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Zuo D, Zhou Z, Wang H, Zhang T, Zang J, Yin F, Sun W, Chen J, Duan L, Xu J, Wang Z, Wang C, Lin B, Fu Z, Liao Y, Li S, Sun M, Hua Y, Zheng L, Cai Z. Alternol, a natural compound, exerts an anti-tumour effect on osteosarcoma by modulating of STAT3 and ROS/MAPK signalling pathways. J Cell Mol Med 2016; 21:208-221. [PMID: 27624867 PMCID: PMC5264147 DOI: 10.1111/jcmm.12957] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 07/17/2016] [Indexed: 12/17/2022] Open
Abstract
Osteosarcoma (OS) is the most frequent primary malignant bone tumour. Alternol, a novel compound purified from microbial fermentation products exerts anti-tumour effects across several cancer types. The effect of alternol on human OS remains to be elucidated. We first evaluated the anti-tumour effect of alternol in several human OS cell lines in vitro and investigated its underlying mechanism. Alternol inhibited OS cell proliferation, migration and induced caspase-dependent apoptosis, G2/M cell cycle arrest in a dose and time-dependent manner. Moreover, alternol treatment inhibited signal transducer and activator of transcription-3 (STAT3) phosphorylation in 143B and MG63 human OS cells, as evaluated using a STAT3-dependent dual luciferase reporter system. Exposure to alternol resulted in excessive reactive oxygen species (ROS) generation and Jun amino-terminal kinases (JNK), extracellular signal-regulated kinases (ERK1/2) and p38 activation. Furthermore, alternol-induced cell death was significantly restored in the presence of the ROS scavenger, N-acetyl-l-cysteine (NAC) or a caspase inhibitor Z-VAD-FMK. NAC also prevented G2/M phase arrest and phosphorylation of mitogen-activated protein kinases (MAPK), but did not reverse STAT3 inactivation. Finally, alternol suppressed tumour growth in vivo in the nude mouse OS tibia orthotopic model. Immunohistochemistry revealed that alternol treatment resulted in down-regulation of phosph-STAT3 Tyr705 and up-regulation of cleaved caspase-3 and phosph-SAPK (Stress-activated protein kinases)/JNK expression. Taken together, our results reveal that alternol suppresses cell proliferation, migration and induces apoptosis, cell cycle arrest by modulating of ROS-dependent MAPK and STAT3 signalling pathways in human OS cells. Therefore, alternol is a promising candidate for developing anti-tumour drugs target OS.
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Affiliation(s)
- Dongqing Zuo
- Department of Orthopedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China.,Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zifei Zhou
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China.,Department of Orthopaedics, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hongsheng Wang
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China.,Department of Orthopaedics, Yangpu Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Tao Zhang
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jie Zang
- Musculoskeletal Tumor Center, People's Hospital, Peking University, Beijing, China
| | - Fei Yin
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Wei Sun
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jiepeng Chen
- Strand Biotechnology Institute of Research, Shantou, China
| | - Lili Duan
- Strand Biotechnology Institute of Research, Shantou, China
| | - Jing Xu
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zhuoying Wang
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Chongren Wang
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Binhui Lin
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Zeze Fu
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yuxin Liao
- Department of Orthopedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Suoyuan Li
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Mengxiong Sun
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yingqi Hua
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Longpo Zheng
- Department of Orthopedics, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Zhengdong Cai
- Department of Orthopaedics, Shanghai First People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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102
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A P-Loop NTPase Regulates Quiescent Center Cell Division and Distal Stem Cell Identity through the Regulation of ROS Homeostasis in Arabidopsis Root. PLoS Genet 2016; 12:e1006175. [PMID: 27583367 PMCID: PMC5008728 DOI: 10.1371/journal.pgen.1006175] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 06/15/2016] [Indexed: 01/03/2023] Open
Abstract
Reactive oxygen species (ROS) are recognized as important regulators of cell division and differentiation. The Arabidopsis thaliana P-loop NTPase encoded by APP1 affects root stem cell niche identity through its control of local ROS homeostasis. The disruption of APP1 is accompanied by a reduction in ROS level, a rise in the rate of cell division in the quiescent center (QC) and the promotion of root distal stem cell (DSC) differentiation. Both the higher level of ROS induced in the app1 mutant by exposure to methyl viologen (MV), and treatment with hydrogen peroxide (H2O2) rescued the mutant phenotype, implying that both the increased rate of cell division in the QC and the enhancement in root DSC differentiation can be attributed to a low level of ROS. APP1 is expressed in the root apical meristem cell mitochondria, and its product is associated with ATP hydrolase