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Guzmán-Guzmán P, Valencia-Cantero E, Santoyo G. Plant growth-promoting bacteria potentiate antifungal and plant-beneficial responses of Trichoderma atroviride by upregulating its effector functions. PLoS One 2024; 19:e0301139. [PMID: 38517906 PMCID: PMC10959389 DOI: 10.1371/journal.pone.0301139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 03/08/2024] [Indexed: 03/24/2024] Open
Abstract
Trichoderma uses different molecules to establish communication during its interactions with other organisms, such as effector proteins. Effectors modulate plant physiology to colonize plant roots or improve Trichoderma's mycoparasitic capacity. In the soil, these fungi can establish relationships with plant growth-promoting bacteria (PGPBs), thus affecting their overall benefits on the plant or its fungal prey, and possibly, the role of effector proteins. The aim of this study was to determine the induction of Trichoderma atroviride gene expression coding for effector proteins during the interaction with different PGPBs, Arabidopsis or the phytopathogen Fusarium brachygibbosum, and to determine whether PGPBs potentiates the beneficial effects of T. atroviride. During the interaction with F. brachygibbosum and PGPBs, the effector coding genes epl1, tatrx2 and tacfem1 increased their expression, especially during the consortia with the bacteria. During the interaction of T. atroviride with the plant and PGPBs, the expression of epl1 and tatrx2 increased, mainly with the consortium formed with Pseudomonas fluorescens UM270, Bacillus velezensis AF12, or B. halotolerans AF23. Additionally, the consortium formed by T. atroviride and R. badensis SER3 stimulated A. thaliana PR1:GUS and LOX2:GUS for SA- and JA-mediated defence responses. Finally, the consortium of T. atroviride with SER3 was better at inhibiting pathogen growth, but the consortium of T. atroviride with UM270 was better at promoting Arabidopsis growth. These results showed that the biocontrol capacity and plant growth-promoting traits of Trichoderma spp. can be potentiated by PGPBs by stimulating its effector functions.
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Affiliation(s)
- Paulina Guzmán-Guzmán
- Institute of Chemical and Biological Research, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Institute of Chemical and Biological Research, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | - Gustavo Santoyo
- Institute of Chemical and Biological Research, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
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Hernández-Soberano C, López-Bucio J, Valencia-Cantero E. The Bacterial Volatile Organic Compound N,N-Dimethylhexadecylamine Induces Long-Lasting Developmental and Immune Responses throughout the Life Cycle of Arabidopsis thaliana. Plants (Basel) 2023; 12:1540. [PMID: 37050166 PMCID: PMC10096718 DOI: 10.3390/plants12071540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/30/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
N,N-dimethylhexadecylamine (DMHDA) is a bacterial volatile organic compound that affects plant growth and morphogenesis and is considered a cross-kingdom signal molecule. Its bioactivity involves crosstalk with the cytokinin and jasmonic acid (JA) pathways to control stem cell niches and induce iron deficiency adaptation and plant defense. In this study, through genetic analysis, we show that the DMHDA-JA-Ethylene (ET) relations determine the magnitude of the defensive response mounted during the infestation of Arabidopsis plants by the pathogenic fungus Botrytis cinerea. The Arabidopsis mutants defective in the JA receptor CORONATINE INSENSITIVE 1 (coi1-1) showed a more severe infestation when compared to wild-type plants (Col-0) that were partially restored by DMHDA supplements. Moreover, the oversensitivity manifested by ETHYLENE INSENSITIVE 2 (ein2) by B. cinerea infestation could not be reverted by the volatile, suggesting a role for this gene in DMHDA reinforcement of immunity. Growth of Col-0 plants was inhibited by DMHDA, but ein2 did not. Noteworthy, Arabidopsis seeds treated with DMHDA produced more vigorous plants throughout their life cycle. These data are supportive of a scenario where plant perception of a bacterial volatile influences the resistance to a fungal phytopathogen while modulating plant growth.
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Montejano-Ramírez V, Valencia-Cantero E. Cross-Talk between Iron Deficiency Response and Defense Establishment in Plants. Int J Mol Sci 2023; 24:ijms24076236. [PMID: 37047208 PMCID: PMC10094134 DOI: 10.3390/ijms24076236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/15/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023] Open
Abstract
Plants are at risk of attack by various pathogenic organisms. During pathogenesis, microorganisms produce molecules with conserved structures that are recognized by plants that then initiate a defense response. Plants also experience iron deficiency. To address problems caused by iron deficiency, plants use two strategies focused on iron absorption from the rhizosphere. Strategy I is based on rhizosphere acidification and iron reduction, whereas Strategy II is based on iron chelation. Pathogenic defense and iron uptake are not isolated phenomena: the antimicrobial phenols are produced by the plant during defense, chelate and solubilize iron; therefore, the production and secretion of these molecules also increase in response to iron deficiency. In contrast, phytohormone jasmonic acid and salicylic acid that induce pathogen-resistant genes also modulate the expression of genes related to iron uptake. Iron deficiency also induces the expression of defense-related genes. Therefore, in the present review, we address the cross-talk that exists between the defense mechanisms of both Systemic Resistance and Systemic Acquired Resistance pathways and the response to iron deficiency in plants, with particular emphasis on the regulation genetic expression.
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Chávez-Moctezuma MP, Martínez-Cámara R, Hernández-Salmerón J, Moreno-Hagelsieb G, Santoyo G, Valencia-Cantero E. Comparative genomic and functional analysis of Arthrobacter sp. UMCV2 reveals the presence of luxR-related genes inducible by the biocompound N, N-dimethylhexadecilamine. Front Microbiol 2022; 13:1040932. [PMID: 36386619 PMCID: PMC9659744 DOI: 10.3389/fmicb.2022.1040932] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 10/10/2022] [Indexed: 09/29/2023] Open
Abstract
Quorum sensing (QS) is a bacterial cell-cell communication system with genetically regulated mechanisms dependent on cell density. Canonical QS systems in gram-negative bacteria possess an autoinducer synthase (LuxI family) and a transcriptional regulator (LuxR family) that respond to an autoinducer molecule. In Gram-positive bacteria, the LuxR transcriptional regulators "solo" (not associated with a LuxI homolog) may play key roles in intracellular communication. Arthrobacter sp. UMCV2 is an actinobacterium that promotes plant growth by emitting the volatile organic compound N, N-dimethylhexadecylamine (DMHDA). This compound induces iron deficiency, defense responses in plants, and swarming motility in Arthrobacter sp. UMCV2. In this study, the draft genome of this bacterium was assembled and compared with the genomes of type strains of the Arthrobacter genus, finding that it does not belong to any previously described species. Genome explorations also revealed the presence of 16 luxR-related genes, but no luxI homologs were discovered. Eleven of these sequences possess the LuxR characteristic DNA-binding domain with a helix-turn-helix motif and were designated as auto-inducer-related regulators (AirR). Four sequences possessed LuxR analogous domains and were designated as auto-inducer analogous regulators (AiaR). When swarming motility was induced with DMHDA, eight airR genes and two aiaR genes were upregulated. These results indicate that the expression of multiple luxR-related genes is induced in actinobacteria, such as Arthrobacter sp. UMCV2, by the action of the bacterial biocompound DMHDA when QS behavior is produced.
