Identification of a target‐site mutation conferring resistance to triazine herbicides in oriental mustard (Sisymbrium orientale L.) from Australia

In southern Australia, oriental mustard (Sisymbrium orientale) has been controlled successfully by triazine herbicides for several decades. The screening of 40 populations that were collected from the southern grain belt of Australia during 2010 and 2013 for resistance to six different herbicides (g...

Full description

Saved in:
Bibliographic Details
Published in:Weed biology and management 2017-12, Vol.17 (4), p.153-160
Main Authors: Dang, Hue T., Malone, Jenna M., Boutsalis, Peter, Gill, Gurjeet, Preston, Christopher
Format: Article
Language:English
Subjects:
Atrazine
Chlorsulfuron
Dichlorophenoxyacetic acid
Diuron
Gene sequencing
Glycine
Glyphosate
Grain
Herbicide resistance
Herbicides
Missense mutation
Mustard
Mutation
oriental mustard
Populations
psbA
PsbA gene
Serine
Sisymbrium orientale
Target recognition
target‐site mutation
Triazine
triazines
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In southern Australia, oriental mustard (Sisymbrium orientale) has been controlled successfully by triazine herbicides for several decades. The screening of 40 populations that were collected from the southern grain belt of Australia during 2010 and 2013 for resistance to six different herbicides (glyphosate, diflufenican, imazamox, chlorsulfuron, atrazine and 2,4‐dichlorophenoxyacetic acid) identified two oriental mustard populations as highly resistant to atrazine. Compared to the known oriental mustard‐susceptible populations (S1 and S2), these two resistant populations (P17 and P18) from near Horsham, Victoria, Australia, were 311‐ and 315‐fold resistant to atrazine, as determined by a comparison of the LD50 values. However, there was no resistance to diuron detected in these populations. Sequencing of the chloroplast psbA gene identified a missense mutation of serine 264 to glycine in both herbicide‐resistant oriental mustard populations, which is known to confer high‐level atrazine resistance in other species.
ISSN:1444-6162
1445-6664
DOI:10.1111/wbm.12133