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Su Y, Ngea GLN, Wang K, Lu Y, Godana EA, Ackah M, Yang Q, Zhang H. Deciphering the mechanism of E3 ubiquitin ligases in plant responses to abiotic and biotic stresses and perspectives on PROTACs for crop resistance. PLANT BIOTECHNOLOGY JOURNAL 2024. [PMID: 38864414 DOI: 10.1111/pbi.14407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 05/12/2024] [Accepted: 05/27/2024] [Indexed: 06/13/2024]
Abstract
With global climate change, it is essential to find strategies to make crops more resistant to different stresses and guarantee food security worldwide. E3 ubiquitin ligases are critical regulatory elements that are gaining importance due to their role in selecting proteins for degradation in the ubiquitin-proteasome proteolysis pathway. The role of E3 Ub ligases has been demonstrated in numerous cellular processes in plants responding to biotic and abiotic stresses. E3 Ub ligases are considered a class of proteins that are difficult to control by conventional inhibitors, as they lack a standard active site with pocket, and their biological activity is mainly due to protein-protein interactions with transient conformational changes. Proteolysis-targeted chimeras (PROTACs) are a new class of heterobifunctional molecules that have emerged in recent years as relevant alternatives for incurable human diseases like cancer because they can target recalcitrant proteins for destruction. PROTACs interact with the ubiquitin-proteasome system, principally the E3 Ub ligase in the cell, and facilitate proteasome turnover of the proteins of interest. PROTAC strategies harness the essential functions of E3 Ub ligases for proteasomal degradation of proteins involved in dysfunction. This review examines critical advances in E3 Ub ligase research in plant responses to biotic and abiotic stresses. It highlights how PROTACs can be applied to target proteins involved in plant stress response to mitigate pathogenic agents and environmental adversities.
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Affiliation(s)
- Yingying Su
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Guillaume Legrand Ngolong Ngea
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Fisheries Sciences, University of Douala, Douala, Cameroon
| | - Kaili Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yuchun Lu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Esa Abiso Godana
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Michael Ackah
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Qiya Yang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Hongyin Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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Parmagnani AS, Kanchiswamy CN, Paponov IA, Bossi S, Malnoy M, Maffei ME. Bacterial Volatiles (mVOC) Emitted by the Phytopathogen Erwinia amylovora Promote Arabidopsis thaliana Growth and Oxidative Stress. Antioxidants (Basel) 2023; 12:antiox12030600. [PMID: 36978848 PMCID: PMC10045578 DOI: 10.3390/antiox12030600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/21/2023] [Accepted: 02/25/2023] [Indexed: 03/04/2023] Open
Abstract
Phytopathogens are well known for their devastating activity that causes worldwide significant crop losses. However, their exploitation for crop welfare is relatively unknown. Here, we show that the microbial volatile organic compound (mVOC) profile of the bacterial phytopathogen, Erwinia amylovora, enhances Arabidopsis thaliana shoot and root growth. GC-MS head-space analyses revealed the presence of typical microbial volatiles, including 1-nonanol and 1-dodecanol. E. amylovora mVOCs triggered early signaling events including plasma transmembrane potential Vm depolarization, cytosolic Ca2+ fluctuation, K+-gated channel activity, and reactive oxygen species (ROS) and nitric oxide (NO) burst from few minutes to 16 h upon exposure. These early events were followed by the modulation of the expression of genes involved in plant growth and defense responses and responsive to phytohormones, including abscisic acid, gibberellin, and auxin (including the efflux carriers PIN1 and PIN3). When tested, synthetic 1-nonanol and 1-dodecanol induced root growth and modulated genes coding for ROS. Our results show that E. amylovora mVOCs affect A. thaliana growth through a cascade of early and late signaling events that involve phytohormones and ROS.