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Affiliation(s)
| | - Ramiro Martínez-Cámara
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
- Tecnológico Nacional de México, Morelia, Michoacán, Mexico
| | | | | | - Gustavo Santoyo
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico
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García-Cárdenas E, Ortiz-Castro R, Ruiz-Herrera LF, Valencia-Cantero E, López-Bucio J. Micrococcus luteus LS570 promotes root branching in Arabidopsis via decreasing apical dominance of the primary root and an enhanced auxin response. Protoplasma 2022; 259:1139-1155. [PMID: 34792622 DOI: 10.1007/s00709-021-01724-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 11/11/2021] [Indexed: 05/25/2023]
Abstract
The interaction of plant roots with bacteria is influenced by chemical signaling, where auxins play a critical role. Auxins exert positive or negative influences on the plant traits responsible of root architecture configuration such as root elongation and branching and root hair formation, but how bacteria that modify the plant auxin response promote or repress growth, as well as root structure, remains unknown. Here, we isolated and identified via molecular and electronic microscopy analysis a Micrococcus luteus LS570 strain as a plant growth promoter that halts primary root elongation in Arabidopsis seedlings and strongly triggers root branching and absorptive potential. The root biomass was exacerbated following root contact with bacterial streaks, and this correlated with inducible expression of auxin-related gene markers DR5:GUS and DR5:GFP. Cellular and structural analyses of root growth zones indicated that the bacterium inhibits both cell division and elongation within primary root tips, disrupting apical dominance, and as a consequence differentiation programs at the pericycle and epidermis, respectively, triggers the formation of longer and denser lateral roots and root hairs. Using Arabidopsis mutants defective on auxin signaling elements, our study uncovers a critical role of the auxin response factors ARF7 and ARF19, and canonical auxin receptors in mediating both the primary root and lateral root response to M. luteus LS570. Our report provides very basic information into how actinobacteria interact with plants and direct evidence that the bacterial genus Micrococcus influences the cellular and physiological plant programs ultimately responsible of biomass partitioning.
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Affiliation(s)
- Elizabeth García-Cárdenas
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Randy Ortiz-Castro
- Catedrático CONACYT-Instituto de Ecología A.C. Red de Estudios Moleculares Avanzados, Clúster BioMimic®, Instituto de Ecología A.C. Carretera Antigua a Coatepec, 351, El Haya, Xalapa, Veracruz, 91073, México
| | - León Francisco Ruiz-Herrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México.
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Hernández-Pacheco CE, Orozco-Mosqueda MDC, Flores A, Valencia-Cantero E, Santoyo G. Tissue-specific diversity of bacterial endophytes in Mexican husk tomato plants ( Physalis ixocarpa Brot. ex Horm.), and screening for their multiple plant growth-promoting activities. Curr Res Microb Sci 2021; 2:100028. [PMID: 34841319 PMCID: PMC8610326 DOI: 10.1016/j.crmicr.2021.100028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/02/2021] [Accepted: 03/09/2021] [Indexed: 11/26/2022] Open
Abstract
Endophytic bacterial diversity of root, stem, and leaf tissues of Physalis ixocarpa was deciphered. Unique and shared species were found for each plant compartment analyzed. Extensive screening of various isolates exhibited antagonism against fungal pathogens. Diverse endophytes stimulated the growth of Physalis ixocarpa seedlings. Neobacillus drentensis CH23 stood out as an excellent plant growth-promoting bacterium.
The endophytic bacterial diversity of root, stem, and leaf tissues of Mexican husk tomato plants (Physalis ixocarpa) was compared and deciphered, and screened for their plant growth-promoting activity and antagonism against fungal phytopathogens. Total 315 isolates (108 roots, 102 stems, and 105 leaves) were obtained and characterized by 16S ribosomal gene sequencing. The most abundant genera were Bacillus, Microbacterium, Pseudomonas, and Stenotrophomonas. Unique species were found for each tissue analyzed, along with B. thuringiensis, B. toyonensis, Neobacillus drentensis, Paenibacillus castaneae, P. fluorescens, P. poae, and S. maltophilia present throughout the plant. Biodiversity indices did not show significant differences, but root tissues showed the highest abundance of bacterial endophytes. Several isolates showed excellent promotion activities in Physalis ixocarpa seedlings, increasing the length and weight of the root, total biomass, and chlorophyll content. Various isolates also exhibited antagonism against fungal pathogens. Among screened isolates, Neobacillus drentensis CH23 was found in all plant compartments, exhibiting growth-promoting activity and fungal antagonism. Strain CH23 and other endophytes showed the production of indoleacetic acid, siderophores, proteases, and solubilization of phosphates. These results demonstrate that the husk tomato plant endobiome has a high potential as a bioinoculating agent for agriculturally important crops.
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Affiliation(s)
- Claudia E Hernández-Pacheco
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, 58030 Morelia, Mexico
| | - Ma Del Carmen Orozco-Mosqueda
- Facultad de Agrobiología "Presidente Juárez", Universidad Michoacana de San Nicolás de Hidalgo, Uruapan, Michoacán, Mexico
| | - Aurora Flores
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, 58030 Morelia, Mexico
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, 58030 Morelia, Mexico
| | - Gustavo Santoyo
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, 58030 Morelia, Mexico
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Vázquez-Chimalhua E, Valencia-Cantero E, López-Bucio J, Ruiz-Herrera LF. N,N-dimethyl-hexadecylamine modulates Arabidopsis root growth through modifying the balance between stem cell niche and jasmonic acid-dependent gene expression. Gene Expr Patterns 2021; 41:119201. [PMID: 34329770 DOI: 10.1016/j.gep.2021.119201] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 05/28/2021] [Accepted: 07/26/2021] [Indexed: 11/18/2022]
Abstract
N,N-dimethyl-hexadecylamine (DMHDA) is released as part of volatile blends emitted by plant probiotic bacteria and affects root architecture, defense and nutrition of plants. Here, we investigated the changes in gene expression of transcription factors responsible of maintenance of the root stem cell niche and jasmonic acid signaling in Arabidopsis seedlings in response to this volatile. Concentrations of DMHDA that repress primary root growth were found to alter cell size and division augmenting cell tissue layers in the meristem and causing root widening. DMHDA triggered the division of quiescent center cells, which correlated with repression of SHORT ROOT (SHR), SCARECROW (SCR), and PLETHORA 1 (PLT1) proteins and induction of WUSCHEL-RELATED HOMEOBOX 5 (WOX5) transcription factor. Interestingly, an activation of the expression of the jasmonic acid-related reporter genes JAZ1/TIFY10A-GFP and JAZ10pro::JAZ10-GFP suggests that the halted growth of the primary root inversely correlated with expression patterns underlying the defense reaction, which may be of adaptive importance to protect roots against biotic stress. Our data help to unravel the gene expression signatures upon sensing of a highly active bacterial volatile in Arabidopsis seedlings.
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Affiliation(s)
- Ernesto Vázquez-Chimalhua
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, Mexico
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, Mexico
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, Mexico.
| | - León Francisco Ruiz-Herrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, Mexico.
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Vázquez-Chimalhua E, Barrera-Ortiz S, Valencia-Cantero E, López-Bucio J, Ruiz-Herrera LF. The bacterial volatile N,N-dimethyl-hexadecylamine promotes Arabidopsis primary root elongation through cytokinin signaling and the AHK2 receptor. Plant Signal Behav 2021; 16:1879542. [PMID: 33586610 PMCID: PMC7971242 DOI: 10.1080/15592324.2021.1879542] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
N,N-dimethyl-hexadecylamine (DMHDA) is a volatile organic compound (VOC) produced by some plant growth-promoting rhizobacteria (PGPR), which inhibits the growth of pathogenic fungi and induces iron uptake by roots. In this report, through the application of a wide range of concentrations, we found that DMHDA affects Arabidopsis primary root growth and lateral root formation in a dose-dependent manner where 1 and 2 µM promoted root growth and higher (4-32 µM) concentrations repressed growth. Cytokinin-inducible TCS::GFP and ARR5::uidA gene constructs showed an increased expression in columella cells and root meristem, respectively, at 2 µM DMHDA, but their expression domains strongly diminished at growth repressing treatments. To test if either primary root growth promotion or repression could involve members of the cytokinin receptor family, the growth of WT and double mutant combinations cre1-12 ahk2-2, cre1-12 ahk3-3, and ahk2-2 ahk3-3 was tested in control conditions or supplemented with 2 µM or 16 µM DMHDA. Noteworthy, the root growth promotion disappeared in cre1-12 ahk2-2 and ahk2-2 ahk3-3 combinations, whereas all double mutants had higher repression than the WT at high doses. We further show that DMHDA fails to mimic the effects of ethylene in Arabidopsis seedlings grown in darkness that include an exaggerated apical hook, stem and root shortening, and root hair elongation. Our data help unravel how Arabidopsis senses a growth-modulating bacterial volatile through changes in cytokinin responsiveness.
