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Alazem M, Burch-Smith TM. Roles of ROS and redox in regulating cell-to-cell communication: Spotlight on viral modulation of redox for local spread. PLANT, CELL & ENVIRONMENT 2024; 47:2830-2841. [PMID: 38168864 DOI: 10.1111/pce.14805] [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: 11/10/2023] [Revised: 12/18/2023] [Accepted: 12/19/2023] [Indexed: 01/05/2024]
Abstract
Reactive oxygen species (ROS) are important signalling molecules that influence many aspects of plant biology. One way in which ROS influence plant growth and development is by modifying intercellular trafficking through plasmodesmata (PD). Viruses have evolved to use PD for their local cell-to-cell spread between plant cells, so it is therefore not surprising that they have found ways to modulate ROS and redox signalling to optimise PD function for their benefit. This review examines how intracellular signalling via ROS and redox pathways regulate intercellular trafficking via PD during development and stress. The relationship between viruses and ROS-redox systems, and the strategies viruses employ to control PD function by interfering with ROS-redox in plants is also discussed.
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Affiliation(s)
- Mazen Alazem
- Donald Danforth Plant Science Center, Saint Louis, Missouri, USA
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2
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Lu X, Li Y, Akhtar M, Liu C, Ma T, Min W, Bai X, She Y, Chen L, Tian L, Li P, Luo C. A DUF966 gene family member OsDSR3 positively regulates alkali stress tolerance in rice. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 343:112072. [PMID: 38513731 DOI: 10.1016/j.plantsci.2024.112072] [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: 12/26/2023] [Revised: 03/03/2024] [Accepted: 03/18/2024] [Indexed: 03/23/2024]
Abstract
Rice growth and production are severely constrained by alkali stress. However, the mechanism underlying the rice tolerance to alkali stress is unclear. OsDSR3, a novel gene from the domains of unknown function 966 (DUF966) family, was identified and characterized for its function in the response of rice to alkali stress. The result of this study clearly showed that alkali stress significantly induced OsDSR3 expression level. Moreover, the expression of OsDSR3 was up-regulated by drought, salt, cold, H2O2 and abscisic acid (ABA), and down-regulated by gibberellic acid (GA3), and 2,4-Dichlorophenoxyacetic acid (2,4-D) treatments. Subcellular localization exhibited that OsDSR3 was detected in the nucleus and membrane. OsDSR3-overexpressing (OsDSR3-OE) plants showed higher tolerance to alkali stress than the wild-type (WT). In contrast, OsDSR3 knockout (OsDSR3-KO) mutants were more vulnerable to alkali stress. The differentially expressed genes (DEGs) among OsDSR3-OE and WT seedlings were mainly enriched in porphyrin and chlorophyll, starch and sucrose, and carotenoid metabolic pathways. Among these DEGs, 26 were identified as potential alkali stress-responsive genes, including several up-regulated genes like OsHAK5, OsGRX23 and OsNIR2. Consistent with the expression profiles of metabolic pathways-related genes, most of the metabolite contents and metabolite synthases activities were improved in OsDSR3-OE lines and decreased in OsDSR3-KO lines compared to WT. This may explain the higher tolerance of OE lines and lower tolerance of KO lines to alkali stress. These findings suggested that OsDSR3 positively regulates rice tolerance to alkali stress, which will help to elucidate the molecular mechanism underlying rice alkali tolerance.
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Affiliation(s)
- Xuping Lu
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Yan Li
- School of Life Sciences, Xiamen University, Xiamen 361102, China
| | - Maryam Akhtar
- College of Life Science, Northwest Normal University, Lanzhou 730070, China
| | - Caixia Liu
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Tianli Ma
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Weifang Min
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Xiaorong Bai
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Yangmengfei She
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Liang Chen
- School of Life Sciences, Xiamen University, Xiamen 361102, China
| | - Lei Tian
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Peifu Li
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China
| | - Chengke Luo
- School of Agriculture, Ningxia University, Yinchuan, Ningxia 750021, China; Key Laboratory of Modern Molecular Breeding for Dominant and Special Crops in Ningxia, Ningxia University, Yinchuan, Ningxia 750021, China.
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Mesa T, Munné-Bosch S. α-Tocopherol in chloroplasts: Nothing more than an antioxidant? CURRENT OPINION IN PLANT BIOLOGY 2023; 74:102400. [PMID: 37311290 DOI: 10.1016/j.pbi.2023.102400] [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: 03/31/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 06/15/2023]
Abstract
Among the eight forms of vitamin E, only tocopherols are essential compounds that are distributed throughout the entire plant kingdom, with α-tocopherol being the most predominant form in photosynthetic tissues. At the cellular level, α-tocopherol is of special relevance inside the chloroplast, where it eliminates singlet oxygen and modulates lipid peroxidation. This is of utmost relevance since tocopherols are the only antioxidants that counteract lipid peroxidation. Moreover, at the whole-plant level, α-tocopherol appears to modulate several physiological processes from germination to senescence. The antioxidant role of α-tocopherol at the cellular level can have profound effects at the whole-plant level, including the modulation of physiological processes that are apparently not related to redox processes and could be considered non-antioxidant functions. Here, we discuss whether non-antioxidant functions of α-tocopherol at the whole-plant level are mediated by its antioxidant role in chloroplasts and the regulation of redox processes at the cellular level.
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Affiliation(s)
- Tania Mesa
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Faculty of Biology, Av. Diagonal 643, E-08028, Barcelona, Spain
| | - Sergi Munné-Bosch
- Department of Evolutionary Biology, Ecology and Environmental Sciences, University of Barcelona, Faculty of Biology, Av. Diagonal 643, E-08028, Barcelona, Spain; Research Institute of Nutrition and Food Safety, University of Barcelona, Faculty of Biology, Av. Diagonal 643, E-08028, Barcelona, Spain.
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4
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Hill RD, de Castro J, Mira MM, Igamberdiev AU, Hebelstrup KH, Renault S, Xu W, Badea A, Stasolla C. Over-expression of the barley Phytoglobin 1 (HvPgb1) evokes leaf-specific transcriptional responses during root waterlogging. JOURNAL OF PLANT PHYSIOLOGY 2023; 283:153944. [PMID: 36933369 DOI: 10.1016/j.jplph.2023.153944] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Oxygen deprivation (hypoxia) in the root due to waterlogging causes profound metabolic changes in the aerial organs depressing growth and limiting plant productivity in barley (Hordeum vulgare L.). Genome-wide analyses in waterlogged wild type (WT) barley (cv. Golden Promise) plants and plants over-expressing the phytoglobin 1 HvPgb1 [HvPgb1(OE)] were performed to determine leaf specific transcriptional responses during waterlogging. Normoxic WT plants outperformed their HvPgb1(OE) counterparts for dry weight biomass, chlorophyll content, photosynthetic rate, stomatal conductance, and transpiration. Root waterlogging severely depressed all these parameters in WT plants but not in HvPgb1(OE) plants, which exhibited an increase in photosynthetic rate. In leaftissue, root waterlogging repressed genes encoding photosynthetic components and chlorophyll biosynthetic enzymes, while induced those of reactive oxygen species (ROS)-generating enzymes. This repression was alleviated in HvPgb1(OE) leaves which also exhibited an induction of enzymes participating in antioxidant responses. In the same leaves, the transcript levels of several genes participating in nitrogen metabolism were also higher relative to WT leaves. Ethylene levels were diminished by root waterlogging in leaves of WT plants, but not in HvPgb1(OE), which were enriched in transcripts of ethylene biosynthetic enzymes and ethylene response factors. Pharmacological treatments increasing the level or action of ethylene further suggested the requirement of ethylene in plant response to root waterlogging. In natural germplasm an elevation in foliar HvPgb1 between 16h and 24h of waterlogging occurred in tolerant genotypes but not in susceptible ones. By integrating morpho-physiological parameters with transcriptome data, this study provides a framework defining leaf responses to root waterlogging and indicates that the induction of HvPgb1 may be used as a selection tool to enhance resilience to excess moisture.
