1
|
Tsalgatidou PC, Thomloudi EE, Delis C, Nifakos K, Zambounis A, Venieraki A, Katinakis P. Compatible Consortium of Endophytic Bacillus halotolerans Strains Cal.l.30 and Cal.f.4 Promotes Plant Growth and Induces Systemic Resistance against Botrytis cinerea. Biology (Basel) 2023; 12:779. [PMID: 37372064 DOI: 10.3390/biology12060779] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 05/20/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023]
Abstract
Evaluating microbial-based alternatives to conventional fungicides and biofertilizers enables us to gain a deeper understanding of the biocontrol and plant growth-promoting activities. Two genetically distinct Bacillus halotolerans strains (Cal.l.30, Cal.f.4) were evaluated for the levels of their compatibility. They were applied individually or in combination under in vitro and greenhouse conditions, using seed bio-priming and soil drenching as inoculum delivery systems, for their plant growth-promoting effect. Our data indicate that application of Cal.l.30 and Cal.f.4 as single strains and as a mixture significantly enhanced growth parameters of Arabidopsis and tomato plants. We investigated whether seed and an additional soil treatment with these strains could induce the expression of defense-related genes in leaves of young tomato seedling plants. These treatments mediated a long lasting, bacterial-mediated, systemic-induced resistance as evidenced by the high levels of expression of RP3, ACO1 and ERF1 genes in the leaves of young tomato seedlings. Furthermore, we presented data showing that seed and soil treatment with B. halotolerans strains resulted in an effective inhibition of Botrytis cinerea attack and development on tomato leaves. Our findings highlighted the potential of B. halotolerans strains as they combine both direct antifungal activity against plant pathogens and the ability to prime plant innate immunity and enhance plant growth.
Collapse
Affiliation(s)
- Polina C Tsalgatidou
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece
| | - Eirini-Evangelia Thomloudi
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Costas Delis
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece
| | - Kallimachos Nifakos
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece
| | - Antonios Zambounis
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization 'ELGO DIMITRA', 57001 Thessaloniki, Greece
| | - Anastasia Venieraki
- Laboratory of Plant Pathology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Panagiotis Katinakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| |
Collapse
|
2
|
Tsalgatidou PC, Thomloudi EE, Nifakos K, Delis C, Venieraki A, Katinakis P. Calendula officinalis-A Great Source of Plant Growth Promoting Endophytic Bacteria (PGPEB) and Biological Control Agents (BCA). Microorganisms 2023; 11:microorganisms11010206. [PMID: 36677498 PMCID: PMC9865722 DOI: 10.3390/microorganisms11010206] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/08/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
The application of beneficial bacteria may present an alternative approach to chemical plant protection and fertilization products as they enhance growth and resistance to biotic and abiotic stresses. Plant growth-promoting bacteria are found in the rhizosphere, epiphytically or endophytically (Plant Growth Promoting Endophytic Bacteria, PGPEB). In the present study, 36 out of 119 isolated endophytic bacterial strains from roots, leaves and flowers of the pharmaceutical plant Calendula officinalis were further identified and classified into Bacillus, Pseudomonas, Pantoea, Stenotrophomonas and Rhizobium genera. Selected endophytes were evaluated depending on positive reaction to different plant growth promoting (PGP) traits, motility, survival rate and inhibition of phytopathogenic fungi in vitro and ex vivo (tomato fruit). Bacteria were further assessed for their plant growth effect on Arabidopsis thaliana seedlings and on seed bio-primed tomato plantlets, in vitro. Our results indicated that many bacterial endophytes increased seed germination, promoted plant growth and changed root structure by increasing lateral root density and length and root hair formation. The most promising antagonistic PGPEB strains (Cal.r.29, Cal.l.30, Cal.f.4, Cal.l.11, Cal.f.2.1, Cal.r.19 and Cal.r.11) are indicated as effective biological control agents (BCA) against Botrytis cinerea on detached tomato fruits. Results underlie the utility of beneficial endophytic bacteria for sustainable and efficient crop production and disease control.