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Affiliation(s)
- Ernesto Vázquez-Chimalhua
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, México
| | - Salvador Barrera-Ortiz
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, México
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, México
| | - León Francisco Ruiz-Herrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, Morelia, Michoacán, México
- CONTACT León Francisco Ruiz-Herrera Avenida Francisco J. Múgica S/N, Ciudad Universitaria, C.P. 58030
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Hernaández-Esquivel AA, Castro-Mercado E, Valencia-Cantero E, Alexandre G, García-Pineda E. Application of Azospirillum brasilense Lipopolysaccharides to Promote Early Wheat Plant Growth and Analysis of Related Biochemical Responses. Front Sustain Food Syst 2020. [DOI: 10.3389/fsufs.2020.579976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ramírez-Ordorica A, Valencia-Cantero E, Flores-Cortez I, Carrillo-Rayas MT, Elizarraraz-Anaya MIC, Montero-Vargas J, Winkler R, Macías-Rodríguez L. Metabolomic effects of the colonization of Medicago truncatula by the facultative endophyte Arthrobacter agilis UMCV2 in a foliar inoculation system. Sci Rep 2020; 10:8426. [PMID: 32439840 PMCID: PMC7242375 DOI: 10.1038/s41598-020-65314-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 04/10/2020] [Indexed: 12/17/2022] Open
Abstract
Biofertilizer production and application for sustainable agriculture is already a reality. The methods for biofertilizers delivery in crop fields are diverse. Although foliar spray is gaining wide acceptance, little is known about the influence that the biochemical features of leaves have on the microbial colonization. Arthrobacter agilis UMCV2 is a rhizospheric and endophytic bacteria that promotes plant growth and health. In this study, we determined the capacity of the UMCV2 strain to colonize different leaves from Medicago truncatula in a foliar inoculation system. By using two powerful analytical methods based on mass spectrometry, we determined the chemical profile of the leaves in 15-d old plants. The metabolic signatures between the unifoliate leaf (m1) and the metameric units developing above (m2 and m3) were different, and interestingly, the highest colony forming units (CFU) was found in m1. The occurrence of the endophyte strongly affects the sugar composition in m1 and m2 leaves. Our results suggest that A. agilis UMCV2 colonize the leaves under a foliar inoculation system independently of the phenological age of the leaf and it is capable of modulating the carbohydrate metabolism without affecting the rest of the metabolome.
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Affiliation(s)
- Arturo Ramírez-Ordorica
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - Idolina Flores-Cortez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México
| | - María Teresa Carrillo-Rayas
- Department of Biotechnology and Biochemistry, Cinvestav Unidad Irapuato. Km. 9.6 Libramiento Norte Carr. Irapuato-León. C. P. 36824, Irapuato, Guanajuato, México
| | - Ma Isabel Cristina Elizarraraz-Anaya
- Department of Biotechnology and Biochemistry, Cinvestav Unidad Irapuato. Km. 9.6 Libramiento Norte Carr. Irapuato-León. C. P. 36824, Irapuato, Guanajuato, México
| | - Josaphat Montero-Vargas
- Department of Biotechnology and Biochemistry, Cinvestav Unidad Irapuato. Km. 9.6 Libramiento Norte Carr. Irapuato-León. C. P. 36824, Irapuato, Guanajuato, México
| | - Robert Winkler
- Department of Biotechnology and Biochemistry, Cinvestav Unidad Irapuato. Km. 9.6 Libramiento Norte Carr. Irapuato-León. C. P. 36824, Irapuato, Guanajuato, México
| | - Lourdes Macías-Rodríguez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, México.
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Flores A, Diaz-Zamora JT, Orozco-Mosqueda MDC, Chávez A, de Los Santos-Villalobos S, Valencia-Cantero E, Santoyo G. Bridging genomics and field research: draft genome sequence of Bacillus thuringiensis CR71, an endophytic bacterium that promotes plant growth and fruit yield in Cucumis sativus L. 3 Biotech 2020; 10:220. [PMID: 32355594 DOI: 10.1007/s13205-020-02209-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/15/2020] [Indexed: 12/16/2022] Open
Abstract
Here we report the draft genome sequence of bacterial strain CR71, consisting of a single chromosome with 5,914,775 base pairs (bp), 34.7% G + C content, and 5733 protein-coding genes. Phylogenetic analysis indicates that the CR71 strain is affiliated with Bacillus thuringiensis species, with an average nucleotide identity > 96% and genome to genome distance > 70%. The genome of B. thuringiensis strain CR71 contains genes potentially involved in a wide variety of both plant pathogen-antagonistic and plant-growth-promoting activities, such as biofilm production; acetoin, butanediol, and indoleacetic acid (IAA) synthesis; production of quorum-sensing molecules; synthesis of toxins and lytic enzymes; and promotion of tolerance to oxidative, metal, and salt stress. Additionally, antiSMASH analysis revealed a potential synthesis of siderophores and peptide antibiotics. To confirm the in silico data, strain CR71 was inoculated into cucumber plants (Cucumis sativus L.) in a field trial, in which we observed an increase in stem thickness, as well as shoot fresh weight and length. Importantly, compared to un-inoculated control plants, plants inoculated with strain CR71 increased the size/weight ratio of cucumber fruits (34.99%), biovolume index (16.8%), and total fruit yield (34.97%). In conclusion, genome analysis of strain CR71 confirmed multifactorial plant-beneficial mechanisms and the potential of CR71 as an agricultural bio-inoculant.
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Affiliation(s)
- Aurora Flores
- 1Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, 58030 Morelia, Michoacán México
| | - J Trinidad Diaz-Zamora
- 2Facultad de Agrobiología "Presidente Juárez", Universidad Michoacana de San Nicolás de Hidalgo (UMSNH), Paseo Lázaro Cárdenas S/N Esq. Berlín, Col. Viveros, 60190 Uruapan, Michoacán México
| | - Ma Del Carmen Orozco-Mosqueda
- 2Facultad de Agrobiología "Presidente Juárez", Universidad Michoacana de San Nicolás de Hidalgo (UMSNH), Paseo Lázaro Cárdenas S/N Esq. Berlín, Col. Viveros, 60190 Uruapan, Michoacán México
| | - Ana Chávez
- 2Facultad de Agrobiología "Presidente Juárez", Universidad Michoacana de San Nicolás de Hidalgo (UMSNH), Paseo Lázaro Cárdenas S/N Esq. Berlín, Col. Viveros, 60190 Uruapan, Michoacán México
| | | | - Eduardo Valencia-Cantero
- 1Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, 58030 Morelia, Michoacán México
| | - Gustavo Santoyo
- 1Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, 58030 Morelia, Michoacán México
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12
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Flores-Cortez I, Winkler R, Ramírez-Ordorica A, Elizarraraz-Anaya MIC, Carrillo-Rayas MT, Valencia-Cantero E, Macías-Rodríguez L. A Mass Spectrometry-Based Study Shows that Volatiles Emitted by Arthrobacter agilis UMCV2 Increase the Content of Brassinosteroids in Medicago truncatula in Response to Iron Deficiency Stress. Molecules 2019; 24:E3011. [PMID: 31434211 PMCID: PMC6719008 DOI: 10.3390/molecules24163011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 08/09/2019] [Accepted: 08/10/2019] [Indexed: 11/17/2022] Open
Abstract
Iron is an essential plant micronutrient. It is a component of numerous proteins and participates in cell redox reactions; iron deficiency results in a reduction in nutritional quality and crop yields. Volatiles from the rhizobacterium Arthrobacter agilis UMCV2 induce iron acquisition mechanisms in plants. However, it is not known whether microbial volatiles modulate other metabolic plant stress responses to reduce the negative effect of iron deficiency. Mass spectrometry has great potential to analyze metabolite alterations in plants exposed to biotic and abiotic factors. Direct liquid introduction-electrospray-mass spectrometry was used to study the metabolite profile in Medicago truncatula due to iron deficiency, and in response to microbial volatiles. The putatively identified compounds belonged to different classes, including pigments, terpenes, flavonoids, and brassinosteroids, which have been associated with defense responses against abiotic stress. Notably, the levels of these compounds increased in the presence of the rhizobacterium. In particular, the analysis of brassinolide by gas chromatography in tandem with mass spectrometry showed that the phytohormone increased ten times in plants grown under iron-deficient growth conditions and exposed to microbial volatiles. In this mass spectrometry-based study, we provide new evidence on the role of A. agilis UMCV2 in the modulation of certain compounds involved in stress tolerance in M. truncatula.
