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Choun-Sea Lin, Jeremy JW Chen, Chi-Chou Chiu, Han C.W. Hsiao, Chen-Jui Yang, Xiao-Hua Jin, James Leebens-Mack, Claude W. dePamphilis ,Yao-Ting Huang, Ling-Hung Yang, Wan-Jung Chang, Ling Kui, Gane Ka-Shu Wong, Jer-Ming Hu, Wen Wang, Ming-Che Shih (2017) Concomitant loss of NDH complex-related genes within chloroplast and nuclear genomes in some orchids. The Plant Journal. DOI: 10.1111/tpj.13525
Chloroplast NAD(P)H dehydrogenase-like (NDH) complex consists of ~30 subunits from both the nuclear and chloroplast genomes and is ubiquitous across most land plants. In some orchids, such as Phalaenopsis equestris, Dendrobium officinale and D. catenatum, most of the 11 chloroplast genome encoded ndh genes (cp-ndh) have been lost. Here we investigated whether functional cp-ndh genes have been completely lost in these orchids or whether they have been transferred and retained in the nuclear genomes. Further, we assessed whether both cp-ndh genes and nucleus-encoded NDH-related genes can be lost resulting in the absence of the NDH complex. Comparative analyses of the genome of Apostasia odorata, an orchid species with a complete complement of cp-ndh genes which represents the sister lineage to all other orchids, and three published orchid genome sequences for Phalaenopsis equestris, D. officinale and D. catenatum which are all missing cp-ndh genes, indicated that copies of cp-ndh genes are not present in any of these four nuclear genomes. This observation suggests that the NDH complex is not necessary for some plants. Comparative genomic/transcriptomic analyses of currently available plastid genome sequences and nuclear transcriptome data showed that 47 out of 660 photoautotrophic plants and all the heterotrophic plants are missing plastid encoded cp-ndh genes and exhibit no evidence for maintenance of a functional NDH complex. Our data indicate that the NDH complex can be lost in photoautotrophic plant species. Further, the loss of the NDH complex may increase the probability of transition from a photoautotrophic to a heterotrophic life history. link

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*2017/07/10 10:30 AM
Dr. Wen-Chin Yang (Associate Research Fellow, Agricultural Biotechnology Research Center, Academia Sinica)
Coming Back to Nature:
1. Research and Development of Phytogenics for Animal Health
2. Target Identification and Mechanistic Study of Phytochemicals for Human Health

Auditorium A134, Agricultural Technology Building, Agricultural Biotechnology Research Center

*2017/07/12 3:30 PM
Dr. Masayoshi Nakamura (Designated Lecturer, Frommer Group, Institute of Transformative Bio-Molecules (ITbM), Nagoya University, Japan)
Mechanisms for Reorientation of Cortical Microtubule Arrays in Response to Blue Light
Auditorium A134, Agricultural Technology Building, Agricultural Biotechnology Research Center

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Kyoko Nakagawa-Goto*, Jo-Yu Chen, Yu-Ting Cheng, Wai-Leng Lee, Munehisa Takeya, Yohei Saito, Kuo-Hsiung Lee*, and Lie-Fen Shyur* (2016) Novel sesquiterpene lactone analogues as potent anti-breast cancer agents. Molecular Oncology, 2016, 10(6):921-937

H.-F. Chang, S.-L. Wang and K.-C. Yeh* (2017) Effect of gallium exposure in Arabidopsis thaliana is similar to aluminum stress. Environmental Science & Technology: Accepted DOI: 10.1021/acs.est.6b05760

Jia-Hua Feng, Kyoko Nakagawa-Goto, Kuo-Hsiung Lee, and Lie-Fen Shyur* (2016) A novel plant sesquiterpene lactone derivative DETD-35 suppresses BRAFV600E mutant melanoma growth and overcomes acquired vemurafenib resistance in mice. Molecular Cancer Therapeutics, 15(6):1163-1176

Ya-Ting Chao, Shao-Hua Yen, Jen-Hau Yeh, Wan-Chieh Chen, Ming-Che Shih*(2017) Orchidstra 2.0—A Transcriptomics Resource for the Orchid Family Plant & Cell Physiol DOI:10.1093/pcp/pcw220

Maria Karmella Apaya, Meng-Ting Chang, and Lie-Fen Shyur* (2016) Phytomedicine polypharmacology: Cancer therapy through modulating the tumor microenvironment and oxylipin dynamics.Pharmacology & Therapeutics 162:58-68

Triple-negative breast cancer (TNBC) is associated with high grade, metastatic phenotype, younger patient age, and poor prognosis. The discovery of an effective anti-TNBC agent has been a challenge in oncology. In this study, fifty-eight ester derivatives (DETDs) with a novel sesquiterpene dilactone skeleton were organically synthesized from a bioactive natural product deoxyelephantopin (DET). Among them, DETD-35 showed potent antiproliferative activities against a panel of breast cancer cell lines including TNBC cell line MDA-MB-231, without inhibiting normal mammary cells M10. DETD-35 exhibited a better effect than parental DET on inhibiting migration, invasion, and motility of MDA-MB-231 cells in a concentration-dependent manner. ...more
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