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BMC Plant Biol. 2015 Apr 11;15:100. doi: 10.1186/s12870-015-0484-7.

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

Author information

1
Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA. truhlman@austin.utexas.edu.
2
Agricultural Biotechnology Research Center of Academia Sinica, Agricultural Technology Building, No. 128, Sec. 2, Academia Road, Nankang, Taipei, 115, Taiwan. yualbert@gate.sinica.edu.tw.
3
Institute of Biomedical Sciences, National Chung Hsing University, Taichung, Taiwan. jwchen@dragon.nchu.edu.tw.
4
Department of Computer Science and Information Engineering, National Chung Cheng University, Chia-Yi, Taiwan. ythuang@cs.ccu.edu.tw.
5
Agricultural Biotechnology Research Center of Academia Sinica, Agricultural Technology Building, No. 128, Sec. 2, Academia Road, Nankang, Taipei, 115, Taiwan. mbmtchan@gate.sinica.edu.tw.
6
Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA. jinzhang.zj@gmail.com.
7
Agricultural Biotechnology Research Center of Academia Sinica, Agricultural Technology Building, No. 128, Sec. 2, Academia Road, Nankang, Taipei, 115, Taiwan. derchyh@gate.sinica.edu.tw.
8
Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA. chrisblazier@yahoo.com.
9
Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China. xiaohuajin@ibcas.ac.cn.
10
Agricultural Biotechnology Research Center of Academia Sinica, Agricultural Technology Building, No. 128, Sec. 2, Academia Road, Nankang, Taipei, 115, Taiwan. mcshih@gate.sinica.edu.tw.
11
Department of Integrative Biology, University of Texas at Austin, Austin, TX, USA. jansen@austin.utexas.edu.
12
Department of Biological Science, Biotechnology Research Group, King Abdulaziz University, Jeddah, 21589, Saudi Arabia. jansen@austin.utexas.edu.
13
Agricultural Biotechnology Research Center of Academia Sinica, Agricultural Technology Building, No. 128, Sec. 2, Academia Road, Nankang, Taipei, 115, Taiwan. cslin99@gate.sinica.edu.tw.

Abstract

BACKGROUND:

Key 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.

RESULTS:

Nuclear 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.

CONCLUSION:

The 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.

PMID:
25886915
PMCID:
PMC4404220
DOI:
10.1186/s12870-015-0484-7
[Indexed for MEDLINE]
Free PMC Article

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