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Meneguzzi RDV, Fernandez M, Cappellari LDR, Giordano W, Banchio E. Isolation and Characterization of Plant Growth-Promoting Bacteria from the Rhizosphere of Medicinal and Aromatic Plant Minthostachys verticillata. PLANTS (BASEL, SWITZERLAND) 2024; 13:2062. [PMID: 39124180 PMCID: PMC11314338 DOI: 10.3390/plants13152062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 08/12/2024]
Abstract
This study aimed to isolate and characterize Pseudomonas native strains from the rhizospheric soil of Minthostachys verticillata plants to evaluate their potential as plant growth-promoting rhizobacteria (PGPR). A total of 22 bacterial isolates were obtained and subjected to various biochemical tests, as well as assessments of plant growth-promoting traits such as phosphate solubilization, hydrogen cyanide production, biocontrol properties through antibiosis, and indole acetic production. Genotypic analysis via 16S rRNA gene sequencing and phylogenetic tree construction identified the strains, with one particular strain named SM 33 showing significant growth-promoting effects on M. verticillata seedlings. This strain, SM 33, showed high similarity to Stutzerimonas stutzeri based on 16S rRNA gene sequencing and notably increased both shoot fresh weight and root dry weight of the plants. These findings underscore the potential application of native Pseudomonas strains in enhancing plant growth and health, offering promising avenues for sustainable agricultural practices.
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Affiliation(s)
| | | | | | | | - Erika Banchio
- INBIAS Instituto de Biotecnología Ambiental y Salud, CONICET-Universidad Nacional de Río Cuarto, Río Cuarto 5800, Argentina; (R.d.V.M.); (M.F.); (L.d.R.C.); (W.G.)
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Jang S, Choi SK, Zhang H, Zhang S, Ryu CM, Kloepper JW. History of a model plant growth-promoting rhizobacterium, Bacillus velezensis GB03: from isolation to commercialization. FRONTIERS IN PLANT SCIENCE 2023; 14:1279896. [PMID: 37885658 PMCID: PMC10598611 DOI: 10.3389/fpls.2023.1279896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 09/26/2023] [Indexed: 10/28/2023]
Abstract
Bacillus velezensis strain GB03 is a Gram-positive rhizosphere bacterium known for its ability to promote plant growth and immunity. This review provides a comprehensive overview of the research on GB03 from its initial discovery in Australian wheat fields in 1971 to its current applications. Recognized as a model plant growth-promoting rhizobacterium (PGPR), GB03 has exhibited outstanding performance in enhancing the growth and protection of many crop plants including cucumber, pepper, wheat, barley, soybean, and cotton. Notably, GB03 has been reported to elicit plant immune response, referred to as induced systemic resistance (ISR), against above-ground pathogens and insect pests. Moreover, a pivotal finding in GB03 was the first-ever identification of its bacterial volatile compounds, which are known to boost plant growth and activate ISR. Research conducted over the past five decades has clearly demonstrated the potential of GB03 as an eco-friendly substitute for conventional pesticides and fertilizers. Validating its safety, the U.S. Environmental Protection Agency endorsed GB03 for commercial use as Kodiak® in 1998. Subsequently, other compounds, such as BioYield™, were released as a biological control agent against soil-borne pathogens and as a biofertilizer, utilizing a durable spore formulation. More recently, GB03 has been utilized as a keystone modulator for engineering the rhizosphere microbiome and for eliciting microbe-induced plant volatiles. These extensive studies on GB03 underscore its significant role in sustainable agriculture, positioning it as a safe and environmentally-friendly solution for crop protection.
