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Shriti S, Bhar A, Roy A. Unveiling the role of epigenetic mechanisms and redox signaling in alleviating multiple abiotic stress in plants. FRONTIERS IN PLANT SCIENCE 2024; 15:1456414. [PMID: 39363922 PMCID: PMC11446805 DOI: 10.3389/fpls.2024.1456414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Accepted: 08/30/2024] [Indexed: 10/05/2024]
Abstract
Anthropogenic activities and subsequent global climate change instigate drastic crop productivity and yield changes. These changes comprise a rise in the number and severity of plant stress factors, which can arise simultaneously or sequentially. When abiotic stress factors are combined, their impact on plants is more substantial than that of a singleton stress factor. One such impact is the alteration of redox cellular homeostasis, which, in turn, can regulate downstream stress-responsive gene expression and resistance response. The epigenetic regulation of gene expression in response to varied stress factors is an interesting phenomenon, which, conversely, can be stable and heritable. The epigenetic control in plants in response to abiotic stress combinations and their interactions with cellular redox alteration is an emerging field to commemorate crop yield management under climate change. The article highlights the integration of the redox signaling pathways and epigenetic regulations as pivotal components in the complex network of plant responses against multi-combinatorial stresses across time and space. This review aims to lay the foundation for developing novel approaches to mitigate the impact of environmental stresses on crop productivity, bridging the gap between theoretical understanding and practical solutions in the face of a changing climate and anthropogenic disturbances.
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Affiliation(s)
- Surbhi Shriti
- Division of Plant Biology, Bose Institute, Kolkata, West Bengal, India
| | - Anirban Bhar
- Post Graduate Department of Botany, Ramakrishna Mission Vivekananda Centenary College (Autonomous), Rahara, Kolkata, India
| | - Amit Roy
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Prague, Czechia
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2
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Otegui MS, Steelheart C, Ma W, Ma J, Kang BH, De Medina Hernandez VS, Dagdas Y, Gao C, Goto-Yamada S, Oikawa K, Nishimura M. Vacuolar degradation of plant organelles. THE PLANT CELL 2024; 36:3036-3056. [PMID: 38657116 PMCID: PMC11371181 DOI: 10.1093/plcell/koae128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/21/2024] [Accepted: 03/21/2024] [Indexed: 04/26/2024]
Abstract
Plants continuously remodel and degrade their organelles due to damage from their metabolic activities and environmental stressors, as well as an integral part of their cell differentiation programs. Whereas certain organelles use local hydrolytic enzymes for limited remodeling, most of the pathways that control the partial or complete dismantling of organelles rely on vacuolar degradation. Specifically, selective autophagic pathways play a crucial role in recognizing and sorting plant organelle cargo for vacuolar clearance, especially under cellular stress conditions induced by factors like heat, drought, and damaging light. In these short reviews, we discuss the mechanisms that control the vacuolar degradation of chloroplasts, mitochondria, endoplasmic reticulum, Golgi, and peroxisomes, with an emphasis on autophagy, recently discovered selective autophagy receptors for plant organelles, and crosstalk with other catabolic pathways.
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Affiliation(s)
- Marisa S Otegui
- Department of Botany and Center for Quantitative Cell Imaging, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Charlotte Steelheart
- Department of Botany and Center for Quantitative Cell Imaging, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Wenlong Ma
- School of Life Sciences, Centre for Cell and Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Juncai Ma
- School of Life Sciences, Centre for Cell and Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Byung-Ho Kang
- School of Life Sciences, Centre for Cell and Developmental Biology and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | | | - Yasin Dagdas
- Gregor Mendel Institute (GMI), Austrian Academy of Sciences, Vienna BioCenter (VBC), Vienna 1030, Austria
| | - Caiji Gao
- Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, School of Life Sciences, South China Normal University, Guangzhou 510631, China
| | - Shino Goto-Yamada
- Malopolska Centre of Biotechnology, Jagiellonian University, Krakow 30-348, Poland
| | - Kazusato Oikawa
- Division of Symbiotic Systems, National Institute for Basic Biology, Okazaki 444-8585, Japan
| | - Mikio Nishimura
- Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan
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3
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Demircan N, Sonmez MC, Akyol TY, Ozgur R, Turkan I, Dietz KJ, Uzilday B. Alternative electron sinks in chloroplasts and mitochondria of halophytes as a safety valve for controlling ROS production during salinity. PHYSIOLOGIA PLANTARUM 2024; 176:e14397. [PMID: 38894507 DOI: 10.1111/ppl.14397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 05/07/2024] [Accepted: 05/12/2024] [Indexed: 06/21/2024]
Abstract
Electron flow through the electron transport chain (ETC) is essential for oxidative phosphorylation in mitochondria and photosynthesis in chloroplasts. Electron fluxes depend on environmental parameters, e.g., ionic and osmotic conditions and endogenous factors, and this may cause severe imbalances. Plants have evolved alternative sinks to balance the reductive load on the electron transport chains in order to avoid overreduction, generation of reactive oxygen species (ROS), and to cope with environmental stresses. These sinks act primarily as valves for electron drainage and secondarily as regulators of tolerance-related metabolism, utilizing the excess reductive energy. High salinity is an environmental stressor that stimulates the generation of ROS and oxidative stress, which affects growth and development by disrupting the redox homeostasis of plants. While glycophytic plants are sensitive to high salinity, halophytic plants tolerate, grow, and reproduce at high salinity. Various studies have examined the ETC systems of glycophytic plants, however, information about the state and regulation of ETCs in halophytes under non-saline and saline conditions is scarce. This review focuses on alternative electron sinks in chloroplasts and mitochondria of halophytic plants. In cases where information on halophytes is lacking, we examined the available knowledge on the relationship between alternative sinks and gradual salinity resilience of glycophytes. To this end, transcriptional responses of involved components of photosynthetic and respiratory ETCs were compared between the glycophyte Arabidopsis thaliana and the halophyte Schrenkiella parvula, and the time-courses of these transcripts were examined in A. thaliana. The observed regulatory patterns are discussed in the context of reactive molecular species formation in halophytes and glycophytes.
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Affiliation(s)
- Nil Demircan
- Department of Biology, Faculty of Science, Ege University, Izmir, Türkiye
| | | | - Turgut Yigit Akyol
- Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | - Rengin Ozgur
- Department of Biology, Faculty of Science, Ege University, Izmir, Türkiye
| | - Ismail Turkan
- Department of Soil and Plant Nutrition, Faculty of Agricultural Sciences and Technologies, Yasar University, İzmir, Türkiye
| | - Karl-Josef Dietz
- Faculty of Biology, Department of Biochemistry and Physiology of Plants, University of Bielefeld, Bielefeld, Germany
| | - Baris Uzilday
- Department of Biology, Faculty of Science, Ege University, Izmir, Türkiye
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4
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Renziehausen T, Frings S, Schmidt-Schippers R. 'Against all floods': plant adaptation to flooding stress and combined abiotic stresses. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2024; 117:1836-1855. [PMID: 38217848 DOI: 10.1111/tpj.16614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 11/28/2023] [Accepted: 12/15/2023] [Indexed: 01/15/2024]
Abstract
Current climate change brings with it a higher frequency of environmental stresses, which occur in combination rather than individually leading to massive crop losses worldwide. In addition to, for example, drought stress (low water availability), also flooding (excessive water) can threaten the plant, causing, among others, an energy crisis due to hypoxia, which is responded to by extensive transcriptional, metabolic and growth-related adaptations. While signalling during flooding is relatively well understood, at least in model plants, the molecular mechanisms of combinatorial flooding stress responses, for example, flooding simultaneously with salinity, temperature stress and heavy metal stress or sequentially with drought stress, remain elusive. This represents a significant gap in knowledge due to the fact that dually stressed plants often show unique responses at multiple levels not observed under single stress. In this review, we (i) consider possible effects of stress combinations from a theoretical point of view, (ii) summarize the current state of knowledge on signal transduction under single flooding stress, (iii) describe plant adaptation responses to flooding stress combined with four other abiotic stresses and (iv) propose molecular components of combinatorial flooding (hypoxia) stress adaptation based on their reported dual roles in multiple stresses. This way, more future emphasis may be placed on deciphering molecular mechanisms of combinatorial flooding stress adaptation, thereby potentially stimulating development of molecular tools to improve plant resilience towards multi-stress scenarios.
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Affiliation(s)
- Tilo Renziehausen
- Plant Biotechnology, Faculty of Biology, University of Bielefeld, 33615, Bielefeld, Germany
- Center for Biotechnology, University of Bielefeld, 33615, Bielefeld, Germany
| | - Stephanie Frings
- Plant Biotechnology, Faculty of Biology, University of Bielefeld, 33615, Bielefeld, Germany
- Center for Biotechnology, University of Bielefeld, 33615, Bielefeld, Germany
| | - Romy Schmidt-Schippers
- Plant Biotechnology, Faculty of Biology, University of Bielefeld, 33615, Bielefeld, Germany
- Center for Biotechnology, University of Bielefeld, 33615, Bielefeld, Germany
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5
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Lima RPM, Oliveira JS, do Nascimento LC, Labate MTV, Labate CA, Barreto P, Maia IDG. High-throughput analysis reveals disturbances throughout the cell caused by Arabidopsis UCP1 and UCP3 double knockdown. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108324. [PMID: 38183903 DOI: 10.1016/j.plaphy.2023.108324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/12/2023] [Accepted: 12/27/2023] [Indexed: 01/08/2024]
Abstract
Three genes encoding mitochondrial uncoupling proteins (UCPs) have been described in Arabidopsis thaliana (UCP1 to UCP3). In plants, UCPs may act as an uncoupler or as an aspartate/glutamate exchanger. For instance, much of the data regarding UCP functionality were obtained for the UCP1 and UCP2 isoforms compared with UCP3. Here, to get a better understanding about the concerted action of UCP1 and UCP3 in planta, we investigated the transcriptome and metabolome profiles of ucp1 ucp3 double mutant plants during the vegetative phase. For that, 21-day-old mutant plants, which displayed the most evident phenotypic alterations compared to wild type (WT) plants, were employed. The double knockdown of UCP1 and UCP3, isoforms unequivocally present inside the mitochondria, promoted important transcriptional reprogramming with alterations in the expression of genes related to mitochondrial and chloroplast function as well as those responsive to abiotic stress, suggesting disturbances throughout the cell. The observed transcriptional changes were well integrated with the metabolomic data of ucp1 ucp3 plants. Alterations in metabolites related to primary and secondary metabolism, particularly enriched in the Alanine, Aspartate and Glutamate metabolism, were detected. These findings extend our knowledge of the underlying roles played by UCP3 in concert with UCP1 at the whole plant level.
