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Gioppato HA, Dornelas MC. Plant design gets its details: Modulating plant architecture by phase transitions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 163:1-14. [PMID: 33799013 DOI: 10.1016/j.plaphy.2021.03.046] [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: 07/28/2020] [Accepted: 03/20/2021] [Indexed: 06/12/2023]
Abstract
Plants evolved different strategies to better adapt to the environmental conditions in which they live: the control of their body architecture and the timing of phase change are two important processes that can improve their fitness. As they age, plants undergo two major phase changes (juvenile to adult and adult to reproductive) that are a response to environmental and endogenous signals. These phase transitions are accompanied by alterations in plant morphology and also by changes in physiology and the behavior of gene regulatory networks. Six main pathways involving environmental and endogenous cues that crosstalk with each other have been described as responsible for the control of plant phase transitions: the photoperiod pathway, the autonomous pathway, the vernalization pathway, the temperature pathway, the GA pathway, and the age pathway. However, studies have revealed that sugar is also involved in phase change and the control of branching behavior. In this review, we discuss recent advances in plant biology concerning the genetic and molecular mechanisms that allow plants to regulate phase transitions in response to the environment. We also propose connections between phase transition and plant architecture control.
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Affiliation(s)
- Helena Augusto Gioppato
- University of Campinas (UNICAMP), Biology Institute, Plant Biology Department, Rua Monteiro Lobato, 255 CEP 13, 083-862, Campinas, SP, Brazil
| | - Marcelo Carnier Dornelas
- University of Campinas (UNICAMP), Biology Institute, Plant Biology Department, Rua Monteiro Lobato, 255 CEP 13, 083-862, Campinas, SP, Brazil.
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102
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Hamilton CD, Steidl OR, MacIntyre AM, Hendrich CG, Allen C. Ralstonia solanacearum Depends on Catabolism of Myo-Inositol, Sucrose, and Trehalose for Virulence in an Infection Stage-Dependent Manner. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2021; 34:669-679. [PMID: 33487004 DOI: 10.1094/mpmi-10-20-0298-r] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The soilborne pathogen Ralstonia solanacearum causes a lethal bacterial wilt disease of tomato and many other crops by infecting host roots, then colonizing the water-transporting xylem vessels. Tomato xylem sap is nutritionally limiting but it does contain some carbon sources, including sucrose, trehalose, and myo-inositol. Transcriptomic analyses revealed that R. solanacearum expresses distinct catabolic pathways at low cell density (LCD) and high cell density (HCD). To investigate the links between bacterial catabolism, infection stage, and virulence, we measured in planta fitness of bacterial mutants lacking specific carbon catabolic pathways expressed at either LCD or HCD. We hypothesized that early in disease, during root infection, the bacterium depends on carbon sources catabolized at LCD, while HCD carbon sources are only required later in disease during stem colonization. A R. solanacearum ΔiolG mutant unable to use the LCD-catabolized nutrient myo-inositol was defective in tomato root colonization, but after it reached the stem this strain colonized and caused symptoms as well as wild type. In contrast, R. solanacearum mutants unable to use the HCD-catabolized nutrients sucrose (ΔscrA), trehalose (ΔtreA), or both (ΔscrA/treA), infected roots as well as wild-type R. solanacearum but were defective in colonization and competitive fitness in midstems and had reduced virulence. Further, xylem sap from tomato plants colonized by ΔscrA, ΔtreA, or ΔscrA/treA R. solanacearum mutants contained twice as much sucrose as sap from plants colonized by wild-type R. solanacearum. Together, these findings suggest that quorum sensing specifically adapts R. solanacearum metabolism for success in the different nutritional environments of plant roots and xylem sap.[Formula: see text] Copyright © 2021 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license.
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Affiliation(s)
- Corri D Hamilton
- Department of Plant Pathology University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, U.S.A
| | - Olivia R Steidl
- Department of Plant Pathology University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, U.S.A
| | - April M MacIntyre
- Department of Plant Pathology University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, U.S.A
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, U.S.A
| | - Connor G Hendrich
- Department of Plant Pathology University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, U.S.A
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, U.S.A
| | - Caitilyn Allen
- Department of Plant Pathology University of Wisconsin-Madison, 1630 Linden Drive, Madison, WI 53706, U.S.A
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103
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Beyond the Genetic Pathways, Flowering Regulation Complexity in Arabidopsis thaliana. Int J Mol Sci 2021; 22:ijms22115716. [PMID: 34071961 PMCID: PMC8198774 DOI: 10.3390/ijms22115716] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 02/06/2023] Open
Abstract
Flowering is one of the most critical developmental transitions in plants’ life. The irreversible change from the vegetative to the reproductive stage is strictly controlled to ensure the progeny’s success. In Arabidopsis thaliana, seven flowering genetic pathways have been described under specific growth conditions. However, the evidence condensed here suggest that these pathways are tightly interconnected in a complex multilevel regulatory network. In this review, we pursue an integrative approach emphasizing the molecular interactions among the flowering regulatory network components. We also consider that the same regulatory network prevents or induces flowering phase change in response to internal cues modulated by environmental signals. In this sense, we describe how during the vegetative phase of development it is essential to prevent the expression of flowering promoting genes until they are required. Then, we mention flowering regulation under suboptimal growing temperatures, such as those in autumn and winter. We next expose the requirement of endogenous signals in flowering, and finally, the acceleration of this transition by long-day photoperiod and temperature rise signals allowing A. thaliana to bloom in spring and summer seasons. With this approach, we aim to provide an initial systemic view to help the reader integrate this complex developmental process.
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104
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Yuan Z, Fan K, Wang Y, Tian L, Zhang C, Sun W, He H, Yu S. OsGRETCHENHAGEN3-2 modulates rice seed storability via accumulation of abscisic acid and protective substances. PLANT PHYSIOLOGY 2021; 186:469-482. [PMID: 33570603 PMCID: PMC8154041 DOI: 10.1093/plphys/kiab059] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 01/26/2021] [Indexed: 05/23/2023]
Abstract
Seed storability largely determines the vigor of seeds during storage and is significant in agriculture and ecology. However, the underlying genetic basis remains unclear. In the present study, we report the cloning and characterization of the rice (Oryza sativa) indole-3-acetic acid (IAA)-amido synthetase gene GRETCHEN HAGEN3-2 (OsGH3-2) associated with seed storability. OsGH3-2 was identified by performing a genome-wide association study in rice germplasms with linkage mapping in chromosome substitution segment lines, contributing to the wide variation of seed viability in the populations after long periods of storage and artificial ageing. OsGH3-2 was dominantly expressed in the developing seeds and catalyzed IAA conjugation to amino acids, forming inactive auxin. Transgenic overexpression, knockout, and knockdown experiments demonstrated that OsGH3-2 affected seed storability by regulating the accumulation level of abscisic acid (ABA). Overexpression of OsGH3-2 significantly decreased seed storability, while knockout or knockdown of the gene enhanced seed storability compared with the wild-type. OsGH3-2 acted as a negative regulator of seed storability by modulating many genes related to the ABA pathway and probably subsequently late embryogenesis-abundant proteins at the transcription level. These findings shed light on the molecular mechanisms underlying seed storability and will facilitate the improvement of seed vigor by genomic breeding and gene-editing approaches in rice.
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Affiliation(s)
- Zhiyang Yuan
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Kai Fan
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yuntong Wang
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Li Tian
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Chaopu Zhang
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenqiang Sun
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hanzi He
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Sibin Yu
- National Key Laboratory of Crop Genetic Improvement, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
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105
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Morcillo RJL, Manzanera M. The Effects of Plant-Associated Bacterial Exopolysaccharides on Plant Abiotic Stress Tolerance. Metabolites 2021; 11:337. [PMID: 34074032 PMCID: PMC8225083 DOI: 10.3390/metabo11060337] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 11/16/2022] Open
Abstract
Plant growth-promoting rhizobacteria (PGPR) are beneficial soil microorganisms that can stimulate plant growth and increase tolerance to biotic and abiotic stresses. Some PGPR are capable of secreting exopolysaccharides (EPS) to protect themselves and, consequently, their plant hosts against environmental fluctuations and other abiotic stresses such as drought, salinity, or heavy metal pollution. This review focuses on the enhancement of plant abiotic stress tolerance by bacterial EPS. We provide a comprehensive summary of the mechanisms through EPS to alleviate plant abiotic stress tolerance, including salinity, drought, temperature, and heavy metal toxicity. Finally, we discuss how these abiotic stresses may affect bacterial EPS production and its role during plant-microbe interactions.
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Affiliation(s)
- Rafael J L Morcillo
- Institute for Water Research, Department of Microbiology, University of Granada, 18003 Granada, Spain
| | - Maximino Manzanera
- Institute for Water Research, Department of Microbiology, University of Granada, 18003 Granada, Spain
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106
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Zhang M, Yu Z, Zeng D, Si C, Zhao C, Wang H, Li C, He C, Duan J. Transcriptome and Metabolome Reveal Salt-Stress Responses of Leaf Tissues from Dendrobium officinale. Biomolecules 2021; 11:736. [PMID: 34063498 PMCID: PMC8156352 DOI: 10.3390/biom11050736] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 12/23/2022] Open
Abstract
Dendrobium officinale Kimura et Migo is a precious traditional Chinese medicine. Despite D. officinale displaying a good salt-tolerance level, the yield and growth of D. officinale were impaired drastically by the increasing soil secondary salinization. The molecular mechanisms of D. officinale plants' adaptation to salt stress are not well documented. Therefore, in the present study, D. officinale plants were treated with 250 mM NaCl. Transcriptome analysis showed that salt stress significantly altered various metabolic pathways, including phenylalanine metabolism, flavonoid biosynthesis, and α-linolenic acid metabolism, and significantly upregulated the mRNA expression levels of DoAOC, DoAOS, DoLOX2S, DoMFP, and DoOPR involved in the jasmonic acid (JA) biosynthesis pathway, as well as rutin synthesis genes involved in the flavonoid synthesis pathway. In addition, metabolomics analysis showed that salt stress induced the accumulation of some compounds in D. officinale leaves, especially flavonoids, sugars, and alkaloids, which may play an important role in salt-stress responses of leaf tissues from D. officinale. Moreover, salt stress could trigger JA biosynthesis, and JA may act as a signal molecule that promotes flavonoid biosynthesis in D. officinale leaves. To sum up, D. officinale plants adapted to salt stress by enhancing the biosynthesis of secondary metabolites.
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Affiliation(s)
- Mingze Zhang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
- College of Biological Science and Agriculture, Qiannan Normal University for Nationalities, Duyun 558000, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhenming Yu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
| | - Danqi Zeng
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
- College of Biological Science and Agriculture, Qiannan Normal University for Nationalities, Duyun 558000, China
| | - Can Si
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
| | - Conghui Zhao
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
- College of Biological Science and Agriculture, Qiannan Normal University for Nationalities, Duyun 558000, China
| | - Haobin Wang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
| | - Chuanmao Li
- Guangzhou Keneng Cosmetic Scientific Research Co., Ltd., Guangzhou 510800, China;
| | - Chunmei He
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
| | - Jun Duan
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Gene Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; (M.Z.); (Z.Y.); (D.Z.); (C.S.); (C.Z.); (H.W.)
