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

Jinyi Chen

doi:10.26182/5d37a636e0eb0

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

Jinyi Chen

UWA School of Agriculture and Environment

Research output: Thesis › Doctoral 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 language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Goggin, Danica, Supervisor Yu, Qin, Supervisor Powles, Steve, Supervisor Han, Heping, Supervisor
Award date	23 Jun 2019
DOIs	https://doi.org/10.26182/5d37a636e0eb0
Publication status	Unpublished - 2019

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10.26182/5d37a636e0eb0

THESIS - DOCTOR OF PHILOSOPHY - CHEN Jinyi - 2019
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@phdthesis{81c02ec43dc740e29db2e9dd54882d34,

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",

author = "Jinyi Chen",

year = "2019",

doi = "10.26182/5d37a636e0eb0",

language = "English",

school = "The University of Western Australia",

}

TY - BOOK

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 -

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

Abstract

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