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Zhu Y, Narsai R, He C, Štaka Z, Bai C, Berkowitz O, Liew LC, Whelan J. Overexpression of the transcription factor ANAC017 results in a genomes uncoupled phenotype under lincomycin. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024. [PMID: 39145415 DOI: 10.1111/tpj.16973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 12/18/2023] [Accepted: 07/29/2024] [Indexed: 08/16/2024]
Abstract
Over-expression (OE) lines for the ER-tethered NAC transcription factor ANAC017 displayed de-repression of gun marker genes when grown on lincomycin (lin). RNA-seq revealed that ANAC017OE2 plants constitutively expressed greater than 40% of the genes induced in wild-type with lin treatment, including plastid encoded genes ycf1.2 and the gene cluster ndhH-ndhA-ndhI-ndhG-ndhE-psaC-ndhD, documented as direct RNA targets of GUN1. Genes encoding components involved in organelle translation were enriched in constitutively expressed genes in ANAC017OE2. ANAC017OE resulted in constitutive location in the nucleus and significant constitutive binding of ANAC017 was detected by ChIP-Seq to target genes. ANAC017OE2 lines maintained the ability to green on lin, were more ABA sensitive, did not show photo-oxidative damage after exposure of de-etiolated seedlings to continuous light and the transcriptome response to lin were as much as 80% unique compared to gun1-1. Both double mutants, gun1-1:ANAC017OE and bzip60:ANAC017OE (but not single bzip60), have a gun molecular gene expression pattern and result in variegated and green plants, suggesting that ANAC017OE may act through an independent pathway compared to gun1. Over-expression of ANAC013 or rcd1 did not produce a GUN phenotype or green plants on lin. Thus, constitutive ANAC017OE2 establishes an alternative transcriptional program that likely acts through a number of pathways, that is, maintains plastid gene expression, and induction of a variety of transcription factors involved in reactive oxygen species metabolism, priming plants for lin tolerance to give a gun phenotype.
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Affiliation(s)
- Yanqiao Zhu
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
- International Science and Technology Cooperation Base on Engineering Biology, International Campus of Zhejiang University, Haining, Zhejiang, 314400, People's Republic of China
| | - Reena Narsai
- Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, 3086, Victoria, Australia
| | - Cunman He
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
- International Science and Technology Cooperation Base on Engineering Biology, International Campus of Zhejiang University, Haining, Zhejiang, 314400, People's Republic of China
- Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, 3086, Victoria, Australia
| | - Zorana Štaka
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Chen Bai
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
| | - Oliver Berkowitz
- Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, 3086, Victoria, Australia
| | - Lim Chee Liew
- Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, 3086, Victoria, Australia
| | - James Whelan
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China
- International Science and Technology Cooperation Base on Engineering Biology, International Campus of Zhejiang University, Haining, Zhejiang, 314400, People's Republic of China
- Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, 3086, Victoria, Australia
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Porcher A, Kangasjärvi S. Plant biology: Unlocking mitochondrial stress signals. Curr Biol 2024; 34:R59-R61. [PMID: 38262360 DOI: 10.1016/j.cub.2023.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Environmental stress induces mitochondrial retrograde signals that prompt protective responses in plants. The elusive mitochondrial signal has now been uncovered in a new study, which identifies formation of reactive oxygen species inside mitochondria as the key trigger of stress signals.
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Affiliation(s)
- Alexis Porcher
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, Department of Agricultural Sciences, Faculty of Agriculture and Forestry, Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
| | - Saijaliisa Kangasjärvi
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, Department of Agricultural Sciences, Faculty of Agriculture and Forestry, Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland.
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He C, Berkowitz O, Hu S, Zhao Y, Qian K, Shou H, Whelan J, Wang Y. Co-regulation of mitochondrial and chloroplast function: Molecular components and mechanisms. PLANT COMMUNICATIONS 2023; 4:100496. [PMID: 36435968 PMCID: PMC9860188 DOI: 10.1016/j.xplc.2022.100496] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/20/2022] [Accepted: 11/23/2022] [Indexed: 06/16/2023]
Abstract
The metabolic interdependence, interactions, and coordination of functions between chloroplasts and mitochondria are established and intensively studied. However, less is known about the regulatory components that control these interactions and their responses to external stimuli. Here, we outline how chloroplastic and mitochondrial activities are coordinated via common components involved in signal transduction pathways, gene regulatory events, and post-transcriptional processes. The endoplasmic reticulum emerges as a point of convergence for both transcriptional and post-transcriptional pathways that coordinate chloroplast and mitochondrial functions. Although the identification of molecular components and mechanisms of chloroplast and mitochondrial signaling increasingly suggests common players, this raises the question of how these allow for distinct organelle-specific downstream pathways. Outstanding questions with respect to the regulation of post-transcriptional pathways and the cell and/or tissue specificity of organelle signaling are crucial for understanding how these pathways are integrated at a whole-plant level to optimize plant growth and its response to changing environmental conditions.
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Affiliation(s)
- Cunman He
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China; Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, VIC 3086, Australia
| | - Oliver Berkowitz
- Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, VIC 3086, Australia
| | - Shanshan Hu
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China; International Science and Technology Cooperation Base on Engineering Biology, International Campus of Zhejiang University, Haining, Zhejiang 314400, P.R. China
| | - Yang Zhao
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China; Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, VIC 3086, Australia
| | - Kun Qian
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China; Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, VIC 3086, Australia
| | - Huixia Shou
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China; International Science and Technology Cooperation Base on Engineering Biology, International Campus of Zhejiang University, Haining, Zhejiang 314400, P.R. China
| | - James Whelan
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China; Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, VIC 3086, Australia; International Science and Technology Cooperation Base on Engineering Biology, International Campus of Zhejiang University, Haining, Zhejiang 314400, P.R. China
| | - Yan Wang
- College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, P.R. China; Department of Animal, Plant and Soil Science, School of Agriculture, Biomedical and Environmental Sciences, La Trobe University, Bundoora, VIC 3086, Australia.
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