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107
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Pezzotti G, Asai T, Adachi T, Ohgitani E, Yamamoto T, Kanamura N, Boschetto F, Zhu W, Zanocco M, Marin E, Bal BS, McEntire BJ, Makimura K, Mazda O, Nishimura I. Antifungal activity of polymethyl methacrylate/Si 3N 4 composites against Candida albicans. Acta Biomater 2021; 126:259-276. [PMID: 33727194 DOI: 10.1016/j.actbio.2021.03.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 03/09/2021] [Accepted: 03/09/2021] [Indexed: 12/16/2022]
Abstract
Previous studies using gram-positive and -negative bacteria demonstrated that hydrolysis of silicon nitride (Si3N4) in aqueous suspensions elutes nitrogen and produces gaseous ammonia while buffering pH. According to immunochemistry assays, fluorescence imaging, and in situ Raman spectroscopy, we demonstrate here that the antipathogenic surface chemistry of Si3N4 can be extended to polymethylmethacrylate (PMMA) by compounding it with a minor fraction (~8 vol.%) of Si3N4 particles without any tangible loss in bulk properties. The hydrolytic products, which were eluted from partly exposed Si3N4 particles at the composite surface, exhibited fungicidal action against Candida albicans. Using a specific nitrative stress sensing dye and highly resolved fluorescence micrographs, we observed in situ congestion of peroxynitrite (ONOO-) radicals in the mitochondria of the Candida cells exposed to the PMMA/Si3N4 composite, while these radicals were absent in the mitochondria of identical cells exposed to monolithic PMMA. These in situ observations suggest that the surface chemistry of Si3N4 mimics the antifungal activity of macrophages, which concurrently produce NO radicals and superoxide anions (O2•-) resulting in the formation of candidacidal ONOO-. The fungicidal properties of PMMA/Si3N4 composites could be used in dental appliances to inhibit the uncontrolled growth of Candida albicans and ensuing candidiasis while being synergic with chemoprophylaxis. STATEMENT OF SIGNIFICANCE: In a follow-up of previous studies of gram-positive and gram-negative bacteria, we demonstrate here that the antipathogenic surface chemistry of Si3N4 could be extended to polymethylmethacrylate (PMMA) containing a minor fraction (~8 vol.%) of Si3N4 particles without tangible loss in bulk properties. Hydrolytic products eluted from Si3N4 particles at the composite surface exhibited fungicidal action against Candida albicans. Highly resolved fluorescence microscopy revealed congestion of peroxynitrite (ONOO-) radicals in the mitochondria of the Candida cells exposed to the PMMA/Si3N4 composite, while radicals were absent in the mitochondria of identical cells exposed to monolithic PMMA. The fungicidal properties of PMMA/Si3N4 composites could be used in dental appliances to inhibit uncontrolled growth of Candida albicans and ensuing candidiasis in synergy with chemoprophylaxis.
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108
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Bao Y, Yang N, Meng J, Wang D, Fu L, Wang J, Cang J. Adaptability of winter wheat Dongnongdongmai 1 (Triticum aestivum L.) to overwintering in alpine regions. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23:445-455. [PMID: 33075203 DOI: 10.1111/plb.13200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
Long winters led to a one-crop-a-year cultivation system until the winter wheat Dongnongdongmai 1 (Dn1) was successfully cultivated in northeast China. This crop variety is resistant to extremely low temperatures (-35 °C). To better understand the adaptability of winter wheat Dn1 to low temperatures, gas chromatography time-of-flight mass spectrometry (GC-TOF/MS) and metabolomics analysis was conducted on the tillering nodes of winter wheat during the overwintering period. Enzyme-regulating genes of the metabolic products were also quantitatively analysed. The metabolomic results for the tillering nodes in the overwintering period showed that disaccharides had a strong protective effect on winter wheat Dn1. Amino acid metabolism (i.e. proline, alanine and GABA) changed significantly throughout the whole wintering process, whereas organic fatty acid metabolism changed significantly only in the late stage of overwintering. This result indicates that the metabolites used by winter wheat Dn1 differ in different overwintering stages. The relationship between field temperature and metabolite changes in winter wheat Dn1 during overwintering periods is discussed, and disaccharides were identified as the osmotic stress regulators for winter wheat Dn1 during the overwintering process, as well as maintenance of the carbon and nitrogen balance by monosaccharides, amino acids and lipids for cold resistance.
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Affiliation(s)
- Y Bao
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - N Yang
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - J Meng
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - D Wang
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - L Fu
- College of Agriculture, Northeast Agricultural University, Harbin, China
| | - J Wang
- College of Life Science, Northeast Agricultural University, Harbin, China
| | - J Cang
- College of Life Science, Northeast Agricultural University, Harbin, China
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109
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Garcia CA, Gardner JG. Bacterial α-diglucoside metabolism: perspectives and potential for biotechnology and biomedicine. Appl Microbiol Biotechnol 2021; 105:4033-4052. [PMID: 33961116 PMCID: PMC8237927 DOI: 10.1007/s00253-021-11322-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/20/2021] [Accepted: 04/26/2021] [Indexed: 12/16/2022]
Abstract
In a competitive microbial environment, nutrient acquisition is a major contributor to the survival of any individual bacterial species, and the ability to access uncommon energy sources can provide a fitness advantage. One set of soluble carbohydrates that have attracted increased attention for use in biotechnology and biomedicine is the α-diglucosides. Maltose is the most well-studied member of this class; however, the remaining four less common α-diglucosides (trehalose, kojibiose, nigerose, and isomaltose) are increasingly used in processed food and fermented beverages. The consumption of trehalose has recently been shown to be a contributing factor in gut microbiome disease as certain pathogens are using α-diglucosides to outcompete native gut flora. Kojibiose and nigerose have also been examined as potential prebiotics and alternative sweeteners for a variety of foods. Compared to the study of maltose metabolism, our understanding of the synthesis and degradation of uncommon α-diglucosides is lacking, and several fundamental questions remain unanswered, particularly with regard to the regulation of bacterial metabolism for α-diglucosides. Therefore, this minireview attempts to provide a focused analysis of uncommon α-diglucoside metabolism in bacteria and suggests some future directions for this research area that could potentially accelerate biotechnology and biomedicine developments. KEY POINTS: • α-diglucosides are increasingly important but understudied bacterial metabolites. • Kinetically superior α-diglucoside enzymes require few amino acid substitutions. • In vivo studies are required to realize the biotechnology potential of α-diglucosides.
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Affiliation(s)
- Cecelia A Garcia
- Department of Biological Sciences, University of Maryland-Baltimore County, Baltimore, MD, USA
| | - Jeffrey G Gardner
- Department of Biological Sciences, University of Maryland-Baltimore County, Baltimore, MD, USA.
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110
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Ali S, Khan N. Delineation of mechanistic approaches employed by plant growth promoting microorganisms for improving drought stress tolerance in plants. Microbiol Res 2021; 249:126771. [PMID: 33930840 DOI: 10.1016/j.micres.2021.126771] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/01/2021] [Accepted: 04/17/2021] [Indexed: 11/24/2022]
Abstract
Drought stress is expected to increase in intensity, frequency, and duration in many parts of the world, with potential negative impacts on plant growth and productivity. The plants have evolved complex physiological and biochemical mechanisms to respond and adjust to water-deficient environments. The physiological and biochemical mechanisms associated with water-stress tolerance and water-use efficiency have been extensively studied. Besides these adaptive and mitigating strategies, the plant growth-promoting rhizobacteria (PGPR) play a significant role in alleviating plant drought stress. These beneficial microorganisms colonize the endo-rhizosphere/rhizosphere of plants and enhance drought tolerance. The common mechanism by which these microorganisms improve drought tolerance included the production of volatile compounds, phytohormones, siderophores, exopolysaccharides, 1-aminocyclopropane-1-carboxylate deaminase (ACC deaminase), accumulation of antioxidant, stress-induced metabolites such as osmotic solutes proline, alternation in leaf and root morphology and regulation of the stress-responsive genes. The PGPR is an easy and efficient alternative approach to genetic manipulation and crop enhancement practices because plant breeding and genetic modification are time-consuming and expensive processes for obtaining stress-tolerant varieties. In this review, we will elaborate on PGPR's mechanistic approaches in enhancing the plant stress tolerance to cope with the drought stress.
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Affiliation(s)
- Shahid Ali
- Plant Epigenetic and Development, Northeast Forestry University, Harbin, 150040, China
| | - Naeem Khan
- Department of Agronomy, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, 32611, USA.
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111
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Fan M, Miao F, Jia H, Li G, Powers C, Nagarajan R, Alderman PD, Carver BF, Ma Z, Yan L. O-linked N-acetylglucosamine transferase is involved in fine regulation of flowering time in winter wheat. Nat Commun 2021; 12:2303. [PMID: 33863881 PMCID: PMC8052332 DOI: 10.1038/s41467-021-22564-8] [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: 10/03/2020] [Accepted: 03/16/2021] [Indexed: 01/29/2023] Open
Abstract
Vernalization genes underlying dramatic differences in flowering time between spring wheat and winter wheat have been studied extensively, but little is known about genes that regulate subtler differences in flowering time among winter wheat cultivars, which account for approximately 75% of wheat grown worldwide. Here, we identify a gene encoding an O-linked N-acetylglucosamine (O-GlcNAc) transferase (OGT) that differentiates heading date between winter wheat cultivars Duster and Billings. We clone this TaOGT1 gene from a quantitative trait locus (QTL) for heading date in a mapping population derived from these two bread wheat cultivars and analyzed in various environments. Transgenic complementation analysis shows that constitutive overexpression of TaOGT1b from Billings accelerates the heading of transgenic Duster plants. TaOGT1 is able to transfer an O-GlcNAc group to wheat protein TaGRP2. Our findings establish important roles for TaOGT1 in winter wheat in adaptation to global warming in the future climate scenarios.
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Affiliation(s)
- Min Fan
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Jiangsu, Nanjing, PR China
| | - Fang Miao
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
- College of Life Science, Northwest A & F University, Yangling, Shaanxi, PR China
| | - Haiyan Jia
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Jiangsu, Nanjing, PR China
| | - Genqiao Li
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
- Wheat, Peanut and Other Field Crops Research Unit, USDA-ARS, Stillwater, OK, USA
| | - Carol Powers
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
| | - Ragupathi Nagarajan
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
| | - Phillip D Alderman
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
| | - Brett F Carver
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA
| | - Zhengqiang Ma
- Crop Genomics and Bioinformatics Center and National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Jiangsu, Nanjing, PR China
| | - Liuling Yan
- Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK, USA.
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112
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Ma Y, Vosátka M, Rensing C, Freitas H. Editorial: Advanced Microbial Biotechnologies for Sustainable Agriculture. Front Microbiol 2021; 12:634891. [PMID: 33841361 PMCID: PMC8027234 DOI: 10.3389/fmicb.2021.634891] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 03/03/2021] [Indexed: 12/03/2022] Open
Affiliation(s)
- Ying Ma
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Miroslav Vosátka
- Institute of Botany, Academy of Sciences of the Czech Republic, Pruhonice, Czechia.,Department of Experimental Plant Biology, Charles University, Faculty of Science, Prague, Czechia
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Helena Freitas
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
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Filippou P, Zarza X, Antoniou C, Obata T, Villarroel CA, Ganopoulos I, Harokopos V, Gohari G, Aidinis V, Madesis P, Christou A, Fernie AR, Tiburcio AF, Fotopoulos V. Systems biology reveals key tissue-specific metabolic and transcriptional signatures involved in the response of Medicago truncatula plant genotypes to salt stress. Comput Struct Biotechnol J 2021; 19:2133-2147. [PMID: 33995908 PMCID: PMC8085674 DOI: 10.1016/j.csbj.2021.04.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/05/2021] [Accepted: 04/05/2021] [Indexed: 11/24/2022] Open
Abstract
Τhe response of different Medicago truncatula genotypes to salt stress was examined. Systems biology revealed tissue-specific metabolic and transcriptional signatures. RFO metabolites linked with tolerance were identified. Several genes belonging to the TIR-NBS-LRR class were linked with hyper-sensitivity.
Salt stress is an important factor limiting plant productivity by affecting plant physiology and metabolism. To explore salt tolerance adaptive mechanisms in the model legume Medicago truncatula, we used three genotypes with differential salt-sensitivity: TN6.18 (highly sensitive), Jemalong A17 (moderately sensitive), and TN1.11 (tolerant). Cellular damage was monitored in roots and leaves 48 h after 200 mM NaCl treatment by measuring lipid peroxidation, nitric oxide, and hydrogen peroxide contents, further supported by leaf stomatal conductance and chlorophyll readings. The salt-tolerant genotype TN1.11 displayed the lowest level of oxidative damage, in contrast to the salt sensitive TN6.18, which showed the highest responses. Metabolite profiling was employed to explore the differential genotype-related responses to stress at the molecular level. The metabolic data in the salt tolerant TN1.11 roots revealed an accumulation of metabolites related to the raffinose pathway. To further investigate the sensitivity to salinity, global transcriptomic profiling using microarray analysis was carried out on the salt-stressed sensitive genotypes. In TN6.18, the transcriptomic analysis identified a lower expression of many genes related to stress signalling, not previously linked to salinity, and corresponding to the TIR-NBS-LRR gene class. Overall, this global approach contributes to gaining significant new insights into the complexity of stress adaptive mechanisms and to the identification of potential targets for crop improvement.