activity. The key transcription factors, which are defining root distal stem niche, such as SCARECROW (SCR) and SHORT ROOT (SHR) are both significantly down-regulated at both the transcriptional and protein level in the app1 mutant, indicating that SHR and SCR are important downstream targets of APP1-regulated ROS signaling to control the identity of root QC and DSCs. Reactive oxygen species (ROS) are recognized as important regulators of cell division and differentiation. In this study, we characterized an Arabidopsis thaliana P-loop NTPase encoded by APP1 regulates root stem cell niche identity through its control of local ROS homeostasis. The app1 mutant shows a reduction in ROS level, a rise in the rate of cell division in the quiescent center (QC) and the promotion of root distal stem cell (DSC) differentiation. The increased rate of cell division in the QC and the enhancement in root DSC differentiation in app1 can be attributed to a low level of ROS since both the exposure to methyl viologen (MV), and treatment with hydrogen peroxide (H2O2) rescued the mutant phenotype. APP1 is expressed in the root apical meristem cell mitochondria, and its product is associated with ATP hydrolase activity. The key transcription factors such as SCARECROW (SCR) and SHORT ROOT (SHR), which are defining root distal stem niche, are both greatly down-regulated at both the transcriptional and protein level in app1, indicating that SHR and SCR are important downstream targets of APP1-regulated ROS signaling to control the identity of root QC and DSCs.
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103
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Welchen E, Gonzalez DH. Cytochrome c, a hub linking energy, redox, stress and signaling pathways in mitochondria and other cell compartments. PHYSIOLOGIA PLANTARUM 2016; 157:310-321. [PMID: 27080474 DOI: 10.1111/ppl.12449] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/04/2016] [Accepted: 02/26/2016] [Indexed: 06/05/2023]
Abstract
Cytochrome c (CYTc) is a soluble redox-active heme protein that transfers electrons from complex III to complex IV in the cyanide-sensitive mitochondrial respiratory pathway. CYTc biogenesis is a complex process that requires multiple steps until the mature active protein is obtained. CYTc levels and activity are finely regulated, revealing the importance of this protein not only as electron carrier but also in many other processes. In this article, we describe the role of CYTc in mitochondrial respiration, from its canonical role as electron carrier for ATP production to its involvement in protein import and the stabilization of respiratory complexes and supercomplexes. In plants, CYTc is connected to the synthesis of the antioxidant ascorbate and the detoxification of toxic compounds. Finally, CYTc is also a multi-functional signaling molecule that influences the balance between life and death, acting in energy provision for cellular functions or triggering programmed cell death. The confluence of several metabolic routes into a single protein that links redox reactions with energy producing pathways seems logical from the point of view of cellular economy, control and organization.
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Affiliation(s)
- Elina Welchen
- Instituto de Agrobiotecnología del Litoral (CONICET-UNL), Cátedra de Biología Celular y Molecular, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, 3000, Argentina
| | - Daniel H Gonzalez
- Instituto de Agrobiotecnología del Litoral (CONICET-UNL), Cátedra de Biología Celular y Molecular, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Santa Fe, 3000, Argentina
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104
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Berkowitz O, De Clercq I, Van Breusegem F, Whelan J. Interaction between hormonal and mitochondrial signalling during growth, development and in plant defence responses. PLANT, CELL & ENVIRONMENT 2016; 39:1127-39. [PMID: 26763171 DOI: 10.1111/pce.12712] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 12/22/2015] [Accepted: 12/30/2015] [Indexed: 05/23/2023]
Abstract
Mitochondria play a central role in plant metabolism as they are a major source of ATP through synthesis by the oxidative phosphorylation pathway and harbour key metabolic reactions such as the TCA cycle. The energy and building blocks produced by mitochondria are essential to drive plant growth and development as well as to provide fuel for responses to abiotic and biotic stresses. The majority of mitochondrial proteins are encoded in the nuclear genome and have to be imported into the organelle. For the regulation of the corresponding genes intricate signalling pathways exist to adjust their expression. Signals directly regulate nuclear gene expression (anterograde signalling) to adjust the protein composition of the mitochondria to the needs of the cell. In parallel, mitochondria communicate back their functional status to the nucleus (retrograde signalling) to prompt transcriptional regulation of responsive genes via largely unknown signalling mechanisms. Plant hormones are the major signalling components regulating all layers of plant development and cellular functions. Increasing evidence is now becoming available that plant hormones are also part of signalling networks controlling mitochondrial function and their biogenesis. This review summarizes recent advances in understanding the interaction of mitochondrial and hormonal signalling pathways.