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Affiliation(s)
- Ambra S. Parmagnani
- Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/a, 10135 Turin, Italy
| | | | - Ivan A. Paponov
- Department of Food Science, Aarhus University, 8200 Aarhus, Denmark
| | - Simone Bossi
- Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/a, 10135 Turin, Italy
| | - Mickael Malnoy
- Research and Innovation Centre, Edmund Mach Foundation, Via Edmund Mach 1, 38098 San Michele all’Adige, Italy
| | - Massimo E. Maffei
- Department of Life Sciences and Systems Biology, University of Turin, Via Quarello 15/a, 10135 Turin, Italy
- Correspondence: ; Tel.: +39-011-670-5967
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Jain N, Khurana P, Khurana JP. AtTLP2, a Tubby-like protein, plays intricate roles in abiotic stress signalling. PLANT CELL REPORTS 2023; 42:235-252. [PMID: 36437308 DOI: 10.1007/s00299-022-02953-z] [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: 10/29/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
The Arabidopsis Tubby-like protein (TLP) encoding gene, AtTLP2, plays intricate roles during ABA-dependent abiotic stress signalling, particularly salt and dehydration stress responses. TLPs (Tubby-like proteins) are a small group of eukaryotic proteins characterized by the presence of a Tubby domain. The plant TLPs have been widely shown to play important roles during abiotic stress signaling. In this study, we investigated the role of an Arabidopsis TLP, AtTLP2, in mediating abiotic stress responses. Both attlp2 null mutant and overexpression (OE) lines, in Arabidopsis, were studied which indicated the role of the gene also in development. The attlp2 mutant showed an overall dwarfism, while its overexpression caused enhanced growth. AtTLP2 localized to the plasma membrane (PM) and showed nuclear translocation in response to dehydration stress. The protein interacted with ASK1 and ASK2, but failed to show transactivation activity in yeast. AtTLP2 was transcriptionally induced by stress, caused by salt, dehydration and ABA. The attlp2 mutant was insensitive to ABA, but hypersensitive to oxidative stress at all stages of growth. ABA insensitivity conferred tolerance to salt and osmotic stresses at the germination and early seedling growth stages, but caused hypersensitivity to salt and drought stresses at advanced stages of growth. The OE lines were more sensitive to ABA, causing increased sensitivity to most stresses at the seed germination stage, but conferring tolerance to salt and osmotic stresses at more advanced stages of development. The stomata of the attlp2 mutant were less responsive to ABA and H2O2, while that of the OE lines exhibited greater sensitivity. Several ABA-regulated stress responsive marker genes were found to be downregulated in the mutant, but upregulated in the OE lines. The study establishes that AtTLP2 plays intricate roles in abiotic stress signaling, and the response may be largely ABA dependent.
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Affiliation(s)
- Nitin Jain
- Interdisciplinary Centre for Plant Genomics & Department of Plant Molecular Biology, University of Delhi, South Campus, New Delhi, 110021, India
| | - Paramjit Khurana
- Interdisciplinary Centre for Plant Genomics & Department of Plant Molecular Biology, University of Delhi, South Campus, New Delhi, 110021, India.
| | - Jitendra P Khurana
- Interdisciplinary Centre for Plant Genomics & Department of Plant Molecular Biology, University of Delhi, South Campus, New Delhi, 110021, India
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Yu X, Zhao X, Yang Y, Li Z. Quantitative Proteomics Reveals SOS2-Related Proteins in Arabidopsis Under
Salt Stress. CURR PROTEOMICS 2022. [DOI: 10.2174/1570164618666210413105907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Soil salinity is a major issue that seriously affects plant growth and cultivated
land utilization. Salt tolerance is one of the most fundamental biological processes that ensures
plant’s survival. SOS2 is one of the most important components of the Salt Overly Sensitive
(SOS) signaling pathway, which maintains plant ion homeostasis under salt stress. The SOS2-related
signaling pathways remain incompletely exploited especially at the proteomics level.
Objective:
In this paper, proteins potentially interacting with and regulated by SOS2 in Arabidopsis
were identified.
Methods:
The proteomes of Arabidopsis Wild Type (WT) and SOS2-deficient mutant (sos2-2) exposed
to 100 mM NaCl for 6 h were compared, proteins were identified using data-independent acquisition-
based quantitative proteomics strategy.
