NDH expression marks major transitions in plant evolution and reveals coordinate intracellular gene loss

BMC Plant Biology

Research Article

Ming-Tsair Chan¹  Wan-Jung Chang¹  Choun-Sea Lin¹  De-Chih Liao¹  Ming-Che Shih¹  Yao-Ting Huang²  Jin Zhang³  Tracey A Ruhlman³  John C Blazier³  Robert K Jansen⁴  Jeremy JW Chen⁵  Xiaohua Jin⁶ 

[1] Agricultural Biotechnology Research Center of Academia Sinica, Agricultural Technology Building, No. 128, Sec. 2, Academia Road, Nankang, 115, Taipei, Taiwan;Department of Computer Science and Information Engineering, National Chung Cheng University, Chia-Yi, Taiwan;Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA;Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA;Department of Biological Science, Biotechnology Research Group, King Abdulaziz University, 21589, Jeddah, Saudi Arabia;Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan;Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, China;

关键词: Streptophyta;    NAD(P)H dehydrogenase;    Transcriptomics;    Cyclic electron flow;    Sig4;   

DOI  :  10.1186/s12870-015-0484-7

 received in 2014-12-01, accepted in 2015-03-30,  发布年份 2015

来源: Springer

【 摘 要 】

BackgroundKey innovations have facilitated novel niche utilization, such as the movement of the algal predecessors of land plants into terrestrial habitats where drastic fluctuations in light intensity, ultraviolet radiation and water limitation required a number of adaptations. The NDH (NADH dehydrogenase-like) complex of Viridiplantae plastids participates in adapting the photosynthetic response to environmental stress, suggesting its involvement in the transition to terrestrial habitats. Although relatively rare, the loss or pseudogenization of plastid NDH genes is widely distributed across diverse lineages of photoautotrophic seed plants and mutants/transgenics lacking NDH function demonstrate little difference from wild type under non-stressed conditions. This study analyzes large transcriptomic and genomic datasets to evaluate the persistence and loss of NDH expression across plants.ResultsNuclear expression profiles showed accretion of the NDH gene complement at key transitions in land plant evolution, such as the transition to land and at the base of the angiosperm lineage. While detection of transcripts for a selection of non-NDH, photosynthesis related proteins was independent of the state of NDH, coordinate, lineage-specific loss of plastid NDH genes and expression of nuclear-encoded NDH subunits was documented in Pinaceae, gnetophytes, Orchidaceae and Geraniales confirming the independent and complete loss of NDH in these diverse seed plant taxa.ConclusionThe broad phylogenetic distribution of NDH loss and the subtle phenotypes of mutants suggest that the NDH complex is of limited biological significance in contemporary plants. While NDH activity appears dispensable under favorable conditions, there were likely sufficiently frequent episodes of abiotic stress affecting terrestrial habitats to allow the retention of NDH activity. These findings reveal genetic factors influencing plant/environment interactions in a changing climate through 450 million years of land plant evolution.

【 授权许可】

Unknown   
© Ruhlman et al.; licensee BioMed Central. 2015. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.