BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i>
UV-B radiation, sensed by the photoreceptor UVR8, induces signal transduction for plant photomorphogenesis. UV-B radiation affects the concentration of the endogenous plant hormone gibberellin (GA), which in turn triggers DELLA protein degradation through the 26S proteasome pathway. DELLA is a negat...
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MDPI AG
2022-07-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/23/13/7386 |
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| author | Yuewei Huang Hui Xiong Yuxin Xie Suihua Lyu Tingting Miao Tingting Li Guizhen Lyu Shaoshan Li |
| author_facet | Yuewei Huang Hui Xiong Yuxin Xie Suihua Lyu Tingting Miao Tingting Li Guizhen Lyu Shaoshan Li |
| author_sort | Yuewei Huang |
| collection | DOAJ |
| description | UV-B radiation, sensed by the photoreceptor UVR8, induces signal transduction for plant photomorphogenesis. UV-B radiation affects the concentration of the endogenous plant hormone gibberellin (GA), which in turn triggers DELLA protein degradation through the 26S proteasome pathway. DELLA is a negative regulator in GA signaling, partially relieving the inhibition of hypocotyl growth induced by UV-B in <i>Arabidopsis</i> <i>thaliana</i>. However, GAs do usually not work independently but integrate in complex networks linking to other plant hormones and responses to external environmental signals. Until now, our understanding of the regulatory network underlying GA-involved UV-B photomorphogenesis had remained elusive. In the present research, we investigate the crosstalk between the GA and UV-B signaling pathways in UV-B-induced photomorphogenesis of <i>Arabidopsis thaliana</i>. Compared with wild type <i>Landsberg erecta</i> (<i>Ler</i>), the abundance of <i>HY5</i>, <i>CHS</i>, <i>FLS,</i> and <i>UF3GT</i> were found to be down-regulated in <i>rga-24</i> and <i>gai-t6</i> mutants under UV-B radiation, indicating that DELLA is a positive regulator in UV-B-induced photomorphogenesis. Our results indicate that BBX24 interacts with RGA (one of the functional DELLA family members). Furthermore, we also found that RGA interacts with HY5 (the master regulator in plant photomorphogenesis). Collectively, our findings suggest that the HY5–BBX24–DELLA module serves as an important signal regulating network, in which GA is involved in UV-B signaling to regulate hypocotyl inhibition. |
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| language | English |
| last_indexed | 2024-03-09T21:48:11Z |
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| series | International Journal of Molecular Sciences |
| spelling | doaj.art-9e39ba58ce7643d78b6c6f392f9b52fe2023-11-23T20:13:02ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672022-07-012313738610.3390/ijms23137386BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i>Yuewei Huang0Hui Xiong1Yuxin Xie2Suihua Lyu3Tingting Miao4Tingting Li5Guizhen Lyu6Shaoshan Li7Key Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, ChinaKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, ChinaKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, ChinaKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, ChinaKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, ChinaGuangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Science, South China Normal University, Guangzhou 510631, ChinaKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, ChinaKey Laboratory of Ecology and Environmental Science in Guangdong Higher Education, School of Life Science, South China Normal University, Guangzhou 510631, ChinaUV-B radiation, sensed by the photoreceptor UVR8, induces signal transduction for plant photomorphogenesis. UV-B radiation affects the concentration of the endogenous plant hormone gibberellin (GA), which in turn triggers DELLA protein degradation through the 26S proteasome pathway. DELLA is a negative regulator in GA signaling, partially relieving the inhibition of hypocotyl growth induced by UV-B in <i>Arabidopsis</i> <i>thaliana</i>. However, GAs do usually not work independently but integrate in complex networks linking to other plant hormones and responses to external environmental signals. Until now, our understanding of the regulatory network underlying GA-involved UV-B photomorphogenesis had remained elusive. In the present research, we investigate the crosstalk between the GA and UV-B signaling pathways in UV-B-induced photomorphogenesis of <i>Arabidopsis thaliana</i>. Compared with wild type <i>Landsberg erecta</i> (<i>Ler</i>), the abundance of <i>HY5</i>, <i>CHS</i>, <i>FLS,</i> and <i>UF3GT</i> were found to be down-regulated in <i>rga-24</i> and <i>gai-t6</i> mutants under UV-B radiation, indicating that DELLA is a positive regulator in UV-B-induced photomorphogenesis. Our results indicate that BBX24 interacts with RGA (one of the functional DELLA family members). Furthermore, we also found that RGA interacts with HY5 (the master regulator in plant photomorphogenesis). Collectively, our findings suggest that the HY5–BBX24–DELLA module serves as an important signal regulating network, in which GA is involved in UV-B signaling to regulate hypocotyl inhibition.https://www.mdpi.com/1422-0067/23/13/7386UV-BDELLAgibberellins (GA)BBX24photomorphogenesis<i>Arabidopsis thaliana</i> |
| spellingShingle | Yuewei Huang Hui Xiong Yuxin Xie Suihua Lyu Tingting Miao Tingting Li Guizhen Lyu Shaoshan Li BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i> International Journal of Molecular Sciences UV-B DELLA gibberellins (GA) BBX24 photomorphogenesis <i>Arabidopsis thaliana</i> |
| title | BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i> |
| title_full | BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i> |
| title_fullStr | BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i> |
| title_full_unstemmed | BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i> |
| title_short | BBX24 Interacts with DELLA to Regulate UV-B-Induced Photomorphogenesis in <i>Arabidopsis thaliana</i> |
| title_sort | bbx24 interacts with della to regulate uv b induced photomorphogenesis in i arabidopsis thaliana i |
| topic | UV-B DELLA gibberellins (GA) BBX24 photomorphogenesis <i>Arabidopsis thaliana</i> |
| url | https://www.mdpi.com/1422-0067/23/13/7386 |
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