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Affiliation(s)
- Seonghan Jang
- Infectious Disease Research Center, Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon, Republic of Korea
| | - Soo-Keun Choi
- Infectious Disease Research Center, Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon, Republic of Korea
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), Yuseong-gu, Daejeon, Republic of Korea
| | - Huiming Zhang
- Shanghai Center for Plant Stress Biology, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Shouan Zhang
- Tropical Research and Education Center, Department of Plant Pathology, University of Florida-IFAS, Homestead, FL, United States
| | - Choong-Min Ryu
- Infectious Disease Research Center, Research Institute of Bioscience and Biotechnology (KRIBB), Yuseong-gu, Daejeon, Republic of Korea
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), Yuseong-gu, Daejeon, Republic of Korea
| | - Joseph W. Kloepper
- Department of Entomology and Plant Pathology, Auburn University, Auburn, AL, United States
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Ghotbi-Ravandi AA, Shariatmadari Z, Riahi H, Hassani SB, Heidari F, Ghorbani Nohooji M. Enhancement of Essential Oil Production and Expression of Some Menthol Biosynthesis-Related Genes in Mentha piperita Using Cyanobacteria. IRANIAN JOURNAL OF BIOTECHNOLOGY 2023; 21:e3550. [PMID: 38269195 PMCID: PMC10804067 DOI: 10.30498/ijb.2023.368377.3550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 08/19/2023] [Indexed: 01/26/2024]
Abstract
Background Mentha piperita L. is one of the most important aromatic crops and is cultivated worldwide for essential oils (EOs). Objectives The aim of the present study was to investigate the potential of two cyanobacteria, Anabaena vaginicola ISB42 and Nostoc spongiaeforme var. tenue ISB65, as biological-elicitors to improve the growth and essential oil production of M. piperita. Materials and Methods In this experiment, inoculation of M. piperita with cyanobacteria was performed by adding 1% cyanobacterial suspension to the soil of treated pots on the first time of planting and every 20 days thereafter. The experiment was performed in a randomized complete block design in an experimental greenhouse condition. After 90 days planting, the vegetative growth factors, the content of photosynthetic pigments, as well as the quantity and quality of EOs of treated and control plants were evaluated. Also, quantitative changes in the expression of some menthol biosynthesis-related genes were investigated. Results Cyanobacterial application led to significant increases in M. piperita growth indices including root and shoot biomass, leaf number, leaf area, node number and ramification, as well as photosynthetic pigments content. The statistical analysis showed a 41-75 % increase in some of these growth indices, especially in Nostoc-treated plants. A. vaginicola and N. spongiaeforme var. tenue inoculation led to a 13% and 25% increase in the EOs content of M. piperita, respectively. The EOs components were also affected by cyanobacterial treatments. According to the statistical analysis, Nostoc-treated plants showed the highest amount of (-)-menthone and (-)-limonene, with a 2.36 and 1.87-fold increase compared to the control. A. vaginicola and N. spongiaeforme var. tenue inoculation also led to 40% and 98% increase in transcript level of (-)-limonene synthase gene, respectively. The expression of the (-)-menthone reductase gene, was also increased by 65% and 55% in response to A. vaginicola and N. spongiaeforme var. tenue application, respectively. Conclusions Our data demonstrated that in addition to growth enhancement, these two heterocystous cyanobacteria improved the quantity and quality of EOs by up-regulating the key genes involved in the menthol biosynthetic pathway. Based on our results, these cyanobacteria can be considered valuable candidates in the formulation of low-cost and environmentally friendly biofertilizers in sustainable peppermint production.