Collapse
Affiliation(s)
- Polina C. Tsalgatidou
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece
- Correspondence: (P.C.T.); (A.V.)
| | - Eirini-Evangelia Thomloudi
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Kallimachos Nifakos
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece
| | - Costas Delis
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece
| | - Anastasia Venieraki
- Laboratory of Plant Pathology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
- Correspondence: (P.C.T.); (A.V.)
| | - Panagiotis Katinakis
- Laboratory of General and Agricultural Microbiology, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| |
Collapse
|
3
|
Tsalgatidou PC, Thomloudi EE, Baira E, Papadimitriou K, Skagia A, Venieraki A, Katinakis P. Integrated Genomic and Metabolomic Analysis Illuminates Key Secreted Metabolites Produced by the Novel Endophyte Bacillus halotolerans Cal.l.30 Involved in Diverse Biological Control Activities. Microorganisms 2022; 10:microorganisms10020399. [PMID: 35208854 PMCID: PMC8877463 DOI: 10.3390/microorganisms10020399] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/01/2022] [Accepted: 02/04/2022] [Indexed: 12/15/2022] Open
Abstract
The endophytic strain Cal.l.30, isolated from the medicinal plant Calendula officinalis, was selected among seven Bacillus strains with plant growth promoting activity and strong biological potential against the postharvest fungal pathogen Botrytis cinerea. Treatment by inoculating Cal.l.30 bacterial cell culture or cell free supernatant on harvested grapes and cherry tomato fruits, significantly reduced gray mold disease severity index and disease incidence. Based on 16S rRNA sequence analysis and whole genome phylogeny, Cal.l.30 was identified as Bacillus halotolerans. Genome mining revealed that B. halotolerans Cal.l.30 is endowed with a diverse arsenal of secondary metabolite biosynthetic gene clusters (SM-BGCs) responsible for metabolite production with antimicrobial properties. A sub-set of the identified SM-BGCs (mojavensin A, ‘bacillunoic acid’) appears to be the result of recent horizontal gene transfer events. Its genome was also mined for CAZymes associated with antifungal activity. Further UHPLC-HRMS analysis indicated that Cal.l.30 synthesizes and secretes secondary metabolites with antimicrobial activity, including the lipopeptides, fengycin, surfactin and mojavensin A, bacillaene isoforms, L-dihydroanticapsin and bacillibactin. Other compounds with known antimicrobial activity were also detected, such as azelaic acid, 15- hydroxypentadecanoid acid and 2-hydroxyphenylacetic acid. The genomic and metabolomic features of the B. halotolerans Cal.l.30 provided new perspectives on the exploitation of novel Bacillus sp. as a biocontrol agent.
Collapse
Affiliation(s)
- Polina C. Tsalgatidou
- Laboratory of General and Agricultural Microbiology, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (P.C.T.); (E.-E.T.); (A.S.)
- Department of Agriculture, University of the Peloponnese, 24100 Kalamata, Greece
| | - Eirini-Evangelia Thomloudi
- Laboratory of General and Agricultural Microbiology, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (P.C.T.); (E.-E.T.); (A.S.)
| | - Eirini Baira
- Laboratory of Toxicological Control of Pesticides, Scientific Directorate of Pesticides’ Control and Phytopharmacy, Benaki Phytopathological Institute (BPI), Kifissia, 14561 Athens, Greece;
| | | | - Aggeliki Skagia
- Laboratory of General and Agricultural Microbiology, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (P.C.T.); (E.-E.T.); (A.S.)
| | - Anastasia Venieraki
- Laboratory of Plant Pathology, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
- Correspondence: (A.V.); (P.K.)
| | - Panagiotis Katinakis
- Laboratory of General and Agricultural Microbiology, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece; (P.C.T.); (E.-E.T.); (A.S.)
