Resistance mechanisms to dinitroaniline herbicides in annual ryegrass (Lolium rigidum Gaudin)

Jinyi Chen

Research output: ThesisDoctoral Thesis

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Abstract

Dinitroanilines (trifluralin, pendimethalin etc.) have been used as pre-emergence herbicides for ryegrass control for decades. With the dinitroaniline resistance evolution escalating, revealing dinitroaniline resistance mechanisms is of high importance. By investigating four trifluralin-resistant annual ryegrass populations, target-site a-tubulin mutations (including known Val-202-Phe, Thr-239-lle mutations and novel Arg-243-Lys/Met mutations), and non-target-site enhanced trifluralin metabolism were identified to confer dinitroaniline resistance. Additionally, the target-site resistance was mainly inherited as a nuclear-controlled recessive trait. And the Arg-243-Met mutation was found to incur profound changes in plant morphology. This knowledge is helpful for developing better weed management strategies to mitigate dinitroaniline resistance.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Award date23 Jun 2019
DOIs
Publication statusUnpublished - 2019

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dinitroaniline herbicides
Lolium rigidum
resistance mechanisms
Lolium
trifluralin
mutation
pendimethalin
plant morphology
tubulin
weed control
herbicides
metabolism

Cite this

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title = "Resistance mechanisms to dinitroaniline herbicides in annual ryegrass (Lolium rigidum Gaudin)",
abstract = "Dinitroanilines (trifluralin, pendimethalin etc.) have been used as pre-emergence herbicides for ryegrass control for decades. With the dinitroaniline resistance evolution escalating, revealing dinitroaniline resistance mechanisms is of high importance. By investigating four trifluralin-resistant annual ryegrass populations, target-site a-tubulin mutations (including known Val-202-Phe, Thr-239-lle mutations and novel Arg-243-Lys/Met mutations), and non-target-site enhanced trifluralin metabolism were identified to confer dinitroaniline resistance. Additionally, the target-site resistance was mainly inherited as a nuclear-controlled recessive trait. And the Arg-243-Met mutation was found to incur profound changes in plant morphology. This knowledge is helpful for developing better weed management strategies to mitigate dinitroaniline resistance.",
keywords = "herbicide resistance, mechanism, microtubule, metabolic resistance, tubulin mutation, trifluralin",
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doi = "10.26182/5d37a636e0eb0",
language = "English",
school = "The University of Western Australia",

}

Resistance mechanisms to dinitroaniline herbicides in annual ryegrass (Lolium rigidum Gaudin). / Chen, Jinyi.

2019.

Research output: ThesisDoctoral Thesis

TY - THES

T1 - Resistance mechanisms to dinitroaniline herbicides in annual ryegrass (Lolium rigidum Gaudin)

AU - Chen, Jinyi

PY - 2019

Y1 - 2019

N2 - Dinitroanilines (trifluralin, pendimethalin etc.) have been used as pre-emergence herbicides for ryegrass control for decades. With the dinitroaniline resistance evolution escalating, revealing dinitroaniline resistance mechanisms is of high importance. By investigating four trifluralin-resistant annual ryegrass populations, target-site a-tubulin mutations (including known Val-202-Phe, Thr-239-lle mutations and novel Arg-243-Lys/Met mutations), and non-target-site enhanced trifluralin metabolism were identified to confer dinitroaniline resistance. Additionally, the target-site resistance was mainly inherited as a nuclear-controlled recessive trait. And the Arg-243-Met mutation was found to incur profound changes in plant morphology. This knowledge is helpful for developing better weed management strategies to mitigate dinitroaniline resistance.

AB - Dinitroanilines (trifluralin, pendimethalin etc.) have been used as pre-emergence herbicides for ryegrass control for decades. With the dinitroaniline resistance evolution escalating, revealing dinitroaniline resistance mechanisms is of high importance. By investigating four trifluralin-resistant annual ryegrass populations, target-site a-tubulin mutations (including known Val-202-Phe, Thr-239-lle mutations and novel Arg-243-Lys/Met mutations), and non-target-site enhanced trifluralin metabolism were identified to confer dinitroaniline resistance. Additionally, the target-site resistance was mainly inherited as a nuclear-controlled recessive trait. And the Arg-243-Met mutation was found to incur profound changes in plant morphology. This knowledge is helpful for developing better weed management strategies to mitigate dinitroaniline resistance.

KW - herbicide resistance

KW - mechanism

KW - microtubule

KW - metabolic resistance

KW - tubulin mutation

KW - trifluralin

U2 - 10.26182/5d37a636e0eb0

DO - 10.26182/5d37a636e0eb0

M3 - Doctoral Thesis

ER -