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Affiliation(s)
- Ali Akbar Ghotbi-Ravandi
- Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Zeinab Shariatmadari
- Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Hossein Riahi
- Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Seyedeh Batool Hassani
- Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
| | - Fatemeh Heidari
- Department of Plant Sciences and Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
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Gil SS, Cappellari LDR, Giordano W, Banchio E. Antifungal Activity and Alleviation of Salt Stress by Volatile Organic Compounds of Native Pseudomonas Obtained from Mentha piperita. PLANTS (BASEL, SWITZERLAND) 2023; 12:1488. [PMID: 37050113 PMCID: PMC10097229 DOI: 10.3390/plants12071488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/07/2023] [Accepted: 03/27/2023] [Indexed: 06/19/2023]
Abstract
As salt stress has a negative impact on plant growth and crop yield, it is very important to identify and develop any available biotechnology which can improve the salt tolerance of plants. Inoculation with plant-growth-promoting rhizobacteria (PGPR) is a proven environmentally friendly biotechnological resource for increasing the salt stress tolerance of plants and has a potential in-field application. In addition, bacterial volatile organic compounds (mVOCs) are signal molecules that may have beneficial roles in the soil-plant-microbiome ecosystem. We investigated the effects of mVOCs emitted by Pseudomona putida SJ46 and SJ04 on Mentha piperita grown under different levels of NaCl stress by evaluating their growth-promoting potential and capacity to increase salt tolerance effects. Furthermore, we evaluated under control and salt stress conditions the biocontrol ability of VOCs emitted by both these strains to inhibit the growth of Alternaria alternata and Sclerotium rolfsii. The VOCs emitted by both strains under control conditions did not lead to an significant improvement in peppermint growth. However, under salt stress conditions (75 or 100 mM NaCl), an amelioration of its physiological status was observed, with this effect being greater at 100 mM NaCl. This led to an enhancement of the number of leaves and nodes and, increased the shoot fresh and root dry weight by approximately twice in relation to control stressed plants. Moreover, the VOCs released by the two bacteria grown in control or saline media showed a significant reduction in the mycelial growth of A. alternata. In contrast, S. rolfsii growth was reduced 40% by the mVOCs released only under control conditions, with no effects being observed under salt stress. We also explored the composition of the bacterial volatile profiles by means of a solid-phase microextraction/gas chromatography-mass spectrometry (SPME/GC-MS) analysis. From the headspace of SJ46, three VOCs were identified: n-octanol, decane and tetradecane. The emission of SJ04 had the same chromatographic profile, with the addition of two more compounds: 1-(N-phenyl carbamyl)-2-morpholino cyclohexene and tridecane. Only compounds that were not present in the headspace of the control groups were recorded. The salt stress conditions where the bacteria were grown did not qualitatively modify the mVOC emissions. Taken together, our results suggest that plant-associated rhizobacterial VOCs play a potentially important role in modulating plant salt tolerance and reducing fungal growth. Thus, biological resources represent novel tools for counteracting the deleterious effects of salt stress and have the potential to be exploited in sustainable agriculture. Nevertheless, future studies are necessary to investigate technological improvements for bacterial VOC application under greenhouse and open field conditions.
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Lange BM, Srividya N, Lange I, Parrish AN, Benzenberg LR, Pandelova I, Vining KJ, Wüst M. Biochemical basis for the formation of organ-specific volatile blends in mint. FRONTIERS IN PLANT SCIENCE 2023; 14:1125065. [PMID: 37123862 PMCID: PMC10140540 DOI: 10.3389/fpls.2023.1125065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/20/2023] [Indexed: 05/03/2023]
Abstract
Above-ground material of members of the mint family is commercially distilled to extract essential oils, which are then formulated into a myriad of consumer products. Most of the research aimed at characterizing the processes involved in the formation of terpenoid oil constituents has focused on leaves. We now demonstrate, by investigating three mint species, peppermint (Mentha ˣ piperita L.), spearmint (Mentha spicata L.) and horsemint (Mentha longifolia (L.) Huds.; accessions CMEN 585 and CMEN 584), that other organs - namely stems, rhizomes and roots - also emit volatiles and that the terpenoid volatile composition of these organs can vary substantially from that of leaves, supporting the notion that substantial, currently underappreciated, chemical diversity exists. Differences in volatile quantities released by plants whose roots had been dipped in a Verticillium dahliae-spore suspension (experimental) or dipped in water (controls) were evident: increases of some volatiles in the root headspace of mint species that are susceptible to Verticillium wilt disease (peppermint and M. longifolia CMEN 584) were detected, while the quantities of certain volatiles decreased in rhizomes of species that show resistance to the disease (spearmint and M. longifolia CMEN 585). To address the genetic and biochemical basis underlying chemical diversity, we took advantage of the newly sequenced M. longifolia CMEN 585 genome to identify candidate genes putatively coding for monoterpene synthases (MTSs), the enzymes that catalyze the first committed step in the biosynthesis of monoterpenoid volatiles. The functions of these genes were established by heterologous expression in Escherichia coli, purification of the corresponding recombinant proteins, and enzyme assays, thereby establishing the existence of MTSs with activities to convert a common substrate, geranyl diphosphate, to (+)-α-terpineol, 1,8-cineole, γ-terpinene, and (-)-bornyl diphosphate, but were not active with other potential substrates. In conjunction with previously described MTSs that catalyze the formation of (-)-β-pinene and (-)-limonene, the product profiles of the MTSs identified here can explain the generation of all major monoterpene skeletons represented in the volatiles released by different mint organs.
