欧亚国际

来自比利时间的科学家发表了题为Metabolomics Reveal Induction of ROS Production and Glycosylation Events in Wheat Upon Exposure to the Green Leaf Volatile Z-3-Hexenyl Acetate的文章，文章将代谢研究与表型研究相结合。文章使用了定制的自动化多光谱成像系统Pathoviewer。该系统配有多光谱相机模块，用于小麦苗中自动测量Z-3-HAC的影响。依据制造商的说明对彩图以及 PSII (Fv/Fm)最大效率进行测量。要检测H2O2 累积。

Metabolomics Reveal Induction of ROS Production and Glycosylation Events in Wheat Upon Exposure to the Green Leaf Volatile Z-3-Hexenyl Acetate

Maarten Ameye1,2*, Lieven Van Meulebroek3, Bianca Meuninck1, Lynn Vanhaecke3, Guy Smagghe2, Geert Haesaert1 and Kris Audenaert1*

1Laboratory of Applied Mycology and Phenomics, Department of Plants and Crops, Faculty of Biosescience Engineering, Ghent University, Ghent, Belgium

2Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Biosescience Engineering, Ghent University, Ghent, Belgium

3Laboratory of Chemical Analysis, Department of Veterinary Public Health and Food Safety, Faculty of Veterinary Medicine, Merelbeke, Belgium

The activation and priming of plant defense upon perception of green leaf volatiles (GLVs) have often been reported. However, information as to which metabolic pathways in plants are affected by GLVs remains elusive. We report the production of reactive oxygen species in the tip of young wheat leaves followed by activation of antioxidant-related enzyme activity. In this study, we aimed to uncover metabolic signatures upon exposure to the GLV Z-3-hexenyl acetate (Z-3-HAC). By using an untargeted metabolomics approach, we observed changes in the phenylpropanoid pathways which yield metabolites that are involved in many anti-oxidative processes. Furthermore, exposure to GLV, followed by infection with Fusarium graminearum (Fg), induced significantly greater changes in the phenylpropanoid pathway compared to a sole Z-3-HAC treatment. Fragmentation of a selection of metabolites, which are significantly more upregulated in the Z-3-HAC + Fg treatment, showed D-glucose to be present as a substructure. This suggests that Z-3-HAC induces early glycosylation processes in plants. Additionally, we identified the presence of hexenyl diglycosides, which indicates that aerial Z-3-HAC is metabolized in the leaves by glycosyltransferases. Together these data indicate that GLV Z-3-HAC is taken up by leaves and incites oxidative stress. This subsequently results in the modulation of the phenylpropanoid pathway and an induction of glycosylation processes.