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Affiliation(s)
- Rômulo Pedro Macêdo Lima
- Departamento de Ciências Químicas e Biológicas (Setor Genética), Instituto de Biociências, UNESP, CEP 18618-689, Botucatu, SP, Brazil
| | - Jakeline Santos Oliveira
- Departamento de Biologia Estrutural e Funcional (Setor Fisiologia), Instituto de Biociências, UNESP, CEP 18618-689, Botucatu, SP, Brazil
| | | | | | - Carlos Alberto Labate
- Departamento de Genética, Escola Superior de Agricultura "Luiz de Queiroz", USP, CEP 13418-260, Piracicaba, SP, Brazil
| | - Pedro Barreto
- Departamento de Ciências Químicas e Biológicas (Setor Genética), Instituto de Biociências, UNESP, CEP 18618-689, Botucatu, SP, Brazil
| | - Ivan de Godoy Maia
- Departamento de Ciências Químicas e Biológicas (Setor Genética), Instituto de Biociências, UNESP, CEP 18618-689, Botucatu, SP, Brazil.
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Zhang R, Fang J, Qi T, Zhu S, Yao L, Fang G, Li Y, Zang X, Xu W, Hao W, Liu S, Yang D, Chen D, Yang J, Ma X, Wu L. Maternal aging increases offspring adult body size via transmission of donut-shaped mitochondria. Cell Res 2023; 33:821-834. [PMID: 37500768 PMCID: PMC10624822 DOI: 10.1038/s41422-023-00854-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 06/21/2023] [Indexed: 07/29/2023] Open
Abstract
Maternal age at childbearing has continued to increase in recent decades. However, whether and how it influences offspring adult traits are largely unknown. Here, using adult body size as the primary readout, we reveal that maternal rather than paternal age has an evolutionarily conserved effect on offspring adult traits in humans, Drosophila, and Caenorhabditis elegans. Elucidating the mechanisms of such effects in humans and other long-lived animals remains challenging due to their long life course and difficulties in conducting in vivo studies. We thus employ the short-lived and genetically tractable nematode C. elegans to explore the mechanisms underlying the regulation of offspring adult trait by maternal aging. By microscopic analysis, we find that old worms transmit aged mitochondria with a donut-like shape to offspring. These mitochondria are rejuvenated in the offspring's early life, with their morphology fully restored before adulthood in an AMPK-dependent manner. Mechanistically, we demonstrate that early-life mitochondrial dysfunction activates AMPK, which in turn not only alleviates mitochondrial abnormalities but also activates TGFβ signaling to increase offspring adult size. Together, our findings provide mechanistic insight into the ancient role of maternal aging in shaping the traits of adult offspring.
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Affiliation(s)
- Runshuai Zhang
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China
- Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China
| | - Jinan Fang
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China
| | - Ting Qi
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
| | - Shihao Zhu
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China
- Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China
| | - Luxia Yao
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China
- Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China
| | - Guicun Fang
- Microscopy Core Facility, Westlake University, Hangzhou, Zhejiang, China
| | - Yunsheng Li
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
| | - Xiao Zang
- Model Animal Research Center of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Weina Xu
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China
- Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China
| | - Wanyu Hao
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China
- Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China
| | - Shouye Liu
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
- Institute for Molecular Bioscience, University of Queensland, St Lucia, Brisbane, QLD, Australia
| | - Dan Yang
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China
| | - Di Chen
- Model Animal Research Center of Medical School, Nanjing University, Nanjing, Jiangsu, China
| | - Jian Yang
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China.
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China.
| | - Xianjue Ma
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China.
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China.
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China.
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China.
| | - Lianfeng Wu
- Westlake Laboratory of Life Sciences and Biomedicine, Hangzhou, Zhejiang, China.
- School of Life Sciences, Westlake University, Hangzhou, Zhejiang, China.
- Key Laboratory of Growth Regulation and Translational Research of Zhejiang Province, Hangzhou, Zhejiang, China.
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang, China.
- Institute of Basic Medical Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China.
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Barreto P, Koltun A, Nonato J, Yassitepe J, Maia IDG, Arruda P. Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses. Int J Mol Sci 2022; 23:ijms231911176. [PMID: 36232478 PMCID: PMC9570015 DOI: 10.3390/ijms231911176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/29/2022] [Accepted: 09/02/2022] [Indexed: 11/16/2022] Open
Abstract
The interaction of mitochondria with cellular components evolved differently in plants and mammals; in plants, the organelle contains proteins such as ALTERNATIVE OXIDASES (AOXs), which, in conjunction with internal and external ALTERNATIVE NAD(P)H DEHYDROGENASES, allow canonical oxidative phosphorylation (OXPHOS) to be bypassed. Plant mitochondria also contain UNCOUPLING PROTEINS (UCPs) that bypass OXPHOS. Recent work revealed that OXPHOS bypass performed by AOXs and UCPs is linked with new mechanisms of mitochondrial retrograde signaling. AOX is functionally associated with the NO APICAL MERISTEM transcription factors, which mediate mitochondrial retrograde signaling, while UCP1 can regulate the plant oxygen-sensing mechanism via the PRT6 N-Degron. Here, we discuss the crosstalk or the independent action of AOXs and UCPs on mitochondrial retrograde signaling associated with abiotic stress responses. We also discuss how mitochondrial function and retrograde signaling mechanisms affect chloroplast function. Additionally, we discuss how mitochondrial inner membrane transporters can mediate mitochondrial communication with other organelles. Lastly, we review how mitochondrial metabolism can be used to improve crop resilience to environmental stresses. In this respect, we particularly focus on the contribution of Brazilian research groups to advances in the topic of mitochondrial metabolism and signaling.
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Affiliation(s)
- Pedro Barreto
- Departamento de Ciências Químicas e Biológicas, Instituto de Biociências, Universidade Estadual Paulista, Botucatu 18618-970, Brazil
| | - Alessandra Koltun
- Genomics for Climate Change Research Center, Universidade Estadual de Campinas, Campinas 13083-875, Brazil
- Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-862, Brazil
| | - Juliana Nonato
- Genomics for Climate Change Research Center, Universidade Estadual de Campinas, Campinas 13083-875, Brazil
- Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-862, Brazil
| | - Juliana Yassitepe
- Genomics for Climate Change Research Center, Universidade Estadual de Campinas, Campinas 13083-875, Brazil
- Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-862, Brazil
- Embrapa Agricultura Digital, Campinas 13083-886, Brazil
| | - Ivan de Godoy Maia
- Departamento de Ciências Químicas e Biológicas, Instituto de Biociências, Universidade Estadual Paulista, Botucatu 18618-970, Brazil
| | - Paulo Arruda
- Genomics for Climate Change Research Center, Universidade Estadual de Campinas, Campinas 13083-875, Brazil
- Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas, Campinas 13083-862, Brazil
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, Campinas 13083-875, Brazil
- Correspondence:
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Lima RPM, Nunes-Laitz AV, Arcuri MDLC, Campos FG, Joca TAC, Monteiro GC, Kushima H, Lima GPP, de Almeida LFR, Barreto P, de Godoy Maia I. The double knockdown of the mitochondrial uncoupling protein isoforms reveals partial redundant roles during Arabidopsis thaliana vegetative and reproductive development. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 322:111365. [PMID: 35779675 DOI: 10.1016/j.plantsci.2022.111365] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 06/22/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
Mitochondrial uncoupling proteins (UCPs) are specialized proteins capable of dissipating the proton electrochemical gradient generated in respiration independent of ATP synthesis. Three UCP coding genes with distinct expression patterns have been identified in Arabidopsis thaliana (namely UCP1, UCP2 and UCP3). Here, we generated T-DNA double-insertion mutants (ucp1 ucp2, ucp1 ucp3 and ucp2 ucp3) to investigate the functionality of the Arabidopsis UCP isoforms. A strong compensatory effect of the wild-type UCP gene was found in the double-knockdown lines. Higher levels of reactive oxygen species (ROS) were observed in vegetative and reproductive organs of double mutant plants. This exacerbated oxidative stress in plants also increased lipid peroxidation but was not compensated by the activation of the antioxidant system. Alterations in O2 consumption and ADP/ATP ratio were also observed, suggesting a change in mitochondrial energy-generating processes. Deficiencies in double-mutants were not limited to mitochondria and also changed photosynthetic efficiency and redox state. Our results indicate that UCP2 and UCP3 have complementary function with UCP1 in plant reproductive and vegetative organ/tissues, as well as in stress adaptation. The partial redundancy between the UCP isoforms suggests that they could act separately or jointly on mitochondrial homeostasis during A. thaliana development.
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Affiliation(s)
- Rômulo Pedro Macêdo Lima
- Departamento de Ciências Químicas e Biológicas (Setor Genética), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | | | - Mariana de Lara Campos Arcuri
- Departamento de Ciências Químicas e Biológicas (Setor Genética), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Felipe Girotto Campos
- Departamento de Bioestatística, Biologia Vegetal, Parasitologia e Zoologia (Setor Botânica), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Thaís Arruda Costa Joca
- Departamento de Bioestatística, Biologia Vegetal, Parasitologia e Zoologia (Setor Botânica), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Gean Charles Monteiro
- Departamento de Ciências Químicas e Biológicas (Setor de Química e Bioquímica), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Hélio Kushima
- Departamento de Biofísica e Farmacologia (Setor Farmacologia), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Giuseppina Pace Pereira Lima
- Departamento de Ciências Químicas e Biológicas (Setor de Química e Bioquímica), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Luiz Fernando Rolim de Almeida
- Departamento de Bioestatística, Biologia Vegetal, Parasitologia e Zoologia (Setor Botânica), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Pedro Barreto
- Departamento de Ciências Químicas e Biológicas (Setor Genética), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil
| | - Ivan de Godoy Maia
- Departamento de Ciências Químicas e Biológicas (Setor Genética), Instituto de Biociências, UNESP, CEP 18618-689 Botucatu, SP, Brazil.
