Exogenous sodium diethyldithiocarbamate, a Jasmonic acid biosynthesis inhibitor, induced resistance to powdery mildew in wheat
Yinghui Li,
Lina Qiu,
Qiang Zhang,
Xiangxi Zhuansun,
Huifang Li,
Xin Chen,
Tamar Krugman,
Qixin Sun,
Chaojie Xie
Affiliations
Yinghui Li
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Lina Qiu
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Qiang Zhang
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Xiangxi Zhuansun
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Huifang Li
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Xin Chen
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Tamar Krugman
Institute of Evolution University of Haifa, Mt. Carmel Haifa Israel
Qixin Sun
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Chaojie Xie
Key Laboratory of Crop Heterosis and Utilization (MOE) and State Key Laboratory for Agrobiotechnology Beijing Key Laboratory of Crop Genetic Improvement China Agricultural University Beijing China
Abstract Jasmonic acid (JA) is an important plant hormone associated with plant–pathogen defense. To study the role of JA in plant–fungal interactions, we applied a JA biosynthesis inhibitor, sodium diethyldithiocarbamate (DIECA), on wheat leaves. Our results showed that application of 10 mM DIECA 0–2 days before inoculation effectively induced resistance to powdery mildew (Bgt) in wheat. Transcriptome analysis identified 364 up‐regulated and 68 down‐regulated differentially expressed genes (DEGs) in DIECA‐treated leaves compared with water‐treated leaves. Gene ontology (GO) enrichment analysis of the DEGs revealed important GO terms and pathways, in particular, response to growth hormones, activity of glutathione metabolism (e.g., glutathione transferase activity), oxalate oxidase, and chitinase activity. Gene annotaion revealed that some pathogenesis‐related (PR) genes, such as PR1.1, PR1, PR10, PR4a, Chitinase 8, beta‐1,3‐glucanase, RPM1, RGA2, and HSP70, were induced by DIECA treatment. DIECA reduced JA and auxin (IAA) levels, while increased brassinosteroid, glutathione, and ROS lesions in wheat leaves, which corroborated with the transcriptional changes. Our results suggest that DIECA can be applied to increase plant immunity and reduce the severity of Bgt disease in wheat fields.