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Affiliation(s)
- Robert D Hill
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2N2, MB, Canada
| | - James de Castro
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2N2, MB, Canada
| | - Mohammed M Mira
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2N2, MB, Canada; Department of Botany and Microbiology, Tanta University, Tanta, Egypt.
| | - Abir U Igamberdiev
- Department of Biology, Memorial University of Newfoundland, St. John's, NL, A1C5S7, Canada
| | - Kim H Hebelstrup
- Department of Molecular Biology and Genetics, University of Aarhus, Forsogsvej 1, 4200, Slagelse, Denmark
| | - Sylvie Renault
- Department of Biological Sciences, University of Manitoba, Winnipeg, R3T2N2, MB, Canada
| | - Wayne Xu
- Brandon Research and Development Center, Agriculture and Agri-Food Canada, 2701 Grand Valley Road, Brandon, MB, R7A 5Y3, Canada
| | - Ana Badea
- Brandon Research and Development Center, Agriculture and Agri-Food Canada, 2701 Grand Valley Road, Brandon, MB, R7A 5Y3, Canada
| | - Claudio Stasolla
- Department of Plant Science, University of Manitoba, Winnipeg, R3T2N2, MB, Canada.
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Corti E, Falsini S, Schiff S, Tani C, Gonnelli C, Papini A. Saline Stress Impairs Lipid Storage Mobilization during Germination in Eruca sativa. PLANTS (BASEL, SWITZERLAND) 2023; 12:366. [PMID: 36679079 PMCID: PMC9862935 DOI: 10.3390/plants12020366] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/08/2023] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
Soil salinization become worse in the last decades, leading to reduced crop yields, especially in the Mediterranean basin. Eruca sativa is a common species cultivated in this area with remarkable economic importance. This study aimed at investigating the effect of salinity on this plant, focusing on (i) seedling development in terms of variations in germination and growth parameters and (ii) anatomical and ultra-structural changes in the morphology of cotyledons. For this reason, seeds were treated with different salinity levels ranging from 137 to 548 mM NaCl. Seed germination was delayed by all the concentrations tested, but only above 137 mM seedling growth was impaired. Results showed a high occurrence of lipid bodies within the mesophyll cells of cotyledons of seedlings exposed to salt concentrations above 137 mM, suggesting an impairment in lipid mobilization caused by salinity during plant development. The cotyledons of treated seedlings showed reduced intercellular spaces and ultrastructural changes in chloroplasts and peroxisomes. Moreover, salt-induced autophagic processes were present in samples grown at the highest NaCl levels. Interestingly, at 137 mM NaCl, seedlings showed the highest values of mesophyll thickness and fresh weight, implying a possible mechanism of salt adaptation during germination.
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Role of Tocochromanols in Tolerance of Cereals to Biotic Stresses: Specific Focus on Pathogenic and Toxigenic Fungal Species. Int J Mol Sci 2022; 23:ijms23169303. [PMID: 36012567 PMCID: PMC9408828 DOI: 10.3390/ijms23169303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/16/2022] [Accepted: 08/16/2022] [Indexed: 11/16/2022] Open
Abstract
Fungal pathogens capable of producing mycotoxins are one of the main threats to the cultivation of cereals and the safety of the harvested kernels. Improving the resistance of crops to fungal disease and accumulation of mycotoxins is therefore a crucial issue. Achieving this goal requires a deep understanding of plant defense mechanisms, most of them involving specialized metabolites. However, while numerous studies have addressed the contribution of phenylpropanoids and carotenoids to plant chemical defense, very few have dealt with tocochromanols. Tocochromanols, which encompass tocopherols and tocotrienols and constitute the vitamin E family, are widely distributed in cereal kernels; their biosynthetic pathway has been extensively studied with the aim to enrich plant oils and combat vitamin E deficiency in humans. Here we provide strong assumptions arguing in favor of an involvement of tocochromanols in plant–fungal pathogen interactions. These assumptions are based on both direct effects resulting from their capacity to scavenge reactive oxygen species, including lipid peroxyl radicals, on their potential to inhibit fungal growth and mycotoxin yield, and on more indirect effects mainly based on their role in plant protection against abiotic stresses.
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Wang Y, Sun J, Deng C, Teng S, Chen G, Chen Z, Cui X, Brutnell TP, Han X, Zhang Z, Lu T. Plasma membrane-localized SEM1 protein mediates sugar movement to sink rice tissues. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2022; 109:523-540. [PMID: 34750914 DOI: 10.1111/tpj.15573] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 11/01/2021] [Indexed: 06/13/2023]
Abstract
The translocation of photosynthate carbohydrates, such as sucrose, is critical for plant growth and crop yield. Previous studies have revealed that sugar transporters, plasmodesmata and sieve plates act as important controllers in sucrose loading into and unloading from phloem in the vascular system. However, other pivotal steps for the regulation of sucrose movement remain largely elusive. In this study, characterization of two starch excesses in mesophyll (sem) mutants and dye and sucrose export assays were performed to provide insights into the regulatory networks that drive source-sink relations in rice. Map-based cloning identified two allelic mutations in a gene encoding a GLUCAN SYNTHASE-LIKE (GSL) protein, thus indicating a role for SEM1 in callose biosynthesis. Subcellular localization in rice showed that SEM1 localized to the plasma membrane. In situ expression analysis and GUS staining showed that SEM1 was mainly expressed in vascular phloem cells. Reduced sucrose transport was found in the sem1-1/1-2 mutant, which led to excessive starch accumulation in source leaves and inhibited photosynthesis. Paraffin section and transmission electron microscopy experiments revealed that less-developed vascular cells (VCs) in sem1-1/1-2 potentially disturbed sugar movement. Moreover, dye and sugar trafficking experiments revealed that aberrant VC development was the main reason for the pleiotropic phenotype of sem1-1/1-2. In total, efficient sucrose loading into the phloem benefits from an optional number of VCs with a large vacuole that could act as a buffer holding tank for sucrose passing from the vascular bundle sheath.