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Affiliation(s)
- Idolina Flores-Cortez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edifico B3, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico
| | - Robert Winkler
- Department of Biotechnology and Biochemistry, Cinvestav Unidad Irapuato, Irapuato, Km 9.6 Libramiento Norte Carr. Irapuato-León, Guanajuato 36824, Mexico
| | - Arturo Ramírez-Ordorica
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edifico B3, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico
| | - Ma Isabel Cristina Elizarraraz-Anaya
- Department of Biotechnology and Biochemistry, Cinvestav Unidad Irapuato, Irapuato, Km 9.6 Libramiento Norte Carr. Irapuato-León, Guanajuato 36824, Mexico
| | - María Teresa Carrillo-Rayas
- Department of Biotechnology and Biochemistry, Cinvestav Unidad Irapuato, Irapuato, Km 9.6 Libramiento Norte Carr. Irapuato-León, Guanajuato 36824, Mexico
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edifico B3, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico
| | - Lourdes Macías-Rodríguez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edifico B3, Ciudad Universitaria, Morelia 58030, Michoacán, Mexico.
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Vázquez-Chimalhua E, Ruíz-Herrera LF, Barrera-Ortiz S, Valencia-Cantero E, López-Bucio J. The bacterial volatile dimethyl-hexa-decylamine reveals an antagonistic interaction between jasmonic acid and cytokinin in controlling primary root growth of Arabidopsis seedlings. Protoplasma 2019; 256:643-654. [PMID: 30382422 DOI: 10.1007/s00709-018-1327-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 10/23/2018] [Indexed: 05/19/2023]
Abstract
Chemical communication underlies major adaptive traits in plants and shapes the root microbiome. An increasing number of diffusible and/or volatile organic compounds released by bacteria have been identified, which play phytostimulant or protective functions, including dimethyl-hexa-decylamine (DMHDA), a volatile biosynthesized by Arthrobacter agilis UMCV2 that induces jasmonic acid (JA) signaling in Arabidopsis. Here, he found that the growth repressing effects of both DMHDA and JA are antagonized by kinetin and correlated with an inhibition of cytokinin-related ARR5::GUS and TCS::GFP expression in Arabidopsis primary roots. Moreover, we demonstrate that shoot supplementation of JA triggers JAZ1 expression both locally and systemically and represses cytokinin-dependent promoter activity in roots. A similar effect was observed after cotyledon wounding, in which an increase of JA-inducible LOX2:GUS expression represses root growth, which correlates with the loss of TCS::GFP detection at the very root tip. Our data demonstrate that the bacterial volatile DMHDA crosstalks with cytokinin signaling and reveals the downstream antagonistic interaction between JA and cytokinin in controlling root growth.
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Affiliation(s)
- Ernesto Vázquez-Chimalhua
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio A1', Ciudad Universitaria, C. P, 58030, Morelia, Michoacán, México
| | - León Francisco Ruíz-Herrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio A1', Ciudad Universitaria, C. P, 58030, Morelia, Michoacán, México
| | - Salvador Barrera-Ortiz
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio A1', Ciudad Universitaria, C. P, 58030, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio A1', Ciudad Universitaria, C. P, 58030, Morelia, Michoacán, México.
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio A1', Ciudad Universitaria, C. P, 58030, Morelia, Michoacán, México.
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Prieto-Barajas CM, Elorza-Gómez JC, Loeza-Lara PD, Sánchez-Yáñez JM, Valencia-Cantero E, Santoyo G. Identificación y análisis de genes ars en cepas de Bacillus hipertolerantes al arsénico, aisladas de pozas termales en Araró, México. TIP RECQB 2018. [DOI: 10.22201/fesz.23958723e.2018.0.145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
En este trabajo investigamos la presencia, diversidad y relaciones filogenéticas de genes asociados a la tolerancia al arsénico (As) en 37 cepas del género Bacillus, aisladas de tapetes microbianos localizados en pozas termales en Araró, Michoacán, México. Se diseñaron oligonucleótidos específicos para la amplificación por PCR de los genes arsB (bomba de expulsión de arsenito) y arsC (arsenato reductasa), ACR3 (transportador de arsenito) y aoxB (arsenito oxidasa) del género Bacillus, detectando únicamente los genes arsB y arsC en 21 de las 37 cepas analizadas (56.7% del total). Los análisis tipo Blastx demuestran una alta identidad (84-100%) con bombas de expulsión de arsenito (ArsB) y proteínas arsenato reductasas (ArsC) de diversas cepas de los géneros Bacillus, Paenibacillus, Psychrobacter y Planococcus. Dichos análisis se confirmaron a través de la construcción de filogenias de los genes arsB y arsC. La detección de los genes arsB y arsC en cepas de Bacillus se correlacionó con valores de hipertolerancia al As, los cuales correspondieron a 32 y 128 mM de arsenito (III) y arsenato (V), respectivamente. Finalmente, los genes arsB y arsC identificados en cepas de Bacillus podrían ser un mecanismo de resistencia al arsénico en un ambiente acuático extremo, como las pozas termales de Araró.
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Hernández-Calderón E, Aviles-Garcia ME, Castulo-Rubio DY, Macías-Rodríguez L, Ramírez VM, Santoyo G, López-Bucio J, Valencia-Cantero E. Volatile compounds from beneficial or pathogenic bacteria differentially regulate root exudation, transcription of iron transporters, and defense signaling pathways in Sorghum bicolor. Plant Mol Biol 2018; 96:291-304. [PMID: 29330694 DOI: 10.1007/s11103-017-0694-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 12/17/2017] [Indexed: 05/06/2023]
Abstract
Our results show that Sorghum bicolor is able to recognize bacteria through its volatile compounds and differentially respond to beneficial or pathogens via eliciting nutritional or defense adaptive traits. Plants establish beneficial, harmful, or neutral relationships with bacteria. Plant growth promoting rhizobacteria (PGPR) emit volatile compounds (VCs), which may act as molecular cues influencing plant development, nutrition, and/or defense. In this study, we compared the effects of VCs produced by bacteria with different lifestyles, including Arthrobacter agilis UMCV2, Bacillus methylotrophicus M4-96, Sinorhizobium meliloti 1021, the plant pathogen Pseudomonas aeruginosa PAO1, and the commensal rhizobacterium Bacillus sp. L2-64, on S. bicolor. We show that VCs from all tested bacteria, except Bacillus sp. L2-64, increased biomass and chlorophyll content, and improved root architecture, but notheworthy A. agilis induced the release of attractant molecules, whereas P. aeruginosa activated the exudation of growth inhibitory compounds by roots. An analysis of the expression of iron-transporters SbIRT1, SbIRT2, SbYS1, and SbYS2 and genes related to plant defense pathways COI1 and PR-1 indicated that beneficial, pathogenic, and commensal bacteria could up-regulate iron transporters, whereas only beneficial and pathogenic species could induce a defense response. These results show how S. bicolor could recognize bacteria through their volatiles profiles and highlight that PGPR or pathogens can elicit nutritional or defensive traits in plants.