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Affiliation(s)
- B. Markus Lange
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, WashingtonState University, Pullman, WA, United States
- *Correspondence: B. Markus Lange,
| | - Narayanan Srividya
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, WashingtonState University, Pullman, WA, United States
| | - Iris Lange
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, WashingtonState University, Pullman, WA, United States
| | - Amber N. Parrish
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, WashingtonState University, Pullman, WA, United States
| | - Lukas R. Benzenberg
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, WashingtonState University, Pullman, WA, United States
- Institut für Ernährungs- und Lebensmittelwissenschaften, Rheinische Friedrich Wilhelms-UniversitätBonn, Bonn, Germany
| | - Iovanna Pandelova
- Department of Horticulture, Oregon State University, Corvallis, OR, United States
| | - Kelly J. Vining
- Department of Horticulture, Oregon State University, Corvallis, OR, United States
| | - Matthias Wüst
- Institut für Ernährungs- und Lebensmittelwissenschaften, Rheinische Friedrich Wilhelms-UniversitätBonn, Bonn, Germany
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Fuchs LK, Holland AH, Ludlow RA, Coates RJ, Armstrong H, Pickett JA, Harwood JL, Scofield S. Genetic Manipulation of Biosynthetic Pathways in Mint. FRONTIERS IN PLANT SCIENCE 2022; 13:928178. [PMID: 35774811 PMCID: PMC9237610 DOI: 10.3389/fpls.2022.928178] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
In recent years, the study of aromatic plants has seen an increase, with great interest from industrial, academic, and pharmaceutical industries. Among plants attracting increased attention are the Mentha spp. (mint), members of the Lamiaceae family. Mint essential oils comprise a diverse class of molecules known as terpenoids/isoprenoids, organic chemicals that are among the most diverse class of naturally plant derived compounds. The terpenoid profile of several Mentha spp. is dominated by menthol, a cyclic monoterpene with some remarkable biological properties that make it useful in the pharmaceutical, medical, cosmetic, and cleaning product industries. As the global market for Mentha essential oils increases, the desire to improve oil composition and yield follows. The monoterpenoid biosynthesis pathway is well characterised so metabolic engineering attempts have been made to facilitate this improvement. This review focuses on the Mentha spp. and attempts at altering the carbon flux through the biosynthetic pathways to increase the yield and enhance the composition of the essential oil. This includes manipulation of endogenous and heterologous biosynthetic enzymes through overexpression and RNAi suppression. Genes involved in the MEP pathway, the menthol and carvone biosynthetic pathways and transcription factors known to affect secondary metabolism will be discussed along with non-metabolic engineering approaches including environmental factors and the use of plant growth regulators.