Results:
A total of 7470 proteins were identified and quantified, 372 Differentially Expressed Proteins
(DEP) were detected between WT and sos2-2 mutant under normal condition and 179 DEPs
were identified under salt treatment. Functional analysis showed that the DEPs were mainly involved
in protein binding and catalytic activity. Among the DEPs under salt stress, the protein expressions
of AVP1, Photosystem II reaction center protein A, B, C, and stress-responsive protein
(KIN2) were significantly up-regulated. LHCA1, LHCA2, LHCA4, ATPD and ATPE were significantly
down-regulated. These proteins were involved in biological processes including: stress response,
photosynthesis, transport and heat shock.
Conclusion:
These results revealed complexity of the functions of SOS2 in maintaining intracellular
homeostasis, in addition to its function in sodium homeostasis. Plant salt resistance is not independent
but closely related to metabolic processes including photosystem, ATP synthase, transport
and other stress resistances.
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Affiliation(s)
- Xiang Yu
- College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xiaoyun Zhao
- College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Yongqing Yang
- College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Zhen Li
- College of Biological Sciences, China Agricultural University, Beijing 100193, China
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5
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Al-Saharin R, Hellmann H, Mooney S. Plant E3 Ligases and Their Role in Abiotic Stress Response. Cells 2022; 11:cells11050890. [PMID: 35269512 PMCID: PMC8909703 DOI: 10.3390/cells11050890] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 02/24/2022] [Accepted: 03/02/2022] [Indexed: 11/16/2022] Open
Abstract
Plants, as sessile organisms, have limited means to cope with environmental changes. Consequently, they have developed complex regulatory systems to ameliorate abiotic stresses im-posed by environmental changes. One such system is the ubiquitin proteasome pathway, which utilizes E3 ligases to target proteins for proteolytic degradation via the 26S proteasome. Plants ex-press a plethora of E3 ligases that are categorized into four major groups depending on their structure. They are involved in many biological and developmental processes in plants, such as DNA repair, photomorphogenesis, phytohormones signaling, and biotic stress. Moreover, many E3 ligase targets are proteins involved in abiotic stress responses, such as salt, drought, heat, and cold. In this review, we will provide a comprehensive overview of E3 ligases and their substrates that have been connected with abiotic stress in order to illustrate the diversity and complexity of how this pathway enables plant survival under stress conditions.
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Affiliation(s)
- Raed Al-Saharin
- Department of Applied Biology, Tafila Technical University, At-Tafilah 66110, Jordan
- Correspondence:
| | - Hanjo Hellmann
- School of Biological Sciences, Washington State University, Pullman, WA 99163, USA; (H.H.); (S.M.)
| | - Sutton Mooney
- School of Biological Sciences, Washington State University, Pullman, WA 99163, USA; (H.H.); (S.M.)
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Xiao S, Liu Y, Wang A, Liu Y, Li X, Liu Z, Li X, Yang Y, Wang J. The response of tartary buckwheat and 19 bZIP genes to abscisic acid (ABA). Mol Biol Rep 2021; 48:4341-4350. [PMID: 34097202 DOI: 10.1007/s11033-021-06449-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 05/27/2021] [Indexed: 10/21/2022]
Abstract
Tartary buckwheat is a kind of plant which can be used as medicine as well as edible. Abscisic acid (ABA) signaling plays an important role in the response of plants such as tartary buckwheat to drought and other stress. However, there are not many studies on tartary buckwheat by ABA treatment. In this study, the germination, root length, stoma, and anthocyanin accumulation of tartary buckwheat were all significantly affected by ABA. ABA signaling is important for plants to respond to drought and other stresses, the bZIP gene family is an important member of the ABA signaling pathway. Through the analysis of the origin relationship between tartary buckwheat bZIP family and its related species, 19 bZIP genes in tartary buckwheat were found to be relatively conserved, which laid a foundation for further study of bZIP family. The qRT-PCR results showed that most of the group members were induced by ABA treatment, including 0, 15, 30, 50, 70 µM ABA and 0, 0.5, 2, 4, 8, 16, 24 h ABA treatment. These results suggested that ABA could affect the growth and development of tartary buckwheat, and FtbZIPs might have different functions in the response of tartary buckwheat to drought. This study will be helpful to further analyze the genetic breeding and economic value of tartary buckwheat resistance.
