Rapid detoxification via glutathione S-transferase (GST) conjugation confers a high level of atrazine resistance in Palmer amaranth (Amaranthus palmeri)

Pest Management Science
Sridevi NakkaMithila Jugulam

Abstract

Palmer amaranth (Amaranthus palmeri) is an economically troublesome, aggressive and damaging weed that has evolved resistance to six herbicide modes of action including photosystem II (PS II) inhibitors such as atrazine. The objective of this study was to investigate the mechanism and inheritance of atrazine resistance in Palmer amaranth. A population of Palmer amaranth from Kansas (KSR) had a high level (160 - 198-fold more; SE ±21 - 26) of resistance to atrazine compared to the two known susceptible populations MSS and KSS, from Mississippi and Kansas, respectively. Sequence analysis of the chloroplastic psbA gene did not reveal any known mutations conferring resistance to PS II inhibitors, including the most common Ser264Gly substitution for triazine resistance. However, the KSR plants rapidly conjugated atrazine at least 24 times faster than MSS via glutathione S-transferase (GST) activity. Furthermore, genetic analyses of progeny generated from reciprocal crosses of KSR and MSS demonstrate that atrazine resistance in Palmer amaranth is a nuclear trait. Although triazine resistance in Palmer amaranth was reported more than 20 years ago in the USA, this is the first report elucidating the underlying mechanism of resistance t...Continue Reading

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Citations

Aug 1, 2019·International Journal of Phytoremediation·Edson Aparecido Dos SantosErnani Lopes Possato
Oct 19, 2017·The Journal of Heredity·Eric L PattersonTodd A Gaines
Oct 18, 2019·Plants·Mithila Jugulam, Chandrima Shyam
Sep 25, 2019·Plants·Sara L MartinTracey James
Jan 22, 2020·Environmental Science and Pollution Research International·Xiao Dong WangWei Wei Xiao
Mar 2, 2021·Journal of Agricultural and Food Chemistry·Jing Jing Zhang, Hong Yang
May 6, 2021·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Anderson K S MacêdoRalph G Thomé
Jun 24, 2021·Brazilian Journal of Biology = Revista Brasleira De Biologia·Edson Aparecido Dos SantosJosé Barbosa Dos Santos
Oct 27, 2020·Journal of Agricultural and Food Chemistry·Shijun XingZirong Wang

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