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9
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Fuchs P, Bohle F, Lichtenauer S, Ugalde JM, Feitosa Araujo E, Mansuroglu B, Ruberti C, Wagner S, Müller-Schüssele SJ, Meyer AJ, Schwarzländer M. Reductive stress triggers ANAC017-mediated retrograde signaling to safeguard the endoplasmic reticulum by boosting mitochondrial respiratory capacity. THE PLANT CELL 2022; 34:1375-1395. [PMID: 35078237 PMCID: PMC9125394 DOI: 10.1093/plcell/koac017] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 12/18/2021] [Indexed: 05/16/2023]
Abstract
Redox processes are at the heart of universal life processes, such as metabolism, signaling, or folding of secreted proteins. Redox landscapes differ between cell compartments and are strictly controlled to tolerate changing conditions and to avoid cell dysfunction. While a sophisticated antioxidant network counteracts oxidative stress, our understanding of reductive stress responses remains fragmentary. Here, we observed root growth impairment in Arabidopsis thaliana mutants of mitochondrial alternative oxidase 1a (aox1a) in response to the model thiol reductant dithiothreitol (DTT). Mutants of mitochondrial uncoupling protein 1 (ucp1) displayed a similar phenotype indicating that impaired respiratory flexibility led to hypersensitivity. Endoplasmic reticulum (ER) stress was enhanced in the mitochondrial mutants and limiting ER oxidoreductin capacity in the aox1a background led to synergistic root growth impairment by DTT, indicating that mitochondrial respiration alleviates reductive ER stress. The observations that DTT triggered nicotinamide adenine dinucleotide (NAD) reduction in vivo and that the presence of thiols led to electron transport chain activity in isolated mitochondria offer a biochemical framework of mitochondrion-mediated alleviation of thiol-mediated reductive stress. Ablation of transcription factor Arabidopsis NAC domain-containing protein17 (ANAC017) impaired the induction of AOX1a expression by DTT and led to DTT hypersensitivity, revealing that reductive stress tolerance is achieved by adjusting mitochondrial respiratory capacity via retrograde signaling. Our data reveal an unexpected role for mitochondrial respiratory flexibility and retrograde signaling in reductive stress tolerance involving inter-organelle redox crosstalk.
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Affiliation(s)
- Philippe Fuchs
- Institute of Plant Biology and Biotechnology (IBBP), Westfälische Wilhelms-Universität Münster, D-48143 Münster, Germany
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
| | - Finja Bohle
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
| | - Sophie Lichtenauer
- Institute of Plant Biology and Biotechnology (IBBP), Westfälische Wilhelms-Universität Münster, D-48143 Münster, Germany
| | - José Manuel Ugalde
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
| | - Elias Feitosa Araujo
- Institute of Plant Biology and Biotechnology (IBBP), Westfälische Wilhelms-Universität Münster, D-48143 Münster, Germany
| | - Berivan Mansuroglu
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
| | - Cristina Ruberti
- Institute of Plant Biology and Biotechnology (IBBP), Westfälische Wilhelms-Universität Münster, D-48143 Münster, Germany
| | - Stephan Wagner
- Institute of Plant Biology and Biotechnology (IBBP), Westfälische Wilhelms-Universität Münster, D-48143 Münster, Germany
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
| | - Stefanie J Müller-Schüssele
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
| | - Andreas J Meyer
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
| | - Markus Schwarzländer
- Institute of Plant Biology and Biotechnology (IBBP), Westfälische Wilhelms-Universität Münster, D-48143 Münster, Germany
- Institute of Crop Science and Resource Conservation (INRES), Rheinische Friedrich-Wilhelms-Universität Bonn, D-53113 Bonn, Germany
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10
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Barreto P, Dambire C, Sharma G, Vicente J, Osborne R, Yassitepe J, Gibbs DJ, Maia IG, Holdsworth MJ, Arruda P. Mitochondrial retrograde signaling through UCP1-mediated inhibition of the plant oxygen-sensing pathway. Curr Biol 2022; 32:1403-1411.e4. [PMID: 35114096 PMCID: PMC8967405 DOI: 10.1016/j.cub.2022.01.037] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/10/2021] [Accepted: 01/12/2022] [Indexed: 12/19/2022]
Abstract
Mitochondrial retrograde signaling is an important component of intracellular stress signaling in eukaryotes. UNCOUPLING PROTEIN (UCP)1 is an abundant plant inner-mitochondrial membrane protein with multiple functions including uncoupled respiration and amino-acid transport1,2 that influences broad abiotic stress responses. Although the mechanism(s) through which this retrograde function acts is unknown, overexpression of UCP1 activates expression of hypoxia (low oxygen)-associated nuclear genes.3,4 Here we show in Arabidopsis thaliana that UCP1 influences nuclear gene expression and physiological response by inhibiting the cytoplasmic PLANT CYSTEINE OXIDASE (PCO) branch of the PROTEOLYSIS (PRT)6 N-degron pathway, a major mechanism of oxygen and nitric oxide (NO) sensing.5 Overexpression of UCP1 (UCP1ox) resulted in the stabilization of an artificial PCO N-degron pathway substrate, and stability of this reporter protein was influenced by pharmacological interventions that control UCP1 activity. Hypoxia and salt-tolerant phenotypes observed in UCP1ox lines resembled those observed for the PRT6 N-recognin E3 ligase mutant prt6-1. Genetic analysis showed that UCP1 regulation of hypoxia responses required the activity of PCO N-degron pathway ETHYLENE RESPONSE FACTOR (ERF)VII substrates. Transcript expression analysis indicated that UCP1 regulation of hypoxia-related gene expression is a normal component of seedling development. Our results show that mitochondrial retrograde signaling represses the PCO N-degron pathway, enhancing substrate function, thus facilitating downstream stress responses. This work reveals a novel mechanism through which mitochondrial retrograde signaling influences nuclear response to hypoxia by inhibition of an ancient cytoplasmic pathway of eukaryotic oxygen sensing. UCP1 inhibits the PCO branch of the PRT6 N-degron pathway Inhibition leads to substrate stabilization and altered gene expression Inhibition transduces UCP1 function during development and in response to stress
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Affiliation(s)
- Pedro Barreto
- Departamento de Ciências Químicas e Biológicas, Instituto de Biociências de Botucatu, UNESP, Botucatu 18618-970, SP, Brazil
| | - Charlene Dambire
- School of Biosciences, University of Nottingham, Loughborough, Leicestershire LE12 5RD, UK
| | - Gunjan Sharma
- School of Biosciences, University of Nottingham, Loughborough, Leicestershire LE12 5RD, UK
| | - Jorge Vicente
- School of Biosciences, University of Nottingham, Loughborough, Leicestershire LE12 5RD, UK
| | - Rory Osborne
- School of Biosciences, University of Birmingham, Edgbaston B15 2TT, UK
| | - Juliana Yassitepe
- Genomics for Climate Change Research Center, Universidade Estadual de Campinas, Campinas 13083-875, SP, Brazil
| | - Daniel J Gibbs
- School of Biosciences, University of Birmingham, Edgbaston B15 2TT, UK
| | - Ivan G Maia
- Departamento de Ciências Químicas e Biológicas, Instituto de Biociências de Botucatu, UNESP, Botucatu 18618-970, SP, Brazil
| | - Michael J Holdsworth
- School of Biosciences, University of Nottingham, Loughborough, Leicestershire LE12 5RD, UK.
| | - Paulo Arruda
- Genomics for Climate Change Research Center, Universidade Estadual de Campinas, Campinas 13083-875, SP, Brazil; Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-862 Campinas, SP, Brazil; Centro de Biologia Molecular e Engenharia Genetica, Universidade Estadual de Campinas, Campinas 13083-875, SP, Brazil.
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11
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Popov VN, Syromyatnikov MY, Fernie AR, Chakraborty S, Gupta KJ, Igamberdiev AU. The uncoupling of respiration in plant mitochondria: keeping reactive oxygen and nitrogen species under control. JOURNAL OF EXPERIMENTAL BOTANY 2021; 72:793-807. [PMID: 33245770 DOI: 10.1093/jxb/eraa510] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
Plant mitochondrial respiration involves the operation of various alternative pathways. These pathways participate, both directly and indirectly, in the maintenance of mitochondrial functions though they do not contribute to energy production, being uncoupled from the generation of an electrochemical gradient across the mitochondrial membrane and thus from ATP production. Recent findings suggest that uncoupled respiration is involved in reactive oxygen species (ROS) and nitric oxide (NO) scavenging, regulation, and homeostasis. Here we discuss specific roles and possible functions of uncoupled mitochondrial respiration in ROS and NO metabolism. The mechanisms of expression and regulation of the NDA-, NDB- and NDC-type non-coupled NADH and NADPH dehydrogenases, the alternative oxidase (AOX), and the uncoupling protein (UCP) are examined in relation to their involvement in the establishment of the stable far-from-equilibrium state of plant metabolism. The role of uncoupled respiration in controlling the levels of ROS and NO as well as inducing signaling events is considered. Secondary functions of uncoupled respiration include its role in protection from stress factors and roles in biosynthesis and catabolism. It is concluded that uncoupled mitochondrial respiration plays an important role in providing rapid adaptation of plants to changing environmental factors via regulation of ROS and NO.
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Affiliation(s)
- Vasily N Popov
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, Voronezh, Russia
- Voronezh State University of Engineering Technologies, Voronezh, Russia
| | - Mikhail Y Syromyatnikov
- Department of Genetics, Cytology and Bioengineering, Voronezh State University, Voronezh, Russia
- Voronezh State University of Engineering Technologies, Voronezh, Russia
| | - Alisdair R Fernie
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Subhra Chakraborty
- National Institute for Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | | | - Abir U Igamberdiev
- Department of Biology, Memorial University of Newfoundland, St John's, NL, Canada
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12
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Zhao X, Gao W, Yin J, Fan W, Wang Z, Hu K, Mai Y, Luan A, Xu B, Jin Q. A high-precision thermometry microfluidic chip for real-time monitoring of the physiological process of live tumour cells. Talanta 2021; 226:122101. [PMID: 33676657 DOI: 10.1016/j.talanta.2021.122101] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 01/04/2021] [Accepted: 01/09/2021] [Indexed: 11/28/2022]
Abstract
Temperature changes in cells are generally accompanied by physiological processes. Cellular temperature measurements can provide important information to fully understand cellular mechanisms. However, temperature measurements with conventional methods, such as fluorescent polymeric thermometers and thermocouples, have limitations of low sensitivity or cell state disturbance. We developed a microfluidic chip integrating a high-precision platinum (Pt) thermo-sensor that can culture cells and monitor the cellular temperature in situ. During detection, a constant temperature system with a stability of 0.015 °C was applied. The temperature coefficient of resistance of the Pt thermo-sensor was 2090 ppm/°C, giving a temperature resolution of the sensor of less than 0.008 °C. This microchip showed a good linear correlation between the temperature and resistance of the Pt sensor at 20-40 °C (R2 = 0.999). Lung and liver cancer cells on the microchip grew normally and continuously. The maximum temperature fluctuation of H1975 (0.924 °C) was larger than that of HepG2 (0.250 °C). However, the temperature of adherent HepG2 cells changed over time, showing susceptibility to the environment most of the time compared to H1975. Moreover, the temperature increment of non-cancerous cells, such as hepatic stellate cells, was monitored in response to the stimulus of paraformaldehyde, showing the process of cell death. Therefore, this thermometric microchip integrated with cell culture could be a non-disposable and label-free tool for monitoring cellular temperature applied to the study of physiology and pathology.