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Affiliation(s)
- Shuya Xiao
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Yu Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Anhu Wang
- Xichang College, Xichang, 615000, China
| | - Yaodong Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Xiaoyi Li
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Zhibin Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Xufeng Li
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Yi Yang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Jianmei Wang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China.
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Sirko A, Wawrzyńska A, Brzywczy J, Sieńko M. Control of ABA Signaling and Crosstalk with Other Hormones by the Selective Degradation of Pathway Components. Int J Mol Sci 2021; 22:4638. [PMID: 33924944 PMCID: PMC8125534 DOI: 10.3390/ijms22094638] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 04/25/2021] [Accepted: 04/26/2021] [Indexed: 12/13/2022] Open
Abstract
A rapid and appropriate genetic and metabolic acclimation, which is crucial for plants' survival in a changing environment, is maintained due to the coordinated action of plant hormones and cellular degradation mechanisms influencing proteostasis. The plant hormone abscisic acid (ABA) rapidly accumulates in plants in response to environmental stress and plays a pivotal role in the reaction to various stimuli. Increasing evidence demonstrates a significant role of autophagy in controlling ABA signaling. This field has been extensively investigated and new discoveries are constantly being provided. We present updated information on the components of the ABA signaling pathway, particularly on transcription factors modified by different E3 ligases. Then, we focus on the role of selective autophagy in ABA pathway control and review novel evidence on the involvement of autophagy in different parts of the ABA signaling pathway that are important for crosstalk with other hormones, particularly cytokinins and brassinosteroids.
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Affiliation(s)
- Agnieszka Sirko
- Laboratory of Plant Protein Homeostasis, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, ul. Pawinskiego 5A, 02-106 Warsaw, Poland; (J.B.); (M.S.)
| | - Anna Wawrzyńska
- Laboratory of Plant Protein Homeostasis, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, ul. Pawinskiego 5A, 02-106 Warsaw, Poland; (J.B.); (M.S.)
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Mateo de Arias M, Gao L, Sherwood DA, Dwivedi KK, Price BJ, Jamison M, Kowallis BM, Carman JG. Whether Gametophytes are Reduced or Unreduced in Angiosperms Might Be Determined Metabolically. Genes (Basel) 2020; 11:genes11121449. [PMID: 33276690 PMCID: PMC7761559 DOI: 10.3390/genes11121449] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/23/2020] [Accepted: 11/27/2020] [Indexed: 02/07/2023] Open
Abstract
In angiosperms, meiotic failure coupled with the formation of genetically unreduced gametophytes in ovules (apomeiosis) constitute major components of gametophytic apomixis. These aberrant developmental events are generally thought to be caused by mutation. However, efforts to locate the responsible mutations have failed. Herein, we tested a fundamentally different hypothesis: apomeiosis is a polyphenism of meiosis, with meiosis and apomeiosis being maintained by different states of metabolic homeostasis. Microarray analyses of ovules and pistils were used to differentiate meiotic from apomeiotic processes in Boechera (Brassicaceae). Genes associated with translation, cell division, epigenetic silencing, flowering, and meiosis characterized sexual Boechera (meiotic). In contrast, genes associated with stress responses, abscisic acid signaling, reactive oxygen species production, and stress attenuation mechanisms characterized apomictic Boechera (apomeiotic). We next tested whether these metabolic differences regulate reproductive mode. Apomeiosis switched to meiosis when premeiotic ovules of apomicts were cultured on media that increased oxidative stress. These treatments included drought, starvation, and H2O2 applications. In contrast, meiosis switched to apomeiosis when premeiotic pistils of sexual plants were cultured on media that relieved oxidative stress. These treatments included antioxidants, glucose, abscisic acid, fluridone, and 5-azacytidine. High-frequency apomeiosis was initiated in all sexual species tested: Brassicaceae, Boechera stricta, Boechera exilis, and Arabidopsis thaliana; Fabaceae, Vigna unguiculata; Asteraceae, Antennaria dioica. Unreduced gametophytes formed from ameiotic female and male sporocytes, first division restitution dyads, and nucellar cells. These results are consistent with modes of reproduction and types of apomixis, in natural apomicts, being regulated metabolically.
