Mode of Action of a Novel Synthetic Auxin Herbicide Halauxifen-Methyl

Halauxifen-methyl is a new auxin herbicide developed by Corteva Agriscience (Wilmington, DE, USA). It has been suggested that ABF5 may be the target of halauxifen-methyl, as AFB5 mutants Arabidopsis thaliana are resistant to which preferentially binds AFB5. However, mode action halauxifen-methyl not yet reported. Therefore, aim present study was reveal exploring its influence on indole-3-acetic acid (IAA) homeostasis and biosynthesis ethylene Abscisic Acid (ABA) in Galium aparine. The results showed could disrupt IAA stimulate overproduction ABA inducing overexpression 1-aminocyclopropane-1-carboxylate synthase (ACS) 9-cis-epoxycarotenoid dioxygenase (NCED) genes involved biosynthesis, finally leading senescence plant death.