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| 1 | Integrated network analyses identify MYB4R1 neofunctionalization in the UV-B adaptation of Tartary buckwheat显示文摘A hallmark of adaptive evolution is innovation in gene function,which is associated with the development of distinct roles for genes during plant evolution;however,assessing functional innovation over long periods of time is not trivial.Tartary buckwheat(Fagopyrum tataricum)originated in the Himalayan region and has been exposed to intense UV-B radiation for a long time,making it an ideal species for studying novel UV-B response mechanisms in plants.Here,we developed a workflow to obtain a co-functional network of UV-B responses using data from more than 10,000 samples in more than 80 projects with multi-species and multiomics data.Dissecting the entire network revealed that flavonoid biosynthesis was most significantly related to the UV-B response.Importantly,we found that the regulatory factor MYB4R1,which resides at the core of the network,has undergone neofunctionalization.In vitro and in vivo experiments demonstrated that MYB4R1 regulates flavonoid and anthocyanin accumulation in response to UV-B in buckwheat by binding to L-box motifs in the FtCHS,FtFLS,and FtUFGT promoters.We used deep learning to develop a visual discrimination model of buckwheat flavonoid content based on natural populations exposed to global UV-B radiation.Our study highlights the critical role of gene neofunctionalization in UV-B adaptation. | Moyang Liu Wenjun Sun Zhaotang Ma Chaocheng Guo Jiahao Chen Qi Wu Xiyin Wang Hui Chen | 2022 | Plant Communications2022，3，6： | 1 |
| 2 | The roles of R2R3-MYBs in regulating complex pigmentation patterns in flowers显示文摘Pigmentation patterns are ubiquitous in nature.Visually striking pigmentation patterns are not only aesthetically appealing,but also crucial to pollinator interaction and plant fitness.The formation of complex floral pigmentation patterns mainly relies on the spatiotemporal expression of R2R3-MYB transcription factors and is often associated with certain floral development programs,such as floral organ identity,symmetry,which likely provide key information to initiate the patterning.For a complex pigmentation pattern to form,at least a pair of activator and inhibitor is required,despite their interaction might vary depending on the system being investigated.The regulation of pigmentation pattern involves multiple molecular mechanisms,such as transcriptional regulation,small RNA,transposon-mediated gene silencing,and methylation of gene body.Identifying these regulators can be facilitated by using single-cell and spatial transcriptomics as well as innovative plant transformation technologies.Moreover,plant organ development and pigmentation patterns are often interdependent,but current methods of describing patterns are static.Therefore,more precise and quantitative measurements are needed to elucidate the developmental mechanisms underlying complex pigmentation patterns in flowers. | Baoqing Ding | 2023 | Horticultural Plant Journal2023，9，6： | 0 |
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