- Correspondence: (A.V.); (P.K.)
| |
Collapse
|
4
|
Bouranis DL, Venieraki A, Chorianopoulou SN, Katinakis P. Impact of Elemental Sulfur on the Rhizospheric Bacteria of Durum Wheat Crop Cultivated on a Calcareous Soil. Plants (Basel) 2019; 8:E379. [PMID: 31569773 PMCID: PMC6843240 DOI: 10.3390/plants8100379] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/24/2019] [Accepted: 09/25/2019] [Indexed: 11/16/2022]
Abstract
Previous experiments have shown that the application of fertilizer granules containing elemental sulfur (S0) as an ingredient (FBS0) in durum wheat crops produced a higher yield than that produced by conventional ones (F), provided that the soils of the experimental fields (F vs. FBS0) were of comparable quality and with the Olsen P content of the field's soil above 8 mg kg-1. In this experiment the FBS0 treatment took place in soil with Olsen P at 7.8 mg kg-1, compared with the F treatment's soil with Olsen P of 16.8 mg kg-1, aiming at reducing the imbalance in soil quality. To assess and evaluate the effect of FBS0 on the dynamics of the rhizospheric bacteria in relation to F, rhizospheric soil at various developmental stages of the crops was collected. The agronomic profile of the rhizospheric cultivable bacteria was characterized and monitored, in connection with the dynamics of phosphorus, iron, organic sulfur, and organic nitrogen, in both the rhizosoil and the aerial part of the plant during development. Both crops were characterized by a comparable dry mass accumulation per plant throughout development, while the yield of the FBS0 crop was 3.4% less compared to the F crop's one. The FBS0 crop's aerial part showed a transient higher P and Fe concentration, while its organic N and S concentrations followed the pattern of the F crop. The incorporation of S0 into the conventional fertilizer increased the percentage of arylsulfatase (ARS)-producing bacteria in the total bacterial population, suggesting an enhanced release of sulfate from the soil's organic S pool, which the plant could readily utilize. The proportion of identified ARS-producing bacteria possessing these traits exhibited a maximum value before and after topdressing. Phylogenetic analysis of the 68 isolated ARS-producing bacterial strains revealed that the majority of the isolates belonged to the Pseudomonas genus. A large fraction also possessed phosphate solubilization, and/or siderophore production, and/or ureolytic traits, thus improving the crop's P, Fe, S, and N balance. The aforementioned findings imply that the used FBS0 substantially improved the quality of the rhizosoil at the available phosphorus limiting level by modulating the abundance of the bacterial communities in the rhizosphere and effectively enhancing the microbially mediated nutrient mobilization towards improved plant nutritional dynamics.
Collapse
Affiliation(s)
- Dimitris L Bouranis
- Plant Physiology and Morphology Laboratory, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece.
| | - Anastasia Venieraki
- General and Agricultural Microbiology Laboratory, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece.
| | - Styliani N Chorianopoulou
- Plant Physiology and Morphology Laboratory, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece.
| | - Panagiotis Katinakis
- General and Agricultural Microbiology Laboratory, Crop Science Department, Agricultural University of Athens, Iera Odos 75, 118 55 Athens, Greece.
| |
Collapse
|
5
|
Skagia A, Vezyri E, Grados K, Venieraki A, Karpusas M, Katinakis P, Dimou M. Structure-Function Analysis of the Periplasmic Escherichia coli Cyclophilin PpiA in Relation to Biofilm Formation. J Mol Microbiol Biotechnol 2017; 27:228-236. [PMID: 28889121 DOI: 10.1159/000478858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 06/12/2017] [Indexed: 12/30/2022] Open
Abstract
The presence of peptidyl-prolyl cis/trans isomerases (PPIases, EC: 5.2.1.8) in all domains of life indicates their biological importance. Cyclophilin PpiA, present in the periplasm of gram-negative bacteria, possesses PPIase activity but its physiological functions are still not clearly defined. Here, we demonstrate that the ΔppiA deletion strain from Escherichia coli exhibits an increased ability for biofilm formation and enhanced swimming motility compared to the wild-type strain. To identify structural features of PpiA which are necessary for the negative modulation of biofilm formation, we constructed a series of mutant PpiA proteins using a combination of error-prone and site-directed mutagenesis approaches. We show that the negative effect of PpiA on biofilm formation is not dependent on its PPIase activity, since PpiA mutants with a reduced PPIase activity are able to complement the ΔppiA strain during biofilm growth.