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Affiliation(s)
- Mayelyn Mateo de Arias
- Plants, Soils, and Climate Department, Utah State University, Logan, UT 84322-4820, USA; (M.M.d.A.); (L.G.); (D.A.S.); (B.J.P.)
- Instituto Tecnológico de Santo Domingo, 10103 Santo Domingo, Dominican Republic
| | - Lei Gao
- Plants, Soils, and Climate Department, Utah State University, Logan, UT 84322-4820, USA; (M.M.d.A.); (L.G.); (D.A.S.); (B.J.P.)
- College of Pharmacy and Life Science, Jiujiang University, Jiujiang 332000, China
| | - David A. Sherwood
- Plants, Soils, and Climate Department, Utah State University, Logan, UT 84322-4820, USA; (M.M.d.A.); (L.G.); (D.A.S.); (B.J.P.)
- Sherwood Pet Health, Logan, UT 84321, USA
| | - Krishna K. Dwivedi
- Caisson Laboratories, Inc., Smithfield, UT 84335, USA; (K.K.D.); (M.J.); (B.M.K.)
- Crop Improvement Division, Indian Grassland and Fodder Research Institute, 284003 Jhansi, India
| | - Bo J. Price
- Plants, Soils, and Climate Department, Utah State University, Logan, UT 84322-4820, USA; (M.M.d.A.); (L.G.); (D.A.S.); (B.J.P.)
- Molecular Biology Program, University of Utah, Salt Lake City, UT 84112-5750, USA
| | - Michelle Jamison
- Caisson Laboratories, Inc., Smithfield, UT 84335, USA; (K.K.D.); (M.J.); (B.M.K.)
- Wescor, Inc. An Elitech Company, Logan, UT 84321, USA
| | - Becky M. Kowallis
- Caisson Laboratories, Inc., Smithfield, UT 84335, USA; (K.K.D.); (M.J.); (B.M.K.)
- Cytiva, Inc., Logan, UT 84321, USA
| | - John G. Carman
- Plants, Soils, and Climate Department, Utah State University, Logan, UT 84322-4820, USA; (M.M.d.A.); (L.G.); (D.A.S.); (B.J.P.)
- Correspondence: ; Tel.: +1-435-512-4913
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Liu Y, Peng L, Gao X, Liu Y, Liu Z, Li X, Yang Y, Wang J. AtPPRT3, a novel E3 ubiquitin ligase, plays a positive role in ABA signaling. PLANT CELL REPORTS 2020; 39:1467-1478. [PMID: 32757028 DOI: 10.1007/s00299-020-02575-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/23/2020] [Indexed: 06/11/2023]
Abstract
KEY MESSAGE The RING-type E3 ligase AtPPRT3 participates in the plant ABA responding as a positive regulator. E3 ubiquitin ligase, alike of classic plant stress resistance proteins, plays a vital role in regulating the degradation of stress-related proteins. In this study, we investigated the function of the RING-type E3 ubiquitin ligase AtPPRT3 in the ABA signaling pathway. AtPPRT3, located in the endoplasmic reticulum membrane, is involved in ABA signaling. The transcriptional expression of AtPPRT3 was induced by ABA, and the promoter region upstream of AtPPRT3 contains the ABA-responsive element (ABRE). Additionally, the β-glucuronidase (GUS) gene driven by the AtPPRT3 promoter was up-regulated in transgenic plants after ABA treated. We obtained AtPPRT3 function-deficient mutants atpprt3-1, atpprt3-2, and AtPPRT3 over-expressing lines (OE4 and OE5). In this study, atpprt3-1 and atpprt3-2 were less sensitive to exogenous ABA compared to Col-0, whereas OE4 and OE5 were more sensitive. Moreover, AtPPRT3 promotes ABA-mediated stomatal closure and inhibits water loss in Arabidopsis thaliana. After exogenous ABA treated, the transcriptional expression levels of AtDREB2A, AtKIN1, AtRD29A, AtERD10 and AtRD29B were up-regulated to greater extents in OEs and lower extents in atpprt3-1 and atpprt3-2 compared to Col-0. These results suggest that AtPPRT3 positively regulates ABA signaling in A. thaliana.