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Affiliation(s)
- Panagiota Filippou
- Department of Agricultural Sciences, Biotechnology, and Food Science, Cyprus University of Technology, Limassol, Cyprus
| | - Xavier Zarza
- Department of Natural Products, Plant Biology and Soil Science, University of Barcelona, Barcelona, Spain
| | - Chrystalla Antoniou
- Department of Agricultural Sciences, Biotechnology, and Food Science, Cyprus University of Technology, Limassol, Cyprus
| | - Toshihiro Obata
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | | | - Ioannis Ganopoulos
- Hellenic Agricultural Organization DEMETER, Institute of Plant Breeding and Genetic Resources- IPB&GR, Thessaloniki, Greece
| | - Vaggelis Harokopos
- Institute of Immunology, Biomedical Sciences Research Center Alexander Fleming, 34 Fleming Street, 16672 Athens, Greece
| | - Gholamreza Gohari
- Department of Horticultural Sciences, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
| | - Vassilis Aidinis
- Institute of Immunology, Biomedical Sciences Research Center Alexander Fleming, 34 Fleming Street, 16672 Athens, Greece
| | | | | | - Alisdair R. Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, 14476 Potsdam-Golm, Germany
| | - Antonio F. Tiburcio
- Department of Natural Products, Plant Biology and Soil Science, University of Barcelona, Barcelona, Spain
| | - Vasileios Fotopoulos
- Department of Agricultural Sciences, Biotechnology, and Food Science, Cyprus University of Technology, Limassol, Cyprus
- Corresponding author.
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114
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Nuñez-Muñoz L, Vargas-Hernández B, Hinojosa-Moya J, Ruiz-Medrano R, Xoconostle-Cázares B. Plant drought tolerance provided through genome editing of the trehalase gene. PLANT SIGNALING & BEHAVIOR 2021; 16:1877005. [PMID: 33570447 PMCID: PMC7971296 DOI: 10.1080/15592324.2021.1877005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 05/25/2023]
Abstract
Drought is one of the main abiotic factors that affect agricultural productivity, jeopardizing food security. Modern biotechnology is a useful tool for the generation of stress-tolerant crops, but its release and field-testing involves complex regulatory frameworks. However, gene editing technology mediated by the CRISPR/Cas9 system is a suitable strategy for plant breeding, which can lead to precise and specific modifications in the plant genome. The aim of the present work is to produce drought-tolerant plant varieties by modifying the trehalase gene. Furthermore, a new vector platform was developed to edit monocot and dicot genomes, by modifying vectors adding a streptomycin resistance marker for use with the hypervirulent Agrobacterium tumefaciens AGL1 strain. The gRNA design was based on the trehalase sequence in several species of the genus Selaginella that show drought tolerance. Arabidopsis thaliana carrying editions in the trehalase substrate-binding domain showed a higher tolerance to drought stress. In addition, a transient transformation system for gene editing in maize leaves was characterized.
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Affiliation(s)
- Leandro Nuñez-Muñoz
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
| | - Brenda Vargas-Hernández
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
| | - Jesús Hinojosa-Moya
- Facultad de Ingeniería Química, Benemérita Universidad Autónoma de Puebla, Puebla, México
| | - Roberto Ruiz-Medrano
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
| | - Beatriz Xoconostle-Cázares
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CDMX, México
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Fichtner F, Dissanayake IM, Lacombe B, Barbier F. Sugar and Nitrate Sensing: A Multi-Billion-Year Story. TRENDS IN PLANT SCIENCE 2021; 26:352-374. [PMID: 33281060 DOI: 10.1016/j.tplants.2020.11.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/23/2020] [Accepted: 11/04/2020] [Indexed: 05/03/2023]
Abstract
Sugars and nitrate play a major role in providing carbon and nitrogen in plants. Understanding how plants sense these nutrients is crucial, most notably for crop improvement. The mechanisms underlying sugar and nitrate sensing are complex and involve moonlighting proteins such as the nitrate transporter NRT1.1/NFP6.3 or the glycolytic enzyme HXK1. Major components of nutrient signaling, such as SnRK1, TOR, and HXK1, are relatively well conserved across eukaryotes, and the diversification of components such as the NRT1 family and the SWEET sugar transporters correlates with plant terrestrialization. In plants, Tre6P plays a hormone-like role in plant development. In addition, nutrient signaling has evolved to interact with the more recent hormone signaling, allowing fine-tuning of physiological and developmental responses.
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Affiliation(s)
- Franziska Fichtner
- School of Biological Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia
| | | | - Benoit Lacombe
- Biochimie et Physiologie Moléculaire des Plantes (BPMP), Institut National de Recherche pour l'Agriculture, l'Alimentation, et l'Environnement (INRAE), Centre National de la Recherche Scientifique (CNRS), Montpellier SupAgro, University of Montpellier, Montpellier, France
| | - Francois Barbier
- School of Biological Sciences, The University of Queensland, St. Lucia, QLD 4072, Australia.
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Kaur H, Manna M, Thakur T, Gautam V, Salvi P. Imperative role of sugar signaling and transport during drought stress responses in plants. PHYSIOLOGIA PLANTARUM 2021; 171:833-848. [PMID: 33583052 DOI: 10.1111/ppl.13364] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 01/31/2021] [Accepted: 02/06/2021] [Indexed: 05/27/2023]
Abstract
Cellular sugar status is essentially maintained during normal growth conditions but is impacted negatively during various environmental perturbations. Drought presents one such unfavorable environmental cue that hampers the photosynthetic fixation of carbon into sugars and affects their transport by lowering the cellular osmotic potential. The transport of cellular sugar is facilitated by a specific set of proteins known as sugar transporters. These transporter proteins are the key determinant of influx/ efflux of various sugars and their metabolite intermediates that support the plant growth and developmental process. Abiotic stress and especially drought stress-mediated injury results in reprogramming of sugar distribution across the cellular and subcellular compartments. Here, we have reviewed the imperative role of sugar accumulation, signaling, and transport under typical and atypical stressful environments. We have discussed the physiological effects of drought on sugar accumulation and transport through different transporter proteins involved in monosaccharide and disaccharide sugar transport. Further, we have illustrated sugar-mediated signaling and regulation of sugar transporter proteins along with the overall crosstalk of this signaling with the phytohormone module of abiotic stress response under osmotic stress. Overall, the present review highlights the critical role of sugar transport, distribution and signaling in plants under drought stress conditions.
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Affiliation(s)
- Harmeet Kaur
- Plant Molecular Biology, ICAR-National Institute for Plant Biotechnology, New Delhi, India
| | - Mrinalini Manna
- Plant Molecular Biology, National Institute of Plant Genome Research, New Delhi, India
| | - Tanika Thakur
- Agriculture Biotechnology Department, National Agri-Food Biotechnology Institute, Mohali, India
| | - Vibhav Gautam
- Centre of Experimental Medicine and Surgery, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Prafull Salvi
- Agriculture Biotechnology Department, National Agri-Food Biotechnology Institute, Mohali, India
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117
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Mijailovic N, Nesler A, Perazzolli M, Aït Barka E, Aziz A. Rare Sugars: Recent Advances and Their Potential Role in Sustainable Crop Protection. Molecules 2021; 26:molecules26061720. [PMID: 33808719 PMCID: PMC8003523 DOI: 10.3390/molecules26061720] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/15/2021] [Accepted: 03/16/2021] [Indexed: 02/06/2023] Open
Abstract
Rare sugars are monosaccharides with a limited availability in the nature and almost unknown biological functions. The use of industrial enzymatic and microbial processes greatly reduced their production costs, making research on these molecules more accessible. Since then, the number of studies on their medical/clinical applications grew and rare sugars emerged as potential candidates to replace conventional sugars in human nutrition thanks to their beneficial health effects. More recently, the potential use of rare sugars in agriculture was also highlighted. However, overviews and critical evaluations on this topic are missing. This review aims to provide the current knowledge about the effects of rare sugars on the organisms of the farming ecosystem, with an emphasis on their mode of action and practical use as an innovative tool for sustainable agriculture. Some rare sugars can impact the plant growth and immune responses by affecting metabolic homeostasis and the hormonal signaling pathways. These properties could be used for the development of new herbicides, plant growth regulators and resistance inducers. Other rare sugars also showed antinutritional properties on some phytopathogens and biocidal activity against some plant pests, highlighting their promising potential for the development of new sustainable pesticides. Their low risk for human health also makes them safe and ecofriendly alternatives to agrochemicals.
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Affiliation(s)
- Nikola Mijailovic
- Induced Resistance and Plant Bioprotection, USC RIBP 1488, University of Reims, UFR Sciences, CEDEX 02, 51687 Reims, France; (N.M.); (E.A.B.)
- Bi-PA nv, Londerzee l1840, Belgium;
| | | | - Michele Perazzolli
- Department of Sustainable Agro-Ecosystems and Bioresources, Research and Innovation Centre, Fondazione Edmund Mach, 38010 San Michele all’Adige, Italy;
- Center Agriculture Food Environment (C3A), University of Trento, 38098 San Michele all’Adige, Italy
| | - Essaid Aït Barka
- Induced Resistance and Plant Bioprotection, USC RIBP 1488, University of Reims, UFR Sciences, CEDEX 02, 51687 Reims, France; (N.M.); (E.A.B.)
| | - Aziz Aziz
- Induced Resistance and Plant Bioprotection, USC RIBP 1488, University of Reims, UFR Sciences, CEDEX 02, 51687 Reims, France; (N.M.); (E.A.B.)
- Correspondence: ; Tel.: +33-326-918-525
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Zhao X, Chen Y, Zhang L, Li Z, Wu X, Chen J, Wang F. Molecular cloning and biochemical characterization of a trehalose synthase from Myxococcus sp. strain V11. Protein Expr Purif 2021; 183:105865. [PMID: 33675938 DOI: 10.1016/j.pep.2021.105865] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 02/28/2021] [Accepted: 03/01/2021] [Indexed: 11/30/2022]
Abstract
The tresI gene of Myxococcus sp. strain V11 was cloned, and found to encode a trehalose synthase comprising 551 amino acids. The deduced molecular weight of the encoded TreS I protein 64.7 kDa and the isoelectric point (pI) was predicted to be 5.6. The catalytic cleft consists of the Asp202-Glu244-Asp310 catalytic triad and additional conserved residues. The recombinant (His)6-tag enzyme was expressed in Escherichia coli BL21(DE3) and purified by Ni2+-affinity chromatography, resulting in a specific activity of up to 172.7 U/mg. TLC and HPLC results confirmed that rTreS I can convert maltose into trehalose, with a yield of 61%. The KM and Vmax values of recombinant TreS I for maltose were 0.62 mM and 25.5 mM min-1 mg-1 protein, respectively. TreS I was optimally active at 35° and stable at temperatures of <25 °C. TreS I was stable within a narrow range of pH values, from 6.0 to 7.0. The enzymatic activity was slightly stimulated by Mg2+ and strongly inhibited by Fe3+, Co2+ and Cu2+. TreS I was also strongly inhibited by SDS and weakly by EDTA and TritonX-100.
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Affiliation(s)
- Xiaoyan Zhao
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Yunda Chen
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Lixia Zhang
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Zhimin Li
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, PR China
| | - Xiaoyu Wu
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, PR China; Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits and Vegetables in Jiangxi Province, Nanchang, 330045, PR China
| | - Jinyin Chen
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, PR China; Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits and Vegetables in Jiangxi Province, Nanchang, 330045, PR China
| | - Fei Wang
- College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang, 330045, PR China; Collaborative Innovation Center of Postharvest Key Technology and Quality Safety of Fruits and Vegetables in Jiangxi Province, Nanchang, 330045, PR China.
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119
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Zhang S, Wang H, Luo J, Yu W, Xiao Y, Peng F. Peach PpSnRK1α interacts with bZIP11 and maintains trehalose balance in plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 160:377-385. [PMID: 33550178 DOI: 10.1016/j.plaphy.2021.01.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
The nonreducing disaccharide trehalose is widespread in nature. It plays a very important role in plant growth and development. In plants, trehalose is present in trace amounts. High concentration of trehalose disrupts energy balance and inhibits normal growth and development. Studies have shown that high levels of trehalose and trehalose-6-phosphate (T6P), the metabolic precursor of trehalose, inhibit sucrose non-fermenting-1-related protein kinase1 (SnRK1) activity, which affect plant growth and development. However, the role of SnRK1, the energy balance center, in the regulation of trehalose metabolism in plants is unknown. In this study, exogenous trehalose at higher concentrations inhibited the expression of SnRK1 genes, especially PpSnRK1α in peach (Prunus persica) seedlings. This change in gene expression was dependent on trehalose concentration. Furthermore, overexpression of peach PpSnRK1α in Arabidopsis thaliana significantly promoted trehalase activity, reduced T6P content, and suppressed the trehalose synthesis related genes (TPSs, TPPB) expression, promoted the trehalose metabolism of gene expression (TRE1), in addition the transgenic plants alleviated photosynthetic product distribution imbalance (aboveground and underground parts), and enhanced root growth. Yeast two-hybrid and bimolecular fluorescence assays revealed the interaction between PpSnRK1α and peach basic domain leucine zipper transcription factor 11 (PpbZIP11), a key transcription factor of trehalose metabolism, in the nucleus. To summarize, PpSnRK1α overexpression improved bZIP11 transcriptional activity and regulated trehalose metabolism to protect the plants against trehalose-induced damage. This study preliminarily explained the mechanism of SnRK1 regulating trehalose metabolism balance in plants, which laid a foundation for further understanding of energy metabolism and function of SnRK1 in plants.