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Affiliation(s)
- Oliver Berkowitz
- Department of Animal, Plant and Soil Sciences, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Inge De Clercq
- Department of Animal, Plant and Soil Sciences, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
- Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, B-9052, Gent, Belgium
| | - Frank Van Breusegem
- Department of Plant Systems Biology, VIB, Technologiepark 927, B-9052, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, B-9052, Gent, Belgium
| | - James Whelan
- Department of Animal, Plant and Soil Sciences, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
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105
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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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106
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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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107
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Van Durme M, Nowack MK. Mechanisms of developmentally controlled cell death in plants. CURRENT OPINION IN PLANT BIOLOGY 2016; 29:29-37. [PMID: 26658336 DOI: 10.1016/j.pbi.2015.10.013] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/26/2015] [Accepted: 10/28/2015] [Indexed: 05/22/2023]
Abstract
During plant development various forms of programmed cell death (PCD) are implemented by a number of cell types as inherent part of their differentiation programmes. Differentiation-induced developmental PCD is gradually prepared in concert with the other cell differentiation processes. As precocious or delayed PCD can have detrimental consequences for plant development, the actual execution of PCD has to be tightly controlled. Once triggered, PCD is irrevocably and rapidly executed accompanied by the breakdown of cellular compartments. In most developmental PCD forms, cell death is followed by cell corpse clearance. Devoid of phagocytic mechanisms, dying plant cells have to prepare their own demise in a cell-autonomous fashion before their deaths, ensuring the completion of cell clearance post mortem. Depending on the cell type, cell clearance can be complete or rather selective, and persistent corpses of particular cells accomplish vital functions in the plant body. The present review attempts to give an update on the molecular mechanisms that coordinate differentiation-induced PCD as vital part of plant development.
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Affiliation(s)
- Matthias Van Durme
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium
| | - Moritz K Nowack
- Department of Plant Systems Biology, VIB, B-9052 Ghent, Belgium; Department of Plant Biotechnology and Bioinformatics, Ghent University, B-9052 Ghent, Belgium.
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108
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Launay A, Patrit O, Wénès E, Fagard M. DspA/E Contributes to Apoplastic Accumulation of ROS in Non-host A. thaliana. FRONTIERS IN PLANT SCIENCE 2016; 7:545. [PMID: 27200021 PMCID: PMC4845087 DOI: 10.3389/fpls.2016.00545] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 04/07/2016] [Indexed: 05/20/2023]
Abstract
The bacterium Erwinia amylovora is responsible for the fire blight disease of Maleae, which provokes necrotic symptoms on aerial parts. The pathogenicity of this bacterium in hosts relies on its type three-secretion system (T3SS), a molecular syringe that allows the bacterium to inject effectors into the plant cell. E. amylovora-triggered disease in host plants is associated with the T3SS-dependent production of reactive oxygen species (ROS), although ROS are generally associated with resistance in other pathosystems. We showed previously that E. amylovora can multiply transiently in the non-host plant Arabidopsis thaliana and that a T3SS-dependent production of intracellular ROS occurs during this interaction. In the present work we characterize the localization and source of hydrogen peroxide accumulation following E. amylovora infection. Transmission electron microscope (TEM) analysis of infected tissues showed that hydrogen peroxide accumulation occurs in the cytosol, plastids, peroxisomes, and mitochondria as well as in the apoplast. Furthermore, TEM analysis showed that an E. amylovora dspA/E-deficient strain does not induce hydrogen peroxide accumulation in the apoplast. Consistently, a transgenic line expressing DspA/E accumulated ROS in the apoplast. The NADPH oxidase-deficient rbohD mutant showed a very strong reduction in hydrogen peroxide accumulation in response to E. amylovora inoculation. However, we did not find an increase in bacterial titers of E. amylovora in the rbohD mutant and the rbohD mutation did not suppress the toxicity of DspA/E when introgressed into a DspA/E-expressing transgenic line. Co-inoculation of E. amylovora with cycloheximide (CHX), which we found previously to suppress callose deposition and allow strong multiplication of E. amylovora in A. thaliana leaves, led to a strong reduction of apoplastic ROS accumulation but did not affect intracellular ROS. Our data strongly suggest that apoplastic ROS accumulation is one layer of the non-host defense response triggered by the type three effector (T3E) DspA/E, together with callose deposition.
