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Ansari MM, Bisht N, Singh T, Chauhan PS. Symphony of survival: Insights into cross-talk mechanisms in plants, bacteria, and fungi for strengthening plant immune responses. Microbiol Res 2024; 285:127762. [PMID: 38763015 DOI: 10.1016/j.micres.2024.127762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/05/2024] [Accepted: 05/11/2024] [Indexed: 05/21/2024]
Abstract
Plants coexist with a diverse array of microorganisms, predominantly bacteria and fungi, in both natural and agricultural environments. While some microorganisms positively influence plant development and yield, others can cause harm to the host, leading to significant adverse impacts on the environment and the economy. Plant growth-promoting microorganisms (PGPM), including plant growth-promoting bacteria, arbuscular mycorrhizal fungus (AMF), and rhizobia, have been found to increase plant biomass production by synthesizing hormones, fixing nitrogen, and solubilizing phosphate and potassium. Numerous studies have contributed to unraveling the complex process of plant-microbe interactions in recent decades. In light of the increasing global challenges such as population growth, climate change, and resource scarcity, it has become imperative to explore the potential of plant-bacteria-fungi crosstalk in promoting sustainability. This review aims to bridge existing knowledge gaps, providing a roadmap for future research in this dynamic field by synthesizing current knowledge and identifying emerging trends.
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Affiliation(s)
- Mohd Mogees Ansari
- CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Nikita Bisht
- CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow, India
| | - Tanya Singh
- CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Puneet Singh Chauhan
- CSIR-National Botanical Research Institute (CSIR-NBRI), Rana Pratap Marg, Lucknow, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India.
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2
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Ferreira P, Benabderrahim MA, Hamza H, Marchesini A, Rejili M, Castro J, Tavares RM, Costa D, Sebastiani F, Lino-Neto T. Exploring the Influence of Date Palm Cultivars on Soil Microbiota. MICROBIAL ECOLOGY 2024; 87:103. [PMID: 39088119 PMCID: PMC11294395 DOI: 10.1007/s00248-024-02415-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Accepted: 07/17/2024] [Indexed: 08/02/2024]
Abstract
Plants thrive in diverse environments, where root-microbe interactions play a pivotal role. Date palm (Phoenix dactylifera L.), with its genetic diversity and resilience, is an ideal model for studying microbial adaptation to different genotypes and stresses. This study aimed to analyze the bacterial and fungal communities associated with traditional date palm cultivars and the widely cultivated "Deglet Nour" were explored using metabarcoding approaches. The microbial diversity analysis identified a rich community with 13,189 bacterial and 6442 fungal Amplicon Sequence Variants (ASVs). Actinobacteriota, Proteobacteria, and Bacteroidota dominated bacterial communities, while Ascomycota dominated fungal communities. Analysis of the microbial community revealed the emergence of two distinct clusters correlating with specific date palm cultivars, but fungal communities showed higher sensitivity to date palm genotype variations compared to bacterial communities. The commercial cultivar "Deglet Nour" exhibited a unique microbial composition enriched in pathogenic fungal taxa, which was correlated with its genetic distance. Overall, our study contributes to understanding the complex interactions between date palm genotypes and soil microbiota, highlighting the genotype role in microbial community structure, particularly among fungi. These findings suggest correlations between date palm genotype, stress tolerance, and microbial assembly, with implications for plant health and resilience. Further research is needed to elucidate genotype-specific microbial interactions and their role in enhancing plant resilience to environmental stresses.