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Affiliation(s)
- Yanwei Wang
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Jing Sun
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Chen Deng
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Shouzhen Teng
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Guoxin Chen
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Zhenhua Chen
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Xuean Cui
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Thomas P Brutnell
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Xiao Han
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, 350108, China
| | - Zhiguo Zhang
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
| | - Tiegang Lu
- Joint CAAS/IRRI Laboratory for Photosynthetic Enhancement, Biotechnology Research Institute/National Key Facility for Genetic Resources and Gene Improvement, The Chinese Academy of Agricultural Sciences, Beijing, 100081, P. R. China
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Surówka E, Latowski D, Dziurka M, Rys M, Maksymowicz A, Żur I, Olchawa-Pajor M, Desel C, Krzewska M, Miszalski Z. ROS-Scavengers, Osmoprotectants and Violaxanthin De-Epoxidation in Salt-Stressed Arabidopsis thaliana with Different Tocopherol Composition. Int J Mol Sci 2021; 22:11370. [PMID: 34768798 PMCID: PMC8583738 DOI: 10.3390/ijms222111370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/13/2021] [Accepted: 10/18/2021] [Indexed: 02/04/2023] Open
Abstract
To determine the role of α- and γ-tocopherol (TC), this study compared the response to salt stress (200 mM NaCl) in wild type (WT) Arabidopsis thaliana (L.) Heynh. And its two mutants: (1) totally TC-deficient vte1; (2) vte4 accumulating γ-TC instead of α-TC; and (3) tmt transgenic line overaccumulating α-TC. Raman spectra revealed that salt-exposed α-TC accumulating plants were more flexible in regulating chlorophyll, carotenoid and polysaccharide levels than TC deficient mutants, while the plants overaccumulating γ-TC had the lowest levels of these biocompounds. Tocopherol composition and NaCl concentration affected xanthophyll cycle by changing the rate of violaxanthin de-epoxidation and zeaxanthin formation. NaCl treated plants with altered TC composition accumulated less oligosaccharides than WT plants. α-TC deficient plants increased their oligosaccharide levels and reduced maltose amount, while excessive accumulation of α-TC corresponded with enhanced amounts of maltose. Salt-stressed TC-deficient mutants and tmt transgenic line exhibited greater proline levels than WT plants, lower chlorogenic acid levels, and lower activity of catalase and peroxidases. α-TC accumulating plants produced more methylated proline- and glycine- betaines, and showed greater activity of superoxide dismutase than γ-TC deficient plants. Under salt stress, α-TC demonstrated a stronger regulatory effect on carbon- and nitrogen-related metabolites reorganization and modulation of antioxidant patterns than γ-TC. This suggested different links of α- and γ-TCs with various metabolic pathways via various functions and metabolic loops.
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Affiliation(s)
- Ewa Surówka
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239 Kraków, Poland; (M.D.); (M.R.); (A.M.); (I.Ż); (M.K.)
| | - Dariusz Latowski
- Faculty of Biochemistry, Biophysics and Biotechnology of the Jagiellonian University, ul. Gronostajowa 7, 30-387 Kraków, Poland
| | - Michał Dziurka
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239 Kraków, Poland; (M.D.); (M.R.); (A.M.); (I.Ż); (M.K.)
| | - Magdalena Rys
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239 Kraków, Poland; (M.D.); (M.R.); (A.M.); (I.Ż); (M.K.)
| | - Anna Maksymowicz
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239 Kraków, Poland; (M.D.); (M.R.); (A.M.); (I.Ż); (M.K.)
| | - Iwona Żur
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239 Kraków, Poland; (M.D.); (M.R.); (A.M.); (I.Ż); (M.K.)
| | - Monika Olchawa-Pajor
- Department of Environmental Protection, Faculty of Mathematics and Natural Sciences, University of Applied Sciences in Tarnow, Mickiewicza 8, 33-100 Tarnów, Poland;
| | - Christine Desel
- Botanical Institute of the Christian-Albrechts-Universität zu Kiel, Am Botanischen Garten 1-9, 24118 Kiel, Germany;
| | - Monika Krzewska
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239 Kraków, Poland; (M.D.); (M.R.); (A.M.); (I.Ż); (M.K.)
| | - Zbigniew Miszalski
- W. Szafer Institute of Botany, Polish Academy of Sciences, ul. Lubicz 46, 31-512 Kraków, Poland;
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Ma Q, Wu C, Liang S, Yuan Y, Liu C, Liu J, Feng B. The Alkali Tolerance of Broomcorn Millet ( Panicum miliaceum L.) at the Germination and Seedling Stage: The Case of 296 Broomcorn Millet Genotypes. FRONTIERS IN PLANT SCIENCE 2021; 12:711429. [PMID: 34497625 PMCID: PMC8419447 DOI: 10.3389/fpls.2021.711429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 07/26/2021] [Indexed: 06/13/2023]
Abstract
Broomcorn millet (BM), one of the earliest domesticated cereal crops originating in northern China, can tolerate extreme conditions, such as drought and high temperatures, which are prevalent in saline-alkali, arid, and barren landscapes. However, its adaptive mechanism to alkali stress is yet to be comprehensively understood. In this study, 80 and 40 mM standard alkali stress concentrations were used to, respectively, evaluate the alkali tolerance at the germination and seedling stages of 296 BM genotypes. Principal component analysis (PCA), Pearson's correlation analysis, and F-value comprehensive analysis were performed on the germination parameters (germination potential, germination index, germination rate, vigor index, root length/weight, sprout length/weight, and alkali damage rate). Based on their respective F-values, the BM genotypes were divided into five categories ranging from highly alkali resistant to alkali sensitive. To study the response of seedlings to alkaline stress, we investigated the phenotypic parameters (plant height, green leaf area, biomass, and root structure) of 111 genotypes from the above five categories. Combining the parameters of alkali tolerance at the germination and seedling stages, these 111 genotypes were further subdivided into three groups with different alkali tolerances. Variations in physiological responses of the different alkali-tolerant genotypes were further investigated for antioxidant enzyme activity, soluble substances, malondialdehyde (MDA) content, electrolyte leakage rate, and leaf structure. Compared with alkali-sensitive genotypes, alkali-tolerant genotypes had high antioxidant enzyme activity and soluble osmolyte content, low MDA content and electrolyte leakage rate, and a more complete stomata structure. Taken together, this study provides a comprehensive and reliable method for evaluating alkali tolerance and will contribute to the improvement and restoration of saline-alkaline soils by BM.