Collapse
Affiliation(s)
- Aggeliki Skagia
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Athens, Greece
| | | | | | | | | | | | | |
Collapse
|
6
|
Skagia A, Zografou C, Venieraki A, Fasseas C, Katinakis P, Dimou M. Functional analysis of the cyclophilin PpiB role in bacterial cell division. Genes Cells 2017; 22:810-824. [DOI: 10.1111/gtc.12514] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 06/20/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Aggeliki Skagia
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75 11855 Athens Greece
| | - Chrysoula Zografou
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75 11855 Athens Greece
| | - Anastasia Venieraki
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75 11855 Athens Greece
| | - Costas Fasseas
- Laboratory of Electron Microscopy; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75 11855 Athens Greece
| | - Panagiotis Katinakis
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75 11855 Athens Greece
| | - Maria Dimou
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75 11855 Athens Greece
| |
Collapse
|
7
|
Venieraki A, Dimou M, Katinakis P. Endophytic fungi residing in medicinal plants have the ability to produce the same or similar pharmacologically active secondary metabolites as their hosts. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/hppj-2017-0006] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Summary
Medicinal plants have been used for thousands of years in folk medicines and still are used for their health benefits. In our days medicinal plants are exploited for the isolation of plant-derived drugs as they are very effective and have relatively less or no side effects. However, the natural resources of medicinal plants are gradually exhausted and access to plant bioactive compounds is challenged by the low levels at which these products accumulate in native medicinal plants. For instance, to meet the market demands of 3 Kg per year of vinca alkaloids, powerful plant-derived anticancer drugs, 1.5×106 Kg dry leaves are required. In this regard, this review aims to highlight the fact that endophytic fungi residing in medicinal plants are capable to biosynthesize pharmacologically active secondary metabolites similar or identical to those produced by their host medicinal plant. Furthermore, the evolutionary origin of the genes involved in these metabolic pathways as well as the approaches designed to enhance the production of these metabolites by the isolated endophytic fungi are also discussed.
Collapse
Affiliation(s)
- A. Venieraki
- Laboratory of General and Agricultural Microbiology Department of Crop Science, Agricultural University of Athens, Iera Odos 75, GR 118 55 Votanikos, Athens , Greece
| | - M. Dimou
- Laboratory of General and Agricultural Microbiology Department of Crop Science, Agricultural University of Athens, Iera Odos 75, GR 118 55 Votanikos, Athens , Greece
| | - P. Katinakis
- Laboratory of General and Agricultural Microbiology Department of Crop Science, Agricultural University of Athens, Iera Odos 75, GR 118 55 Votanikos, Athens , Greece
| |
Collapse
|
8
|
Thomloudi EE, Skagia A, Venieraki A, Katinakis P, Dimou M. Functional analysis of the two cyclophilin isoforms of Sinorhizobium meliloti. World J Microbiol Biotechnol 2017; 33:28. [PMID: 28058638 DOI: 10.1007/s11274-016-2201-6] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 12/23/2016] [Indexed: 11/24/2022]
Abstract
The nitrogen fixing Sinorhizobium meliloti possesses two genes, ppiA and ppiB, encoding two cyclophilin isoforms which belong to the superfamily of peptidyl prolyl cis/trans isomerases (PPIase, EC: 5.2.1.8). Here, we functionally characterize the two proteins and we demonstrate that both recombinant cyclophilins are able to isomerise the Suc-AAPF-pNA synthetic peptide but neither of them displays chaperone function in the citrate synthase thermal aggregation assay. Furthermore, we observe that the expression of both enzymes increases the viability of E. coli BL21 in the presence of abiotic stress conditions such as increased heat and salt concentration. Our results support and strengthen previous high-throughput studies implicating S. meliloti cyclophilins in various stress conditions.