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Affiliation(s)
- Lorenz K. Fuchs
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | | | | | - Ryan J. Coates
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Harvey Armstrong
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - John A. Pickett
- School of Chemistry, Cardiff University, Cardiff, United Kingdom
| | - John L. Harwood
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
| | - Simon Scofield
- School of Biosciences, Cardiff University, Cardiff, United Kingdom
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Palermo TB, Cappellari LDR, Chiappero J, Giordano W, Banchio E. Beneficial rhizobacteria inoculation on Ocimum basilicum reduces the growth performance and nutritional value of Spodoptera frugiperda. PEST MANAGEMENT SCIENCE 2022; 78:778-784. [PMID: 34708509 DOI: 10.1002/ps.6691] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 09/07/2021] [Accepted: 10/28/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Plant growth-promoting rhizobacteria (PGPR) has a significant role in plant-insect interaction. However, the extent of their impact on insects is still not well understood. This investigation was designed to evaluate the role of inoculation with Bacillus amyloliquefaciens GB03 on sweet basil (Ocimum basilucum L.) in the development and nutritional parameters of Spodoptera frugiperda. In addition, the feeding preferences on inoculated and non-inoculated plants were assessed. RESULTS Spodoptera frugiperda larvae reared with inoculated sweet basil leaves had a strong negative effect on the development of the insect, resulting in lower larval and pupal weights, and a longer period for larval-adult development. Moreover, adult emergence was reduced, but the relative consumption rate (RCR) value was unaffected, thereby revealing no alteration of the palatability. Growth rate and nutritional indicators, such as the efficiency of conversion of ingested food (ECI) and the efficiency of conversion of digested food (ECD), were reduced in larvae reared from treated plants. In the choice test, larvae avoided feeding on inoculated leaves. CONCLUSION The higher occurrence of secondary metabolites in inoculated plants could have been the reason for the reduction of the plant nutritional rate and also for the food selection, since it has been previously reported that GB03 inoculated sweet basil increased the essential oil yield. Therefore, PGPR inoculation could be used as a growth promoter, making it a promising candidate for plant protection programs against insects in aromatic plant production. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Tamara Belén Palermo
- INBIAS Instituto de Biotecnología Ambiental y Salud (CONICET - Universidad Nacional de Río Cuarto), Campus Universitario, Río Cuarto, Argentina
| | - Lorena Del Rosario Cappellari
- INBIAS Instituto de Biotecnología Ambiental y Salud (CONICET - Universidad Nacional de Río Cuarto), Campus Universitario, Río Cuarto, Argentina
| | - Julieta Chiappero
- INBIAS Instituto de Biotecnología Ambiental y Salud (CONICET - Universidad Nacional de Río Cuarto), Campus Universitario, Río Cuarto, Argentina
| | - Walter Giordano
- INBIAS Instituto de Biotecnología Ambiental y Salud (CONICET - Universidad Nacional de Río Cuarto), Campus Universitario, Río Cuarto, Argentina
| | - Erika Banchio
- INBIAS Instituto de Biotecnología Ambiental y Salud (CONICET - Universidad Nacional de Río Cuarto), Campus Universitario, Río Cuarto, Argentina
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El-Demerdash MM, El-Sayed AS, Georg NM, Abou-Elnour A, Nosier H. Biosystematic studies of some Egyptian species of Cestrum (Solanaceae). Mol Biol Rep 2021; 48:4497-4515. [PMID: 34101109 DOI: 10.1007/s11033-021-06471-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 06/01/2021] [Indexed: 11/29/2022]
Abstract
Cestrum is the second largest genus of family Solanaceae, after Solanum, distributed in warm to subtropical regions. Species of genus Cestrum are one of the most ethnopharmacological relevant plants, for their broad biological and pharmacological properties. There is a scarcity to taxonomical studies and identification of these plants in Egypt, thus, the objective of this study was to implement various morphological features, chemical markers and molecular tools to emphasize the taxonomical features of the different Cestrum species. Morphologically, the epidermal cells of C. diurnum, C. elegans and C. parqui were irregular with sinuate anticlinal wall patterns for both surfaces, while, C. nocturnum has anticlinal walls, sinuolate with polygonal to irregular epidermal cells on the abaxial surface. The species of Cestrum have hypostomatic leaves, except C. parqui that has amphistomatic leaves. The experimented species of Cestrum have Anomocytic and anisocytic stomata, while, C. elegans has a diacytic stomata. The morphologically identified Cestrum spp were molecular confirmed based on their ITS sequences, the sequences of C. diurnum, C. nocturnum, C. elegans and C. parqui were deposited on genbank with accession # MT742788.1, MT749390.1, MW091481.1 and MW023744.1, respectively. From the SCOT analyses, the four species of Cestrum were grouped into 2 clusters (I, II), cluster I contains C. elegans, C. nocturnum and C. parqui, while cluster II contains only C. diurnum with 100% polymorphism for all primers. From the GC-MS profile, the C. diurnum exhibited a diverse metabolic paradigm, ensuring their richness with different metabolites comparing to other experimented Cestrum species. Among the total resolved metabolites, 15-methyltricyclo 6.5.2-pentadeca-1,3,5,7,9, 11,13-heptene was the highly incident compound in C. elegans (35.89%) followed by C. parqui (21.81%) and C. diurnum (11.28%), while it absent on C. nocturnum. The compound, 2,2',6,6'-tetra-tert-butyl-4,4'-methylenediphenol was highly detected in C. elegans and C. dirunum with minor amounts in the other Cestrum species. Cypermethrin and 3-butynyl-2,2,5-trimethyl-1,3-dioxane-5-methanol were pivotally reported in C. nocturnum. Taken together, from molecular and metabolic markers, C. diurnum, C. parqui and C. elegans have higher proximity unlike to C. nocturnum.