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Affiliation(s)
- Erasto Hernández-Calderón
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México
| | - Maria Elizabeth Aviles-Garcia
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México
| | - Diana Yazmín Castulo-Rubio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México
| | - Lourdes Macías-Rodríguez
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México
| | - Vicente Montejano Ramírez
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México
| | - Gustavo Santoyo
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, 58030, Morelia, Michoacán, México.
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16
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Prieto-Barajas CM, Valencia-Cantero E, Santoyo G. Microbial mat ecosystems: Structure types, functional diversity, and biotechnological application. ELECTRON J BIOTECHN 2018. [DOI: 10.1016/j.ejbt.2017.11.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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17
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Muñoz-Parra E, Salmerón Barrera G, Ruiz-Herrera LF, Valencia-Cantero E, López-Bucio J. Self-plant perception via long-distance signaling. Plant Signal Behav 2017; 12:e1404218. [PMID: 29125418 PMCID: PMC5792132 DOI: 10.1080/15592324.2017.1404218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 11/02/2017] [Accepted: 11/03/2017] [Indexed: 06/07/2023]
Abstract
Plant growth and development are influenced by the interactions with other organisms including bacteria, fungi, herbivores and neighboring plants. Plant density influences the phase transitions during the entire life cycle and root architecture through a mechanism involving auxin and MEDIATOR 25 in Arabidopsis thaliana, but the nature of the signals that are perceived in response to increasing number of neighbors remains elusive. Here, we report that plant-plant perception can occur distantly, since root growth and auxin response in Arabidopsis seedlings grown at high plant density into half-divided Petri plates, decreased both primary root growth and lateral root formation in comparison with single plants grown alone, which correlates with reduced auxin response at the primary root tip. It is possible that a diffusible, yet unidentified volatile can be perceived by neighbors to synchronize physiological and developmental behavior.
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Affiliation(s)
- Edith Muñoz-Parra
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo.Edificio B3, Ciudad Universitaria. C. P., Morelia, Michoacán, México
| | - Guadalupe Salmerón Barrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo.Edificio B3, Ciudad Universitaria. C. P., Morelia, Michoacán, México
| | - León Francisco Ruiz-Herrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo.Edificio B3, Ciudad Universitaria. C. P., Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo.Edificio B3, Ciudad Universitaria. C. P., Morelia, Michoacán, México
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo.Edificio B3, Ciudad Universitaria. C. P., Morelia, Michoacán, México
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18
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Pérez-Flores P, Valencia-Cantero E, Altamirano-Hernández J, Pelagio-Flores R, López-Bucio J, García-Juárez P, Macías-Rodríguez L. Bacillus methylotrophicus M4-96 isolated from maize (Zea mays) rhizoplane increases growth and auxin content in Arabidopsis thaliana via emission of volatiles. Protoplasma 2017; 254:2201-2213. [PMID: 28405774 DOI: 10.1007/s00709-017-1109-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 04/03/2017] [Indexed: 05/17/2023]
Abstract
Plant growth-promoting rhizobacteria stimulate plant growth and development via different mechanisms. In this study, we characterized the effect of volatiles from Bacillus methylotrophicus M4-96 isolated from the maize rhizosphere on root and shoot development, and auxin homeostasis in Arabidopsis thaliana. Phytostimulation occurred after 4 days of interaction between M4-96 and Arabidopsis grown on opposite sides of divided Petri plates, as revealed by enhanced primary root growth, root branching, leaf formation, and shoot biomass accumulation. Analysis of indole-3-acetic acid content revealed two- and threefold higher accumulation in the shoot and root of bacterized seedlings, respectively, compared to uninoculated plants, which was correlated with increased expression of the auxin response marker DR5::GUS. The auxin transport inhibitor 1-naphthylphthalamic acid inhibited primary root growth and lateral root formation in axenically grown seedlings and antagonized the plant growth-promoting effects of M4-96. Analysis of bacterial volatile compounds revealed the presence of four classes of compounds, including ten ketones, eight alcohols, one aldehyde, and two hydrocarbons. However, the abundance of ketones and alcohols represented 88.73 and 8.05%, respectively, of all airborne signals detected, with acetoin being the main compound produced. Application of acetoin had a different effect from application of volatiles, suggesting that either the entire pool or acetoin acting in concert with another unidentified compound underlies the strong phytostimulatory response. Taken together, our results show that B. methylotrophicus M4-96 generates bioactive volatiles that increase the active auxin pool of plants, stimulate the growth and formation of new organs, and reprogram root morphogenesis.
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Affiliation(s)
- Paola Pérez-Flores
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, CP 58030, Morelia, Michoacán, Mexico
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, CP 58030, Morelia, Michoacán, Mexico
| | - Josué Altamirano-Hernández
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, CP 58030, Morelia, Michoacán, Mexico
| | - Ramón Pelagio-Flores
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, CP 58030, Morelia, Michoacán, Mexico
| | - José López-Bucio
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, CP 58030, Morelia, Michoacán, Mexico
| | - Perla García-Juárez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, CP 58030, Morelia, Michoacán, Mexico
| | - Lourdes Macías-Rodríguez
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edifico B3, Ciudad Universitaria, CP 58030, Morelia, Michoacán, Mexico.
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Prieto-Barajas CM, Alfaro-Cuevas R, Valencia-Cantero E, Santoyo G. Effect of seasonality and physicochemical parameters on bacterial communities in two hot spring microbial mats from Araró, Mexico. REV MEX BIODIVERS 2017. [DOI: 10.1016/j.rmb.2017.07.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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20
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Muñoz-Parra E, Pelagio-Flores R, Raya-González J, Salmerón-Barrera G, Ruiz-Herrera LF, Valencia-Cantero E, López-Bucio J. Plant-plant interactions influence developmental phase transitions, grain productivity and root system architecture in Arabidopsis via auxin and PFT1/MED25 signalling. Plant Cell Environ 2017; 40:1887-1899. [PMID: 28556372 DOI: 10.1111/pce.12993] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 05/15/2017] [Indexed: 05/08/2023]
Abstract
Transcriptional regulation of gene expression influences plant growth, environmental interactions and plant-plant communication. Here, we report that population density is a key factor for plant productivity and a major root architectural determinant in Arabidopsis thaliana. When grown in soil at varied densities from 1 to 32 plants, high number of individuals decreased stem growth and accelerated senescence, which negatively correlated with total plant biomass and seed production at the completion of the life cycle. Root morphogenesis was also a major trait modulated by plant density, because an increasing number of individuals grown in vitro showed repression of primary root growth, lateral root formation and root hair development while affecting auxin-regulated gene expression and the levels of auxin transporters PIN1 and PIN2. We also found that mutation of the Mediator complex subunit PFT1/MED25 renders plants insensitive to high density-modulated root traits. Our results suggest that plant density is critical for phase transitions, productivity and root system architecture and reveal a role of Mediator in self-plant recognition.