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Affiliation(s)
- Shuhui Zhang
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Hui Wang
- College of Horticulture, Northwest A & F University, Yang Ling, Shaanxi, 712100, China
| | - Jingjing Luo
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Wenying Yu
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China
| | - Yuansong Xiao
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China.
| | - Futian Peng
- State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an, China.
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120
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Xu Z, Chen X, Lu X, Zhao B, Yang Y, Liu J. Integrative analysis of transcriptome and metabolome reveal mechanism of tolerance to salt stress in oat (Avena sativa L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 160:315-328. [PMID: 33545609 DOI: 10.1016/j.plaphy.2021.01.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
Soil salinity is among the crucial factors that impact on crop productivity, including oat (Avena sativa L.). Herein, we used two distinct oat cultivars with varied salt tolerance levels to unravel adaptive responses to salt stress by metabolomic and transcriptomic characterization. Metabolomic profiling revealed 201 metabolites, including saccharides, amino acids, organic acids, and secondary metabolites. The levels of most saccharides and amino acids were elevated in Baiyan 2 (BY2) as well as in Baiyan 5 (BY5) exposed to salt stress. In the tolerant cultivar BY2 exposed to 150 mM NaCl, concentrations of most of the metabolites increased significantly, with sucrose increased by 38.34-fold, Sophorose increased by 314.15-fold and Isomaltose 2 increased by 25.76-fold. In the sensitive cultivar BY5, the concentrations of most metabolites increased after the plant was exposed to 150 mM NaCl but decreased after the plant was exposed to 300 mM NaCl. Transcriptomic analysis revealed that gene expressions in BY5 were significantly affected under exposure to 300 mM NaCl (34040 genes up-regulated and 14757 genes down-regulated). Assessment of metabolic pathways as well as KEGG enrichment revealed that salt stress interferes with the biosynthesis of two oat cultivars, including capacity expenditure and sugar metabolism. Most of the BY2 genes enhanced energy consumption (for example, glycolysis) and biosynthesis (for instance, starch and sugar metabolism) under salt stress. In contrast, genes in BY5 were found to be down-regulated, leading to the inhibition of energy consumption and biosynthesis, which may also be attributed to salt sensitivity in BY5. In addition, the modified Na+/K+ transporter genes expression is associated with the predominant ionic responses in BY2, which leads low concentration of Na+ and high K+ when exposed to high salt situations. These findings suggest that the varied defensive capacities of these two oat cultivars in response to salt stress are due to their variations in energy-expenditure strategy, synthesis of energy substances and ion transport in roots. Our present study offers a crucial reference for oat cultivation under saline soil.
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Affiliation(s)
- Zhongshan Xu
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China; Cereal Engineering Technology Research Center, Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, 010019, China; National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, Inner Mongolia, 010019, China
| | - Xiaojing Chen
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China; Cereal Engineering Technology Research Center, Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, 010019, China; National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, Inner Mongolia, 010019, China
| | - Xiaoping Lu
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China
| | - Baoping Zhao
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China; Cereal Engineering Technology Research Center, Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, 010019, China; National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, Inner Mongolia, 010019, China
| | - Yanming Yang
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China; Cereal Engineering Technology Research Center, Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, 010019, China; National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, Inner Mongolia, 010019, China
| | - Jinghui Liu
- Cereal Industry Collaborative Innovation Center, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, 010019, China; Cereal Engineering Technology Research Center, Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, 010019, China; National Outstanding Talents in Agricultural Research and Their Innovative Teams, Hohhot, Inner Mongolia, 010019, China.
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121
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Liu Z, Shi Y, Xue Y, Wang X, Huang Z, Xue J, Zhang X. Non-structural carbohydrates coordinate tree peony flowering both as energy substrates and as sugar signaling triggers, with the bracts playing an essential role. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 159:80-88. [PMID: 33341082 DOI: 10.1016/j.plaphy.2020.12.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 12/12/2020] [Indexed: 05/15/2023]
Abstract
The natural fluorescence of tree peony is short. Forcing culture, mainly by defoliation and gibberellin (GA) treatment, is frequently used for its industrial production. We previously found forcing culture to be coordinated by non-structural carbohydrates (NSCs). Herein, we further revealed the specific role of NSCs during this process. We observed that both defoliation and GA treatment increased the photosynthesis in the bracts, and defoliation had a greater effect on NSC assimilation. We further determined the NSC content and PsSWEETs expression in the bracts, and the results indicated that GA may contribute more to NSC allocation by inducing PsSWEET7. Furthermore, we determined the trehalose-6-phosphate (T6P) content and sugar signaling-related gene (PsTPS1, PsSnRK1, and PsHXK1) expression in both the petals and bracts and found that both defoliation and GA treatment induced T6P levels as well as PsTPS1 expression in both tissues. This indicated that the sugar signaling pathway may also be involved in NSC-coordinated tree peony flowering. In particular, PsSnRK1 was more rapidly induced in the bracts (as an energy shortage response) in the control plants and was completely prohibited by defoliation and GA treatment, indicating the key role of the bracts in sugar signaling. In conclusion, NSCs induced tree peony flowering both as an energy substrate and sugar signaling trigger, with the bracts playing an essential role. These results may provide further evidence on the mechanism of NSC-coordinated flower opening in tree peony under forcing culture conditions, which may also provide a foundation for improving this technology.
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Affiliation(s)
- Zhiyong Liu
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
| | - Yantong Shi
- Beijing Agricultural Technology Extension Station, Beijing, 100029, China.
| | - Yuqian Xue
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
| | - Xiaoping Wang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
| | - Zhen Huang
- Zaozhuang Vocational College, Shandong, 277800, China.
| | - Jingqi Xue
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
| | - Xiuxin Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Ministry of Agriculture and Rural Affairs, Beijing, 100081, China.
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122
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Magaña Ugarte R, Escudero A, Gavilán RG. Assessing the Role of Selected Osmolytes in Mediterranean High-Mountain Specialists. Front Ecol Evol 2021. [DOI: 10.3389/fevo.2021.576122] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Despite the constraining weight of summer drought over plant life which distinguishes Mediterranean high-mountains, and its anticipated exacerbation under the current climate crisis, there is still little knowledge of the underlying drought-endurance mechanisms in Mediterranean high-mountain species, such as osmolyte accumulation. To fill this gap, we studied the role of two of the most frequent osmoregulators in plants, proline and osmotically active carbohydrates (OAC), as pointers of the drought-stress response in seven high-mountain plant species representative of the high-mountain plant communities in Central Spain, along an elevation gradient. Overall, our results are consistent with the escalation of summer drought and suggest the involvement of osmolytes to sustain plant activity in these specialists during the growing season. Proline content showed a steadily increasing pattern in line with the seasonal aggravation of summer drought. The significant rise in mean proline in most species, coinciding with the periods with the greatest decline in soil water content, suggests the recurrent role of proline in the drought-stress response in the studied specialists. The lack of significant differences between elevations and the minimal seasonal variations in the OAC content suggest a fixed OAC content independent of functional type to sustain metabolic functions under summer drought. Moreover, these findings allow inferring the action of both OAC and proline as osmoregulators, allowing to support plant functions in these specialists under atypically dry conditions. Overall, our findings are consistent with proline as a major osmoprotectant strategy over OAC buildup in these specialists, which may be related to an adaptation strategy associated with the briefness of the growing season and the incidence of less favorable conditions in Mediterranean high-mountains.
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Convergence and Divergence of Sugar and Cytokinin Signaling in Plant Development. Int J Mol Sci 2021; 22:ijms22031282. [PMID: 33525430 PMCID: PMC7865218 DOI: 10.3390/ijms22031282] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/19/2021] [Accepted: 01/24/2021] [Indexed: 02/06/2023] Open
Abstract
Plants adjust their growth and development through a sophisticated regulatory system integrating endogenous and exogenous cues. Many of them rely on intricate crosstalk between nutrients and hormones, an effective way of coupling nutritional and developmental information and ensuring plant survival. Sugars in their different forms such as sucrose, glucose, fructose and trehalose-6-P and the hormone family of cytokinins (CKs) are major regulators of the shoot and root functioning throughout the plant life cycle. While their individual roles have been extensively investigated, their combined effects have unexpectedly received little attention, resulting in many gaps in current knowledge. The present review provides an overview of the relationship between sugars and CKs signaling in the main developmental transition during the plant lifecycle, including seed development, germination, seedling establishment, root and shoot branching, leaf senescence, and flowering. These new insights highlight the diversity and the complexity of the crosstalk between sugars and CKs and raise several questions that will open onto further investigations of these regulation networks orchestrating plant growth and development.
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124
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Omari Alzahrani F. Metabolic engineering of osmoprotectants to elucidate the mechanism(s) of salt stress tolerance in crop plants. PLANTA 2021; 253:24. [PMID: 33403449 DOI: 10.1007/s00425-020-03550-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 12/22/2020] [Indexed: 05/08/2023]
Abstract
Previous studies on engineering osmoprotectant metabolic pathway genes focused on the performance of transgenic plants under salt stress conditions rather than elucidating the underlying mechanism(s), and hence, the mechanism(s) remain(s) unclear. Salt stress negatively impacts agricultural crop yields. Hence, to meet future food demands, it is essential to generate salt stress-resistant varieties. Although traditional breeding has improved salt tolerance in several crops, this approach remains inadequate due to the low genetic diversity of certain important crop cultivars. Genetic engineering is used to introduce preferred gene(s) from any genetic reserve or to modify the expression of the existing gene(s) responsible for salt stress response or tolerance, thereby leading to improved salt tolerance in plants. Although plants naturally produce osmoprotectants as an adaptive mechanism for salt stress tolerance, they offer only partial protection. Recently, progress has been made in the identification and characterization of genes involved in the biosynthetic pathways of osmoprotectants. Exogenous application of these osmoprotectants, and genetic engineering of enzymes in their biosynthetic pathways, have been reported to enhance salt tolerance in different plants. However, no clear mechanistic model exists to explain how osmoprotectant accumulation in transgenic plants confers salt tolerance. This review critically examines the results obtained thus far for elucidating the underlying mechanisms of osmoprotectants for improved salt tolerance, and thus, crop yield stability under salt stress conditions, through the genetic engineering of trehalose, glycinebetaine, and proline metabolic pathway genes.
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Affiliation(s)
- Fatima Omari Alzahrani
- Department of Biology, Faculty of Science, Albaha Province, Albaha University, Albaha, 65527, Saudi Arabia.
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Han R, Truco MJ, Lavelle DO, Michelmore RW. A Composite Analysis of Flowering Time Regulation in Lettuce. FRONTIERS IN PLANT SCIENCE 2021; 12:632708. [PMID: 33763095 PMCID: PMC7982828 DOI: 10.3389/fpls.2021.632708] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 02/16/2021] [Indexed: 05/08/2023]
Abstract
Plants undergo profound physiological changes when transitioning from vegetative to reproductive growth. These changes affect crop production, as in the case of leafy vegetables. Lettuce is one of the most valuable leafy vegetable crops in the world. Past genetic studies have identified multiple quantitative trait loci (QTLs) that affect the timing of the floral transition in lettuce. Extensive functional molecular studies in the model organism Arabidopsis provide the opportunity to transfer knowledge to lettuce to explore the mechanisms through which genetic variations translate into changes in flowering time. In this review, we integrated results from past genetic and molecular studies for flowering time in lettuce with orthology and functional inference from Arabidopsis. This summarizes the basis for all known genetic variation underlying the phenotypic diversity of flowering time in lettuce and how the genetics of flowering time in lettuce projects onto the established pathways controlling flowering time in plants. This comprehensive overview reveals patterns across experiments as well as areas in need of further study. Our review also represents a resource for developing cultivars with delayed flowering time.