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Affiliation(s)
- Xuefei Zhao
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, PR China; State Key Laboratories of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, PR China
| | - Wanlei Gao
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, PR China.
| | - Jiawen Yin
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, PR China
| | - Weihua Fan
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, PR China
| | - Zhenyu Wang
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, PR China
| | - Kaikai Hu
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, PR China
| | - Yuliang Mai
- Guangdong Key Laboratory of Industrial Surfactant, Guangdong Research Institute of Petrochemical and Fine Chemical Engineering, Guangzhou, 510665, PR China
| | - Anbo Luan
- Guangdong Key Laboratory of Industrial Surfactant, Guangdong Research Institute of Petrochemical and Fine Chemical Engineering, Guangzhou, 510665, PR China
| | - Baojian Xu
- State Key Laboratories of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, PR China.
| | - Qinghui Jin
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, PR China; State Key Laboratories of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, PR China.
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13
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Characterization of In Vivo Function(s) of Members of the Plant Mitochondrial Carrier Family. Biomolecules 2020; 10:biom10091226. [PMID: 32846873 PMCID: PMC7565455 DOI: 10.3390/biom10091226] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 02/06/2023] Open
Abstract
Although structurally related, mitochondrial carrier family (MCF) proteins catalyze the specific transport of a range of diverse substrates including nucleotides, amino acids, dicarboxylates, tricarboxylates, cofactors, vitamins, phosphate and H+. Despite their name, they do not, however, always localize to the mitochondria, with plasma membrane, peroxisomal, chloroplast and thylakoid and endoplasmic reticulum localizations also being reported. The existence of plastid-specific MCF proteins is suggestive that the evolution of these proteins occurred after the separation of the green lineage. That said, plant-specific MCF proteins are not all plastid-localized, with members also situated at the endoplasmic reticulum and plasma membrane. While by no means yet comprehensive, the in vivo function of a wide range of these transporters is carried out here, and we discuss the employment of genetic variants of the MCF as a means to provide insight into their in vivo function complementary to that obtained from studies following their reconstitution into liposomes.
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14
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Barreto P, Couñago RM, Arruda P. Mitochondrial uncoupling protein-dependent signaling in plant bioenergetics and stress response. Mitochondrion 2020; 53:109-120. [DOI: 10.1016/j.mito.2020.05.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 04/06/2020] [Accepted: 05/14/2020] [Indexed: 12/15/2022]
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15
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Han KH, Arlian BM, Lin CW, Jin HY, Kang GH, Lee S, Lee PCW, Lerner RA. Agonist Antibody Converts Stem Cells into Migrating Brown Adipocyte-Like Cells in Heart. Cells 2020; 9:cells9010256. [PMID: 31968623 PMCID: PMC7017361 DOI: 10.3390/cells9010256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/16/2020] [Accepted: 01/20/2020] [Indexed: 12/17/2022] Open
Abstract
We present data showing that Iodotyrosine Deiodinase (IYD) is a dual-function enzyme acting as a catalyst in metabolism and a receptor for cooperative stem cell differentiation. IYD is present both in thyroid cells where it is critical for scavenging iodine from halogenated by-products of thyroid hormone production and on hematopoietic stem cells. To close the cooperative loop, the mono- and di-Iodotyrosine (MIT and DIT) substrates of IYD in the thyroid are also agonists for IYD now acting as a receptor on bone marrow stem cells. While studying intracellular combinatorial antibody libraries, we discovered an agonist antibody, H3 Ab, of which the target is the enzyme IYD. When agonized by H3 Ab, IYD expressed on stem cells induces differentiation of the cells into brown adipocyte-like cells, which selectively migrate to mouse heart tissue. H3 Ab also binds to IYD expressed on human myocardium. Thus, one has a single enzyme acting in different ways on different cells for the cooperative purpose of enhancing thermogenesis or of regenerating damaged heart tissue.
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Affiliation(s)
- Kyung Ho Han
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA; (K.H.H.); (C.-W.L.)
- Department of Biomedical Sciences, University of Ulsan College of Medicine, ASAN Medical Center, Seoul 05505, Korea
| | - Britni M. Arlian
- Departments of Molecular Medicine, Immunology and Microbiology, The Scripps Research Institute, La Jolla, CA 92037, USA;
| | - Chih-Wei Lin
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA; (K.H.H.); (C.-W.L.)
| | - Hyun Yong Jin
- Department of Urology, University of California, San Francisco, CA 94158, USA;
| | - Geun-Hyung Kang
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul 05505, Korea; (G.-H.K.); (S.L.)
| | - Sahmin Lee
- Division of Cardiology, Asan Medical Center Heart Institute, University of Ulsan College of Medicine, Seoul 05505, Korea; (G.-H.K.); (S.L.)
| | - Peter Chang-Whan Lee
- Department of Biomedical Sciences, University of Ulsan College of Medicine, ASAN Medical Center, Seoul 05505, Korea
- Correspondence: (P.C.-W.L.); (R.A.L.); Tel.: +82-2-3010-2799 (P.C.-W.L.); +1-858-784-8265 (R.A.L.)
| | - Richard A. Lerner
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA; (K.H.H.); (C.-W.L.)
- Correspondence: (P.C.-W.L.); (R.A.L.); Tel.: +82-2-3010-2799 (P.C.-W.L.); +1-858-784-8265 (R.A.L.)
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16
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On the Origin and Fate of Reactive Oxygen Species in Plant Cell Compartments. Antioxidants (Basel) 2019; 8:antiox8040105. [PMID: 30999668 PMCID: PMC6523537 DOI: 10.3390/antiox8040105] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 03/31/2019] [Accepted: 04/13/2019] [Indexed: 12/13/2022] Open
Abstract
Reactive oxygen species (ROS) have been recognized as important signaling compounds of major importance in a number of developmental and physiological processes in plants. The existence of cellular compartments enables efficient redox compartmentalization and ensures proper functioning of ROS-dependent signaling pathways. Similar to other organisms, the production of individual ROS in plant cells is highly localized and regulated by compartment-specific enzyme pathways on transcriptional and post-translational level. ROS metabolism and signaling in specific compartments are greatly affected by their chemical interactions with other reactive radical species, ROS scavengers and antioxidant enzymes. A dysregulation of the redox status, as a consequence of induced ROS generation or decreased capacity of their removal, occurs in plants exposed to diverse stress conditions. During stress condition, strong induction of ROS-generating systems or attenuated ROS scavenging can lead to oxidative or nitrosative stress conditions, associated with potential damaging modifications of cell biomolecules. Here, we present an overview of compartment-specific pathways of ROS production and degradation and mechanisms of ROS homeostasis control within plant cell compartments.
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17
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Kerbler SM, Taylor NL, Millar AH. Cold sensitivity of mitochondrial ATP synthase restricts oxidative phosphorylation in Arabidopsis thaliana. THE NEW PHYTOLOGIST 2019; 221:1776-1788. [PMID: 30281799 DOI: 10.1111/nph.15509] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 09/20/2018] [Indexed: 05/03/2023]
Abstract
The combined action of the electron transport chain (ETC) and ATP synthase is essential in determining energy efficiency in plants, and so is important for cellular biosynthesis, growth and development. Owing to the sessile nature of plants, mitochondria must operate over a wide temperature range in the environment, necessitating a broad temperature tolerance of their biochemical reactions. We investigated the temperature response of mitochondrial respiratory processes in isolated mitochondria and intact plants of Arabidopsis thaliana and considered the effect of instantaneous responses to temperature and acclimation responses to low temperatures. We show that at 4°C the plant mitochondrial ATP synthase is differentially inhibited compared with other elements of the respiratory pathway, leading to decreased ADP : oxygen ratios and a limitation to the rate of ATP synthesis. This effect persists in vivo and cannot be overcome by cold-temperature acclimation of plants. This mechanism adds a new element to the respiratory acclimation model and provides a direct means of temperature perception by plant mitochondria. This also provides an alternative explanation for non-phosphorylating ETC bypass mechanisms, like the alternative oxidase to maintain respiratory rates, albeit at lower ATP synthesis efficiency, in response to the sensitivity of ATP synthase to the prevailing temperature.
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Affiliation(s)
- Sandra M Kerbler
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, The University of Western Australia, Crawley, WA, 6009, Australia
| | - Nicolas L Taylor
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, The University of Western Australia, Crawley, WA, 6009, Australia
- The Institute of Agriculture, The University of Western Australia, Crawley, WA, 6009, Australia
| | - A Harvey Millar
- Australian Research Council Centre of Excellence in Plant Energy Biology, School of Molecular Sciences, The University of Western Australia, Crawley, WA, 6009, Australia
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18
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Dorigan de Matos Furlanetto AL, Valente C, Martinez GR, Merlin Rocha ME, Maurer JBB, Cadena SMSC. Cold stress on Araucaria angustifolia embryogenic cells results in oxidative stress and induces adaptation: implications for conservation and propagation. Free Radic Res 2019; 53:45-56. [DOI: 10.1080/10715762.2018.1548767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Caroline Valente
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Brazil
| | - G. R. Martinez
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Brazil
| | - M. E. Merlin Rocha
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Brazil
| | - J. B. B. Maurer
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Brazil
| | - S. M. S. C. Cadena
- Department of Biochemistry and Molecular Biology, Federal University of Paraná, Curitiba, Brazil
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19
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Wang Z, Zhao Z, Fan G, Dong Y, Deng M, Xu E, Zhai X, Cao H. A comparison of the transcriptomes between diploid and autotetraploid Paulownia fortunei under salt stress. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2019; 25:1-11. [PMID: 30804626 PMCID: PMC6352521 DOI: 10.1007/s12298-018-0578-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/08/2018] [Accepted: 06/29/2018] [Indexed: 05/06/2023]
Abstract
Paulownia is a tree species grown in many countries. Our previous study reveals that tetraploid Paulownia fortunei is more tolerant to salt stress than its corresponding diploid tree. To investigate the molecular mechanisms of salt stress tolerance in P. fortunei, the transcriptomes of normal and salt-stressed diploid and tetraploid were investigated. After assembling the clean reads, we obtained 130,842 unigenes. The unigenes were aligned against six public databases (Nr, Nt, Swiss-Prot, COG, KEGG, GO) to discover homologs and assign functional annotations. We retrieved 7983 and 15,503 differentially expressed unigenes (DEUs) between the normal and the salt-stressed diploid and tetraploid P. fortunei, respectively. We identified dozens of important DEUs including 3 related to photosynthesis, 10 related to plant growth and development and 11 related to osmolytes. Some of these DEUs were upregulated in tetraploid compared to diploid and others were upregulated under salt stress. Quantitative reverse transcriptase polymerase chain reaction verified the expression patterns of 15 unigenes. Our results provided insights into the molecular aspects why tetraploid is stronger and more energetic than diploid under saline environment. This study provides useful information for further studies on the molecular mechanisms of salt tolerance in other tree plants.