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Affiliation(s)
| | | | | | | | | | | | - Baili Feng
- College of Agronomy, State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, Yangling, China
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10
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Zeng R, Chen T, Wang X, Cao J, Li X, Xu X, Chen L, Xia Q, Dong Y, Huang L, Wang L, Zhang J, Zhang L. Physiological and Expressional Regulation on Photosynthesis, Starch and Sucrose Metabolism Response to Waterlogging Stress in Peanut. FRONTIERS IN PLANT SCIENCE 2021; 12:601771. [PMID: 34276712 PMCID: PMC8283264 DOI: 10.3389/fpls.2021.601771] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 04/07/2021] [Indexed: 05/28/2023]
Abstract
Waterlogging has negative effects on crop yield. Physiological and transcriptome data of two peanut cultivars [Zhongkaihua 1 (ZKH 1) and Huayu 39 (HY 39)] were studied under normal water supply and waterlogging stress for 5 or 10 days at the flowering stage. The results showed that the main stem height, the number of lateral branches, lateral branch length, and the stem diameter increased under waterlogging stress, followed by an increase in dry matter accumulation, which was correlated with the increase in the soil and plant analysis development (SPAD) and net photosynthetic rate (Pn) and the upregulation of genes related to porphyrin and chlorophyll metabolism and photosynthesis. However, the imbalance of the source-sink relationship under waterlogging was the main cause of yield loss, and waterlogging caused an increase in the sucrose and soluble sugar contents and a decrease in the starch content; it also decreased the activities of sucrose synthetase (SS) and sucrose phosphate synthetase (SPS), which may be due to the changes in the expression of genes related to starch and sucrose metabolism. However, the imbalance of the source-sink relationship led to the accumulation of photosynthate in the stems and leaves, which resulted in the decrease of the ratio of pod dry weight to total dry weight (PDW/TDW) and yield. Compared with ZKH 1, the PDW of HY 39 decreased more probably because more photosynthate accumulated in the stem and leaves of HY 39 and could not be effectively transported to the pod.
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Affiliation(s)
- Ruier Zeng
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Tingting Chen
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Xinyue Wang
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Jing Cao
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Xi Li
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Xueyu Xu
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Lei Chen
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Qing Xia
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Yonglong Dong
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Luping Huang
- College of Agriculture, South China Agricultural University, Guangzhou, China
| | - Leidi Wang
- College of Agriculture, South China Agricultural University, Guangzhou, China
- Bio-Tech Research Center, Shandong Academy of Agricultural Science, Jinan, China
| | - Jialei Zhang
- Bio-Tech Research Center, Shandong Academy of Agricultural Science, Jinan, China
| | - Lei Zhang
- College of Agriculture, South China Agricultural University, Guangzhou, China
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11
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Surówka E, Potocka I, Dziurka M, Wróbel-Marek J, Kurczyńska E, Żur I, Maksymowicz A, Gajewska E, Miszalski Z. Tocopherols mutual balance is a key player for maintaining Arabidopsis thaliana growth under salt stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 156:369-383. [PMID: 33007531 DOI: 10.1016/j.plaphy.2020.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/07/2020] [Indexed: 05/26/2023]
Abstract
Enhanced channeling carbon through pathways: shikimate/chorismate, benzenoid-phenylopropanoid or 2-C-methyl-D-erythritol 4-phosphate (MEP) provides a multitude of secondary metabolites and cell wall components and allows plants response to environmental stresses. Through the biosynthetic pathways, different secondary metabolites, like tocopherols (TCs), are bind to mutual dependencies and metabolic loops, that are not yet fully understood. We compared, in parallel, the influence of α- and γ-TCs on metabolites involved in osmoprotective/antioxidative response, and physico-chemical modification of plasma membrane and cell wall. We studied Arabidopsis thaliana Columbia ecotype (WT), mutant vte1 deficient in α- and γ-TCs, mutant vte4 over-accumulating γ-TC instead of α-TC, and transgenic line tmt over-accumulating α-TC; exposed to NaCl. The results indicate that salt stress activates β-carboxylation processes in WT plants and in plants with altered TCs accumulation. In α-TC-deficient plants, NaCl causes ACC decrease, but does not change SA, whose concentration remains higher than in α-TC accumulating plants. α/γ-TCs contents influence carbohydrates, poliamines, phenolic (caffeic, ferrulic, cinnamic) acids accumulation patterns. Salinity results in increased detection of the LM5 galactan and LM19 homogalacturonan epitopes in α-TC accumulating plants, and the LM6 arabinan and MAC207 AGP epitopes in α-TC deficient mutants. Parallel, plants with altered TCs composition show decreased both the cell turgor and elastic modulus determined at the individual cell level. α-TC deficient plants reveal lower values of cell turgor and elastic modulus, but higher cell hydraulic conductivity than α-TC accumulating plants. Under salt stress, α-TC shows stronger regulatory effect than γ-TC through the impact on chloroplastic biosynthetic pathways and ROS/osmotic-modulating compounds.
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Affiliation(s)
- Ewa Surówka
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239, Kraków, Poland.
| | - Izabela Potocka
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Jagiellońska 28, 40-032, Katowice, Poland.
| | - Michał Dziurka
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239, Kraków, Poland
| | - Justyna Wróbel-Marek
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Jagiellońska 28, 40-032, Katowice, Poland
| | - Ewa Kurczyńska
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Jagiellońska 28, 40-032, Katowice, Poland.
| | - Iwona Żur
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239, Kraków, Poland
| | - Anna Maksymowicz
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239, Kraków, Poland
| | - Ewa Gajewska
- Department of Plant Physiology and Biochemistry, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12/16, 90-237, Łódź, Poland
| | - Zbigniew Miszalski
- The Franciszek Górski Institute of Plant Physiology of the Polish Academy of Sciences, ul. Niezapominajek 21, 30-239, Kraków, Poland
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12
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Almasia NI, Nahirñak V, Hopp HE, Vazquez-Rovere C. Potato Snakin-1: an antimicrobial player of the trade-off between host defense and development. PLANT CELL REPORTS 2020; 39:839-849. [PMID: 32529484 DOI: 10.1007/s00299-020-02557-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 06/05/2020] [Indexed: 06/11/2023]
Abstract
Snakin-1 (SN1) from potato is a cysteine-rich antimicrobial peptide with high evolutionary conservation. It has 63 amino acid residues, 12 of which are cysteines capable of forming six disulfide bonds. SN1 localizes in the plasma membrane, and it is present mainly in tissues associated with active growth and cell division. SN1 is active in vitro against bacteria, fungus, yeasts, and even animal/human pathogens. It was demonstrated that it also confers in vivo protection against commercially relevant pathogens in overexpressing potato, wheat, and lettuce plants. Although researchers have demonstrated SN1 can disrupt the membranes of E. coli, its integral antimicrobial mechanism remains unknown. It is likely that broad-spectrum antimicrobial activity is a combined outcome of membrane disruption and inhibition of intracellular functions. Besides, in potato, partial SN1 silencing affects cell division, leaf metabolism, and cell wall composition, thus revealing additional roles in growth and development. Its silencing also affects reactive oxygen species (ROS) and ROS scavenger levels. This finding indicates its participation in redox balance. Moreover, SN1 alters hormone levels, suggesting its involvement in the complex hormonal crosstalk. Altogether, SN1 has the potential to integrate development and defense signals directly and/or indirectly by modulating protein activity, modifying hormone balance and/or participating in redox regulation. Evidence supports a paramount role to SN1 in the mechanism underlying growth and immunity balance. Furthermore, SN1 may be a promising candidate in preservation, and pharmaceutical or agricultural biotechnology applications.
