@article{ZhouZhangGuietal.2015, author = {Zhou, Ying and Zhang, Ling and Gui, Jiadong and Dong, Fang and Cheng, Sihua and Mei, Xin and Zhang, Linyun and Li, Yongqing and Su, Xinguo and Baldermann, Susanne and Watanabe, Naoharu and Yang, Ziyin}, title = {Molecular Cloning and Characterization of a Short-Chain Dehydrogenase Showing Activity with Volatile Compounds Isolated from Camellia sinensis}, series = {Plant molecular biology reporter}, volume = {33}, journal = {Plant molecular biology reporter}, number = {2}, publisher = {Springer}, address = {New York}, issn = {0735-9640}, doi = {10.1007/s11105-014-0751-z}, pages = {253 -- 263}, year = {2015}, abstract = {Camellia sinensis synthesizes and emits a large variety of volatile phenylpropanoids and benzenoids (VPB). To investigate the enzymes involved in the formation of these VPB compounds, a new C. sinensis short-chain dehydrogenase/reductase (CsSDR) was isolated, cloned, sequenced, and functionally characterized. The complete open reading frame of CsSDR contains 996 nucleotides with a calculated protein molecular mass of 34.5 kDa. The CsSDR recombinant protein produced in Escherichia coli exhibited dehydrogenase-reductase activity towards several major VPB compounds in C. sinensis flowers with a strong preference for NADP/NADPH co-factors, and showed affinity for (R)/(S)-1-phenylethanol (1PE), phenylacetaldehyde, benzaldehyde, and benzyl alcohol, and no affinity for acetophenone (AP) and 2-phenylethanol. CsSDR showed the highest catalytic efficiency towards (R)/(S)-1PE. Furthermore, the transient expression analysis in Nicotiana benthamiana plants validated that CsSDR could convert 1PE to AP in plants. CsSDR transcript level was not significantly affected by floral development and some jasmonic acid-related environmental stress, and CsSDR transcript accumulation was detected in most floral tissues such as receptacle and anther, which were main storage locations of VPB compounds. Our results indicate that CsSDR is expressed in C. sinensis flowers and is likely to contribute to a number of floral VPB compounds including the 1PE derivative AP.}, language = {en} } @article{JiaAnslanChenetal.2022, author = {Jia, Weihan and Anslan, Sten and Chen, Fahu and Cao, Xianyong and Dong, Hailiang and Dulias, Katharina and Gu, Zhengquan and Heinecke, Liv and Jiang, Hongchen and Kruse, Stefan and Kang, Wengang and Li, Kai and Liu, Sisi and Liu, Xingqi and Liu, Ying and Ni, Jian and Schwalb, Antje and Stoof-Leichsenring, Kathleen R. and Shen, Wei and Tian, Fang and Wang, Jing and Wang, Yongbo and Wang, Yucheng and Xu, Hai and Yang, Xiaoyan and Zhang, Dongju and Herzschuh, Ulrike}, title = {Sedimentary ancient DNA reveals past ecosystem and biodiversity changes on the Tibetan Plateau: overview and prospects}, series = {Quaternary science reviews : the international multidisciplinary research and review journal}, volume = {293}, journal = {Quaternary science reviews : the international multidisciplinary research and review journal}, publisher = {Elsevier}, address = {Oxford}, issn = {0277-3791}, doi = {10.1016/j.quascirev.2022.107703}, pages = {14}, year = {2022}, abstract = {Alpine ecosystems on the Tibetan Plateau are being threatened by ongoing climate warming and intensified human activities. Ecological time-series obtained from sedimentary ancient DNA (sedaDNA) are essential for understanding past ecosystem and biodiversity dynamics on the Tibetan Plateau and their responses to climate change at a high taxonomic resolution. Hitherto only few but promising studies have been published on this topic. The potential and limitations of using sedaDNA on the Tibetan Plateau are not fully understood. Here, we (i) provide updated knowledge of and a brief introduction to the suitable archives, region-specific taphonomy, state-of-the-art methodologies, and research questions of sedaDNA on the Tibetan Plateau; (ii) review published and ongoing sedaDNA studies from the Tibetan Plateau; and (iii) give some recommendations for future sedaDNA study designs. Based on the current knowledge of taphonomy, we infer that deep glacial lakes with freshwater and high clay sediment input, such as those from the southern and southeastern Tibetan Plateau, may have a high potential for sedaDNA studies. Metabarcoding (for microorganisms and plants), metagenomics (for ecosystems), and hybridization capture (for prehistoric humans) are three primary sedaDNA approaches which have been successfully applied on the Tibetan Plateau, but their power is still limited by several technical issues, such as PCR bias and incompleteness of taxonomic reference databases. Setting up high-quality and open-access regional taxonomic reference databases for the Tibetan Plateau should be given priority in the future. To conclude, the archival, taphonomic, and methodological conditions of the Tibetan Plateau are favorable for performing sedaDNA studies. More research should be encouraged to address questions about long-term ecological dynamics at ecosystem scale and to bring the paleoecology of the Tibetan Plateau into a new era.}, language = {en} }