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Affiliation(s)
- Zhe Wang
- Institute of Paulownia, Henan Agricultural University, Zhengzhou, Henan People’s Republic of China
| | - Zhenli Zhao
- Institute of Paulownia, Henan Agricultural University, Zhengzhou, Henan People’s Republic of China
| | - Guoqiang Fan
- Institute of Paulownia, Henan Agricultural University, Zhengzhou, Henan People’s Republic of China
| | - Yanpeng Dong
- Institute of Paulownia, Henan Agricultural University, Zhengzhou, Henan People’s Republic of China
| | - Minjie Deng
- Institute of Paulownia, Henan Agricultural University, Zhengzhou, Henan People’s Republic of China
| | - Enkai Xu
- Institute of Paulownia, Henan Agricultural University, Zhengzhou, Henan People’s Republic of China
| | - Xiaoqiao Zhai
- Henan Academy of Forestry, Zhengzhou, Henan People’s Republic of China
| | - Heping Cao
- Southern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, New Orleans, LA 70124 USA
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20
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Locato V, Cimini S, De Gara L. ROS and redox balance as multifaceted players of cross-tolerance: epigenetic and retrograde control of gene expression. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3373-3391. [PMID: 29722828 DOI: 10.1093/jxb/ery168] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 04/27/2018] [Indexed: 05/07/2023]
Abstract
Retrograde pathways occurring between chloroplasts, mitochondria, and the nucleus involve oxidative and antioxidative signals that, working in a synergistic or antagonistic mode, control the expression of specific patterns of genes following stress perception. Increasing evidence also underlines the relevance of mitochondrion-chloroplast-nucleus crosstalk in modulating the whole cellular redox metabolism by a controlled and integrated flux of information. Plants can maintain the acquired tolerance by a stress memory, also operating at the transgenerational level, via epigenetic and miRNA-based mechanisms controlling gene expression. Data discussed in this review strengthen the idea that ROS, redox signals, and shifts in cellular redox balance permeate the signalling network leading to cross-tolerance. The identification of specific ROS/antioxidative signatures leading a plant to different fates under stress is pivotal for identifying strategies to monitor and increase plant fitness in a changing environment. This review provides an update of the plant redox signalling network implicated in stress responses, in particular in cross-tolerance acquisition. The interplay between reactive oxygen species (ROS), ROS-derived signals, and antioxidative pathways is also discussed in terms of plant acclimation to stress in the short and long term.
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Affiliation(s)
- Vittoria Locato
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Sara Cimini
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
| | - Laura De Gara
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University, Rome, Italy
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21
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Barreto P, Yassitepe JECT, Wilson ZA, Arruda P. Mitochondrial Uncoupling Protein 1 Overexpression Increases Yield in Nicotiana tabacum under Drought Stress by Improving Source and Sink Metabolism. FRONTIERS IN PLANT SCIENCE 2017; 8:1836. [PMID: 29163573 PMCID: PMC5672497 DOI: 10.3389/fpls.2017.01836] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 10/10/2017] [Indexed: 05/18/2023]
Abstract
Mitochondrial uncoupling proteins (UCPs) sustain mitochondrial respiration independent of intracellular ATP concentration. Uncoupled respiration is particularly beneficial under stress conditions, during which both photosynthesis and respiration may be impaired. Sustaining carbon fixation during the reproductive phase is essential for plants to develop viable pollen grains and for seed setting. Here, we examined whether UCP1 overexpression (UCP1-oe) would help tobacco plants cope with drought stress during reproductive development. We observed that WT and UCP1-oe plants lost water at the same rate under moderate drought stress, but that UCP1-oe lines regained water faster upon rewatering. UCP1-oe plants maintained higher levels of respiration and photosynthesis and decreased H2O2 content in the leaves during the drought stress period. We examined whether UCP1-oe impacts reproductive tissues and seed production by monitoring the progress of flower development, focusing on the early stages of pollen formation. UCP1-oe lines induced the expression of mitochondrial genes and increased mtDNA content in reproductive tissues, which increased the consumption of carbohydrates and reduced H2O2 content and pollen disturbances. Finally, the beneficial impact of UCP1-oe on the source and sink organs resulted in an increased seed size and number under both control conditions and drought stress.
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Affiliation(s)
- Pedro Barreto
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, Campinas, Brazil
- Joint Research Center for Genomics Applied to Climate Change (UMIP GenClima), Campinas, Brazil
| | - Juliana E. C. T. Yassitepe
- Joint Research Center for Genomics Applied to Climate Change (UMIP GenClima), Campinas, Brazil
- Empresa Brasileira de Pesquisa Agropecuária, Embrapa Informática Agropecuária, Campinas, Brazil
| | - Zoe A. Wilson
- School of Biosciences, University of Nottingham, Loughborough, United Kingdom
| | - Paulo Arruda
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas, Campinas, Brazil
- Joint Research Center for Genomics Applied to Climate Change (UMIP GenClima), Campinas, Brazil
- Departamento de Genética, Evolução e Bioagentes, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, Brazil
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22
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Keech O, Gardeström P, Kleczkowski LA, Rouhier N. The redox control of photorespiration: from biochemical and physiological aspects to biotechnological considerations. PLANT, CELL & ENVIRONMENT 2017; 40:553-569. [PMID: 26791824 DOI: 10.1111/pce.12713] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 12/28/2015] [Accepted: 01/13/2016] [Indexed: 06/05/2023]
Abstract
Photorespiration is a complex and tightly regulated process occurring in photosynthetic organisms. This process can alter the cellular redox balance, notably via the production and consumption of both reducing and oxidizing equivalents. Under certain circumstances, these equivalents, as well as reactive oxygen or nitrogen species, can become prominent in subcellular compartments involved in the photorespiratory process, eventually promoting oxidative post-translational modifications of proteins. Keeping these changes under tight control should therefore be of primary importance. In order to review the current state of knowledge about the redox control of photorespiration, we primarily performed a careful description of the known and potential redox-regulated or oxidation sensitive photorespiratory proteins, and examined in more details two interesting cases: the glycerate kinase and the glycine cleavage system. When possible, the potential impact and subsequent physiological regulations associated with these changes have been discussed. In the second part, we reviewed the extent to which photorespiration contributes to cellular redox homeostasis considering, in particular, the set of peripheral enzymes associated with the canonical photorespiratory pathway. Finally, some recent biotechnological strategies to circumvent photorespiration for future growth improvements are discussed in the light of these redox regulations.
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Affiliation(s)
- Olivier Keech
- Department of Plant Physiology, UPSC, Umeå University, S-90187, Umeå, Sweden
| | - Per Gardeström
- Department of Plant Physiology, UPSC, Umeå University, S-90187, Umeå, Sweden
| | | | - Nicolas Rouhier
- INRA, UMR 1136 Interactions Arbres/Microorganismes, Centre INRA Nancy Lorraine, 54280, Champenoux, France
- Université de Lorraine, UMR 1136 Interactions Arbres/Microorganismes, Faculté des Sciences et Technologies, 54506, Vandoeuvre-lès-Nancy, France
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23
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Johnson R, Dludla PV, Muller CJF, Huisamen B, Essop MF, Louw J. The Transcription Profile Unveils the Cardioprotective Effect of Aspalathin against Lipid Toxicity in an In Vitro H9c2 Model. Molecules 2017; 22:molecules22020219. [PMID: 28146135 PMCID: PMC6155936 DOI: 10.3390/molecules22020219] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 01/25/2017] [Indexed: 01/14/2023] Open
Abstract
Aspalathin, a C-glucosyl dihydrochalcone, has previously been shown to protect cardiomyocytes against hyperglycemia-induced shifts in substrate preference and subsequent apoptosis. However, the precise gene regulatory network remains to be elucidated. To unravel the mechanism and provide insight into this supposition, the direct effect of aspalathin in an isolated cell-based system, without the influence of any variables, was tested using an H9c2 cardiomyocyte model. Cardiomyocytes were exposed to high glucose (33 mM) for 48 h before post-treatment with or without aspalathin. Thereafter, RNA was extracted and RT2 PCR Profiler Arrays were used to profile the expression of 336 genes. Results showed that, 57 genes were differentially regulated in the high glucose or high glucose and aspalathin treated groups. Search Tool for the Retrieval of Interacting Genes/Proteins (STRING) analysis revealed lipid metabolism and molecular transport as the biological processes altered after high glucose treatment, followed by inflammation and apoptosis. Aspalathin was able to modulate key regulators associated with lipid metabolism (Adipoq, Apob, CD36, Cpt1, Pparγ, Srebf1/2, Scd1 and Vldlr), insulin resistance (Igf1, Akt1, Pde3 and Map2k1), inflammation (Il3, Il6, Jak2, Lepr, Socs3, and Tnf13) and apoptosis (Bcl2 and Chuk). Collectively, our results suggest that aspalathin could reverse metabolic abnormalities by activating Adipoq while modulating the expression of Pparγ and Srebf1/2, decreasing inflammation via Il6/Jak2 pathway, which together with an observed increased expression of Bcl2 prevents myocardium apoptosis.
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Affiliation(s)
- Rabia Johnson
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
| | - Phiwayinkosi V Dludla
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
| | - Christo J F Muller
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
- Department of Biochemistry and Microbiology, University of Zululand, Kwadlangezwa 3886, South Africa.
| | - Barbara Huisamen
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Division of Medical Physiology, Faculty of Health Sciences, Stellenbosch University, Tygerberg 7505, South Africa.
| | - M Faadiel Essop
- Cardio-Metabolic Research Group (CMRG), Department of Physiological Sciences, Stellenbosch University, Stellenbosch 7599, South Africa.
| | - Johan Louw
- Biomedical Research and Innovation Platform (BRIP), Medical Research Council (MRC), Tygerberg 7505, South Africa.