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Affiliation(s)
- Pedro Ferreira
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal
| | - Mohamed Ali Benabderrahim
- Faculty of Sciences of Tunis, Department of Biology, University of Tunis EL Manar, 2092, Tunis, Tunisia
- Drylands and Oases Cropping Laboratory. Arid Areas Institute (IRA), 4119, Medenine, Tunisia
| | - Hammadi Hamza
- Drylands and Oases Cropping Laboratory. Arid Areas Institute (IRA), 4119, Medenine, Tunisia
| | - Alexis Marchesini
- Institute for Sustainable Plant Protection, National Research Council, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
- Research Institute On Terrestrial Ecosystems, National Research Council, Porano, Italy
- National Biodiversity Future Center, Palermo, Italy
| | - Mokhtar Rejili
- Department of Life Sciences, Al Imam Mohamed Ibn Saud Islamic University (IMSIU), 11623, Riyadh, Saudi Arabia
| | - Joana Castro
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal
| | - Rui M Tavares
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal
| | - Daniela Costa
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal
| | - Federico Sebastiani
- Institute for Sustainable Plant Protection, National Research Council, Via Madonna del Piano 10, 50019, Sesto Fiorentino, FI, Italy
| | - Teresa Lino-Neto
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus of Gualtar, 4710-057, Braga, Portugal.
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Akgül DS, Önder S, Savaş NG, Yıldız M, Bülbül İ, Özarslandan M. Molecular Identification and Pathogenicity of Fusarium Species Associated with Wood Canker, Root and Basal Rot in Turkish Grapevine Nurseries. J Fungi (Basel) 2024; 10:444. [PMID: 39057329 PMCID: PMC11278196 DOI: 10.3390/jof10070444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/20/2024] [Accepted: 06/21/2024] [Indexed: 07/28/2024] Open
Abstract
Fusarium species are agriculturally important fungi with a broad host range and can be found as endophytic, pathogenic, or opportunistic parasites in many crop plants. This study aimed to identify Fusarium species in bare-rooted, dormant plants in Turkish grapevine nurseries using molecular identification methods and assess their pathogenicity. Asymptomatic dormant plants were sampled from grapevine nurseries (43) in different regions of the country, and fungi were isolated from plant roots and internal basal tissues. The Fusarium strains were identified by performing gene sequencing (TEF1-α, RPB2) and phylogenetic analyses. Pathogenicity tests were carried out by inoculating mycelial agar pieces of strains onto the stem or conidial suspensions into the rhizosphere of vines (1103 Paulsen rootstock). Laboratory tests revealed that Fusarium species were highly prevalent in Turkish grapevine nurseries (41 out of 43). Gene sequencing and phylogenetic analyses unraveled that 12 Fusarium species (F. annulatum, F. brachygibbosum, F. clavum, F. curvatum, F. falciforme, F. fredkrugeri, F. glycines, F. nanum, F. nematophilum, F. nirenbergiae, F. solani, and Fusarium spp.) existed in the ready-to-sale plants. Some of these species (F. annulatum, F. curvatum and F. nirenbergiae) consistently caused wood necrosis of seedling stems, rotting of the basal zone and roots, and reduced root biomass. Although the other nine species also caused some root rot and root reduction, their virulence was not as severe as the pathogenic ones, and they were considered opportunistic parasites or endophytic species. This study suggests that Fusarium species might play an important role in root-basal rot, wood canker symptoms, and young vine decline in Turkish grapevine nurseries and that these species need to be considered for healthy seedling production.
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Affiliation(s)
- Davut Soner Akgül
- Department of Plant Protection, Agriculture Faculty, Çukurova University, 01330 Adana, Türkiye
| | - Serkan Önder
- Department of Plant Protection, Agriculture Faculty, Eskişehir Osmangazi University, 26160 Eskişehir, Türkiye;
| | - Nurdan Güngör Savaş
- Manisa Viticulture Research Institute, Turkish Ministry of Agriculture and Forestry, 45125 Manisa, Türkiye;
| | - Murat Yıldız
- Malatya Apricot Research Institute, Turkish Ministry of Agriculture and Forestry, 44090 Malatya, Türkiye;
| | - İzzet Bülbül
- Biological Control Research Institute, Turkish Ministry of Agriculture and Forestry, 01321 Adana, Türkiye; (İ.B.); (M.Ö.)
| | - Mümine Özarslandan
- Biological Control Research Institute, Turkish Ministry of Agriculture and Forestry, 01321 Adana, Türkiye; (İ.B.); (M.Ö.)