Collapse
Affiliation(s)
- Eirini-Evangelia Thomloudi
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Aggeliki Skagia
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Anastasia Venieraki
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Panagiotis Katinakis
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Maria Dimou
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece.
| |
Collapse
|
9
|
Skagia A, Vezyri E, Sigala M, Kokkinou A, Karpusas M, Venieraki A, Katinakis P, Dimou M. Structural and functional analysis of cyclophilin PpiB mutants supports anin vivofunction not limited to prolyl isomerization activity. Genes Cells 2016; 22:32-44. [DOI: 10.1111/gtc.12452] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/26/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Aggeliki Skagia
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| | - Eleni Vezyri
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| | - Markezina Sigala
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| | - Areti Kokkinou
- Laboratory of Physics; Department of Biotechnology; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| | - Michael Karpusas
- Laboratory of Physics; Department of Biotechnology; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| | - Anastasia Venieraki
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| | - Panagiotis Katinakis
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| | - Maria Dimou
- Laboratory of General and Agricultural Microbiology; Faculty of Crop Science; Agricultural University of Athens; Iera Odos 75, Votanikos Athens 11855 Greece
| |
Collapse
|
10
|
Skagia A, Zografou C, Vezyri E, Venieraki A, Katinakis P, Dimou M. Cyclophilin PpiB is involved in motility and biofilm formation via its functional association with certain proteins. Genes Cells 2016; 21:833-51. [PMID: 27306110 DOI: 10.1111/gtc.12383] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 05/09/2016] [Indexed: 12/24/2022]
Abstract
PpiB belongs to the superfamily of peptidyl-prolyl cis/trans isomerases (PPIases, EC: 5.2.1.8), which catalyze the rate-limiting protein folding step at peptidyl-prolyl bonds and control several biological processes. In this study, we show that PpiB acts as a negative effector of motility and biofilm formation ability of Escherichia coli. We identify multicopy suppressors of each ΔppiB phenotype among putative PpiB prey proteins which upon deletion are often characterized by analogous phenotypes. Many putative preys show similar gene expression in wild-type and ΔppiB genetic backgrounds implying possible post-translational modifications by PpiB. We further conducted in vivo and in vitro interaction screens to determine which of them represent true preys. For DnaK, acetyl-CoA carboxylase, biotin carboxylase subunit (AccC) and phosphate acetyltransferase (Pta) we also showed a direct role of PpiB in the functional control of these proteins because it increased the measured enzyme activity of each protein and further interfered with DnaK localization and the correct folding of AccC. Taken together, these results indicate that PpiB is involved in diverse regulatory mechanisms to negatively modulate motility and biofilm formation via its functional association with certain protein substrates.
Collapse
Affiliation(s)
- Aggeliki Skagia
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Chrysoula Zografou
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Eleni Vezyri
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Anastasia Venieraki
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Panagiotis Katinakis
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| | - Maria Dimou
- Laboratory of General and Agricultural Microbiology, Faculty of Crop Science, Agricultural University of Athens, Iera Odos 75, 11855, Athens, Greece
| |
Collapse
|
11
|
Abstract
Summary
Plant-associated environments harbor a huge number of diverse bacteria that compete and/or cooperate for the occupation of the most nutrient-rich ecological niches. Motility, a common trait among bacteria, has long been assumed to provide a survival advantage to skilful bacteria in invading these environments. Bacterial surface motility, such as swarming, a flagella-driven type of surface movement, although mostly observed and studied on agar substrates, is emerging as a major trait involved in many functions of plant-associated bacteria in regard to their ability to colonize and spread on their host. In this review, we address some novel swarming motility strategies, which enable bacteria to colonize, disperse and compete in plant surfaces.
