Coronatine Modulated the Generation of Reactive Oxygen Species for Regulating the Water Loss Rate in the Detaching Maize Seedlings

Coronatine (COR), a structural and functional mimic of jasmonates, is involved in wide array effects on plant development defense response. The present study aims to investigate the role COR, counteracting drought stress by modulating reactive oxygen species (ROS) homeostasis, water balance, antioxidant regulation detached maize plants. Our results showed that COR can markedly decrease loss rate, but antioxidants diphenyleneiodonium chloride (DPI) dimethylthiourea (DMTU) eliminate effect induced COR. Using dye 2′,7′-dichlorofluorescein diacetate (H2DCF-DA) loaded epidermis guard cells, it observed could increase ROS production, then DPI DMTU decreased production In addition, expression ZmRBOHs genes, which were associated with generation was increased levels ZmRBOHC highly expressed cells. Moreover, COR-treated plants H2O2 O2−· accumulation, enzyme activities control plants, while relieved accumulation under PEG treatment. These indicated improve performance homeostasis maintain rate activities.