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Affiliation(s)
- Edith Muñoz-Parra
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - Ramón Pelagio-Flores
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - Javier Raya-González
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - Guadalupe Salmerón-Barrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - León Francisco Ruiz-Herrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
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Raya-González J, Velázquez-Becerra C, Barrera-Ortiz S, López-Bucio J, Valencia-Cantero E. N,N-dimethyl hexadecylamine and related amines regulate root morphogenesis via jasmonic acid signaling in Arabidopsis thaliana. Protoplasma 2017; 254:1399-1410. [PMID: 27696021 DOI: 10.1007/s00709-016-1031-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Accepted: 09/20/2016] [Indexed: 05/19/2023]
Abstract
Plant growth-promoting rhizobacteria are natural inhabitants of roots, colonize diverse monocot and dicot species, and affect several functional traits such as root architecture, adaptation to adverse environments, and protect plants from pathogens. N,N-dimethyl-hexadecylamine (C16-DMA) is a rhizobacterial amino lipid that modulates the postembryonic development of several plants, likely as part of volatile blends. In this work, we evaluated the bioactivity of C16-DMA and other related N,N-dimethyl-amines with varied length and found that inhibition of primary root growth was related to the length of the acyl chain. C16-DMA inhibited primary root growth affecting cell division and elongation, while promoting lateral root formation and root hair growth and density in Arabidopsis thaliana (Arabidopsis) wild-type (WT) seedlings. Interestingly, C16-DMA induced the expression of the jasmonic acid (JA)-responsive gene marker pLOX2:uidA, while JA-related mutants jar1, coi1-1, and myc2 affected on JA biosynthesis and perception, respectively, are compromised in C16-DMA responses. Comparison of auxin-regulated gene expression, root architectural changes in WT, and auxin-related mutants aux1-7, tir1/afb2/afb3, and arf7-1/arf19-1 to C16-DMA shows that the C16-DMA effects occur independently of auxin signaling. Together, these results reveal a novel class of aminolipids modulating root organogenesis via crosstalk with the JA signaling pathway.
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Affiliation(s)
- Javier Raya-González
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - Crisanto Velázquez-Becerra
- Facultad de Ingeniería en Tecnología de la Madera, Universidad Michoacana de San Nicolás de Hidalgo, Edificio D, Ciudad Universitaria, C.P. 58030, Morelia, Michoacán, Mexico
| | - Salvador Barrera-Ortiz
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, C. P. 58030, Morelia, Michoacán, Mexico.
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Aviles-Garcia ME, Flores-Cortez I, Hernández-Soberano C, Santoyo G, Valencia-Cantero E. [The plant growth-promoting rhizobacterium Arthrobacter agilis UMCV2 endophytically colonizes Medicago truncatula]. Rev Argent Microbiol 2016; 48:342-346. [PMID: 27916328 DOI: 10.1016/j.ram.2016.07.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 04/06/2016] [Accepted: 07/07/2016] [Indexed: 11/25/2022] Open
Abstract
Arthrobacter agilis UMCV2 is a rhizosphere bacterium that promotes legume growth by solubilization of iron, which is supplied to the plant. A second growth promotion mechanism produces volatile compounds that stimulate iron uptake activities. Additionally, A. agilis UMCV2 is capable of inhibiting the growth of phytopathogens. A combination of quantitative polymerase chain reaction and fluorescence in situ hybridization techniques were used here to detect and quantify the presence of the bacterium in the internal tissues of the legume Medicago truncatula. Our results demonstrate that A. agilis UMCV2 behaves as an endophytic bacterium of M. truncatula, particularly in environments where iron is available.
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Affiliation(s)
- Maria Elizabeth Aviles-Garcia
- Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Químico-Biológicas, Edificio B5, Ciudad Universitaria, Morelia, Michoacán, México
| | - Idolina Flores-Cortez
- Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Químico-Biológicas, Edificio B5, Ciudad Universitaria, Morelia, Michoacán, México
| | - Christian Hernández-Soberano
- Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Químico-Biológicas, Edificio B5, Ciudad Universitaria, Morelia, Michoacán, México
| | - Gustavo Santoyo
- Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Químico-Biológicas, Edificio B5, Ciudad Universitaria, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Universidad Michoacana de San Nicolás de Hidalgo, Instituto de Investigaciones Químico-Biológicas, Edificio B5, Ciudad Universitaria, Morelia, Michoacán, México.
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Hernández-Salmerón JE, Hernández-León R, Orozco-Mosqueda MDC, Valencia-Cantero E, Moreno-Hagelsieb G, Santoyo G. Draft Genome Sequence of the Biocontrol and Plant Growth-Promoting Rhizobacterium Pseudomonas fluorescens strain UM270. Stand Genomic Sci 2016; 11:5. [PMID: 26767092 PMCID: PMC4711069 DOI: 10.1186/s40793-015-0123-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 09/09/2015] [Indexed: 11/10/2022] Open
Abstract
The Pseudomonas fluorescens strain UM270 was isolated form the rhizosphere of wild Medicago spp. A previous work has shown that this pseudomonad isolate was able to produce diverse diffusible and volatile compounds involved in plant protection and growth promotion. Here, we present the draft genome sequence of the rhizobacterium P. fluorescens strain UM270. The sequence covers 6,047,974 bp of a single chromosome, with 62.66 % G + C content and no plasmids. Genome annotations predicted 5,509 genes, 5,396 coding genes, 59 RNA genes and 110 pseudogenes. Genome sequence analysis revealed the presence of genes involved in biological control and plant-growth promoting activities. We anticipate that the P. fluorescens strain UM270 genome will contribute insights about bacterial plant protection and beneficial properties through genomic comparisons among fluorescent pseudomonads.
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Affiliation(s)
- Julie E. Hernández-Salmerón
- />Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán México
| | - Rocio Hernández-León
- />Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán México
| | - Ma. Del Carmen Orozco-Mosqueda
- />Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán México
| | - Eduardo Valencia-Cantero
- />Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán México
| | | | - Gustavo Santoyo
- />Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán México
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24
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Orozco-Mosqueda MDC, Valencia-Cantero E, López-Albarrán P, Martínez-Pacheco M, Velázquez-Becerra C. [Bacterium Arthrobacter agilis UMCV2 and diverse amines inhibit in vitro growth of wood-decay fungi]. Rev Argent Microbiol 2015; 47:219-28. [PMID: 26350556 DOI: 10.1016/j.ram.2015.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 06/04/2015] [Accepted: 06/16/2015] [Indexed: 10/23/2022] Open
Abstract
The kingdom Fungi is represented by a large number of organisms, including pathogens that deteriorate the main structural components of wood, such as cellulose, hemicellulose and lignin. The aim of our work was to characterize the antifungal activity in Arthrobacter agilis UMCV2 and diverse amines against wood-decaying fungi. Four fungal organisms (designated as UMTM) were isolated from decaying wood samples obtained from a forest in Cuanajo-Michoacán, México. Two of them showed a clear enzymatic activity of cellulases, xylanases and oxido-reducing enzymes and were identified as Hypocrea (UMTM3 isolate) and Fusarium (UMTM13 isolate). In vitro, the amines showed inhibitory effect against UMTM growth and one of the amines, dimethylhexadecylamine (DMA16), exhibited strong potential as wood preventive treatment, against the attack of decaying fungi.
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Affiliation(s)
- M Del Carmen Orozco-Mosqueda
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | - Eduardo Valencia-Cantero
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | - Pablo López-Albarrán
- Facultad de Ingeniería en Tecnología de la Madera, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | - Mauro Martínez-Pacheco
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
| | - Crisanto Velázquez-Becerra
- Facultad de Ingeniería en Tecnología de la Madera, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México.
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Valencia-Cantero E, Peña-Cabriales JJ. Effects of iron-reducing bacteria on carbon steel corrosion induced by thermophilic sulfate-reducing consortia. J Microbiol Biotechnol 2015; 24:280-6. [PMID: 24225375 DOI: 10.4014/jmb.1310.10002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Four thermophilic bacterial species, including the iron-reducing bacterium Geobacillus sp. G2 and the sulfate-reducing bacterium Desulfotomaculum sp. SRB-M, were employed to integrate a bacterial consortium. A second consortium was integrated with the same bacteria, except for Geobacillus sp. G2. Carbon steel coupons were subjected to batch cultures of both consortia. The corrosion induced by the complete consortium was 10 times higher than that induced by the second consortium, and the ferrous ion concentration was consistently higher in iron-reducing consortia. Scanning electronic microscopy analysis of the carbon steel surface showed mineral films colonized by bacteria. The complete consortium caused profuse fracturing of the mineral film, whereas the non-iron-reducing consortium did not generate fractures. These data show that the iron-reducing activity of Geobacillus sp. G2 promotes fracturing of mineral films, thereby increasing steel corrosion.