- Department of Biochemistry and Microbiology, University of Zululand, Kwadlangezwa 3886, South Africa.
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24
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Lee CP, Maksaev G, Jensen GS, Murcha MW, Wilson ME, Fricker M, Hell R, Haswell ES, Millar AH, Sweetlove LJ. MSL1 is a mechanosensitive ion channel that dissipates mitochondrial membrane potential and maintains redox homeostasis in mitochondria during abiotic stress. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2016; 88:809-825. [PMID: 27505616 PMCID: PMC5195915 DOI: 10.1111/tpj.13301] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/04/2016] [Accepted: 08/05/2016] [Indexed: 05/18/2023]
Abstract
Mitochondria must maintain tight control over the electrochemical gradient across their inner membrane to allow ATP synthesis while maintaining a redox-balanced electron transport chain and avoiding excessive reactive oxygen species production. However, there is a scarcity of knowledge about the ion transporters in the inner mitochondrial membrane that contribute to control of membrane potential. We show that loss of MSL1, a member of a family of mechanosensitive ion channels related to the bacterial channel MscS, leads to increased membrane potential of Arabidopsis mitochondria under specific bioenergetic states. We demonstrate that MSL1 localises to the inner mitochondrial membrane. When expressed in Escherichia coli, MSL1 forms a stretch-activated ion channel with a slight preference for anions and provides protection against hypo-osmotic shock. In contrast, loss of MSL1 in Arabidopsis did not prevent swelling of isolated mitochondria in hypo-osmotic conditions. Instead, our data suggest that ion transport by MSL1 leads to dissipation of mitochondrial membrane potential when it becomes too high. The importance of MSL1 function was demonstrated by the observation of a higher oxidation state of the mitochondrial glutathione pool in msl1-1 mutants under moderate heat- and heavy-metal-stress. Furthermore, we show that MSL1 function is not directly implicated in mitochondrial membrane potential pulsing, but is complementary and appears to be important under similar conditions.
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Affiliation(s)
- Chun Pong Lee
- ARC Centre of Excellence in Plant Energy Biology, University of Western Australia, Bayliss Building M316, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
| | - Grigory Maksaev
- Department of Biology, Washington University in Saint Louis, One Brookings Drive, Mailcode 1137, Saint Louis, MO, 63130, USA
| | - Gregory S Jensen
- Department of Biology, Washington University in Saint Louis, One Brookings Drive, Mailcode 1137, Saint Louis, MO, 63130, USA
| | - Monika W Murcha
- ARC Centre of Excellence in Plant Energy Biology, University of Western Australia, Bayliss Building M316, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
| | - Margaret E Wilson
- Department of Biology, Washington University in Saint Louis, One Brookings Drive, Mailcode 1137, Saint Louis, MO, 63130, USA
| | - Mark Fricker
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Ruediger Hell
- Department of Plant Molecular Biology, Centre for Organismal Studies, University of Heidelberg, Im Neuenheimer Feld 360, D-69120, Heidelberg, Germany
| | - Elizabeth S Haswell
- Department of Biology, Washington University in Saint Louis, One Brookings Drive, Mailcode 1137, Saint Louis, MO, 63130, USA
| | - A Harvey Millar
- ARC Centre of Excellence in Plant Energy Biology, University of Western Australia, Bayliss Building M316, 35 Stirling Highway, Crawley, 6009, Western Australia, Australia
| | - Lee J Sweetlove
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
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25
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Chrobok D, Law SR, Brouwer B, Lindén P, Ziolkowska A, Liebsch D, Narsai R, Szal B, Moritz T, Rouhier N, Whelan J, Gardeström P, Keech O. Dissecting the Metabolic Role of Mitochondria during Developmental Leaf Senescence. PLANT PHYSIOLOGY 2016; 172:2132-2153. [PMID: 27744300 PMCID: PMC5129728 DOI: 10.1104/pp.16.01463] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/13/2016] [Indexed: 05/20/2023]
Abstract
The functions of mitochondria during leaf senescence, a type of programmed cell death aimed at the massive retrieval of nutrients from the senescing organ to the rest of the plant, remain elusive. Here, combining experimental and analytical approaches, we showed that mitochondrial integrity in Arabidopsis (Arabidopsis thaliana) is conserved until the latest stages of leaf senescence, while their number drops by 30%. Adenylate phosphorylation state assays and mitochondrial respiratory measurements indicated that the leaf energy status also is maintained during this time period. Furthermore, after establishing a curated list of genes coding for products targeted to mitochondria, we analyzed in isolation their transcript profiles, focusing on several key mitochondrial functions, such as the tricarboxylic acid cycle, mitochondrial electron transfer chain, iron-sulfur cluster biosynthesis, transporters, as well as catabolic pathways. In tandem with a metabolomic approach, our data indicated that mitochondrial metabolism was reorganized to support the selective catabolism of both amino acids and fatty acids. Such adjustments would ensure the replenishment of α-ketoglutarate and glutamate, which provide the carbon backbones for nitrogen remobilization. Glutamate, being the substrate of the strongly up-regulated cytosolic glutamine synthase, is likely to become a metabolically limiting factor in the latest stages of developmental leaf senescence. Finally, an evolutionary age analysis revealed that, while branched-chain amino acid and proline catabolism are very old mitochondrial functions particularly enriched at the latest stages of leaf senescence, auxin metabolism appears to be rather newly acquired. In summation, our work shows that, during developmental leaf senescence, mitochondria orchestrate catabolic processes by becoming increasingly central energy and metabolic hubs.
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Affiliation(s)
- Daria Chrobok
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Simon R Law
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Bastiaan Brouwer
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Pernilla Lindén
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Agnieszka Ziolkowska
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Daniela Liebsch
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Reena Narsai
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Bozena Szal
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Thomas Moritz
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Nicolas Rouhier
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - James Whelan
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Per Gardeström
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.)
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.)
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.)
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
| | - Olivier Keech
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, S-90187 Umea, Sweden (D.C., S.R.L., B.B., A.Z., D.L., P.G., O.K.);
- Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre, Swedish University of Agricultural Sciences, S-90183 Umea, Sweden (P.L., T.M.);
- Department of Animal, Plant, and Soil Science, School of Life Science, Australian Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia (R.N., J.W.);
- Institute of Experimental Plant Biology and Biotechnology, Faculty of Biology, University of Warsaw I, 02-096 Warsaw, Poland (B.S.); and
- Unité Mixte de Recherche 1136 Interactions Arbres/Microorganismes, Université de Lorraine/Institut National de la Recherche Agronomique Faculté des Sciences et Technologies, 54506 Vandoeuvre-les-Nancy, France (N.R.)
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26
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Yang K, Lu Y, Xie F, Zou H, Fan X, Li B, Li W, Zhang W, Mei L, Feng SS, Yin Y, Liu Y, Zhang H, Yin C, Zhong Y, Gao J. Cationic liposomes induce cell necrosis through lysosomal dysfunction and late-stage autophagic flux inhibition. Nanomedicine (Lond) 2016; 11:3117-3137. [PMID: 27819530 DOI: 10.2217/nnm-2016-0289] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
AIM The application of cationic liposomes (CLs) as nonviral vectors is hampered by their cellular toxicity. Thus we aim to investigate the mechanisms underlying the cellular toxicity of CLs. MATERIALS & METHODS The effect of CLs on the autophagic flux, autophagosome-lysosome fusion, lysosome membrane permeabilization and cell necrosis of liver cells was investigated. RESULTS & CONCLUSION Our results reveal a novel mechanism of CL-induced cell necrosis involving the induction of lysosome membrane permeabilization and late-stage autophagic flux inhibition that resulted in cytoplasmic release of cathepsin B, mitochondrial dysfunction and reactive oxygen species production, which are the key mediators of cell necrosis. Our study is important for revealing the cellular toxicity of CLs and designing safer gene delivery systems.
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Affiliation(s)
- Kaixuan Yang
- Department of Pharmaceutical Sciences, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China.,International Joint Cancer Institute, Second Military Medical University, 800 Xiang Yin Road, Shanghai 200433, China.,Department of Oncology, Affiliated Hospital of Guizhou Medcial University & Guizhou Cancer Hospital, Guiyang 550025, Guizhou, China
| | - Ying Lu
- Department of Pharmaceutical Sciences, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Fangyuan Xie
- Department of Pharmaceutical Sciences, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China.,Department of Pharmacy, Shanghai Eastern Hepatobiliary Surgery Hospital, 225 Changhai Road, Shanghai 200438, China
| | - Hao Zou
- Department of Pharmaceutical Sciences, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Xiaoyu Fan
- International Joint Cancer Institute, Second Military Medical University, 800 Xiang Yin Road, Shanghai 200433, China
| | - Bohua Li
- International Joint Cancer Institute, Second Military Medical University, 800 Xiang Yin Road, Shanghai 200433, China
| | - Wei Li
- International Joint Cancer Institute, Second Military Medical University, 800 Xiang Yin Road, Shanghai 200433, China
| | - Wei Zhang
- Department of Respiratory & Critical Care Medicine, Shanghai Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - Lin Mei
- Division of Life & Health Sciences, Tsinghua University Shenzhen Graduate School, Shenzhen 518055, China
| | - Si-Shen Feng
- International Joint Cancer Institute, Second Military Medical University, 800 Xiang Yin Road, Shanghai 200433, China.,Department of Chemical & Biomolecular Engineering, National University of Singapore, Block E5, 02-11, 4 Engineering Drive 4, Singapore 117576, Singapore
| | - You Yin
- Department of Neurology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Yan Liu
- Department of Pharmacy, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - Hai Zhang
- Department of Pharmacy, Shanghai Eastern Hepatobiliary Surgery Hospital, 225 Changhai Road, Shanghai 200438, China
| | - Chuan Yin
- Department of Gastroenterology, Changzheng Hospital, Second Military Medical University, Shanghai 200003, China
| | - Yanqiang Zhong
- Department of Pharmaceutical Sciences, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China
| | - Jie Gao
- Department of Pharmaceutical Sciences, School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, China.,International Joint Cancer Institute, Second Military Medical University, 800 Xiang Yin Road, Shanghai 200433, China.,Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, MI 48109, USA
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27
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Huang S, Van Aken O, Schwarzländer M, Belt K, Millar AH. The Roles of Mitochondrial Reactive Oxygen Species in Cellular Signaling and Stress Response in Plants. PLANT PHYSIOLOGY 2016; 171:1551-9. [PMID: 27021189 PMCID: PMC4936549 DOI: 10.1104/pp.16.00166] [Citation(s) in RCA: 242] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 03/21/2016] [Indexed: 05/18/2023]
Abstract
Mitochondria produce ATP via respiratory oxidation of organic acids and transfer of electrons to O2 via the mitochondrial electron transport chain. This process produces reactive oxygen species (ROS) at various rates that can impact respiratory and cellular function, affecting a variety of signaling processes in the cell. Roles in redox signaling, retrograde signaling, plant hormone action, programmed cell death, and defense against pathogens have been attributed to ROS generated in plant mitochondria (mtROS). The shortcomings of the black box-idea of mtROS are discussed in the context of mechanistic considerations and the measurement of mtROS The overall aim of this update is to better define our current understanding of mtROS and appraise their potential influence on cellular function in plants. Furthermore, directions for future research are provided, along with suggestions to increase reliability of mtROS measurements.
