Role of melatonin in UV‐B signaling pathway and UV‐B stress resistance in Arabidopsis thaliana
| Autor: | Meng-Qi Lei, Xuan Huang, Jing-Wen Yao, Zheng Ma, Yan-Qin Ma, Cheng-Ying Hao, Ying Zhu, Li Yu Chen, Zi-Qin Xu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
0301 basic medicine Ultraviolet Rays Physiology Arabidopsis Plant Science 01 natural sciences Melatonin 03 medical and health sciences Stress Physiological Malondialdehyde medicine Arabidopsis thaliana Transcription factor biology Chemistry Effector Abiotic stress fungi Hydrogen Peroxide Plants Genetically Modified biology.organism_classification Hedgehog signaling pathway Cell biology 030104 developmental biology Signal transduction Reactive Oxygen Species Signal Transduction 010606 plant biology & botany medicine.drug |
| Zdroj: | Plant, Cell & Environment. 44:114-129 |
| ISSN: | 1365-3040 0140-7791 |
| DOI: | 10.1111/pce.13879 |
| Popis: | Melatonin (N-acetyl-5-methoxytryptamine) plays important roles in plant defences against a variety of biotic and abiotic stresses, including UV-B stress. Molecular mechanisms underlying functions of melatonin in plant UV-B responses are poorly understood. Here, we show that melatonin effect on molecular signalling pathways, physiological changes and UV-B stress resistance in Arabidopsis. Both exogenous and endogenous melatonin affected expression of UV-B signal transduction pathway genes. Experiments using UV-B signalling component mutants cop1-4 and hy5-215 revealed that melatonin not only acts as an antioxidant to promote UV-B stress resistance, but also regulates expression of several key components of UV-B signalling pathway, including ubiquitin-degrading enzyme (COP1), transcription factors (HY5, HYH) and RUP1/2. Our findings indicate that melatonin delays and subsequently enhances expression of COP1, HY5, HYH and RUP1/2, which act as central effectors in UV-B signalling pathway, thus regulating their effects on antioxidant systems to protect the plant from UV-B stress. |
| Databáze: | OpenAIRE |
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