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Affiliation(s)
- Rongkui Han
- The Genome and Biomedical Sciences Facility, University of California, Davis, Davis, CA, United States
- Plant Biology Graduate Group, University of California, Davis, Davis, CA, United States
| | - Maria José Truco
- The Genome and Biomedical Sciences Facility, University of California, Davis, Davis, CA, United States
| | - Dean O. Lavelle
- The Genome and Biomedical Sciences Facility, University of California, Davis, Davis, CA, United States
| | - Richard W. Michelmore
- The Genome and Biomedical Sciences Facility, University of California, Davis, Davis, CA, United States
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
- *Correspondence: Richard W. Michelmore,
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Samarina L, Matskiv A, Simonyan T, Koninskaya N, Malyarovskaya V, Gvasaliya M, Malyukova L, Tsaturyan G, Mytdyeva A, Martinez-Montero ME, Choudhary R, Ryndin A. Biochemical and Genetic Responses of Tea ( Camellia sinensis (L.) Kuntze) Microplants under Mannitol-Induced Osmotic Stress In Vitro. PLANTS 2020; 9:plants9121795. [PMID: 33348920 PMCID: PMC7766420 DOI: 10.3390/plants9121795] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 12/14/2022]
Abstract
Osmotic stress is a major factor reducing the growth and yield of many horticultural crops worldwide. To reveal reliable markers of tolerant genotypes, we need a comprehensive understanding of the responsive mechanisms in crops. In vitro stress induction can be an efficient tool to study the mechanisms of responses in plants to help gain a better understanding of the physiological and genetic responses of plant tissues against each stress factor. In the present study, the osmotic stress was induced by addition of mannitol into the culture media to reveal biochemical and genetic responses of tea microplants. The contents of proline, threonine, epigallocatechin, and epigallocatechin gallate were increased in leaves during mannitol treatment. The expression level of several genes, namely DHN2, LOX1, LOX6, BAM, SUS1, TPS11, RS1, RS2, and SnRK1.3, was elevated by 2–10 times under mannitol-induced osmotic stress, while the expression of many other stress-related genes was not changed significantly. Surprisingly, down-regulation of the following genes, viz. bHLH12, bHLH7, bHLH21, bHLH43, CBF1, WRKY2, SWEET1, SWEET2, SWEET3, INV5, and LOX7, was observed. During this study, two major groups of highly correlated genes were observed. The first group included seven genes, namely CBF1, DHN3, HXK2,SnRK1.1, SPS, SWEET3, and SWEET1. The second group comprised eight genes, viz. DHN2, SnRK1.3, HXK3, RS1, RS2,LOX6, SUS4, and BAM5. A high level of correlation indicates the high strength connection of the genes which can be co-expressed or can be linked to the joint regulons. The present study demonstrates that tea plants develop several adaptations to cope under osmotic stress in vitro; however, some important stress-related genes were silent or downregulated in microplants.
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Affiliation(s)
- Lidiia Samarina
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
- Correspondence: ; Tel.: +79-66-7709038
| | - Alexandra Matskiv
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Taisiya Simonyan
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Natalia Koninskaya
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Valentina Malyarovskaya
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Maya Gvasaliya
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Lyudmila Malyukova
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Gregory Tsaturyan
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Alfiya Mytdyeva
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
| | - Marcos Edel Martinez-Montero
- Department of Plant Breeding and Plant Conservation, Bioplantas Center, University of Ciego de Avila, Ciego de Avila 65200, Cuba;
| | - Ravish Choudhary
- Division of Seed Science and Technology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India;
| | - Alexey Ryndin
- Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences, Sochi 354002, Russia; (A.M.); (T.S.); (N.K.); (V.M.); (M.G.); (L.M.); (G.T.); (A.M.); (A.R.)
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Zhao Y, Wang XQ. The hot issue: TOR signalling network in plants. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 48:1-7. [PMID: 32905758 DOI: 10.1071/fp20071] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 08/10/2020] [Indexed: 06/11/2023]
Abstract
The target of rapamycin (TOR) signalling network plays a pivotal role in regulating sugar metabolism and life-span in yeast, plants and mammals, in which TOR functions as a crucial protein. In plants, the TOR complex comprises TOR, RAPTOR (regulatory-associated protein of TOR) and LST8 (lethal with SEC13 protein 8). Factors like light, auxin, glucose, sucrose and amino acid can activate TOR protein as upstream signals to further phosphorylate downstream factors of TOR which promote cell proliferation and growth in plants. In this review, we analyse the TOR signalling network in plants and discuss the relationship between glucose and TOR, as well as the dynamic balance between TOR and sucrose-non-fermenting-related protein kinases (SnRKs). Given that 63 novel TOR-regulated proteins have been identified in previous studies, we also believe there are many unknown functions of TOR that need to be further investigated.
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Affiliation(s)
- Ying Zhao
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China
| | - Xiu-Qin Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, PR China; and Corresponding author.
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Salt Stress Response of Sulfolobus acidocaldarius Involves Complex Trehalose Metabolism Utilizing a Novel Trehalose-6-Phosphate Synthase (TPS)/Trehalose-6-Phosphate Phosphatase (TPP) Pathway. Appl Environ Microbiol 2020; 86:AEM.01565-20. [PMID: 33008820 PMCID: PMC7688234 DOI: 10.1128/aem.01565-20] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 09/17/2020] [Indexed: 01/02/2023] Open
Abstract
The crenarchaeon Sulfolobus acidocaldarius has been described to synthesize trehalose via the maltooligosyltrehalose synthase (TreY) and maltooligosyltrehalose trehalohydrolase (TreZ) pathway, and the trehalose glycosyltransferring synthase (TreT) pathway has been predicted. Deletion mutant analysis of strains with single and double deletions of ΔtreY and ΔtreT in S. acidocaldarius revealed that in addition to these two pathways, a third, novel trehalose biosynthesis pathway is operative in vivo: the trehalose-6-phosphate (T6P) synthase/T6P phosphatase (TPS/TPP) pathway. In contrast to known TPS proteins, which belong to the GT20 family, the S. acidocaldarius TPS belongs to the GT4 family, establishing a new function within this group of enzymes. This novel GT4-like TPS was found to be present mainly in the Sulfolobales The ΔtreY ΔtreT Δtps triple mutant of S. acidocaldarius, which lacks the ability to synthesize trehalose, showed no altered phenotype under standard conditions or heat stress but was unable to grow under salt stress. Accordingly, in the wild-type strain, a significant increase of intracellular trehalose formation was observed under salt stress. Quantitative real-time PCR showed a salt stress-mediated induction of all three trehalose-synthesizing pathways. This demonstrates that in Archaea, trehalose plays an essential role for growth under high-salt conditions.IMPORTANCE The metabolism and function of trehalose as a compatible solute in Archaea was not well understood. This combined genetic and enzymatic approach at the interface of microbiology, physiology, and microbial ecology gives important insights into survival under stress, adaptation to extreme environments, and the role of compatible solutes in Archaea Here, we unraveled the complexity of trehalose metabolism, and we present a comprehensive study on trehalose function in stress response in S. acidocaldarius This sheds light on the general microbiology and the fascinating metabolic repertoire of Archaea, involving many novel biocatalysts, such as glycosyltransferases, with great potential in biotechnology.
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129
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Ma Y, Dias MC, Freitas H. Drought and Salinity Stress Responses and Microbe-Induced Tolerance in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:591911. [PMID: 33281852 DOI: 10.3389/fpls.2020.591911molazem] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/19/2020] [Indexed: 05/25/2023]
Abstract
Drought and salinity are among the most important environmental factors that hampered agricultural productivity worldwide. Both stresses can induce several morphological, physiological, biochemical, and metabolic alterations through various mechanisms, eventually influencing plant growth, development, and productivity. The responses of plants to these stress conditions are highly complex and depend on other factors, such as the species and genotype, plant age and size, the rate of progression as well as the intensity and duration of the stresses. These factors have a strong effect on plant response and define whether mitigation processes related to acclimation will occur or not. In this review, we summarize how drought and salinity extensively affect plant growth in agriculture ecosystems. In particular, we focus on the morphological, physiological, biochemical, and metabolic responses of plants to these stresses. Moreover, we discuss mechanisms underlying plant-microbe interactions that confer abiotic stress tolerance.
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Affiliation(s)
- Ying Ma
- University of Coimbra, Centre for Functional Ecology, Department of Life Sciences, Coimbra, Portugal
| | - Maria Celeste Dias
- University of Coimbra, Centre for Functional Ecology, Department of Life Sciences, Coimbra, Portugal
| | - Helena Freitas
- University of Coimbra, Centre for Functional Ecology, Department of Life Sciences, Coimbra, Portugal
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Ponnu J, Schlereth A, Zacharaki V, Działo MA, Abel C, Feil R, Schmid M, Wahl V. The trehalose 6-phosphate pathway impacts vegetative phase change in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 104:768-780. [PMID: 32799402 DOI: 10.1111/tpj.14965] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/12/2020] [Accepted: 07/13/2020] [Indexed: 05/16/2023]
Abstract
The vegetative phase change marks the beginning of the adult phase in the life cycle of plants and is associated with a gradual decline in the microRNA miR156, in response to sucrose status. Trehalose 6-phosphate (T6P) is a sugar molecule with signaling function reporting the current sucrose state. To elucidate the role of T6P signaling in vegetative phase change, molecular, genetic, and metabolic analyses were performed using Arabidopsis thaliana loss-of-function lines in TREHALOSE PHOSPHATE SYNTHASE1 (TPS1), a gene coding for an enzyme that catalyzes the production of T6P. These lines show a significant delay in vegetative phase change, under both short and long day conditions. Induced expression of TPS1 complements this delay in the TPS1 knockout mutant (tps1-2 GVG::TPS1). Further analyses indicate that the T6P pathway promotes vegetative phase transition by suppressing miR156 expression and thereby modulating the levels of its target transcripts, the SQUAMOSA PROMOTER BINDING PROTEIN-LIKE genes. TPS1 knockdown plants, with a delayed vegetative phase change phenotype, accumulate significantly more sucrose than wild-type plants as a result of a feedback mechanism. In summary, we conclude that the T6P pathway forms an integral part of an endogenous mechanism that influences phase transitions dependent on the metabolic state.
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Affiliation(s)
- Jathish Ponnu
- Department of Molecular Biology, Max Planck Institute for Developmental Biology, Spemannstraße 35, Tübingen, 72076, Germany
| | - Armin Schlereth
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | | | - Magdalena A Działo
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Christin Abel
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Regina Feil
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
| | - Markus Schmid
- Department of Molecular Biology, Max Planck Institute for Developmental Biology, Spemannstraße 35, Tübingen, 72076, Germany
| | - Vanessa Wahl
- Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, Potsdam, 14476, Germany
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Qiao Y, Wang W, Lu X. Engineering cyanobacteria as cell factories for direct trehalose production from CO2. Metab Eng 2020; 62:161-171. [DOI: 10.1016/j.ymben.2020.08.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 08/12/2020] [Accepted: 08/29/2020] [Indexed: 10/23/2022]
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132
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Mass spectrometry-based metabolomics investigation on two different indica rice grains (Oryza sativa L.) under cadmium stress. Food Chem 2020; 343:128472. [PMID: 33139121 DOI: 10.1016/j.foodchem.2020.128472] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/17/2020] [Accepted: 10/20/2020] [Indexed: 12/11/2022]
Abstract
Cadmium is a toxic environmental pollutant that is readily absorbed by rice grains and poses serious threats to human health. The selection and breeding of rice varieties with low cadmium accumulation is one of the most economical and ecological methods to reduce cadmium exposure. In this study, two different indica rice grains under cadmium stress were subjected to mass spectrometry-based metabolomics analysis for the first time. When the cadmium concentration increased in rice grains, most carbohydrates and amino acids were down-regulated, except myoinositol that can prevent cadmium toxicity, which was up-regulated. d-Mannitol and l-cysteine were up-regulated with the increase of cadmium concentration in low-cadmium-accumulating rice. Also, organic acids were activated especially 13-(S)-hydroperoxy-9(Z),11(E),15(Z)-octadecatrienoicacid that is related to the alpha-linolenic acid metabolism and jasmonic acid production. The determination of biomarkers and characterization of metabolic pathways might be helpful for the selection of rice varieties with low cadmium accumulation.