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Affiliation(s)
- Shaobai Huang
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia (S.H., O.V.A., K.B., A.H.M.); andPlant Energy Biology Lab, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, 53113 Bonn, Germany (M.S.)
| | - Olivier Van Aken
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia (S.H., O.V.A., K.B., A.H.M.); andPlant Energy Biology Lab, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, 53113 Bonn, Germany (M.S.)
| | - Markus Schwarzländer
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia (S.H., O.V.A., K.B., A.H.M.); andPlant Energy Biology Lab, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, 53113 Bonn, Germany (M.S.)
| | - Katharina Belt
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia (S.H., O.V.A., K.B., A.H.M.); andPlant Energy Biology Lab, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, 53113 Bonn, Germany (M.S.)
| | - A Harvey Millar
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia (S.H., O.V.A., K.B., A.H.M.); andPlant Energy Biology Lab, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, 53113 Bonn, Germany (M.S.)
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Wagner S, De Bortoli S, Schwarzländer M, Szabò I. Regulation of mitochondrial calcium in plants versus animals. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:3809-29. [PMID: 27001920 DOI: 10.1093/jxb/erw100] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Ca(2+) acts as an important cellular second messenger in eukaryotes. In both plants and animals, a wide variety of environmental and developmental stimuli trigger Ca(2+) transients of a specific signature that can modulate gene expression and metabolism. In animals, mitochondrial energy metabolism has long been considered a hotspot of Ca(2+) regulation, with a range of pathophysiology linked to altered Ca(2+) control. Recently, several molecular players involved in mitochondrial Ca(2+) signalling have been identified, including those of the mitochondrial Ca(2+) uniporter. Despite strong evidence for sophisticated Ca(2+) regulation in plant mitochondria, the picture has remained much less clear. This is currently changing aided by live imaging and genetic approaches which allow dissection of subcellular Ca(2+) dynamics and identification of the proteins involved. We provide an update on our current understanding in the regulation of mitochondrial Ca(2+) and signalling by comparing work in plants and animals. The significance of mitochondrial Ca(2+) control is discussed in the light of the specific metabolic and energetic needs of plant and animal cells.
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Affiliation(s)
- Stephan Wagner
- Plant Energy Biology Lab, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, D-53113 Bonn, Germany
| | - Sara De Bortoli
- Department of Biology and CNR Institute of Neurosciences, University of Padova, Viale G. Colombo 3, 35121 Padova, Italy
| | - Markus Schwarzländer
- Plant Energy Biology Lab, Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, D-53113 Bonn, Germany
| | - Ildikò Szabò
- Department of Biology and CNR Institute of Neurosciences, University of Padova, Viale G. Colombo 3, 35121 Padova, Italy
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Sun AZ, Guo FQ. Chloroplast Retrograde Regulation of Heat Stress Responses in Plants. FRONTIERS IN PLANT SCIENCE 2016; 7:398. [PMID: 27066042 PMCID: PMC4814484 DOI: 10.3389/fpls.2016.00398] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/14/2016] [Indexed: 05/19/2023]
Abstract
It is well known that intracellular signaling from chloroplast to nucleus plays a vital role in stress responses to survive environmental perturbations. The chloroplasts were proposed as sensors to heat stress since components of the photosynthetic apparatus housed in the chloroplast are the major targets of thermal damage in plants. Thus, communicating subcellular perturbations to the nucleus is critical during exposure to extreme environmental conditions such as heat stress. By coordinating expression of stress specific nuclear genes essential for adaptive responses to hostile environment, plants optimize different cell functions and activate acclimation responses through retrograde signaling pathways. The efficient communication between plastids and the nucleus is highly required for such diverse metabolic and biosynthetic functions during adaptation processes to environmental stresses. In recent years, several putative retrograde signals released from plastids that regulate nuclear genes have been identified and signaling pathways have been proposed. In this review, we provide an update on retrograde signals derived from tetrapyrroles, carotenoids, reactive oxygen species (ROS) and organellar gene expression (OGE) in the context of heat stress responses and address their roles in retrograde regulation of heat-responsive gene expression, systemic acquired acclimation, and cellular coordination in plants.
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Affiliation(s)
| | - Fang-Qing Guo
- The National Key Laboratory of Plant Molecular Genetics, National Center of Plant Gene Research (Shanghai) and CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology & Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghai, China
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30
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Sun AZ, Guo FQ. Chloroplast Retrograde Regulation of Heat Stress Responses in Plants. FRONTIERS IN PLANT SCIENCE 2016; 7:398. [PMID: 27066042 DOI: 10.3389/fpls.2016.00398/full] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/14/2016] [Indexed: 05/28/2023]
Abstract
It is well known that intracellular signaling from chloroplast to nucleus plays a vital role in stress responses to survive environmental perturbations. The chloroplasts were proposed as sensors to heat stress since components of the photosynthetic apparatus housed in the chloroplast are the major targets of thermal damage in plants. Thus, communicating subcellular perturbations to the nucleus is critical during exposure to extreme environmental conditions such as heat stress. By coordinating expression of stress specific nuclear genes essential for adaptive responses to hostile environment, plants optimize different cell functions and activate acclimation responses through retrograde signaling pathways. The efficient communication between plastids and the nucleus is highly required for such diverse metabolic and biosynthetic functions during adaptation processes to environmental stresses. In recent years, several putative retrograde signals released from plastids that regulate nuclear genes have been identified and signaling pathways have been proposed. In this review, we provide an update on retrograde signals derived from tetrapyrroles, carotenoids, reactive oxygen species (ROS) and organellar gene expression (OGE) in the context of heat stress responses and address their roles in retrograde regulation of heat-responsive gene expression, systemic acquired acclimation, and cellular coordination in plants.
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Affiliation(s)
- Ai-Zhen Sun
- The National Key Laboratory of Plant Molecular Genetics, National Center of Plant Gene Research (Shanghai) and CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology & Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences Shanghai, China
| | - Fang-Qing Guo
- The National Key Laboratory of Plant Molecular Genetics, National Center of Plant Gene Research (Shanghai) and CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology & Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences Shanghai, China
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Arnholdt-Schmitt B, Ragonezi C, Cardoso H. Do Mitochondria Play a Central Role in Stress-Induced Somatic Embryogenesis? Methods Mol Biol 2016; 1359:87-100. [PMID: 26619859 DOI: 10.1007/978-1-4939-3061-6_4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This review highlights a four-step rational for the hypothesis that mitochondria play an upstream central role for stress-induced somatic embryogenesis (SE): (1) Initiation of SE is linked to programmed cell death (PCD) (2) Mitochondria are crucially connected to cell death (3) SE is challenged by stress per se (4) Mitochondria are centrally linked to plant stress response and its management. Additionally the review provides a rough perspective for the use of mitochondrial-derived functional marker (FM) candidates to improve SE efficiency. It is proposed to apply SE systems as phenotyping tool for identifying superior genotypes with high general plasticity under severe plant stress conditions.
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Affiliation(s)
- Birgit Arnholdt-Schmitt
- EU Marie Curie Chair, ICAAM, IIFA, Universidade de Évora, Núcleo da Mitra, Ap. 94, Évora, 7002-554, Portugal.
| | - Carla Ragonezi
- EU Marie Curie Chair, ICAAM, IIFA, Universidade de Évora, Núcleo da Mitra, Ap. 94, Évora, 7002-554, Portugal
| | - Hélia Cardoso
- EU Marie Curie Chair, ICAAM, IIFA, Universidade de Évora, Núcleo da Mitra, Ap. 94, Évora, 7002-554, Portugal
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Barreto P, Okura V, Pena IA, Maia R, Maia IG, Arruda P. Overexpression of mitochondrial uncoupling protein 1 (UCP1) induces a hypoxic response in Nicotiana tabacum leaves. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:301-13. [PMID: 26494730 PMCID: PMC4682437 DOI: 10.1093/jxb/erv460] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Mitochondrial uncoupling protein 1 (UCP1) decreases reactive oxygen species production under stress conditions by uncoupling the electrochemical gradient from ATP synthesis. This study combined transcriptome profiling with experimentally induced hypoxia to mechanistically dissect the impact of Arabidopsis thaliana UCP1 (AtUCP1) overexpression in tobacco. Transcriptomic analysis of AtUCP1-overexpressing (P07) and wild-type (WT) plants was carried out using RNA sequencing. Metabolite and carbohydrate profiling of hypoxia-treated plants was performed using (1)H-nuclear magnetic resonance spectroscopy and high-performance anion-exchange chromatography with pulsed amperometric detection. The transcriptome of P07 plants revealed a broad induction of stress-responsive genes that were not strictly related to the mitochondrial antioxidant machinery, suggesting that overexpression of AtUCP1 imposes a strong stress response within the cell. In addition, transcripts that mapped into carbon fixation and energy expenditure pathways were broadly altered. It was found that metabolite markers of hypoxic adaptation, such as alanine and tricarboxylic acid intermediates, accumulated in P07 plants under control conditions at similar rates to WT plants under hypoxia. These findings indicate that constitutive overexpression of AtUCP1 induces a hypoxic response. The metabolites that accumulated in P07 plants are believed to be important in signalling for an improvement in carbon assimilation and induction of a hypoxic response. Under these conditions, mitochondrial ATP production is less necessary and fermentative glycolysis becomes critical to meet cell energy demands. In this scenario, the more flexible energy metabolism along with an intrinsically activated hypoxic response make these plants better adapted to face several biotic and abiotic stresses.