Collapse
Affiliation(s)
- A. Venieraki
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, Votanikos, GR-118 55 Athens, Greece
| | - P.Ch. Tsalgatidou
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, Votanikos, GR-118 55 Athens, Greece
| | - D.G. Georgakopoulos
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, Votanikos, GR-118 55 Athens, Greece
| | - M. Dimou
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, Votanikos, GR-118 55 Athens, Greece
| | - P. Katinakis
- Laboratory of General and Agricultural Microbiology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, Votanikos, GR-118 55 Athens, Greece
| |
Collapse
|
12
|
Dimou M, Zografou C, Venieraki A, Katinakis P. Functional interaction of Azotobacter vinelandii cytoplasmic cyclophilin with the biotin carboxylase subunit of acetyl-CoA carboxylase. Biochem Biophys Res Commun 2012; 424:736-9. [PMID: 22809506 DOI: 10.1016/j.bbrc.2012.07.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Accepted: 07/08/2012] [Indexed: 10/28/2022]
Abstract
Cyclophilins (E.C. 5.1.2.8) are protein chaperones with peptidyl-prolyl cis/trans isomerase activity (PPIase). In the present study, we demonstrate a physical interaction among AvppiB, encoding the cytoplasmic cyclophilin from the soil nitrogen-fixing bacterium Azotobacter vinelandii, and AvaccC, encoding the biotin carboxylase subunit of acetyl-CoA carboxylase, which catalyzes the committed step in long-chain fatty acid synthesis. A decrease in AvppiB PPIase activity, in the presence of AvaccC, further confirms the interaction. However, PPIase activity seems not to be essential for these interactions since a PPIase active site mutant of cyclophilin does not abolish the AvaccC binding. We further show that the presence of cyclophilin largely influences the measured ATP hydrolyzing activity of AvaccA in a way that is negatively regulated by the PPIase activity. Taken together, our data support a novel role for cyclophilin in regulating biotin carboxylase activity.
Collapse
Affiliation(s)
- Maria Dimou
- Laboratory of General and Agricultural Microbiology, Department of Agricultural Biotechnology, Agricultural University of Athens, Iera Odos 75, 11855 Votanikos, Athens, Greece
| | | | | | | |
Collapse
|
13
|
Dimou M, Zografou C, Venieraki A, Katinakis P. Biochemical characterization of two Azotobacter vinelandii FKBPs and analysis of their interaction with the small subunit of carbamoyl phosphate synthetase. Mol Biol Rep 2012; 39:10003-12. [DOI: 10.1007/s11033-012-1869-4] [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] [Received: 03/20/2012] [Accepted: 06/19/2012] [Indexed: 10/28/2022]
|
14
|
Dimou M, Zografou C, Venieraki A, Katinakis P. Transcriptional and biochemical characterization of two Azotobacter vinelandii FKBP family members. J Microbiol 2011; 49:635-40. [DOI: 10.1007/s12275-011-0498-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Accepted: 04/18/2011] [Indexed: 02/02/2023]
|
15
|
Venieraki A, Dimou M, Vezyri E, Kefalogianni I, Argyris N, Liara G, Pergalis P, Chatzipavlidis I, Katinakis P. Characterization of nitrogen-fixing bacteria isolated from field-grown barley, oat, and wheat. J Microbiol 2011; 49:525-34. [PMID: 21887633 DOI: 10.1007/s12275-011-0457-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 02/19/2011] [Indexed: 11/24/2022]
Abstract
Diazotrophic bacteria were isolated from the rhizosphere of field-grown Triticum aestivum, Hordeum vulgare, and Avena sativa grown in various regions of Greece. One isolate, with the highest nitrogen-fixation ability from each of the eleven rhizospheres, was selected for further characterisation. Diazotrophic strains were assessed for plant-growth-promoting traits such as indoleacetic acid production and phosphate solubilisation. The phylogenies of 16S rRNA gene of the selected isolates were compared with those based on dnaK and nifH genes. The constructed trees indicated that the isolates were members of the species Azospirillum brasilense, Azospirillum zeae, and Pseudomonas stutzeri. Furthermore, the ipdC gene was detected in all A. brasilence and one A. zeae isolates. The work presented here provides the first molecular genetic evidence for the presence of culturable nitrogen-fixing P. stutzeri and A. zeae associated with field-grown A. sativa and H. vulgare in Greece.