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Affiliation(s)
- Alban Launay
- CNRS 3559, Institut Jean-Pierre Bourgin, INRA, AgroParisTech, ERL, Université Paris-SaclayVersailles, France
- Université Paris-Sud–Université Paris-SaclayOrsay, France
| | | | - Estelle Wénès
- CNRS 3559, Institut Jean-Pierre Bourgin, INRA, AgroParisTech, ERL, Université Paris-SaclayVersailles, France
| | - Mathilde Fagard
- CNRS 3559, Institut Jean-Pierre Bourgin, INRA, AgroParisTech, ERL, Université Paris-SaclayVersailles, France
- *Correspondence: Mathilde Fagard,
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109
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Singh R, Singh S, Parihar P, Mishra RK, Tripathi DK, Singh VP, Chauhan DK, Prasad SM. Reactive Oxygen Species (ROS): Beneficial Companions of Plants' Developmental Processes. FRONTIERS IN PLANT SCIENCE 2016; 7:1299. [PMID: 27729914 PMCID: PMC5037240 DOI: 10.3389/fpls.2016.01299] [Citation(s) in RCA: 159] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 08/15/2016] [Indexed: 05/20/2023]
Abstract
Reactive oxygen species (ROS) are generated inevitably in the redox reactions of plants, including respiration and photosynthesis. In earlier studies, ROS were considered as toxic by-products of aerobic pathways of the metabolism. But in recent years, concept about ROS has changed because they also participate in developmental processes of plants by acting as signaling molecules. In plants, ROS regulate many developmental processes such as cell proliferation and differentiation, programmed cell death, seed germination, gravitropism, root hair growth and pollen tube development, senescence, etc. Despite much progress, a comprehensive update of advances in the understanding of the mechanisms evoked by ROS that mediate in cell proliferation and development are fragmentry and the matter of ROS perception and the signaling cascade remains open. Therefore, keeping in view the above facts, an attempt has been made in this article to summarize the recent findings regarding updates made in the regulatory action of ROS at various plant developmental stages, which are still not well-known.
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Affiliation(s)
- Rachana Singh
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of AllahabadAllahabad, India
| | - Samiksha Singh
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of AllahabadAllahabad, India
| | - Parul Parihar
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of AllahabadAllahabad, India
| | - Rohit K. Mishra
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of AllahabadAllahabad, India
| | - Durgesh K. Tripathi
- DD Pant Interdisciplinary Research Laboratory, Department of Botany, University of AllahabadAllahabad, India
| | - Vijay P. Singh
- Government Ramanuj Pratap Singhdev Post Graduate CollegeBaikunthpur, India
- *Correspondence: Vijay P. Singh, Sheo M. Prasad,
| | - Devendra K. Chauhan
- DD Pant Interdisciplinary Research Laboratory, Department of Botany, University of AllahabadAllahabad, India
| | - Sheo M. Prasad
- Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of AllahabadAllahabad, India
- *Correspondence: Vijay P. Singh, Sheo M. Prasad,
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