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Affiliation(s)
- Marwa M El-Demerdash
- Enzymology and Fungal Biotechnology Lab, Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
| | - Ashraf S El-Sayed
- Enzymology and Fungal Biotechnology Lab, Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
| | - Nelly M Georg
- Enzymology and Fungal Biotechnology Lab, Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Amira Abou-Elnour
- Enzymology and Fungal Biotechnology Lab, Botany and Microbiology Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
| | - Hala Nosier
- Department of Botany, Faculty of Science, Ain Shams University, Cairo, Egypt
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del Rosario Cappellari L, Chiappero J, Palermo TB, Giordano W, Banchio E. Impact of Soil Rhizobacteria Inoculation and Leaf-Chewing Insect Herbivory on Mentha piperita Leaf Secondary Metabolites. J Chem Ecol 2020; 46:619-630. [DOI: 10.1007/s10886-020-01193-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 06/05/2020] [Accepted: 06/17/2020] [Indexed: 12/11/2022]
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The Effect of Auxin and Auxin-Producing Bacteria on the Growth, Essential Oil Yield, and Composition in Medicinal and Aromatic Plants. Curr Microbiol 2020; 77:564-577. [PMID: 32080752 DOI: 10.1007/s00284-020-01917-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 02/08/2020] [Indexed: 12/28/2022]
Abstract
Aromatic plants had been used since ancient times for their preservative and medicinal properties, and to impart aroma and flavor to food. Also their secondary metabolites are economically important as drugs, flavor and fragrances, pharmaceuticals, agrochemicals, dye, and pigments, pesticides, cosmetics, food additives, other industrially biochemical, and also play a major role in the adaptation of plants to their environment. Indole acetıc acid-producing rhizobacteria inoculations increase in stomatal density and level of secondary metabolite and have a synergistic effect on monoterpene biosynthesis. Bacterial inoculation significantly affected and increased the chemical composition of essential oil, citronellol, and geraniol content in rose-scented geranium; essential oil composition and total phenolic content in marigold; density, number, and size of glandular trichomes in sweet wormwood and peppermint essential oil components such as geranyl acetate, limonene, and β-pinene in coriander; oil yield and content in calendula; yield of the herb in hyssop; oxygenated compounds, essential oil content and yield, anethol and changing the chemical composition in fennel; growth, number of glandular trichomes and essential oil yield, root branching and length, and total amount of essential oil, production of monoterpenes such as pulegone, menthol, menthone, menthofuran, and terpineol content, biosynthesis of secondary metabolites in peppermint; growth and essential oil yield in marjoram; glandular hair abundance, essential oil yield, and monoterpene biosynthesis in basil; phellandrene, limonene, borneol, and campor in rosemary; carvacrol, thymol, linalool, and borneol in oregano; and α-thujene, α-pinene, α-terpinene, p-simen, β-pinene, and γ-terpinene contents and essential oil yield in summer savory. Inoculation with IAA-producing bacteria medicinal roots increased the valerenic acid in valerian, essential oil and quality in vetiver, curcumin content in turmeric alkaloid and ginsenoside content in ginseng, and inulin content in Jerusalem artichoke.