Collapse
Affiliation(s)
- Anastasia Venieraki
- Laboratory of General and Agricultural Microbiology, Department of Agricultural Biotechnology, Agricultural University of Athens, Iera Odos 75, Votanikos 11855, Athens, Greece
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Dimou M, Venieraki A, Zografou C, Katinakis P. The cytoplasmic cyclophilin from Azotobacter vinelandii interacts with phosphate acetyltransferase isoforms enhancing their in vitro activity. Mol Biol Rep 2011; 39:4135-43. [DOI: 10.1007/s11033-011-1196-1] [Citation(s) in RCA: 4] [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] [Received: 12/06/2010] [Accepted: 07/11/2011] [Indexed: 11/30/2022]
|
17
|
Venieraki A, Dimou M, Pergalis P, Kefalogianni I, Chatzipavlidis I, Katinakis P. The genetic diversity of culturable nitrogen-fixing bacteria in the rhizosphere of wheat. Microb Ecol 2011; 61:277-285. [PMID: 20857096 DOI: 10.1007/s00248-010-9747-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Accepted: 09/04/2010] [Indexed: 05/29/2023]
Abstract
A total of 17 culturable nitrogen-fixing bacterial strains associated with the roots of wheat growing in different regions of Greece were isolated and characterized for plant-growth-promoting traits such as auxin production and phosphate solubilization. The phylogenetic position of the isolates was first assessed by the analysis of the PCR-amplified 16S rRNA gene. The comparative sequence analysis and phylogenetic analysis based on 16S rRNA gene sequences show that the isolates recovered in this study are grouped with Azospirillum brasilense, Azospirillum zeae, and Pseudomonas stutzeri. The diazotrophic nature of all isolates was confirmed by amplification of partial nifH gene sequences. The phylogenetic tree based on nifH gene sequences is consistent with 16S rRNA gene phylogeny. The isolates belonging to Azospirillum species were further characterized by examining the partial dnaK gene phylogenetic tree. Furthermore, it was demonstrated that the ipdC gene was present in all Azospirillum isolates, suggesting that auxin is mainly synthesized via the indole-3-pyruvate pathway. Although members of P. stutzeri and A. zeae are known diazotrophic bacteria, to the best of our knowledge, this is the first report of isolation and characterization of strains belonging to these bacterial genera associated with wheat.
Collapse
Affiliation(s)
- Anastasia Venieraki
- Laboratory of Molecular Biology, Department of Agricultural Biotechnology, Agricultural University of Athens, Iera Odos 75, Votanikos, 11855 Athens, Greece
| | | | | | | | | | | |
Collapse
|
18
|
Dimou M, Venieraki A, Liakopoulos G, Kouri ED, Tampakaki A, Katinakis P. Gene Expression and Biochemical Characterization of Azotobacter vinelandii Cyclophilins and Protein Interaction Studies of the Cytoplasmic Isoform with dnaK and lpxH. J Mol Microbiol Biotechnol 2011; 20:176-90. [DOI: 10.1159/000329486] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
|
19
|
Dimou M, Venieraki A, Liakopoulos G, Katinakis P. Cloning, characterization and transcriptional analysis of two phosphate acetyltransferase isoforms from Azotobacter vinelandii. Mol Biol Rep 2010; 38:3653-63. [DOI: 10.1007/s11033-010-0478-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Accepted: 11/09/2010] [Indexed: 10/18/2022]
|
20
|
Sfetsas CC, Milios L, Skopelitou K, Venieraki A, Todou R, Flemetakis E, Katinakis P, Labrou NE. Characterization of 1,2-dibromoethane-degrading haloalkane dehalogenase from Bradyrhizobium japonicum USDA110. Enzyme Microb Technol 2009. [DOI: 10.1016/j.enzmictec.2009.07.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|