Arabidopsis alkaline ceramidase ACER functions in defense against insect herbivory
| العنوان: | Arabidopsis alkaline ceramidase ACER functions in defense against insect herbivory |
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| المؤلفون: | Li-Qun Huang, Ping-Ping Li, Jian Yin, Yong-Kang Li, Ding-Kang Chen, He-Nan Bao, Rui-Yuan Fan, Hao-Zhuo Liu, Nan Yao |
| المصدر: | Journal of Experimental Botany. 73:4954-4967 |
| بيانات النشر: | Oxford University Press (OUP), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Sphingolipids, Insecta, Arabidopsis Proteins, Physiology, fungi, Arabidopsis, Acer, Cyclopentanes, Plant Science, Ceramides, Gene Expression Regulation, Plant, Alkaline Ceramidase, Animals, Herbivory, Oxylipins |
| الوصف: | Plant sphingolipids are important membrane components and bioactive molecules in development and defense responses. However, the function of sphingolipids in plant defense, especially against herbivores, is not fully understood. Here, we report that Spodoptera exigua feeding affects sphingolipid metabolism in Arabidopsis, resulting in increased levels of sphingoid long-chain bases, ceramides, and hydroxyceramides. Insect-induced ceramide and hydroxyceramide accumulation is dependent on the jasmonate signaling pathway. Loss of the Arabidopsis alkaline ceramidase ACER increases ceramides and decreases long-chain base levels in plants; in this work, we found that loss of ACER enhances plant resistance to S. exigua and improves response to mechanical wounding. Moreover, acer-1 mutants exhibited more severe root-growth inhibition and higher anthocyanin accumulation than wild-type plants in response to methyl jasmonate treatment, indicating that loss of ACER increases sensitivity to jasmonate and that ACER functions in jasmonate-mediated root growth and secondary metabolism. Transcript levels of ACER were also negatively regulated by jasmonates, and this process involves the transcription factor MYC2. Thus, our findings reveal that ACER is involved in mediating jasmonate-related plant growth and defense and that jasmonates function in regulating the expression of ACER. |
| تدمد: | 1460-2431 0022-0957 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7e9034cbda6a243d113d4857a608c108 https://doi.org/10.1093/jxb/erac166 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi.dedup.....7e9034cbda6a243d113d4857a608c108 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14602431 00220957 |
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