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Cappellari LDR, Santoro MV, Schmidt A, Gershenzon J, Banchio E. Improving Phenolic Total Content and Monoterpene in Mentha x piperita by Using Salicylic Acid or Methyl Jasmonate Combined with Rhizobacteria Inoculation. Int J Mol Sci 2019; 21:E50. [PMID: 31861733 PMCID: PMC6981552 DOI: 10.3390/ijms21010050] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 01/23/2023] Open
Abstract
The effects of plant inoculation with plant growth-promoting rhizobacteria (PGPR) and those resulting from the exogenous application of salicylic acid (SA) or methyl jasmonte (MeJA) on total phenolic content (TPC) and monoterpenes in Mentha x piperita plants were investigated. Although the PGPR inoculation response has been studied for many plant species, the combination of PGPR and exogenous phytohormones has not been investigated in aromatic plant species. The exogenous application of SA produced an increase in TPC that, in general, was of a similar level when applied alone as when combined with PGPR. This increase in TPC was correlated with an increase in the activity of the enzyme phenylalanine ammonia lyase (PAL). Also, the application of MeJA at different concentrations in combination with inoculation with PGPR produced an increase in TPC, which was more relevant at 4 mM, with a synergism effect being observed. With respect to the main monoterpene concentrations present in peppermint essential oil (EO), it was observed that SA or MeJA application produced a significant increase similar to that of the combination with rhizobacteria. However, when plants were exposed to 2 mM MeJA and inoculated, an important increase was produced in the concentration on menthol, pulegone, linalool, limonene, and menthone concentrations. Rhizobacteria inoculation, the treatment with SA and MeJA, and the combination of both were found to affect the amount of the main monoterpenes present in the EO of M. piperita. For this reason, the expressions of genes related to the biosynthesis of monoterpene were evaluated, with this expression being positively affected by MeJA application and PGPR inoculation, but was not modified by SA application. Our results demonstrate that MeJA or SA application combined with inoculation with PGPR constitutes an advantageous management practice for improving the production of secondary metabolites from M. piperita.
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Affiliation(s)
| | - Maricel Valeria Santoro
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, 07745 Jena, Germany; (M.V.S.); (A.S.)
| | - Axel Schmidt
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, 07745 Jena, Germany; (M.V.S.); (A.S.)
| | - Jonathan Gershenzon
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Str. 8, 07745 Jena, Germany; (M.V.S.); (A.S.)
| | - Erika Banchio
- INBIAS (CONICET-Universidad Nacional de Río Cuarto), Campus Universitario, 5800 Río Cuarto, Argentina;
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Cappellari LDR, Santoro MV, Schmidt A, Gershenzon J, Banchio E. Induction of essential oil production in Mentha x piperita by plant growth promoting bacteria was correlated with an increase in jasmonate and salicylate levels and a higher density of glandular trichomes. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 141:142-153. [PMID: 31163341 DOI: 10.1016/j.plaphy.2019.05.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/28/2019] [Accepted: 05/28/2019] [Indexed: 05/14/2023]
Abstract
Plant growth promoting bacteria (PGPB) are agriculturally important soil bacteria that increase plant growth. We subjected peppermint to inoculation with three species of PGPB. After inoculation, the plants were sprayed with methyl jasmonate solution (MeJA) or SA (salicylic acid). Then, the plants were harvested and the plant growth parameters, trichome density, EO content and endogenous phytohormones were measured. Shoot fresh weight was reduced in plants inoculated and treated with MeJA whereas EO content varied depending on the MeJA concentration applied. Plants inoculated and treated with MeJA 2 mM showed the maximum increase in EO production, revealing a synergism between PGPB and MeJA. SA treatments also enhanced EO yield. The increased growth and EO production observed upon PGPB application were at least partly due to an increase in the JA and SA concentrations in the plant, as well as to an associated rise in the glandular trichome density.