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Affiliation(s)
- Natalia Inés Almasia
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de investigaciones Científicas y Tecnológicas (CONICET), Los Reseros y Nicolas Repetto, Hurlingham, Argentina.
| | - Vanesa Nahirñak
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de investigaciones Científicas y Tecnológicas (CONICET), Los Reseros y Nicolas Repetto, Hurlingham, Argentina
| | - H Esteban Hopp
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de investigaciones Científicas y Tecnológicas (CONICET), Los Reseros y Nicolas Repetto, Hurlingham, Argentina
| | - Cecilia Vazquez-Rovere
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), CICVyA, Instituto Nacional de Tecnología Agropecuaria (INTA), Consejo Nacional de investigaciones Científicas y Tecnológicas (CONICET), Los Reseros y Nicolas Repetto, Hurlingham, Argentina
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13
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Schmidt A, Mächtel R, Ammon A, Engelsdorf T, Schmitz J, Maurino VG, Voll LM. Reactive oxygen species dosage in Arabidopsis chloroplasts can improve resistance towards Colletotrichum higginsianum by the induction of WRKY33. THE NEW PHYTOLOGIST 2020; 226:189-204. [PMID: 31749193 DOI: 10.1111/nph.16332] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/12/2019] [Indexed: 05/06/2023]
Abstract
Arabidopsis plants overexpressing glycolate oxidase in chloroplasts (GO5) and loss-of-function mutants of the major peroxisomal catalase isoform, cat2-2, produce increased hydrogen peroxide (H2 O2 ) amounts from the respective organelles when subjected to photorespiratory conditions like increased light intensity. Here, we have investigated if and how the signaling processes triggered by H2 O2 production in response to shifts in environmental conditions and the concomitant induction of indole phytoalexin biosynthesis in GO5 affect susceptibility towards the hemibiotrophic fungus Colletotrichum higginsianum. Combining histological, biochemical, and molecular assays, we found that the accumulation of the phytoalexin camalexin was comparable between GO genotypes and cat2-2 in the absence of pathogen. Compared with wild-type, GO5 showed improved resistance after light-shift-mediated production of H2 O2 , whereas cat2-2 became more susceptible and allowed significantly more pathogen entry. Unlike GO5, cat2-2 suffered from severe oxidative stress after light shifts, as indicated by glutathione pool size and oxidation state. We discuss a connection between elevated oxidative stress and dampened induction of salicylic acid mediated defense in cat2-2. Genetic analyses demonstrated that induced resistance of GO5 is dependent on WRKY33, but not on camalexin production. We propose that indole carbonyl nitriles might play a role in defense against C. higginsianum.
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Affiliation(s)
- Andree Schmidt
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Staudtstraße 5, 91058, Erlangen, Germany
| | - Rebecca Mächtel
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Staudtstraße 5, 91058, Erlangen, Germany
| | - Alexandra Ammon
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Staudtstraße 5, 91058, Erlangen, Germany
| | - Timo Engelsdorf
- Molecular Plant Physiology, Department of Biology, Philipps-University Marburg, Karl-von-Frisch Straße 8, 35043, Marburg, Germany
| | - Jessica Schmitz
- Institute of Developmental and Molecular Biology of Plants, Heinrich-Heine-University Düsseldorf and Cluster of Excellence on Plant Sciences (CEPLAS), Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Veronica G Maurino
- Institute of Developmental and Molecular Biology of Plants, Heinrich-Heine-University Düsseldorf and Cluster of Excellence on Plant Sciences (CEPLAS), Universitätsstraße 1, 40225, Düsseldorf, Germany
| | - Lars M Voll
- Division of Biochemistry, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Staudtstraße 5, 91058, Erlangen, Germany
- Molecular Plant Physiology, Department of Biology, Philipps-University Marburg, Karl-von-Frisch Straße 8, 35043, Marburg, Germany
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14
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Rodriguez M, Parola R, Andreola S, Pereyra C, Martínez-Noël G. TOR and SnRK1 signaling pathways in plant response to abiotic stresses: Do they always act according to the "yin-yang" model? PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 288:110220. [PMID: 31521220 DOI: 10.1016/j.plantsci.2019.110220] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 08/05/2019] [Accepted: 08/13/2019] [Indexed: 05/20/2023]
Abstract
Plants are sessile photo-autotrophic organisms continuously exposed to a variety of environmental stresses. Monitoring the sugar level and energy status is essential, since this knowledge allows the integration of external and internal cues required for plant physiological and developmental plasticity. Most abiotic stresses induce severe metabolic alterations and entail a great energy cost, restricting plant growth and producing important crop losses. Therefore, balancing energy requirements with supplies is a major challenge for plants under unfavorable conditions. The conserved kinases target of rapamycin (TOR) and sucrose-non-fermenting-related protein kinase-1 (SnRK1) play central roles during plant growth and development, and in response to environmental stresses; these kinases affect cellular processes and metabolic reprogramming, which has physiological and phenotypic consequences. The "yin-yang" model postulates that TOR and SnRK1 act in opposite ways in the regulation of metabolic-driven processes. In this review, we describe and discuss the current knowledge about the complex and intricate regulation of TOR and SnRK1 under abiotic stresses. We especially focus on the physiological perspective that, under certain circumstances during the plant stress response, the TOR and SnRK1 kinases could be modulated differently from what is postulated by the "yin-yang" concept.
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Affiliation(s)
- Marianela Rodriguez
- Instituto de Fisiología y Recursos Genéticos Vegetales (IFRGV), Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), Camino 60 Cuadras km 5.5, X5020ICA, Córdoba, Argentina; Unidad de Estudios Agropecuarios (UDEA- CONICET), Camino 60 Cuadras km 5.5 X5020ICA, Córdoba, Argentina.
| | - Rodrigo Parola
- Instituto de Fisiología y Recursos Genéticos Vegetales (IFRGV), Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), Camino 60 Cuadras km 5.5, X5020ICA, Córdoba, Argentina; Unidad de Estudios Agropecuarios (UDEA- CONICET), Camino 60 Cuadras km 5.5 X5020ICA, Córdoba, Argentina.
| | - Sofia Andreola
- Instituto de Fisiología y Recursos Genéticos Vegetales (IFRGV), Centro de Investigaciones Agropecuarias (CIAP), Instituto Nacional de Tecnología Agropecuaria (INTA), Camino 60 Cuadras km 5.5, X5020ICA, Córdoba, Argentina; Unidad de Estudios Agropecuarios (UDEA- CONICET), Camino 60 Cuadras km 5.5 X5020ICA, Córdoba, Argentina.
| | - Cintia Pereyra
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC-CONICET), y Fundación para Investigaciones Biológicas Aplicadas (FIBA), Vieytes 3103, 7600, Mar del Plata, Argentina.
| | - Giselle Martínez-Noël
- Instituto de Investigaciones en Biodiversidad y Biotecnología (INBIOTEC-CONICET), y Fundación para Investigaciones Biológicas Aplicadas (FIBA), Vieytes 3103, 7600, Mar del Plata, Argentina.