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133
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Yadav RK, Chatrath A, Tripathi K, Gerard M, Ahmad A, Mishra V, Abraham G. Salinity tolerance mechanism in the aquatic nitrogen fixing pteridophyte Azolla: a review. Symbiosis 2020. [DOI: 10.1007/s13199-020-00736-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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134
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Anli M, Baslam M, Tahiri A, Raklami A, Symanczik S, Boutasknit A, Ait-El-Mokhtar M, Ben-Laouane R, Toubali S, Ait Rahou Y, Ait Chitt M, Oufdou K, Mitsui T, Hafidi M, Meddich A. Biofertilizers as Strategies to Improve Photosynthetic Apparatus, Growth, and Drought Stress Tolerance in the Date Palm. FRONTIERS IN PLANT SCIENCE 2020; 11:516818. [PMID: 33193464 PMCID: PMC7649861 DOI: 10.3389/fpls.2020.516818] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 09/22/2020] [Indexed: 05/24/2023]
Abstract
Rainfall regimes are expected to shift on a regional scale as the water cycle intensifies in a warmer climate, resulting in greater extremes in dry versus wet conditions. Such changes are having a strong impact on the agro-physiological functioning of plants that scale up to influence interactions between plants and microorganisms and hence ecosystems. In (semi)-arid ecosystems, the date palm (Phoenix dactylifera L.) -an irreplaceable tree- plays important socio-economic roles. In the current study, we implemeted an adapted management program to improve date palm development and its tolerance to water deficit by using single or multiple combinations of exotic and native arbuscular mycorrhizal fungi (AMF1 and AMF2 respectively), and/or selected consortia of plant growth-promoting rhizobacteria (PGPR: B1 and B2), and/or composts from grasses and green waste (C1 and C2, respectively). We analyzed the potential for physiological functioning (photosynthesis, water status, osmolytes, mineral nutrition) to evolve in response to drought since this will be a key indicator of plant resilience in future environments. As result, under water deficit, the selected biofertilizers enhanced plant growth, leaf water potential, and electrical conductivity parameters. Further, the dual-inoculation of AMF/PGPR amended with composts alone or in combination boosted the biomass under water deficit conditions to a greater extent than in non-inoculated and/or non-amended plants. Both single and dual biofertilizers improved physiological parameters by elevating stomatal conductance, photosynthetic pigments (chlorophyll and carotenoids content), and photosynthetic efficiency. The dual inoculation and compost significantly enhanced, especially under drought stress, the concentrations of sugar and protein content, and antioxidant enzymes (polyphenoloxidase and peroxidase) activities as a defense strategy as compared with controls. Under water stress, we demonstrated that phosphorus was improved in the inoculated and amended plants alone or in combination in leaves (AMF2: 807%, AMF1+B2: 657%, AMF2+C1+B2: 500%, AMF2+C2: 478%, AMF1: 423%) and soil (AMF2: 397%, AMF1+B2: 322%, AMF2+C1+B2: 303%, AMF1: 190%, C1: 188%) in comparison with controls under severe water stress conditions. We summarize the extent to which the dual and multiple combinations of microorganisms can overcome challenges related to drought by enhancing plant physiological responses.
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Affiliation(s)
- Mohamed Anli
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Marouane Baslam
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, Japan
| | - Abdelilah Tahiri
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Anas Raklami
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Sarah Symanczik
- Department of Soil Sciences, Research Institute of Organic Agriculture Frick (FiBL), Frick, Switzerland
| | - Abderrahim Boutasknit
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Mohamed Ait-El-Mokhtar
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Raja Ben-Laouane
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Salma Toubali
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Youssef Ait Rahou
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Mustapha Ait Chitt
- Domaines Agricoles, Laboratoire El Bassatine, Domaine El Bassatine, Meknès, Morocco
| | - Khalid Oufdou
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
| | - Toshiaki Mitsui
- Laboratory of Biochemistry, Faculty of Agriculture, Niigata University, Niigata, Japan
| | - Mohamed Hafidi
- Laboratory of Microbial Biotechnologies, Agrosciences, and Environment (BioMAgE), Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
- Mohammed VI Polytechnic University (UM6P), Agrobiosciences program (AgBs), Benguerir, Morocco
| | - Abdelilah Meddich
- Laboratory of Agro-Food, Biotechnologies and Valorization of Plant Bioresources (AGROBIOVAL), Department of Biology, Faculty of Science Semlalia, Cadi Ayyad University (UCA), Marrakesh, Morocco
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Zia R, Nawaz MS, Siddique MJ, Hakim S, Imran A. Plant survival under drought stress: Implications, adaptive responses, and integrated rhizosphere management strategy for stress mitigation. Microbiol Res 2020; 242:126626. [PMID: 33189069 DOI: 10.1016/j.micres.2020.126626] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 10/06/2020] [Accepted: 10/10/2020] [Indexed: 12/25/2022]
Abstract
In many regions of the world, the incidence and extent of drought spells are predicted to increase which will create considerable pressure on global agricultural yields. Most likely among all the abiotic stresses, drought has the strongest effect on soil biota and plants along with complex environmental effects on other ecological systems. Plants being sessile appears the least resilient where drought creates osmotic stress, limits nutrient mobility due to soil heterogeneity, and reduces nutrient access to plant roots. Drought tolerance is a complex quantitative trait controlled by many genes and is one of the difficult traits to study and characterize. Nevertheless, existing studies on drought have indicated the mechanisms of drought resistance in plants on the morphological, physiological, and molecular basis and strategies have been devised to cope with the drought stress such as mass screening, breeding, marker-assisted selection, exogenous application of hormones or osmoprotectants and or engineering for drought resistance. These strategies have largely ignored the role of the rhizosphere in the plant's drought response. Studies have shown that soil microbes have a substantial role in modulation of plant response towards biotic and abiotic stress including drought. This response is complex and involves alteration in host root system architecture through hormones, osmoregulation, signaling through reactive oxygen species (ROS), induction of systemic tolerance (IST), production of large chain extracellular polysaccharides (EPS), and transcriptional regulation of host stress response genes. This review focuses on the integrated rhizosphere management strategy for drought stress mitigation in plants with a special focus on rhizosphere management. This combinatorial approach may include rhizosphere engineering by addition of drought-tolerant bacteria, nanoparticles, liquid nano clay (LNC), nutrients, organic matter, along with plant-modification with next-generation genome editing tool (e.g., CRISPR/Cas9) for quickly addressing emerging challenges in agriculture. Furthermore, large volumes of rainwater and wastewater generated daily can be smartly recycled and reused for agriculture. Farmers and other stakeholders will get a proper knowledge-exchange and an ideal road map to utilize available technologies effectively and to translate the measures into successful plant-water stress management. The proposed approach is cost-effective, eco-friendly, user-friendly, and will impart long-lasting benefits on agriculture and ecosystem and reduce vulnerability to climate change.
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Affiliation(s)
- Rabisa Zia
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Muhammad Shoib Nawaz
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Muhammad Jawad Siddique
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Sughra Hakim
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan; Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan
| | - Asma Imran
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577 Jhang Road, Faisalabad, Pakistan.
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Wang X, Chen Y, Jiang S, Xu F, Wang H, Wei Y, Shao X. PpINH1, an invertase inhibitor, interacts with vacuolar invertase PpVIN2 in regulating the chilling tolerance of peach fruit. HORTICULTURE RESEARCH 2020; 7:168. [PMID: 33082974 PMCID: PMC7527553 DOI: 10.1038/s41438-020-00389-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 07/22/2020] [Accepted: 07/27/2020] [Indexed: 05/03/2023]
Abstract
Sucrose metabolism, particularly the decomposition of sucrose by invertase, plays a central role in plant responses to cold stress. Invertase inhibitors (INHs) evolved in higher plants as essential regulators of sucrose metabolism. By limiting invertase activity, INHs keep cellular sugar levels elevated, which provides enhanced protection to plants under stress. Our results showed that the expression of PpVIN2, the only vacuolar invertase (VIN) gene in peach fruit sensitive to chilling temperatures, increases significantly during cold storage, while VIN enzyme activity increases more modestly. We also found that peach fruit transiently overexpressing PpINH1 had decreased VIN activity. Interactions of PpINH1 and PpVIN2 with recombinant proteins were shown by yeast two-hybrid assays and bimolecular fluorescence complementation assays, as well as in vitro. During cold storage, trehalose-treated peach fruit had significantly increased PpINH1 expression, decreased VIN enzyme activity, and significantly higher sucrose content than did untreated fruit. As a result, the treated fruit had enhanced resistance to chilling injury. Collectively, our data show that the post-translational repression of VIN enzyme activity by PpINH1 helps maintain sucrose levels in peach fruit during cold storage, thereby improving resistance to chilling injury.
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Affiliation(s)
- Xingxing Wang
- College of Food and Pharmaceutical Sciences, Ningbo University, 315800 Ningbo, China
| | - Yi Chen
- College of Food and Pharmaceutical Sciences, Ningbo University, 315800 Ningbo, China
| | - Shu Jiang
- College of Food and Pharmaceutical Sciences, Ningbo University, 315800 Ningbo, China
| | - Feng Xu
- College of Food and Pharmaceutical Sciences, Ningbo University, 315800 Ningbo, China
| | - Hongfei Wang
- College of Food and Pharmaceutical Sciences, Ningbo University, 315800 Ningbo, China
| | - Yingying Wei
- College of Food and Pharmaceutical Sciences, Ningbo University, 315800 Ningbo, China
| | - Xingfeng Shao
- College of Food and Pharmaceutical Sciences, Ningbo University, 315800 Ningbo, China
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137
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Wang W, Chen Q, Xu S, Liu W, Zhu X, Song C. Trehalose-6-phosphate phosphatase E modulates ABA-controlled root growth and stomatal movement in Arabidopsis. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2020; 62:1518-1534. [PMID: 32167237 PMCID: PMC7586804 DOI: 10.1111/jipb.12925] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 03/08/2020] [Indexed: 05/21/2023]
Abstract
Trehalose plays important roles in plant growth and stress responses and is synthesized from trehalose-6-phosphate by trehalose-6-phosphate phosphatase (TPP). Here, we show that trehalose and abscisic acid (ABA) have synergistic effects on root growth and stomatal closure. The Arabidopsis thaliana genome contains ten genes encoding TPPs and the expression level of one, TPPE, and trehalose contents increased in response to ABA. In the presence of ABA, the ABA-responsive transcription factor ABA RESPONSE ELEMENT BINDING FACTOR2 (ABF2) directly binds to the TPPE promoter to activate its expression. Genetic analysis revealed that TPPE acts downstream of ABF2, which is supported by the findings that TPPE expression and trehalose content are reduced in the abf2 mutant and that a mutation in TPPE abolished the ABA-sensitive root elongation phenotype of 35S:ABF2 plants. Reactive oxygen species (ROS) accumulation in response to ABA failed to occur in tppe mutant plants, suggesting that TPPE is involved in ABA-controlled root elongation and stomatal movement by inducing ROS accumulation. This study uncovers a new branch of the ABA signaling pathway and provides a molecular basis for the role of trehalose in plant responses to abiotic stress.
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Affiliation(s)
- Wenjing Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life SciencesHenan UniversityKaifeng475001China
- Department of Biology and Food ScienceShangqiu Normal UniversityShangqiu476000China
| | - Qingbin Chen
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life SciencesHenan UniversityKaifeng475001China
| | - Shouming Xu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life SciencesHenan UniversityKaifeng475001China
| | - Wen‐Cheng Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life SciencesHenan UniversityKaifeng475001China
| | - Xiaohong Zhu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life SciencesHenan UniversityKaifeng475001China
| | - Chun‐Peng Song
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life SciencesHenan UniversityKaifeng475001China
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138
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Metabolomics Reveals Distinct Metabolites between Lonicera japonica and Lonicera macranthoides Based on GC-MS. J CHEM-NY 2020. [DOI: 10.1155/2020/6738571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Lonicera japonica Thunb. (LJ) and Lonicera macranthoides Hand. -Mazz. (LM) have been widely used in Chinese medicine for thousands of years. Although the morphological characteristics of LJ and LM are quite similar, there are significant distinctions of medicinal ingredients (mainly the secondary metabolites) and clinical indications between them. However, the in-depth differences of primary metabolites have not thoroughly been studied yet. Therefore, gas chromatography-mass spectrometry- (GC-MS-) based metabolomics method combined with chemometric methods were performed to analyze the distinction in this study. The results showed that LJ and LM were obviously classified into two groups. 10 metabolites were obtained as biomarkers on account of their p values, pcorr values, and differing variable importance in projection (VIP) values. Metabolic pathway analysis showed that the galactose metabolism and starch and sucrose metabolism gathered as potential pathways caused these extraordinary differences of primary metabolites between LJ and LM. Further, we found that the differences of main medicinal ingredients between LJ and LM could be interpreted from these metabolites according to the analysis of mainly related pathways. The metabolites involved in the starch and sucrose metabolism presented upregulated in LJ, while almost all metabolites in the galactose metabolism, the TCA cycle, and the phenolic acid part of phenylpropanoid metabolism were downregulated in LJ. Therefore, the energy stored in the starch and sucrose metabolism may be saved to produce flavonoid, which could be the reason that the level of flavonoid of phenylpropanoid metabolism is higher in LJ compared to LM. Consequently, this study presented an effective tool for quality evaluation of LJ and LM and laid a foundation for further studies of the metabolic mechanisms and high-quality manufacturing of them.