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Affiliation(s)
- Eduardo Valencia-Cantero
- Chemical and Biology Research Institute, Michoacan University of San Nicolas of Hidalgo (UMSNH), 58030 Michoacan, Mexico
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Hernandez-Salmeron J, Prieto-Barajas C, Valencia-Cantero E, Moreno-Hagelsieb G, Santoyo G. Isolation and characterization of genetic variability in bacteria with β-hemolytic and antifungal activity isolated from the rhizosphere of Medicago truncatula plants. Genet Mol Res 2014; 13:4967-75. [DOI: 10.4238/2014.july.4.11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Velázquez-Becerra C, Macías-Rodríguez LI, López-Bucio J, Flores-Cortez I, Santoyo G, Hernández-Soberano C, Valencia-Cantero E. The rhizobacterium Arthrobacter agilis produces dimethylhexadecylamine, a compound that inhibits growth of phytopathogenic fungi in vitro. Protoplasma 2013; 250:1251-62. [PMID: 23674267 DOI: 10.1007/s00709-013-0506-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 04/24/2013] [Indexed: 05/19/2023]
Abstract
Plant diseases caused by fungal pathogens such as Botrytis cinerea and the oomycete Phytophthora cinnamomi affect agricultural production worldwide. Control of these pests can be done by the use of fungicides such as captan, which may have deleterious effects on human health. This study demonstrates that the rhizobacterium Arthrobacter agilis UMCV2 produces volatile organic compounds that inhibit the growth of B. cinerea in vitro. A single compound from the volatile blends, namely dimethylhexadecylamine (DMHDA), could inhibit the growth of both B. cinerea and P. cinnamomi when supplied to the growth medium in low concentrations. DMHDA also inhibited the growth of beneficial fungi Trichoderma virens and Trichoderma atroviride but at much higher concentrations. DMHDA-related aminolipids containing 4, 8, 10, 12, and 14 carbons in the alkyl chain were tested for their inhibitory effect on the growth of the pathogens. The results show that the most active compound from those tested was dimethyldodecylamine. This effect correlates with a decrease in the number of membrane lipids present in the mycelium of the pathogen including eicosanoic acid, (Z)-9-hexadecenoic acid, methyl ester, and (Z)-9-octadecenoic acid, methyl ester. Strawberry leaflets treated with DMHDA were not injured by the compound. These data indicate that DMHDA and related compounds, which can be produced by microorganisms may effectively inhibit the proliferation of certain plant pathogens.
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Affiliation(s)
- Crisanto Velázquez-Becerra
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B5, Ciudad Universitaria, C.P. 58030, Morelia, Michoacán, México
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28
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29
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Orozco-Mosqueda MDC, Macías-Rodríguez LI, Santoyo G, Farías-Rodríguez R, Valencia-Cantero E. Medicago truncatula increases its iron-uptake mechanisms in response to volatile organic compounds produced by Sinorhizobium meliloti. Folia Microbiol (Praha) 2013; 58:579-85. [PMID: 23564626 DOI: 10.1007/s12223-013-0243-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Accepted: 03/15/2013] [Indexed: 10/27/2022]
Abstract
Medicago truncatula represents a model plant species for understanding legume-bacteria interactions. M. truncatula roots form a specific root-nodule symbiosis with the nitrogen-fixing bacterium Sinorhizobium meliloti. Symbiotic nitrogen fixation generates high iron (Fe) demands for bacterial nitrogenase holoenzyme and plant leghemoglobin proteins. Leguminous plants acquire Fe via "Strategy I," which includes mechanisms such as rhizosphere acidification and enhanced ferric reductase activity. In the present work, we analyzed the effect of S. meliloti volatile organic compounds (VOCs) on the Fe-uptake mechanisms of M. truncatula seedlings under Fe-deficient and Fe-rich conditions. Axenic cultures showed that both plant and bacterium modified VOC synthesis in the presence of the respective symbiotic partner. Importantly, in both Fe-rich and -deficient experiments, bacterial VOCs increased the generation of plant biomass, rhizosphere acidification, ferric reductase activity, and chlorophyll content in plants. On the basis of our results, we propose that M. truncatula perceives its symbiont through VOC emissions, and in response, increases Fe-uptake mechanisms to facilitate symbiosis.
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Affiliation(s)
- Maria del Carmen Orozco-Mosqueda
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B5 Ciudad Universitaria, Morelia, Michoacán, Mexico, C.P. 58030
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30
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Del C Orozco-Mosqueda M, Santoyo G, Farías-Rodríguez R, Macías-Rodríguez L, Valencia-Cantero E. Identification and expression analysis of multiple FRO gene copies in Medicago truncatula. Genet Mol Res 2012; 11:4402-10. [PMID: 23096909 DOI: 10.4238/2012.october.9.7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Iron (Fe) is an essential element for plant growth. Commonly, this element is found in an oxidized form in soil, which is poorly available for plants. Therefore, plants have evolved ferric-chelate reductase enzymes (FRO) to reduce iron into a more soluble ferrous form. Fe scarcity in plants induce the FRO enzyme activity. Although the legume Medicago truncatula has been employed as a model for FRO activity studies, only one copy of the M. truncatula MtFRO1 gene has been characterized so far. In this study, we identified multiple gene copies of the MtFRO gene in the genome of M. truncatula by an in silico search, using BLAST analysis in the database of the M. truncatula Genome Sequencing Project and the National Center for Biotechnology Information, and also determined whether they are functional. We identified five genes apart from MtFRO1, which had been already characterized. All of the MtFRO genes exhibited high identity with homologous FRO genes from Lycopersicon esculentum, Citrus junos and Arabidopsis thaliana. The gene copies also presented characteristic conserved FAD and NADPH motifs, transmembrane regions and oxidoreductase signature motifs. We also detected expression in five of the putative MtFRO sequences by semiquantitative RT-PCR analysis, performed with mRNA from root and shoot tissues. Iron scarcity might be a condition for an elevated expression of the MtFRO genes observed in different M. truncatula tissues.
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Affiliation(s)
- Ma Del C Orozco-Mosqueda
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, México
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31
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Ballesteros-Almanza L, Altamirano-Hernandez J, Peña-Cabriales JJ, Santoyo G, Sanchez-Yañez JM, Valencia-Cantero E, Macias-Rodriguez L, Lopez-Bucio J, Cardenas-Navarro R, Farias-Rodriguez R. Effect of co-inoculation with mycorrhiza and rhizobia on the nodule trehalose content of different bean genotypes. Open Microbiol J 2010. [PMID: 21253462 PMCID: PMC3023947 DOI: 10.2174/1874285801004010083] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Studies on Rhizobium-legume symbiosis show that trehalose content in nodules under drought stress correlates positively with an increase in plant tolerance to this stress. Fewer reports describe trehalose accumulation in mycorrhiza where, in contrast with rhizobia, there is no flux of carbohydrates from the microsymbiont to the plant. However, the trehalose dynamics in the Mycorrhiza-Rhizobium-Legume tripartite symbiosis is unknown. The present study explores the role of this tripartite symbiosis in the trehalose content of nodules grown under contrasting moisture conditions. Three wild genotypes (P. filiformis, P. acutifolis and P. vulgaris) and two commercial genotypes of Phaseolus vulgaris (Pinto villa and Flor de Mayo) were used. Co-inoculation treatments were conducted with Glomus intraradices and a mixture of seven native rhizobial strains, and trehalose content was determined by GC/MS. The results showed a negative effect of mycorrhizal inoculation on nodule development, as mycorrhized plants showed fewer nodules and lower nodule dry weight compared to plants inoculated only with Rhizobium. Mycorrhizal colonization was also higher in plants inoculated only with Glomus as compared to plants co-inoculated with both microsymbionts. In regard to trehalose, co-inoculation negatively affects its accumulation in the nodules of each genotype tested. However, the correlation analysis showed a significantly positive correlation between mycorrhizal colonization and nodule trehalose content.