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Affiliation(s)
- Yu Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Lu Peng
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Xuemeng Gao
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Yingying Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Zhibin Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Xufeng Li
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Yi Yang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Jianmei Wang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China.
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10
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Liu Y, Xiao S, Sun H, Pei L, Liu Y, Peng L, Gao X, Liu Y, Wang J. AtPPRT1, an E3 Ubiquitin Ligase, Enhances the Thermotolerance in Arabidopsis. PLANTS 2020; 9:plants9091074. [PMID: 32825569 PMCID: PMC7569766 DOI: 10.3390/plants9091074] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 12/13/2022]
Abstract
E3 ubiquitin ligase plays a vital role in the ubiquitin-mediated heat-related protein degradation pathway. Herein, we report that the expression of AtPPRT1, a C3HC4 zinc-finger ubiquitin E3 ligase gene, was induced by heat stress, and the β-glucuronidase (GUS) gene driven by the AtPPRT1 promoter has shown increased activity after basal and acquired thermotolerance. To further explore the function of AtPPRT1 in heat stress response (HSR), we used the atpprt1 mutant and AtPPRT1-overexpressing lines (OE2 and OE10) to expose in heat shock. In this study, the atpprt1 mutant had a lower germination and survival rate than those of Col-0 when suffered from the heat stress, whereas OEs enhanced basal and acquired thermotolerance in Arabidopsis seedlings. When compared to Col-0 and OEs, loss-of-function in AtPPRT1 resulted in lower chlorophyll retention and higher content of reactive oxygen species (ROS) after heat treatment. Moreover, the transcript levels of AtPPRT1 and several heat-related genes (AtZAT12, AtHSP21 and AtHSFA7a) were upregulated to greater extents in OEs and lower extents in atpprt1 compared to Col-0 after heat treated. Hence, we suggest that AtPPRT1 may act as a positive role in regulating the high temperature by mediating the degradation of unknown target proteins.
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11
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Liu Y, Pei L, Xiao S, Peng L, Liu Z, Li X, Yang Y, Wang J. AtPPRT1 negatively regulates salt stress response in Arabidopsis seedlings. PLANT SIGNALING & BEHAVIOR 2020; 15:1732103. [PMID: 32079457 PMCID: PMC7194377 DOI: 10.1080/15592324.2020.1732103] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Salt stress is one of the environmental factors that negatively affect plant growth and development. We have previously reported a putative C3HC4 zinc-finger ubiquitin E3 ligase (AtPPRT1) negatively regulates Abscisic acid (ABA) and drought stress response. According to previous studies, the accumulation of ABA in plants can further regulate the salt stress response. Therefore, in this study, we further analyzed whether AtPPRT1 negatively regulates the salt stress response. The results showed that AtPPRT1 expression was induced by salt stress. Furthermore, under salt stress, the β-glucuronidase (GUS) gene driven by the AtPPRT1 promoter has shown increased activity in the hypocotyl and petioles of Arabidopsis seedlings. Additionally, seedlings of the T-DNA insertion mutant atpprt1 showed significant growth advantage under salt stress, whereas overexpressing AtPPRT1 (OE lines) in Arabidopsis seedlings displayed hypersensitive under salt stress. Etiolated atpprt1 seedlings also demonstrated significantly elongated hypocotyl lengths in salt stress. The elevated or reduced salt tolerance of atpprt1 and AtPPRT1 overexpressing lines was confirmed by the changes in chlorophyll content and 3,3'-Diaminobenzidine (DAB) staining. The above data suggest that AtPPRT1 has a negative effect on salt tolerance in Arabidopsis seedlings.
