Omethoate treatment mitigates high salt stress inhibited maize seed germination

Kejun Yang; Yifei Zhang; Lianhua Zhu; Zuotong Li; Benliang Deng

doi:10.1016/j.pestbp.2017.12.001

Omethoate treatment mitigates high salt stress inhibited maize seed germination

Pestic Biochem Physiol. 2018 Jan:144:79-82. doi: 10.1016/j.pestbp.2017.12.001. Epub 2017 Dec 6.

Authors

Kejun Yang¹, Yifei Zhang², Lianhua Zhu³, Zuotong Li⁴, Benliang Deng⁵

Affiliations

¹ Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Department of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China; Daqing Key Laboratory of Saline-alkaline Land Utilization and Improvement, China.
² Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Department of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
³ Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Department of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China; Plant Protection Faculty (Grade 2015), Department of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
⁴ Daqing Key Laboratory of Straw Reclamation Technology Research and Development, China.
⁵ Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Department of Agronomy, Heilongjiang Bayi Agricultural University, Daqing 163319, China. Electronic address: benliangdeng@163.com.

PMID: 29463412
DOI: 10.1016/j.pestbp.2017.12.001

Abstract

Omethoate (OM) is a highly toxic organophophate insecticide, which is resistant to biodegradation in the environment and is widely used for pest control in agriculture. The effect of OM on maize seed germination was evaluated under salt stress. Salt (800mM) greatly reduced germination of maize seed and this could be reversed by OM. Additionally, H₂O₂ treatment further improved the effect of OM on seed germination. Higher H₂O₂ content was measured in OM treated seed compared to those with salt stress alone. Dimethylthiourea (DTMU), a specific scavenger of reactive oxygen species (ROS), inhibited the effect of OM on seed germination, as did IMZ (imidazole), an inhibitor of NADPH oxidase. Abscisic acid (ABA) inhibited the effect of OM on seed germination, whereas fluridone, a specific inhibitor of ABA biosynthesis, enhanced the effect of OM. Taken together, these findings suggest a role of ROS and ABA in the promotion of maize seed germination by OM under salt stress.

Keywords: Abiotic stress; Dormancy release; Maize seed; NADPH oxidase; Pesticide.

MeSH terms

Abscisic Acid / antagonists & inhibitors
Abscisic Acid / metabolism
Dimethoate / analogs & derivatives*
Dimethoate / pharmacology
Germination / drug effects*
Hydrogen Peroxide / metabolism
Insecticides / pharmacology*
Oxidative Stress / drug effects*
Pyridones / pharmacology
Reactive Oxygen Species / metabolism
Seeds / growth & development*
Sodium Chloride / pharmacology*
Zea mays / embryology*

Substances

Insecticides
Pyridones
Reactive Oxygen Species
dimethoxon
fluridone
Sodium Chloride
Abscisic Acid
Hydrogen Peroxide
Dimethoate