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Affiliation(s)
- L Ballesteros-Almanza
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1 Ciudad Universitaria. Morelia, Michoacan, Mexico
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32
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Ballesteros-Almanza L, Altamirano-Hernandez J, Peña-Cabriales J, Santoyo G, Sanchez-Yañez J, Valencia-Cantero E, Macias-Rodriguez L, Lopez-Bucio J, Cardenas-Navarro R, Farias-Rodriguez R. Effect of co-inoculation with mycorrhiza and rhizobia on the nodule trehalose content of different bean genotypes. Open Microbiol J 2010; 4:83-92. [PMID: 21253462 PMCID: PMC3023947 DOI: 10.2174/11874285801004010083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 06/17/2010] [Accepted: 06/25/2010] [Indexed: 11/22/2022] Open
Abstract
Studies on Rhizobium-legume symbiosis show that trehalose content in nodules under drought stress correlates positively with an increase in plant tolerance to this stress. Fewer reports describe trehalose accumulation in mycorrhiza where, in contrast with rhizobia, there is no flux of carbohydrates from the microsymbiont to the plant. However, the trehalose dynamics in the Mycorrhiza-Rhizobium-Legume tripartite symbiosis is unknown. The present study explores the role of this tripartite symbiosis in the trehalose content of nodules grown under contrasting moisture conditions. Three wild genotypes (P. filiformis, P. acutifolis and P. vulgaris) and two commercial genotypes of Phaseolus vulgaris (Pinto villa and Flor de Mayo) were used. Co-inoculation treatments were conducted with Glomus intraradices and a mixture of seven native rhizobial strains, and trehalose content was determined by GC/MS. The results showed a negative effect of mycorrhizal inoculation on nodule development, as mycorrhized plants showed fewer nodules and lower nodule dry weight compared to plants inoculated only with Rhizobium. Mycorrhizal colonization was also higher in plants inoculated only with Glomus as compared to plants co-inoculated with both microsymbionts. In regard to trehalose, co-inoculation negatively affects its accumulation in the nodules of each genotype tested. However, the correlation analysis showed a significantly positive correlation between mycorrhizal colonization and nodule trehalose content.
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Affiliation(s)
- L Ballesteros-Almanza
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
| | - J Altamirano-Hernandez
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
| | - J.J Peña-Cabriales
- Departamento de Biotecnologia y Bioquimica, CINVESTAV Campus Guanajuato. Km. 9.6 Carretera Salamanca-Leon. Irapuato, Guanajuato, Mexico
| | - G Santoyo
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
| | - J.M Sanchez-Yañez
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
| | - E Valencia-Cantero
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
| | - L Macias-Rodriguez
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
| | - J Lopez-Bucio
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
| | - R Cardenas-Navarro
- Instituto de Investigaciones Agropecuarias y Forestales. Universidad Michoacana de San Nicolas de Hidalgo, Km 9.5 Carretera Morelia-Zinapecuaro, Unidad Posta Zootecnica. Tarimbaro, Michoacan, Mexico
| | - R Farias-Rodriguez
- Instituto de Investigaciones Quimico-Biologicas. Universidad Michoacana de San Nicolas de Hidalgo, Edificio B1
Ciudad Universitaria. Morelia, Michoacan, Mexico
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Gutiérrez-Luna FM, López-Bucio J, Altamirano-Hernández J, Valencia-Cantero E, de la Cruz HR, Macías-Rodríguez L. Plant growth-promoting rhizobacteria modulate root-system architecture in Arabidopsis thaliana through volatile organic compound emission. Symbiosis 2010. [DOI: 10.1007/s13199-010-0066-2] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Orozco-Mosqueda MDC, Altamirano-Hernandez J, Farias-Rodriguez R, Valencia-Cantero E, Santoyo G. Homologous recombination and dynamics of rhizobial genomes. Res Microbiol 2009; 160:733-41. [DOI: 10.1016/j.resmic.2009.09.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2009] [Revised: 09/17/2009] [Accepted: 09/21/2009] [Indexed: 10/20/2022]
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Ortíz-Castro R, Valencia-Cantero E, López-Bucio J. Plant growth promotion by Bacillus megaterium involves cytokinin signaling. Plant Signal Behav 2008; 3:263-5. [PMID: 19704649 PMCID: PMC2634197 DOI: 10.4161/psb.3.4.5204] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2007] [Accepted: 10/25/2007] [Indexed: 05/19/2023]
Abstract
Accumulating evidence indicates that plant growth promoting rhizobacteria (PGPR) influence plant growth and development by the production of phytohormones such as auxins, gibberellins, and cytokinins. Little is known on the genetic basis and signal transduction components that mediate the beneficial effects of PGPRs in plants. We recently reported the identification of a Bacillus megaterium strain that promoted growth of A. thaliana and P. vulgaris seedlings. In this addendum, the role of cytokinin signaling in mediating the plant responses to bacterial inoculation was investigated using A. thaliana mutants lacking one, two or three of the putative cytokinin receptors CRE1, AHK2 and AHK3, and RPN12 a gene involved in cytokinin signaling. We show that plant growth promotion by B. megaterium is reduced in AHK2-2 single and double mutant combinations and in RPN12. Furthermore, the triple cytokinin-receptor CRE1-12/AHK2-2/AHK3-3 knockout was insensitive to inoculation in terms of growth promotion and root developmental responses. Our results indicate that cytokinin receptors play a complimentary role in plant growth promotion by B. megaterium.
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Affiliation(s)
- Randy Ortíz-Castro
- Instituto de Investigaciones Químico-Biológicas; Universidad Michoacana de San Nicolás de Hidalgo; Morelia, Michoacán, México
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López-Bucio J, Campos-Cuevas JC, Hernández-Calderón E, Velásquez-Becerra C, Farías-Rodríguez R, Macías-Rodríguez LI, Valencia-Cantero E. Bacillus megaterium rhizobacteria promote growth and alter root-system architecture through an auxin- and ethylene-independent signaling mechanism in Arabidopsis thaliana. Mol Plant Microbe Interact 2007; 20:207-17. [PMID: 17313171 DOI: 10.1094/mpmi-20-2-0207] [Citation(s) in RCA: 132] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Soil microorganisms are critical players in plant-soil interactions at the rhizosphere. We have identified a Bacillus megaterium strain that promoted growth and development of bean (Phaseolus vulgaris) and Arabidopsis thaliana plants. We used Arabidopsis thaliana as a model to characterize the effects of inoculation with B. megaterium on plant-growth promotion and postembryonic root development. B. megaterium inoculation caused an inhibition in primary-root growth followed by an increase in lateral-root number, lateral-root growth, and root-hair length. Detailed cellular analyses revealed that primary root-growth inhibition was caused both by a reduction in cell elongation and by reduction of cell proliferation in the root meristem. To study the contribution of auxin and ethylene signaling pathways in the alterations in root-system architecture elicited by B. megaterium, a suite of plant hormone mutants of Arabidopsis, including aux1-7, axr4-1, eir1, etr1, ein2, and rhd6, defective in either auxin or ethylene signaling, were evaluated for their responses to inoculation with this bacteria. When inoculated, all mutant lines tested showed increased biomass production. Moreover, aux1-7 and eir1, which sustain limited root-hair and lateral-root formation when grown in uninoculated medium, were found to increase the number of lateral roots and to develop long root hairs when inoculated with B. megaterium. The ethylene-signaling mutants etr1 and ein2 showed an induction in lateral-root formation and root-hair growth in response to bacterial inoculation. Taken together, our results suggest that plant-growth promotion and root-architectural alterations by B. megaterium may involve auxin- and-ethylene independent mechanisms.
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Affiliation(s)
- José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo. Edificio B3, Ciudad Universitaria, C. P. 58030 Morelia, Michoacán, México.
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