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Affiliation(s)
- Yu Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Linsen Pei
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Shuya Xiao
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Lu Peng
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Zhibin Liu
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Xufeng Li
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Yi Yang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
| | - Jianmei Wang
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, China
- CONTACT Jianmei Wang ; Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, China
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Muthusamy M, Yoon EK, Kim JA, Jeong MJ, Lee SI. Brassica Rapa SR45a Regulates Drought Tolerance via the Alternative Splicing of Target Genes. Genes (Basel) 2020; 11:genes11020182. [PMID: 32050656 PMCID: PMC7074037 DOI: 10.3390/genes11020182] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/25/2020] [Accepted: 02/07/2020] [Indexed: 01/02/2023] Open
Abstract
The emerging evidence has shown that plant serine/arginine-rich (SR) proteins play a crucial role in abiotic stress responses by regulating the alternative splicing (AS) of key genes. Recently, we have shown that drought stress enhances the expression of SR45a (also known as SR-like 3) in Brassica rapa. Herein, we unraveled the hitherto unknown functions of BrSR45a in drought stress response by comparing the phenotypes, chlorophyll a fluorescence and splicing patterns of the drought-responsive genes of Arabidopsis BrSR45a overexpressors (OEs), homozygous mutants (SALK_052345), and controls (Col-0). Overexpression and loss of function did not result in aberrant phenotypes; however, the overexpression of BrSR45a was positively correlated with drought tolerance and the stress recovery rate in an expression-dependent manner. Moreover, OEs showed a higher drought tolerance index during seed germination (38.16%) than the control lines. Additionally, the overexpression of BrSR45a induced the expression of the drought stress-inducible genes RD29A, NCED3, and DREB2A under normal conditions. To further illustrate the molecular linkages between BrSR45a and drought tolerance, we investigated the AS patterns of key drought-tolerance and BrSR45a interacting genes in OEs, mutants, and controls under both normal and drought conditions. The splicing patterns of DCP5, RD29A, GOLS1, AKR, U2AF, and SDR were different between overexpressors and mutants under normal conditions. Furthermore, drought stress altered the splicing patterns of NCED2, SQE, UPF1, U4/U6-U5 tri-snRNP-associated protein, and UPF1 between OEs and mutants, indicating that both overexpression and loss of function differently influenced the splicing patterns of target genes. This study revealed that BrSR45a regulates the drought stress response via the alternative splicing of target genes in a concentration-dependent manner.
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Affiliation(s)
- Muthusamy Muthusamy
- Department of Agricultural Biotechnology, National Institute of Agricultural Sciences (NAS), RDA, Jeonju 54874, Korea; (M.M.); (J.A.K.); (M.-J.J.)
| | - Eun Kyung Yoon
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore;
| | - Jin A Kim
- Department of Agricultural Biotechnology, National Institute of Agricultural Sciences (NAS), RDA, Jeonju 54874, Korea; (M.M.); (J.A.K.); (M.-J.J.)
| | - Mi-Jeong Jeong
- Department of Agricultural Biotechnology, National Institute of Agricultural Sciences (NAS), RDA, Jeonju 54874, Korea; (M.M.); (J.A.K.); (M.-J.J.)
| | - Soo In Lee
- Department of Agricultural Biotechnology, National Institute of Agricultural Sciences (NAS), RDA, Jeonju 54874, Korea; (M.M.); (J.A.K.); (M.-J.J.)
- Correspondence: ; Tel.: +82-63-238-4618; Fax: +82-63-238-4604
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