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139
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Li W, Gupta A, Tian H, Nguyen KH, Tran CD, Watanabe Y, Tian C, Li K, Yang Y, Guo J, Luo Y, Miao Y, Phan Tran LS. Different strategies of strigolactone and karrikin signals in regulating the resistance of Arabidopsis thaliana to water-deficit stress. PLANT SIGNALING & BEHAVIOR 2020; 15:1789321. [PMID: 32669036 PMCID: PMC8550175 DOI: 10.1080/15592324.2020.1789321] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/19/2020] [Accepted: 06/20/2020] [Indexed: 05/21/2023]
Abstract
Strigolactone and karrikin receptors, DWARF14 (D14) and KARRIKIN INSENSITIVE 2 (KAI2), respectively, have been shown to positively regulate drought resistance in Arabidopsis thaliana by modulating abscisic acid responsiveness, anthocyanin accumulation, stomatal closure, cell membrane integrity and cuticle formation. Here, we aim to identify genes specifically or commonly regulated by D14 and KAI2 under water scarcity, using comparative analysis of the transcriptome data of the A. thaliana d14-1 and kai2-2 mutants under dehydration conditions. In comparison with wild-type, under dehydration conditions, the expression levels of genes related to photosynthesis and the metabolism of glucosinolates and trehalose were significantly changed in both d14-1 and kai2-2 mutant plants, whereas the transcript levels of genes related to the metabolism of cytokinins and brassinosteroids were significantly altered in the d14-1 mutant plants only. These results suggest that cytokinin and brassinosteroid metabolism might be specifically regulated by the D14 pathway, whereas photosynthesis and metabolism of glucosinolates and trehalose are potentially regulated by both D14 and KAI2 pathways in plant response to water scarcity.
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Affiliation(s)
- Weiqiang Li
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, China
- Stress Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, Yokohama, Japan
- Henan Joint International Laboratory for Crop Multi-Omics Research, Henan University, Kaifeng, China
| | - Aarti Gupta
- Department of Life Sciences, POSTECH Biotech Center, Pohang University of Science and Technology, Pohang, Korea
| | - Hongtao Tian
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, China
| | - Kien Huu Nguyen
- Agricultural Genetics Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
| | - Cuong Duy Tran
- Stress Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, Yokohama, Japan
- Agricultural Genetics Institute, Vietnam Academy of Agricultural Sciences, Hanoi, Vietnam
| | - Yasuko Watanabe
- Stress Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, Yokohama, Japan
| | - Chunjie Tian
- Key Laboratory of Mollisols Agroecology, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, China
| | - Kun Li
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, China
- Henan Joint International Laboratory for Crop Multi-Omics Research, Henan University, Kaifeng, China
| | - Yong Yang
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, China
| | - Jinggong Guo
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, China
- Henan Joint International Laboratory for Crop Multi-Omics Research, Henan University, Kaifeng, China
| | - Yin Luo
- School of Life Sciences, East China Normal University, Shanghai, China
| | - Yuchen Miao
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, China
- Henan Joint International Laboratory for Crop Multi-Omics Research, Henan University, Kaifeng, China
- CONTACT Yuchen Miao Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, 85 Minglun Street, Kaifeng475001, China
| | - Lam-Son Phan Tran
- Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Vietnam; Stress Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, Yokohama, Japan
- Lam-Son Phan Tran ; Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang, Vietnam; Stress Adaptation Research Unit, RIKEN Center for Sustainable Resource Science, 1-7-22, Suehiro-cho, Yokohama 230-0045, Japan
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140
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Han C, Liu Y, Shi W, Qiao Y, Wang L, Tian Y, Fan M, Deng Z, Lau OS, De Jaeger G, Bai MY. KIN10 promotes stomatal development through stabilization of the SPEECHLESS transcription factor. Nat Commun 2020; 11:4214. [PMID: 32843632 PMCID: PMC7447634 DOI: 10.1038/s41467-020-18048-w] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 07/26/2020] [Indexed: 11/09/2022] Open
Abstract
Stomata are epidermal structures that modulate gas exchanges between plants and the atmosphere. The formation of stomata is regulated by multiple developmental and environmental signals, but how these signals are coordinated to control this process remains unclear. Here, we showed that the conserved energy sensor kinase SnRK1 promotes stomatal development under short-day photoperiod or in liquid culture conditions. Mutation of KIN10, the catalytic α-subunit of SnRK1, results in the decreased stomatal index; while overexpression of KIN10 significantly induces stomatal development. KIN10 displays the cell-type-specific subcellular location pattern. The nuclear-localized KIN10 proteins are highly enriched in the stomatal lineage cells to phosphorylate and stabilize SPEECHLESS, a master regulator of stomatal formation, thereby promoting stomatal development. Our work identifies a module links connecting the energy signaling and stomatal development and reveals that multiple regulatory mechanisms are in place for SnRK1 to modulate stomatal development in response to changing environments.
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Affiliation(s)
- Chao Han
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Yue Liu
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Wen Shi
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Yan Qiao
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Lingyan Wang
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Yanchen Tian
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Min Fan
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Zhiping Deng
- State Key Laboratory for Quality and Safety of Agro-products, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - On Sun Lau
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117543, Singapore
| | - Geert De Jaeger
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium.,VIB Center for Plant Systems Biology, Ghent, Belgium
| | - Ming-Yi Bai
- The Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao, 266237, China.
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141
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Liang XG, Gao Z, Shen S, Paul MJ, Zhang L, Zhao X, Lin S, Wu G, Chen XM, Zhou SL. Differential ear growth of two maize varieties to shading in the field environment: Effects on whole plant carbon allocation and sugar starvation response. JOURNAL OF PLANT PHYSIOLOGY 2020; 251:153194. [PMID: 32563766 DOI: 10.1016/j.jplph.2020.153194] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 05/13/2020] [Accepted: 05/17/2020] [Indexed: 06/11/2023]
Abstract
The interception of irradiation by smog pollution and cloud cover associated with extreme rainfall events has become an increasingly important limiting factor in crop production in China. Little is known about the adaptation of carbon (C) allocation to periodic low irradiance in field conditions. The trehalose signaling pathway plays a critical role in adapting C allocation to the environment in crops but its importance in adaptation to low light in field conditions is not known. To determine the effects of low irradiance on C economy and maize yield, two commonly grown hybrids (LY-16 and ZD-958) were subject to three levels of shading (15 %, 50 %, and 97 %) for one week from V13 stage in two successive seasons. Shading led to yield loss mainly due to decreased kernel number, which was greater in LY-16 than ZD-958. Effects of shading on leaf area and photosynthesis were similar in both varieties. Starch levels in leaves were maintained, whereas total soluble carbohydrates were reduced up to fivefold by shading in both varieties. Shading increased the proportion of photoassimilate retained in leaves relative to reproductive organs. Carbohydrates in ears and stem were decreased by shading similarly in both varieties. Amongst the parameters measured, the main difference between LY-16 and ZD-958 associated with yield penalty was the expression of class II trehalose phosphate synthase (TPS) and trehalose-6-phosphate phosphatase (TPP) genes which were increased due to shading in leaves and ears, particularly in ears of LY-16. It is concluded that altered C fixation and allocation by low irradiance limited ear growth at pre-anthesis. Activation of TPSII and TPP genes indicates that the trehalose pathway likely plays a role in ear development under low light and could be a target for yield improvement under such conditions as with other stresses.
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Affiliation(s)
- Xiao-Gui Liang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; School of Agricultural Sciences, Jiangxi Agricultural University, Nanchang 330045, China
| | - Zhen Gao
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Si Shen
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Matthew J Paul
- Department of Plant Science, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, UK
| | - Li Zhang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Xue Zhao
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Shan Lin
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Gong Wu
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Xian-Min Chen
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
| | - Shun-Li Zhou
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; Scientific Observation and Experimental Station of Crop High Efficient Use of Water in Wuqiao, the Ministry of Agriculture and Rural Affairs, Wuqiao 061802, China; Innovation Center of Agricultural Technology for Lowland Plain of Hebei, Wuqiao, 061802, China.
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142
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The Inhibitory Effect of Validamycin A on Aspergillus flavus. Int J Microbiol 2020; 2020:3972415. [PMID: 32676114 PMCID: PMC7336217 DOI: 10.1155/2020/3972415] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/08/2020] [Accepted: 06/03/2020] [Indexed: 12/13/2022] Open
Abstract
Aspergillus flavus is one of the most common isolates from patients with fungal infections. Aspergillus infection is usually treated with antifungal agents, but side effects of these agents are common. Trehalase is an essential enzyme involved in fungal metabolism, and the trehalase inhibitor, validamycin A, has been used to prevent fungal infections in agricultural products. In this study, we observed that validamycin A significantly increased trehalose levels in A. flavus conidia and delayed germination, including decreased fungal adherence. In addition, validamycin A and amphotericin B showed a combinatorial effect on A. flavus ATCC204304 and clinical isolates with high minimum inhibitory concentrations (MICs) of amphotericin B using checkerboard assays. We observed that validamycin A and amphotericin B had a synergistic effect on A. flavus strains resistant to amphotericin B. The MICs in the combination of validamycin A and amphotericin B were at 0.125 μg/mL and 2 μg/mL, respectively. The FICI of validamycin A and amphotericin B of these clinical isolates was about 0.25-0.28 with synergistic effects. No drug cytotoxicity was observed in human bronchial epithelial cells treated with validamycin A using LDH-cytotoxicity assays. In conclusion, this study demonstrated that validamycin A inhibited the growth of A. flavus and delayed conidial germination. Furthermore, the combined effect of validamycin A with amphotericin B increased A. flavus killing, without significant cytotoxicity to human bronchial epithelial cells. We propose that validamycin A could potentially be used in vivo as an alternative treatment for A. flavus infections.
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143
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Facing Climate Change: Application of Microbial Biostimulants to Mitigate Stress in Horticultural Crops. AGRONOMY-BASEL 2020. [DOI: 10.3390/agronomy10060794] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In the current scenario of rapidly evolving climate change, crop plants are more frequently subjected to stresses of both abiotic and biotic origin, including exposure to unpredictable and extreme climatic events, changes in plant physiology, growing season and phytosanitary hazard, and increased losses up to 30% and 50% in global agricultural productions. Plants coevolved with microbial symbionts, which are involved in major functions both at the ecosystem and plant level. The use of microbial biostimulants, by exploiting this symbiotic interaction, represents a sustainable strategy to increase plant performances and productivity, even under stresses due to climate changes. Microbial biostimulants include beneficial fungi, yeasts and eubacteria sharing the ability to improve plant nutrition, growth, productivity and stress tolerance. This work reports the current knowledge on microbial biostimulants and provides a critical review on their possible use to mitigate the biotic and abiotic stresses caused by climate changes. Currently, available products often provide a general amelioration of cultural conditions, but their action mechanisms are largely undetermined and their effects often unreliable. Future research may lead to more specifically targeted products, based on the characterization of plant-microbe and microbial community interactions.
