaella-Moreno, Juan Pedro
dc.creatorGaurit, Cristian
dc.date2017-04-27T18:49:35Z
dc.date2022-07-07T01:39:59Z
dc.date2017-04-27T18:49:35Z
dc.date2022-07-07T01:39:59Z
dc.date2007
dc.date.accessioned2023-08-22T09:01:47Z
dc.date.available2023-08-22T09:01:47Z
dc.identifier0
dc.identifierD04I1022
dc.identifierD04I1022
dc.identifierWOS:000249169700006
dc.identifier0043-1745
dc.identifierhttps://hdl.handle.net/10533/196891
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8335105
dc.descriptionGlyphosate behavior was examined in Italian ryegrass plants from Chile that were sensitive (S) and resistant (R) to this herbicide. In order to explain the resistance to glyphosate, contact angles, spray retention, foliar uptake, herbicide translocation, and target enzyme activity were studied. Contact angles of glyphosate solutions at a field concentration were 40 degrees to 45 degrees on the abaxial surface of R leaves as compared to 70 degrees on S. Glyphosate spray retention by R plants was 35% lower than by S plants. Glyphosate uptake by the abaxial leaf surface of R plants was about 40% lower than that of S plants. In addition, in the R plants more glyphosate migrated to the tip of the treated leaves. The target enzyme in R and S plants was sensitive to the herbicide. Based on these and previous results, it is concluded that resistance in this Italian ryegrass biotype results from lower spray retention, lower foliar uptake from the abaxial leaf surface, and altered translocation pattern. The decreases in spray retention and foliar uptake constitute new mechanisms of glyphosate resistance.
dc.description0
dc.description44
dc.descriptionFONDEF
dc.descriptionpmenduca@yahoo.com
dc.description0
dc.descriptionFONDEF
dc.languageENG
dc.publisherWEED SCI SOC AMER
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinstname: Conicyt
dc.relationreponame: Repositorio Digital RI2.0
dc.relationinfo:eu-repo/grantAgreement/Fondef/D04I1022
dc.relationinfo:eu-repo/semantics/dataset/hdl.handle.net/10533/93477
dc.relationhttps://doi.org/10.1614/WS-06-167.1
dc.rightsinfo:eu-repo/semantics/openAccess
dc.titleMechanisms of resistance to glyphosate in a ryegrass (lolium multiflorum) biotype from chile
dc.titleWEED SCIENCE
dc.titleWeed Sci.
dc.typeArticulo
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.coverageLAWRENCE


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