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Affiliation(s)
- Lorena Del Rosario Cappellari
- Dpto. Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Campus Universitario, 5800, Río Cuarto, Argentina
| | - Maricel Valeria Santoro
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745, Jena, Germany
| | - Axel Schmidt
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745, Jena, Germany
| | - Jonathan Gershenzon
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745, Jena, Germany
| | - Erika Banchio
- Dpto. Biología Molecular, FCEFQyN, Universidad Nacional de Río Cuarto, Campus Universitario, 5800, Río Cuarto, Argentina.
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Field Based Assessment of Capsicum annuum Performance with Inoculation of Rhizobacterial Consortia. Microorganisms 2019; 7:microorganisms7030089. [PMID: 30901903 PMCID: PMC6463109 DOI: 10.3390/microorganisms7030089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 11/16/2022] Open
Abstract
Plant growth promoting rhizobacteria (PGPR) are associated with plant roots and augment plant productivity and immunity by reducing fertilizer application rates and nutrient runoff. Studies were conducted to evaluate bell pepper transplants amended with formulation of consortium of two indigenous PGPR isolates (Bacillus subtilis and Bacillus pumilus) in terms of increase in yield and disease resistance under field conditions. Transplants were planted into plots treated by NPK (nitrogen, phosphorus and potassium), fungicides, soil solarization, MeBr fumigation, PGPR and untreated soil. Treatments were assessed for incidence of soil-borne phytopathogens viz. Phytophthora capsici and Colletotrichum sp. Highly significant increases in bell pepper transplant growth occurred in response to formulations of PGPR isolates. Transplant vigor and survival in the field were also improved by PGPR treatments. Consortium of Bacillus subtilis and Bacillus pumilus reduced disease incidence of damping off by 1.81% and anthracnose by 1.75%. Numbers of colony forming units of Phytophthora capsici and Colletotrichum sp. were significantly higher in all plots than those treated with PGPR consortium. Incidence of seed rot and seedling blight on bell pepper was significantly lower in PGPR-treated plots and highest in untreated plots. Total fruit yield of bell pepper increased by 379.36% with PGPR consortium (Bacillus subtilis and Bacillus pumilus).
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Ahmad B, Jahan A, Sadiq Y, Shabbir A, Jaleel H, Khan MMA. Radiation-mediated molecular weight reduction and structural modification in carrageenan potentiates improved photosynthesis and secondary metabolism in peppermint (Mentha piperita L.). Int J Biol Macromol 2018; 124:1069-1079. [PMID: 30521890 DOI: 10.1016/j.ijbiomac.2018.12.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 12/01/2018] [Accepted: 12/02/2018] [Indexed: 12/18/2022]
Abstract
In an attempt to gain insights into the possible relationship between the irradiation-mediated molecular weight reduction and structural modification and the growth-promotion activity, characterization of the polysaccharide before and after irradiation was carried out through Fourier Transform Infrared (FT-IR), Ultraviolet-visible (UV-vis) and Nuclear Magnetic Resonance (NMR) spectroscopic studies. Moreover, graded concentrations of irradiated carrageenan (IC) were applied through foliage to assess the performance of peppermint (Mentha piperita L.). Among the various concentrations of IC [0 (control), un-irradiated carrageenan (UC), 40, 80, 120, 160 and 200 mg L-1], the effect of 80 mg L-1 IC established to be most favorable for most of the parameters studied. Rubisco and phenylalanine ammonia lyase activities were maximally enhanced by 65.9% and 35.6% by the application of 80 mg L-1 IC, respectively; as compared to the control and UC. A maximum enrichment in the content (32.8%) and yield (88.3%) of essential oil was noted by the application of 80 mg L-1 IC, respectively. Results of the gas chromatography revealed that the contents of menthol and 1, 8-cineole were increased; however, menthone and menthyl-acetate contents were decreased by the application of IC over the control and UC.
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Affiliation(s)
- Bilal Ahmad
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India.
| | - Ajmat Jahan
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India
| | - Yawar Sadiq
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India
| | - Asfia Shabbir
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India
| | - Hassan Jaleel
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India
| | - M Masroor A Khan
- Department of Botany, Aligarh Muslim University, Aligarh 202002, India
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