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Affiliation(s)
- Pedro Barreto
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas (UNICAMP), 13083-875 Campinas, SP, Brazil
| | - Vagner Okura
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas (UNICAMP), 13083-875 Campinas, SP, Brazil
| | - Izabella A Pena
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas (UNICAMP), 13083-875 Campinas, SP, Brazil
| | - Renato Maia
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas (UNICAMP), 13083-875 Campinas, SP, Brazil
| | - Ivan G Maia
- Departamento de Genética, Instituto de Biociências, UNESP, 18618-970 Botucatu, SP, Brazil
| | - Paulo Arruda
- Centro de Biologia Molecular e Engenharia Genética, Universidade Estadual de Campinas (UNICAMP), 13083-875 Campinas, SP, Brazil Departamento de Genética e Evolução, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), 13083-875 Campinas, SP, Brazil
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He Y, Fu J, Yu C, Wang X, Jiang Q, Hong J, Lu K, Xue G, Yan C, James A, Xu L, Chen J, Jiang D. Increasing cyclic electron flow is related to Na+ sequestration into vacuoles for salt tolerance in soybean. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:6877-89. [PMID: 26276865 PMCID: PMC4623694 DOI: 10.1093/jxb/erv392] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
In land plants, the NAD(P)H dehydrogenase (NDH) complex reduces plastoquinones and drives cyclic electron flow (CEF) around PSI. It also produces extra ATP for photosynthesis and improves plant fitness under conditions of abiotic environmental stress. To elucidate the role of CEF in salt tolerance of the photosynthetic apparatus, Na(+) concentration, chlorophyll fluorescence, and expression of NDH B and H subunits, as well as of genes related to cellular and vacuolar Na(+) transport, were monitored. The salt-tolerant Glycine max (soybean) variety S111-9 exhibited much higher CEF activity and ATP accumulation in light than did the salt-sensitive variety Melrose, but similar leaf Na(+) concentrations under salt stress. In S111-9 plants, ndhB and ndhH were highly up-regulated under salt stress and their corresponding proteins were maintained at high levels or increased significantly. Under salt stress, S111-9 plants accumulated Na(+) in the vacuole, but Melrose plants accumulated Na(+) in the chloroplast. Compared with Melrose, S111-9 plants also showed higher expression of some genes associated with Na(+) transport into the vacuole and/or cell, such as genes encoding components of the CBL10 (calcineurin B-like protein 10)-CIPK24 (CBL-interacting protein kinase 24)-NHX (Na(+)/H(+) antiporter) and CBL4 (calcineurin B-like protein 4)-CIPK24-SOS1 (salt overly sensitive 1) complexes. Based on the findings, it is proposed that enhanced NDH-dependent CEF supplies extra ATP used to sequester Na(+) in the vacuole. This reveals an important mechanism for salt tolerance in soybean and provides new insights into plant resistance to salt stress.
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Affiliation(s)
- Yi He
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK
| | - Junliang Fu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Chenliang Yu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaoman Wang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Qinsu Jiang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jian Hong
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Kaixing Lu
- Laboratory of Plant Molecular Biology, Ningbo University, Ningbo 315211, China
| | - Gangping Xue
- CSIRO Agriculture Flagship, Queensland 4067, Australia
| | - Chengqi Yan
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, 310021 Hangzhou, China
| | - Andrew James
- CSIRO Agriculture Flagship, Queensland 4067, Australia
| | - Ligen Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jianping Chen
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, 310021 Hangzhou, China
| | - Dean Jiang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
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Pu X, Lv X, Tan T, Fu F, Qin G, Lin H. Roles of mitochondrial energy dissipation systems in plant development and acclimation to stress. ANNALS OF BOTANY 2015; 116:583-600. [PMID: 25987710 PMCID: PMC4577992 DOI: 10.1093/aob/mcv063] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/16/2015] [Accepted: 03/27/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND Plants are sessile organisms that have the ability to integrate external cues into metabolic and developmental signals. The cues initiate specific signal cascades that can enhance the tolerance of plants to stress, and these mechanisms are crucial to the survival and fitness of plants. The adaption of plants to stresses is a complex process that involves decoding stress inputs as energy-deficiency signals. The process functions through vast metabolic and/or transcriptional reprogramming to re-establish the cellular energy balance. Members of the mitochondrial energy dissipation pathway (MEDP), alternative oxidases (AOXs) and uncoupling proteins (UCPs), act as energy mediators and might play crucial roles in the adaption of plants to stresses. However, their roles in plant growth and development have been relatively less explored. SCOPE This review summarizes current knowledge about the role of members of the MEDP in plant development as well as recent advances in identifying molecular components that regulate the expression of AOXs and UCPs. Highlighted in particular is a comparative analysis of the expression, regulation and stress responses between AOXs and UCPs when plants are exposed to stresses, and a possible signal cross-talk that orchestrates the MEDP, reactive oxygen species (ROS), calcium signalling and hormone signalling. CONCLUSIONS The MEDP might act as a cellular energy/metabolic mediator that integrates ROS signalling, energy signalling and hormone signalling with plant development and stress accumulation. However, the regulation of MEDP members is complex and occurs at transcriptional, translational, post-translational and metabolic levels. How this regulation is linked to actual fluxes through the AOX/UCP in vivo remains elusive.
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Affiliation(s)
- Xiaojun Pu
- Ministry of Education Key Laboratory for Bio-Resource & Eco-Environment and Plant Physiology Laboratory, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
| | - Xin Lv
- Ministry of Education Key Laboratory for Bio-Resource & Eco-Environment and Plant Physiology Laboratory, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
| | - Tinghong Tan
- Ministry of Education Key Laboratory for Bio-Resource & Eco-Environment and Plant Physiology Laboratory, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
| | - Faqiong Fu
- Ministry of Education Key Laboratory for Bio-Resource & Eco-Environment and Plant Physiology Laboratory, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
| | - Gongwei Qin
- Ministry of Education Key Laboratory for Bio-Resource & Eco-Environment and Plant Physiology Laboratory, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
| | - Honghui Lin
- Ministry of Education Key Laboratory for Bio-Resource & Eco-Environment and Plant Physiology Laboratory, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610064, China
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Laitz AVN, Acencio ML, Budzinski IGF, Labate MTV, Lemke N, Ribolla PEM, Maia IG. Transcriptome response signatures associated with the overexpression of a mitochondrial uncoupling protein (AtUCP1) in tobacco. PLoS One 2015; 10:e0130744. [PMID: 26106890 PMCID: PMC4479485 DOI: 10.1371/journal.pone.0130744] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 05/23/2015] [Indexed: 11/30/2022] Open
Abstract
Mitochondrial inner membrane uncoupling proteins (UCP) dissipate the proton electrochemical gradient established by the respiratory chain, thus affecting the yield of ATP synthesis. UCP overexpression in plants has been correlated with oxidative stress tolerance, improved photosynthetic efficiency and increased mitochondrial biogenesis. This study reports the main transcriptomic responses associated with the overexpression of an UCP (AtUCP1) in tobacco seedlings. Compared to wild-type (WT), AtUCP1 transgenic seedlings showed unaltered ATP levels and higher accumulation of serine. By using RNA-sequencing, a total of 816 differentially expressed genes between the investigated overexpressor lines and the untransformed WT control were identified. Among them, 239 were up-regulated and 577 were down-regulated. As a general response to AtUCP1 overexpression, noticeable changes in the expression of genes involved in energy metabolism and redox homeostasis were detected. A substantial set of differentially expressed genes code for products targeted to the chloroplast and mainly involved in photosynthesis. The overall results demonstrate that the alterations in mitochondrial function provoked by AtUCP1 overexpression require important transcriptomic adjustments to maintain cell homeostasis. Moreover, the occurrence of an important cross-talk between chloroplast and mitochondria, which culminates in the transcriptional regulation of several genes involved in different pathways, was evidenced.
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Affiliation(s)
| | - Marcio Luis Acencio
- UNESP, Instituto de Biociências, Departamento de Física e Biofísica, Botucatu, SP, Brazil
| | - Ilara G. F. Budzinski
- USP, Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, SP, Brazil
| | - Mônica T. V. Labate
- USP, Departamento de Genética, Escola Superior de Agricultura Luiz de Queiroz, Piracicaba, SP, Brazil
| | - Ney Lemke
- UNESP, Instituto de Biociências, Departamento de Física e Biofísica, Botucatu, SP, Brazil
| | | | - Ivan G. Maia
- UNESP, Instituto de Biociências, Departamento de Genética, Botucatu, SP, Brazil
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Rurek M, Woyda-Ploszczyca AM, Jarmuszkiewicz W. Biogenesis of mitochondria in cauliflower (Brassica oleracea var. botrytis) curds subjected to temperature stress and recovery involves regulation of the complexome, respiratory chain activity, organellar translation and ultrastructure. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:399-417. [PMID: 25617518 DOI: 10.1016/j.bbabio.2015.01.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 12/05/2014] [Accepted: 01/16/2015] [Indexed: 12/30/2022]
Abstract
The biogenesis of the cauliflower curd mitochondrial proteome was investigated under cold, heat and the recovery. For the first time, two dimensional fluorescence difference gel electrophoresis was used to study the plant mitochondrial complexome in heat and heat recovery. Particularly, changes in the complex I and complex III subunits and import proteins, and the partial disintegration of matrix complexes were observed. The presence of unassembled subunits of ATP synthase was accompanied by impairment in mitochondrial translation of its subunit. In cold and heat, the transcription profiles of mitochondrial genes were uncorrelated. The in-gel activities of respiratory complexes were particularly affected after stress recovery. Despite a general stability of respiratory chain complexes in heat, functional studies showed that their activity and the ATP synthesis yield were affected. Contrary to cold stress, heat stress resulted in a reduced efficiency of oxidative phosphorylation likely due to changes in alternative oxidase (AOX) activity. Stress and stress recovery differently modulated the protein level and activity of AOX. Heat stress induced an increase in AOX activity and protein level, and AOX1a and AOX1d transcript level, while heat recovery reversed the AOX protein and activity changes. Conversely, cold stress led to a decrease in AOX activity (and protein level), which was reversed after cold recovery. Thus, cauliflower AOX is only induced by heat stress. In heat, contrary to the AOX activity, the activity of rotenone-insensitive internal NADH dehydrogenase was diminished. The relevance of various steps of plant mitochondrial biogenesis to temperature stress response and recovery is discussed.
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Affiliation(s)
- Michal Rurek
- Department of Cellular and Molecular Biology, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614 Poznań, Poland.
| | - Andrzej M Woyda-Ploszczyca
- Department of Bioenergetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614 Poznań, Poland
| | - Wieslawa Jarmuszkiewicz
- Department of Bioenergetics, Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska 89, 61-614 Poznań, Poland
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