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15
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Zhang A, Han D, Wang Y, Mu H, Zhang T, Yan X, Pang Q. Transcriptomic and proteomic feature of salt stress-regulated network in Jerusalem artichoke (Helianthus tuberosus L.) root based on de novo assembly sequencing analysis. PLANTA 2018; 247:715-732. [PMID: 29185033 DOI: 10.1007/s00425-017-2818-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 11/18/2017] [Indexed: 05/21/2023]
Abstract
Ribosome activation and sugar metabolic process mainly act on the regulation of salt tolerance in the bioenergy crop Helianthus tuberosus L. as dissected by integrated transcriptomic and proteomic analyses. Helianthus tuberosus L. is an important halophyte plant that can survive in saline-alkali soil. It is vitally necessary to build an available genomic resource to investigate the molecular mechanisms underlying salt tolerance in H. tuberosus. De novo assembly and annotation of transcriptomes were built for H. tuberosus using a HiSeq 4000 platform. 293,823 transcripts were identified and annotated into 190,567 unigenes. In addition, iTRAQ-labeled quantitative proteomics was carried out to detect global protein profiling as a response to salt stress. Comparative omics analysis showed that 5432 genes and 43 proteins were differentially expressed in H. tuberosus under salt stress, which were enriched in the following processes: carbohydrate metabolism, ribosome activation and translation, oxidation-reduction and ion binding. The reprogramming of transcript and protein works suggested that the induced activity of ribosome and sugar signaling may endue H. tuberosus with salt tolerance. With high-quality sequencing and annotation, the obtained transcriptomics and proteomics provide a robust genomic resource for dissecting the regulatory molecular mechanism of H. tuberosus in response to salt stress.
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Affiliation(s)
- Aiqin Zhang
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Harbin, 150040, China
| | - Dongming Han
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Harbin, 150040, China
| | - Yu Wang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, 150080, China
| | - Huifang Mu
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Harbin, 150040, China
| | - Tong Zhang
- Department of Biology, University of Florida, Gainesville, FL, 32610, USA
| | - Xiufeng Yan
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Harbin, 150040, China
| | - Qiuying Pang
- Alkali Soil Natural Environmental Science Center, Northeast Forestry University/Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Harbin, 150040, China.
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16
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Durand M, Mainson D, Porcheron B, Maurousset L, Lemoine R, Pourtau N. Carbon source-sink relationship in Arabidopsis thaliana: the role of sucrose transporters. PLANTA 2018; 247:587-611. [PMID: 29138971 PMCID: PMC5809531 DOI: 10.1007/s00425-017-2807-4] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/30/2017] [Indexed: 05/18/2023]
Abstract
MAIN CONCLUSION The regulation of source-to-sink sucrose transport is associated with AtSUC and AtSWEET sucrose transporters' gene expression changes in plants grown hydroponically under different physiological conditions. Source-to-sink transport of sucrose is one of the major determinants of plant growth. Whole-plant carbohydrates' partitioning requires the specific activity of membrane sugar transporters. In Arabidopsis thaliana plants, two families of transporters are involved in sucrose transport: AtSUCs and AtSWEETs. This study is focused on the comparison of sucrose transporter gene expression, soluble sugar and starch levels and long distance sucrose transport, in leaves and sink organs (mainly roots) in different physiological conditions (along the plant life cycle, during a diel cycle, and during an osmotic stress) in plants grown hydroponically. In leaves, the AtSUC2, AtSWEET11, and 12 genes known to be involved in phloem loading were highly expressed when sucrose export was high and reduced during osmotic stress. In roots, AtSUC1 was highly expressed and its expression profile in the different conditions tested suggests that it may play a role in sucrose unloading in roots and in root growth. The SWEET transporter genes AtSWEET12, 13, and 15 were found expressed in all organs at all stages studied, while differential expression was noticed for AtSWEET14 in roots, stems, and siliques and AtSWEET9, 10 expressions were only detected in stems and siliques. A role for these transporters in carbohydrate partitioning in different source-sink status is proposed, with a specific attention on carbon demand in roots. During development, despite trophic competition with others sinks, roots remained a significant sink, but during osmotic stress, the amount of translocated [U-14C]-sucrose decreased for rosettes and roots. Altogether, these results suggest that source-sink relationship may be linked with the regulation of sucrose transporter gene expression.
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Affiliation(s)
- Mickaël Durand
- Université de Poitiers, UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Equipe "Sucres & Echanges Végétaux-Environnement", Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Dany Mainson
- Université de Poitiers, UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Equipe "Sucres & Echanges Végétaux-Environnement", Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Benoît Porcheron
- Université de Poitiers, UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Equipe "Sucres & Echanges Végétaux-Environnement", Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Laurence Maurousset
- Université de Poitiers, UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Equipe "Sucres & Echanges Végétaux-Environnement", Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Rémi Lemoine
- Université de Poitiers, UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Equipe "Sucres & Echanges Végétaux-Environnement", Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Nathalie Pourtau
- Université de Poitiers, UMR CNRS 7267 EBI Ecologie et Biologie des Interactions, Equipe "Sucres & Echanges Végétaux-Environnement", Bâtiment B31, 3 rue Jacques Fort, TSA 51106, 86073, Poitiers Cedex 9, France.
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17
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Dmitrieva VA, Ivanova AN, Tyutereva EV, Evkaikina AI, Klimova EA, Voitsekhovskaja OV. Chlorophyllide-a-Oxygenase (CAO) deficiency affects the levels of singlet oxygen and formation of plasmodesmata in leaves and shoot apical meristems of barley. PLANT SIGNALING & BEHAVIOR 2017; 12:e1300732. [PMID: 28272988 PMCID: PMC5437820 DOI: 10.1080/15592324.2017.1300732] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 02/20/2017] [Accepted: 02/21/2017] [Indexed: 05/19/2023]
Abstract
In plants, organogenesis and specification of cell layers and tissues rely on precise symplastic delivery of regulatory molecules via plasmodesmata. Accordingly, abundance and aperture of plasmodesmata at individual cell boundaries should be controlled by the plant. Recently, studies in Arabidopsis established reactive oxygen species as major regulators of plasmodesmata formation and gating. We show that in a barley mutant deficient in the synthesis of chlorophyll b, the numbers of plasmodesmata in leaves and in the shoot apical meristem are significantly higher than in the corresponding wild type, probably due to redox imbalance in the mutant. The resulting disturbance of symplasmic transport is likely to be the reason for the observed delayed floral transition in these mutants.