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144
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Son SH, Son YE, Cho HJ, Chen W, Lee MK, Kim LH, Han DM, Park HS. Homeobox proteins are essential for fungal differentiation and secondary metabolism in Aspergillus nidulans. Sci Rep 2020; 10:6094. [PMID: 32269291 PMCID: PMC7142095 DOI: 10.1038/s41598-020-63300-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/24/2020] [Indexed: 02/07/2023] Open
Abstract
The homeobox domain-containing transcription factors play an important role in the growth, development, and secondary metabolism in fungi and other eukaryotes. In this study, we characterized the roles of the genes coding for homeobox-type proteins in the model organism Aspergillus nidulans. To examine their roles in A. nidulans, the deletion mutant strains for each gene coding for homeobox-type protein were generated, and their phenotypes were examined. Phenotypic analyses revealed that two homeobox proteins, HbxA and HbxB, were required for conidia production. Deletion of hbxA caused abnormal conidiophore production, decreased the number of conidia in both light and dark conditions, and decreased the size of cleistothecia structures. Overexpressing hbxA enhanced the production of asexual spores and formation of conidiophore under the liquid submerged conditions. The hbxB deletion mutant strains exhibited decreased asexual spore production but increased cleistothecia production. The absence of hbxB decreased the trehalose content in asexual spores and increased their sensitivity against thermal and oxidative stresses. The ΔhbxA strains produced more sterigmatocystin, which was decreased in the ΔhbxB strain. Overall, our results show that HbxA and HbxB play crucial roles in the differentiation and secondary metabolism of the fungus A. nidulans.
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Affiliation(s)
- Sung-Hun Son
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Ye-Eun Son
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - He-Jin Cho
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Wanping Chen
- Department of Molecular Microbiology and Genetics, University of Göttingen, Göttingen, 37077, Germany
| | - Mi-Kyung Lee
- Biological Resource Center (BRC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup-si, 34141, Republic of Korea
| | - Lee-Han Kim
- Division of Biological Sciences, Wonkwang University, Iksan, 54538, Republic of Korea
| | - Dong-Min Han
- Division of Biological Sciences, Wonkwang University, Iksan, 54538, Republic of Korea
| | - Hee-Soo Park
- School of Food Science and Biotechnology, Kyungpook National University, Daegu, 41566, Republic of Korea. .,Department of Integrative Biology, Kyungpook National University, Daegu, 41566, Republic of Korea.
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145
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Dai Y, Zhang S, Sun X, Li G, Yuan L, Li F, Zhang H, Zhang S, Chen G, Wang C, Sun R. Comparative Transcriptome Analysis of Gene Expression and Regulatory Characteristics Associated with Different Vernalization Periods in Brassica rapa. Genes (Basel) 2020; 11:E392. [PMID: 32260536 PMCID: PMC7231026 DOI: 10.3390/genes11040392] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/17/2020] [Accepted: 04/03/2020] [Indexed: 12/17/2022] Open
Abstract
Brassica rapa is an important Chinese vegetable crop that is beneficial to human health. The primary factor affecting B. rapa yield is low temperature, which promotes bolting and flowering, thereby lowering its commercial value. However, quickened bolting and flowering can be used for rapid breeding. Therefore, studying the underlying molecular mechanism of vernalization in B.rapa is crucial for solving production-related problems. Here, the transcriptome of two B. rapa accessions were comprehensively analyzed during different vernalization periods. During vernalization, a total of 974,584,022 clean reads and 291.28 Gb of clean data were obtained. Compared to the reference genome of B. rapa, 44,799 known genes and 2280 new genes were identified. A self-organizing feature map analysis of 21,035 differentially expressed genes was screened in two B. rapa accessions, 'Jin Wawa' and 'Xiao Baojian'. The analysis indicated that transcripts related to the plant hormone signal transduction, starch and sucrose metabolism, photoperiod and circadian clock, and vernalization pathways changed notably at different vernalization periods. Moreover, different expression patterns of TPS, UGP, CDF, VIN1, and seven hormone pathway genes were observed during vernalization between the two accessions. The transcriptome results of this study provide a new perspective on the changes that occur during B. rapavernalization, as well as serve as an excellent reference for B. rapa breeding.
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Affiliation(s)
- Yun Dai
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
- Vegetable Genetics and Breeding Laboratory, College of Horticulture, Anhui Agricultural University, Hefei 230036, China; (L.Y.); (G.C.)
| | - Shujiang Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
| | - Xiao Sun
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
| | - Guoliang Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
| | - Lingyun Yuan
- Vegetable Genetics and Breeding Laboratory, College of Horticulture, Anhui Agricultural University, Hefei 230036, China; (L.Y.); (G.C.)
| | - Fei Li
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
| | - Hui Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
| | - Shifan Zhang
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
| | - Guohu Chen
- Vegetable Genetics and Breeding Laboratory, College of Horticulture, Anhui Agricultural University, Hefei 230036, China; (L.Y.); (G.C.)
| | - Chenggang Wang
- Vegetable Genetics and Breeding Laboratory, College of Horticulture, Anhui Agricultural University, Hefei 230036, China; (L.Y.); (G.C.)
| | - Rifei Sun
- Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; (Y.D.); (S.Z.); (X.S.); (G.L.); (F.L.); (H.Z.); (S.Z.)
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146
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Wang G, Li H, Gong Y, Yang J, Yi Y, Zhang J, Ye N. Expression profile of the carbon reserve remobilization from the source to sink in rice in response to soil drying during grain filling. Food Energy Secur 2020. [DOI: 10.1002/fes3.204] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Guanqun Wang
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China College of Agriculture Hunan Agricultural University Changsha China
- Department of Biology Hong Kong Baptist University Kowloon Hong Kong
| | - Haoxuan Li
- Department of Biology Hong Kong Baptist University Kowloon Hong Kong
| | - Yulong Gong
- School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Shatin Hong Kong
| | - Jianchang Yang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province Yangzhou University Yangzhou China
| | - Yake Yi
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China College of Agriculture Hunan Agricultural University Changsha China
| | - Jianhua Zhang
- Department of Biology Hong Kong Baptist University Kowloon Hong Kong
- School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Shatin Hong Kong
| | - Nenghui Ye
- Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China College of Agriculture Hunan Agricultural University Changsha China
- Department of Biology Hong Kong Baptist University Kowloon Hong Kong
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147
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Rhizobacteriome: Promising Candidate for Conferring Drought Tolerance in Crops. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.1.10] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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148
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Xu J, Chen Z, Wang F, Jia W, Xu Z. Combined transcriptomic and metabolomic analyses uncover rearranged gene expression and metabolite metabolism in tobacco during cold acclimation. Sci Rep 2020; 10:5242. [PMID: 32251321 PMCID: PMC7090041 DOI: 10.1038/s41598-020-62111-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 03/04/2020] [Indexed: 11/12/2022] Open
Abstract
Cold temperatures often severely restrict the growth, distribution and productivity of plants. The freezing tolerance of plants from temperate climates can be improved by undergoing periods of cold acclimation (CA). Tobacco is an important economic plant and is sensitive to cold stress. However, the dynamic changes and regulatory mechanisms of gene expression and metabolic processes during CA remain largely unknown. In this study, we performed RNA sequencing and metabolomic profiling analyses to identify the genes and metabolites specifically expressed during CA. Our transcriptomic data revealed 6905 differentially expressed genes (DEGs) during CA. Functional annotation and enrichment analyses revealed that the DEGs were involved mainly in signal transduction, carbohydrate metabolism and phenylpropanoid biosynthesis. Moreover, a total of 35 significantly changed metabolites were identified during CA via an LC-MS platform. Many protective metabolites, such as amino acids, carbohydrates, tricarboxylic acid (TCA) cycle intermediates and phenylpropanoid-related substances, were identified during CA. The gene-metabolite network extensively outlined the biological processes associated with the utilization of sugars, activation of amino acid metabolism, TCA cycle and phenylpropanoid biosynthesis in tobacco under CA. The results of our present study provide a comprehensive view of signal transduction and regulation, gene expression and dynamic changes in metabolites during CA.
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Affiliation(s)
- Jiayang Xu
- National Tobacco Cultivation and Physiology and Biochemistry Research Center, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China
| | - Zheng Chen
- National Tobacco Cultivation and Physiology and Biochemistry Research Center, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China
| | - Fazhan Wang
- National Tobacco Cultivation and Physiology and Biochemistry Research Center, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China
| | - Wei Jia
- National Tobacco Cultivation and Physiology and Biochemistry Research Center, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
| | - Zicheng Xu
- National Tobacco Cultivation and Physiology and Biochemistry Research Center, College of Tobacco Science, Henan Agricultural University, Zhengzhou, 450002, People's Republic of China.
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149
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Eida AA, Bougouffa S, Alam I, Saad MM, Hirt H. Complete genome sequence of the endophytic bacterium Cellulosimicrobium sp. JZ28 isolated from the root endosphere of the perennial desert tussock grass Panicum turgidum. Arch Microbiol 2020; 202:1563-1569. [PMID: 32172289 DOI: 10.1007/s00203-020-01859-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/01/2020] [Accepted: 03/04/2020] [Indexed: 02/04/2023]
Abstract
Cellulosimicrobium sp. JZ28, a root endophytic bacterium from the desert plant Panicum turgidum, was previously identified as a plant growth-promoting bacterium. The genome of JZ28 consists of a 4378,193 bp circular chromosome and contains 3930 CDSs with an average GC content of 74.5%. Whole-genome sequencing analysis revealed that JZ28 was closely related to C. aquatile 3 bp. The genome harbors genes responsible for protection against oxidative, osmotic and salinity stresses, such as the production of osmoprotectants. It also contains genes with a role in the production of volatiles, such as hydrogen sulfide, which promote biotic and abiotic stress tolerance in plants. The presence of three copies of chitinase genes indicates a possible role of JZ28 as biocontrol agent against fungal pathogens, while a number of genes for the degradation of plant biopolymers indicates potential application in industrial processes. Genome sequencing and mining of culture-dependent collections of bacterial endophytes from desert plants provide new opportunities for biotechnological applications.
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Affiliation(s)
- Abdul Aziz Eida
- DARWIN21, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Salim Bougouffa
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
- BioScience Core Lab, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Intikhab Alam
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Maged M Saad
- DARWIN21, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia.
| | - Heribert Hirt
- DARWIN21, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
- Max F. Perutz Laboratories, University of Vienna, Dr. Bohrgasse 9, 1030, Vienna, Austria
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150
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Eida AA, Bougouffa S, L’Haridon F, Alam I, Weisskopf L, Bajic VB, Saad MM, Hirt H. Genome Insights of the Plant-Growth Promoting Bacterium Cronobacter muytjensii JZ38 With Volatile-Mediated Antagonistic Activity Against Phytophthora infestans. Front Microbiol 2020; 11:369. [PMID: 32218777 PMCID: PMC7078163 DOI: 10.3389/fmicb.2020.00369] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 02/19/2020] [Indexed: 12/12/2022] Open
Abstract
Salinity stress is a major challenge to agricultural productivity and global food security in light of a dramatic increase of human population and climate change. Plant growth promoting bacteria can be used as an additional solution to traditional crop breeding and genetic engineering. In the present work, the induction of plant salt tolerance by the desert plant endophyte Cronobacter sp. JZ38 was examined on the model plant Arabidopsis thaliana using different inoculation methods. JZ38 promoted plant growth under salinity stress via contact and emission of volatile compounds. Based on the 16S rRNA and whole genome phylogenetic analysis, fatty acid analysis and phenotypic identification, JZ38 was identified as Cronobacter muytjensii and clearly separated and differentiated from the pathogenic C. sakazakii. Full genome sequencing showed that JZ38 is composed of one chromosome and two plasmids. Bioinformatic analysis and bioassays revealed that JZ38 can grow under a range of abiotic stresses. JZ38 interaction with plants is correlated with an extensive set of genes involved in chemotaxis and motility. The presence of genes for plant nutrient acquisition and phytohormone production could explain the ability of JZ38 to colonize plants and sustain plant growth under stress conditions. Gas chromatography-mass spectrometry analysis of volatiles produced by JZ38 revealed the emission of indole and different sulfur volatile compounds that may play a role in contactless plant growth promotion and antagonistic activity against pathogenic microbes. Indeed, JZ38 was able to inhibit the growth of two strains of the phytopathogenic oomycete Phytophthora infestans via volatile emission. Genetic, transcriptomic and metabolomics analyses, combined with more in vitro assays will provide a better understanding the highlighted genes' involvement in JZ38's functional potential and its interaction with plants. Nevertheless, these results provide insight into the bioactivity of C. muytjensii JZ38 as a multi-stress tolerance promoting bacterium with a potential use in agriculture.
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Affiliation(s)
- Abdul Aziz Eida
- DARWIN21, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Salim Bougouffa
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
- BioScience Core Lab, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | | | - Intikhab Alam
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Laure Weisskopf
- Department of Biology, University of Fribourg, Fribourg, Switzerland
| | - Vladimir B. Bajic
- Computational Bioscience Research Center, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Maged M. Saad
- DARWIN21, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Heribert Hirt
- DARWIN21, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
- Max F. Perutz Laboratories, University of Vienna, Vienna, Austria
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