文献类型：期刊文献

英文题名：Under simulated microgravity and gravity, anthocyanin is regulated by DcaWRKY2 in Dendrobium catenatum leaves

作者：Hou, Tianze[1] Zheng, Baoqiang[1] Peng, Fucheng[1] Jiang, Zehui[2] Zhang, Wenbo[2] Wang, Yan[1]

第一作者：Hou, Tianze

通信作者：Wang, Y[1];Zhang, WB[2]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm, Beijing, Peoples R China;[2]Beijing Bamboo & Rattan Sci & Technol, Int Ctr Bamboo & Rattan, Key Lab, Natl Forestry & Grassland Adm, Beijing, Peoples R China

年份：2025

卷号：15

外文期刊名：FRONTIERS IN PLANT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001411075700001)】；

基金：The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This work was supported by the National Key R&D Program of China (grant number 2021YFD2200505).

语种：英文

外文关键词：anthocyanin; Dendrobium catenatum; DcaWRKY2; simulated microgravity; transcriptional regulation; leaves' color

摘要：Long-term space missions will require high-quality plants that are edible, medicinal, and ornamental, to support the physical and mental health of astronauts under altered gravity conditions. Anthocyanins play a key role in enhancing the medicinal and edible value and ornamental properties of plants. However, under simulated microgravity, the transcription control of anthocyanin biosynthesis is not clear. Here, in order to investigate the influences of simulated microgravity on the anthocyanin accumulation further, clones of Dendrobium catenatum were exposed for 20 days to simulated microgravity conditions. The anthocyanin content in Dendrobium catenatum leaves increased in the simulated microgravity conditions compared with that in gravity-treated clones. Furthermore, based on the transcriptome sequencing, differentially expressed genes (DEGs), and weighted gene co-expression network analysis combined with RT-qPCR, we identified one WRKY gene, DcaWRKY2, from a Dendrobium catenatum under simulated microgravity conditions, which indicated that DcaWRKY2 may be involved in anthocyanin biosynthesis under simulated microgravity conditions. A more in-depth analysis evaluating the function of DcaWRKY2, transcription factor gene DcaWRKY2, was silenced by virus-induced gene silencing under gravity conditions, which resulted in the increase of anthocyanin accumulation in leaves, and the expression levels of anthocyanin biosynthesis pathway (ABP) structural genes, including DcaCHS, DcaCHI, DcaF3H, DcaDFR, and DcaANS were increased significantly. This research provides new insights into how altered gravity can affect anthocyanin synthesis in plants and illuminated the regulatory effects of DcaWRKY2 on the leaves' pigmentation and anthocyanin biosynthesis in Dendrobium catenatum under gravity and simulated microgravity.