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Affiliation(s)
- Valeria A. Dmitrieva
- Laboratory of Plant Ecological Physiology, Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russia
| | - Alexandra N. Ivanova
- Laboratory of Plant Ecological Physiology, Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russia
- Laboratory of Plant Anatomy and Morphology, Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russia
| | - Elena V. Tyutereva
- Laboratory of Plant Ecological Physiology, Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russia
| | - Anastasiia I. Evkaikina
- Laboratory of Plant Ecological Physiology, Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russia
| | - Ekaterina A. Klimova
- Laboratory of Plant Ecological Physiology, Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russia
| | - Olga V. Voitsekhovskaja
- Laboratory of Plant Ecological Physiology, Komarov Botanical Institute, Russian Academy of Sciences, St.-Petersburg, Russia
- CONTACT Olga V. Voitsekhovskaja Plant Ecological Physiology, Komarov Botanical Institute RAS, ul. Professora Popova, 2, Saint Petersburg, 197376, Russia
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18
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Allu AD, Simancas B, Balazadeh S, Munné-Bosch S. Defense-Related Transcriptional Reprogramming in Vitamin E-Deficient Arabidopsis Mutants Exposed to Contrasting Phosphate Availability. FRONTIERS IN PLANT SCIENCE 2017; 8:1396. [PMID: 28848594 PMCID: PMC5554346 DOI: 10.3389/fpls.2017.01396] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 07/26/2017] [Indexed: 05/06/2023]
Abstract
Vitamin E inhibits the propagation of lipid peroxidation and helps protecting photosystem II from photoinhibition, but little is known about its possible role in plant response to Pi availability. Here, we aimed at examining the effect of vitamin E deficiency in Arabidopsis thaliana vte mutants on phytohormone contents and the expression of transcription factors in plants exposed to contrasting Pi availability. Plants were subjected to two doses of Pi, either unprimed (controls) or previously exposed to low Pi (primed). In the wild type, α-tocopherol contents increased significantly in response to repeated periods of low Pi, which was paralleled by increased growth, indicative of a priming effect. This growth-stimulating effect was, however, abolished in vte mutants. Hormonal profiling revealed significant effects of Pi availability, priming and genotype on the contents of jasmonates and salicylates; remarkably, vte mutants showed enhanced accumulation of both hormones under low Pi. Furthermore, expression profiling of 1,880 transcription factors by qRT-PCR revealed a pronounced effect of priming on the transcript levels of 45 transcription factors mainly associated with growth and stress in wild-type plants in response to low Pi availability; while distinct differences in the transcriptional response were detected in vte mutants. We conclude that α-tocopherol plays a major role in the response of plants to Pi availability not only by protecting plants from photo-oxidative stress, but also by exerting a control over growth- and defense-related transcriptional reprogramming and hormonal modulation.
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Affiliation(s)
- Annapurna D. Allu
- Institute of Biochemistry and Biology, University of PotsdamPotsdam-Golm, Germany
- Max-Planck-Institut für Molekulare PflanzenphysiologiePotsdam, Germany
| | - Bárbara Simancas
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of BarcelonaBarcelona, Spain
| | - Salma Balazadeh
- Institute of Biochemistry and Biology, University of PotsdamPotsdam-Golm, Germany
- Max-Planck-Institut für Molekulare PflanzenphysiologiePotsdam, Germany
| | - Sergi Munné-Bosch
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of BarcelonaBarcelona, Spain
- *Correspondence: Sergi Munné-Bosch,
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19
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Eggert E, Obata T, Gerstenberger A, Gier K, Brandt T, Fernie AR, Schulze W, Kühn C. A sucrose transporter-interacting protein disulphide isomerase affects redox homeostasis and links sucrose partitioning with abiotic stress tolerance. PLANT, CELL & ENVIRONMENT 2016; 39:1366-1380. [PMID: 26670204 DOI: 10.1111/pce.12694] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 12/08/2015] [Accepted: 12/08/2015] [Indexed: 06/05/2023]
Abstract
Sucrose accumulation in leaves in response to various abiotic stresses suggests a specific role of this disaccharide for stress tolerance and adaptation. The high-affinity transporter StSUT1 undergoes substrate-induced endocytosis presenting the question as to whether altered sucrose accumulation in leaves in response to stresses is also related to enhanced endocytosis or altered activity of the sucrose transporter. StSUT1 is known to interact with several stress-inducible proteins; here we investigated whether one of the interacting candidates, StPDI1, affects its subcellular localization in response to stress: StPDI1 expression is induced by ER-stress and salt. Both proteins, StSUT1 and StPDI1, were found in the detergent resistant membrane (DRM) fraction, and this might affect internalization. Knockdown of StPDI1 expression severely affects abiotic stress tolerance of transgenic potato plants. Analysis of these plants does not reveal modified subcellular localization or endocytosis of StSUT1, but rather a disturbed redox homeostasis, reduced detoxification of reactive oxygen species and effects on primary metabolism. Parallel observations with other StSUT1-interacting proteins are discussed. The redox status in leaves seems to be linked to the sugar status in response to various stress stimuli and to play a role in stress tolerance.
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Affiliation(s)
- Erik Eggert
- Humboldt University, Institute of Biology, Department of Plant Physiology, Philippstr. 13, Building 12, 10115, Berlin, Germany
| | - Toshihiro Obata
- MPI Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Anne Gerstenberger
- Humboldt University, Institute of Biology, Department of Plant Physiology, Philippstr. 13, Building 12, 10115, Berlin, Germany
| | - Konstanze Gier
- Humboldt University, Institute of Biology, Department of Plant Physiology, Philippstr. 13, Building 12, 10115, Berlin, Germany
| | - Tobias Brandt
- Humboldt University, Institute of Biology, Department of Plant Physiology, Philippstr. 13, Building 12, 10115, Berlin, Germany
| | - Alisdair R Fernie
- MPI Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Waltraud Schulze
- MPI Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
- University Hohenheim, Department of Plant Systems Biology, 70593, Stuttgart, Germany
| | - Christina Kühn
- Humboldt University, Institute of Biology, Department of Plant Physiology, Philippstr. 13, Building 12, 10115, Berlin, Germany
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Almeida J, Azevedo MDS, Spicher L, Glauser G, vom Dorp K, Guyer L, del Valle Carranza A, Asis R, de Souza AP, Buckeridge M, Demarco D, Bres C, Rothan C, Peres LEP, Hörtensteiner S, Kessler F, Dörmann P, Carrari F, Rossi M. Down-regulation of tomato PHYTOL KINASE strongly impairs tocopherol biosynthesis and affects prenyllipid metabolism in an organ-specific manner. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:919-34. [PMID: 26596763 PMCID: PMC4737080 DOI: 10.1093/jxb/erv504] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Tocopherol, a compound with vitamin E (VTE) activity, is a conserved constituent of the plastidial antioxidant network in photosynthetic organisms. The synthesis of tocopherol involves the condensation of an aromatic head group with an isoprenoid prenyl side chain. The latter, phytyl diphosphate, can be derived from chlorophyll phytol tail recycling, which depends on phytol kinase (VTE5) activity. How plants co-ordinate isoprenoid precursor distribution for supplying biosynthesis of tocopherol and other prenyllipids in different organs is poorly understood. Here, Solanum lycopersicum plants impaired in the expression of two VTE5-like genes identified by phylogenetic analyses, named SlVTE5 and SlFOLK, were characterized. Our data show that while SlFOLK does not affect tocopherol content, the production of this metabolite is >80% dependent on SlVTE5 in tomato, in both leaves and fruits. VTE5 deficiency greatly impacted lipid metabolism, including prenylquinones, carotenoids, and fatty acid phytyl esters. However, the prenyllipid profile greatly differed between source and sink organs, revealing organ-specific metabolic adjustments in tomato. Additionally, VTE5-deficient plants displayed starch accumulation and lower CO2 assimilation in leaves associated with mild yield penalty. Taken together, our results provide valuable insights into the distinct regulation of isoprenoid metabolism in leaves and fruits and also expose the interaction between lipid and carbon metabolism, which results in carbohydrate export blockage in the VTE5-deficient plants, affecting tomato fruit quality.
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Affiliation(s)
- Juliana Almeida
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, 05508-900, São Paulo, Brazil
| | - Mariana da Silva Azevedo
- Departamento de Ciências Biológicas, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, Brazil
| | - Livia Spicher
- Laboratory of Plant Physiology, University of Neuchâtel, 2000 Neuchâtel, Switzerland
| | - Gaétan Glauser
- Neuchâtel Platform of Analytical Chemistry, University of Neuchâtel, 2000 Neuchâtel, Switzerland
| | - Katharina vom Dorp
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, D-53115 Bonn, Germany
| | - Luzia Guyer
- Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zurich, Switzerland
| | | | - Ramón Asis
- CIBICI, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, CC 5000, Córdoba, Argentina
| | - Amanda Pereira de Souza
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, 05508-900, São Paulo, Brazil
| | - Marcos Buckeridge
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, 05508-900, São Paulo, Brazil
| | - Diego Demarco
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, 05508-900, São Paulo, Brazil
| | - Cécile Bres
- INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, F-33140 Villenave d'Ornon, France
| | - Christophe Rothan
- INRA and Université de Bordeaux, UMR 1332 Biologie du Fruit et Pathologie, F-33140 Villenave d'Ornon, France
| | - Lázaro Eustáquio Pereira Peres
- Departamento de Ciências Biológicas, Escola Superior de Agricultura 'Luiz de Queiroz', Universidade de São Paulo, Av. Pádua Dias, 11, CP 09, 13418-900, Piracicaba, Brazil
| | - Stefan Hörtensteiner
- Institute of Plant Biology, University of Zurich, Zollikerstrasse 107, CH-8008 Zurich, Switzerland
| | - Félix Kessler
- Laboratory of Plant Physiology, University of Neuchâtel, 2000 Neuchâtel, Switzerland
| | - Peter Dörmann
- Institute of Molecular Physiology and Biotechnology of Plants, University of Bonn, D-53115 Bonn, Germany
| | - Fernando Carrari
- Instituto de Biotecnología, Instituto Nacional de Tecnología Agropecuaria and Consejo Nacional de Investigaciones Científicas y Técnicas, PO Box 25, B1712WAA, Castelar, Argentina
| | - Magdalena Rossi
- Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, 277, 05508-900, São Paulo, Brazil
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21
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Zhao H, Su T, Huo L, Wei H, Jiang Y, Xu L, Ma F. Unveiling the mechanism of melatonin impacts on maize seedling growth: sugar metabolism as a case. J Pineal Res 2015; 59:255-66. [PMID: 26122919 DOI: 10.1111/jpi.12258] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 06/26/2015] [Indexed: 12/21/2022]
Abstract
Melatonin regulates growth in many plants; however, the mechanism remains unclear. In this study, exogenous melatonin feeding resulted in both promotional (≤10 μm) and inhibitory (≥100 μm) effects on maize seedling growth. Initial analyses suggested positive correlations between the amount of melatonin and sucrose synthesis and hydrolysis-related gene expression, enzyme activities, and sucrose metabolites. However, assays of photosynthetic rate, hexokinase (HxK) activity, expression of photosynthetic marker genes, and HxK-related genes showed opposite effects under 10 μm (positive) and 100 μm (negative) melatonin treatments. Similarly, 10 μm melatonin accelerated starch catabolism at night, whereas 100 μm melatonin significantly decreased this process and led to starch accumulation in photosynthetic tissues. Furthermore, expression analysis of genes related to sucrose phloem loading resulted in a slight upregulation of sucrose transporters (SUT1 and SUT2) when seedlings were induced with 10 μm melatonin, while treatment with 100 μm melatonin resulted in significant downregulation of these sucrose transporter genes (SUT1 and SUT2), as well as tie-dyed2 (Tdy2) and sucrose export defective 1. Taken together, these results suggest that low doses of melatonin benefit maize seedling growth by promoting sugar metabolism, photosynthesis, and sucrose phloem loading. Conversely, high doses of melatonin inhibit seedling growth by inducing the excessive accumulation of sucrose, hexose and starch, suppressing photosynthesis and sucrose phloem loading.
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Affiliation(s)
- Hongbo Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Tao Su
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Liuqing Huo
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Hongbin Wei
- Centre for Organismal Studies Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Yang Jiang
- Centre for Organismal Studies Heidelberg, Heidelberg University, Heidelberg, Germany
| | - Lingfei Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, China
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Simancas B, Munné-Bosch S. Interplay between vitamin E and phosphorus availability in the control of longevity in Arabidopsis thaliana. ANNALS OF BOTANY 2015; 116:511-8. [PMID: 25808655 PMCID: PMC4577990 DOI: 10.1093/aob/mcv033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 01/07/2015] [Accepted: 02/06/2015] [Indexed: 05/22/2023]
Abstract
BACKGROUND AND AIMS Vitamin E helps to control the cellular redox state by reacting with singlet oxygen and preventing the propagation of lipid peroxidation in thylakoid membranes. Both plant ageing and phosphorus deficiency can trigger accumulation of reactive oxygen species, leading to damage to the photosynthetic apparatus. This study investigates how phosphorus availability and vitamin E interact in the control of plant longevity in the short-lived annual Arabidopsis thaliana. METHODS The responses of tocopherol cyclase (VTE1)- and γ-tocopherol methyltransferase (VTE4)-null mutants to various levels of phosphorus availability was compared with that of wild-type plants. Longevity (time from germination to rosette death) and the time taken to pass through different developmental stages were determined, and measurements were taken of photosynthetic efficiency, pigment concentration, lipid peroxidation, vitamin E content and jasmonate content. KEY RESULTS The vte1 mutant showed accelerated senescence under control conditions, excess phosphorus and mild phosphorus deficiency, suggesting a delaying, protective effect of α-tocopherol during plant senescence. However, under severe phosphorus deficiency the lack of α-tocopherol paradoxically increased longevity in the vte1 mutant, while senescence was accelerated in wild-type plants. Reduced photoprotection in vitamin E-deficient mutants led to increased levels of defence chemicals (as indicated by jasmonate levels) under severe phosphorus starvation in the vte4 mutant and under excess phosphorus and mild phosphorus starvation in the vte1 mutant, indicating a trade-off between the capacity for photoprotection and the activation of chemical defences (jasmonate accumulation). CONCLUSIONS Vitamin E increases plant longevity under control conditions and mild phosphorus starvation, but accelerates senescence under severe phosphorus limitation. Complex interactions are revealed between phosphorus availability, vitamin E and the potential to synthesize jasmonates, suggesting a trade-off between photoprotection and the activation of chemical defences in the plants.
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Affiliation(s)
- Bárbara Simancas
- Department of Plant Biology, Faculty of Biology, University of Barcelona, Av. Diagonal, 643, 08028 Barcelona, Spain
| | - Sergi Munné-Bosch
- Department of Plant Biology, Faculty of Biology, University of Barcelona, Av. Diagonal, 643, 08028 Barcelona, Spain
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