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Elbakary M, Hammad SF, Youseif SH, Soliman HSM. Revealing the diversity of Jojoba-associated fungi using amplicon metagenome approach and assessing the in vitro biocontrol activity of its cultivable community. World J Microbiol Biotechnol 2024; 40:205. [PMID: 38755302 DOI: 10.1007/s11274-024-03986-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 04/13/2024] [Indexed: 05/18/2024]
Abstract
Jojoba shrubs are wild plants cultivated in arid and semiarid lands and characterized by tolerance to drought, salinity, and high temperatures. Fungi associated with such plants may be attributed to the tolerance of host plants against biotic stress in addition to the promotion of plant growth. Previous studies showed the importance of jojoba as jojoba oil in the agricultural field; however, no prior study discussed the role of jojoba-associated fungi (JAF) in reflecting plant health and the possibility of using JAF in biocontrol. Here, the culture-independent and culture-dependent approaches were performed to study the diversity of the jojoba-associated fungi. Then, the cultivable fungi were evaluated for in-vitro antagonistic activity and in vitro plant growth promotion assays. The metagenome analysis revealed the existence of four fungal phyla: Ascomycota, Aphelidiomycota, Basidiomycota, and Mortierellomycota. The phylum Ascomycota was the most common and had the highest relative abundance in soil, root, branch, and fruit samples (59.7%, 50.7%, 49.8%, and 52.4%, respectively). Alternaria was the most abundant genus in aboveground tissues: branch (43.7%) and fruit (32.1%), while the genus Discosia had the highest abundance in the underground samples: soil (24%) and root (30.7%). For the culture-dependent method, a total of 14 fungi were isolated, identified, and screened for their chitinolytic and antagonist activity against three phytopathogenic fungi (Fusarium oxysporum, Alternaria alternata and Rhizoctonia solani) as well as their in vitro plant growth promotion (PGP) activity. Based on ITS sequence analysis, the selected potent isolates were identified as Aspergillus stellatusEJ-JFF3, Aspergillus flavus EJ-JFF4, Stilbocrea sp. EJ-JLF1, Fusarium solani EJ-JRF3, and Amesia atrobrunneaEJ-JSF4. The endophyte strain A. flavus EJ-JFF4 exhibited the highest chitinolytic activity (9 Enzyme Index) and antagonistic potential against Fusarium oxysporum, Alternaria alternata, and Rhizoctonia solani phytopathogens with inhibitory percentages of 72, 70, and 80 respectively. Also, A. flavus EJ-JFF4 had significant multiple PGP properties, including siderophore production (69.3%), phosphate solubilization (95.4 µg ml-1). The greatest production of Indol-3-Acetic Acid was belonged to A. atrobrunnea EJ-JSF4 (114.5 µg ml-1). The analysis of FUNGuild revealed the abundance of symbiotrophs over other trophic modes, and the guild of endophytes was commonly assigned in all samples. For the first time, this study uncovered fungal diversity associated with jojoba plants using a culture-independent approach and in-vitro assessed the roles of cultivable fungal strains in promoting plant growth and biocontrol. The present study indicated the significance of jojoba shrubs as a potential source of diverse fungi with high biocontrol and PGP activities.
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Affiliation(s)
- Mustafa Elbakary
- Biotechnology Program, Basic and Applied Science Institute, Egypt-Japan University of Science and Technology, Alexandria, 21934, Egypt.
- Department of Nucleic Acids and Protein Structure, Agricultural Research Center, Agricultural Genetic Engineering Research Institute, Giza, 12619, Egypt.
| | - Sherif F Hammad
- Pharm D Program, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria, 21934, Egypt
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Helwan University, Ain-Helwan, Cairo, 11795, Egypt
| | - Sameh H Youseif
- School of Biotechnology, Nile University, Giza, 12677, Egypt.
- Department of Microbial Genetic Resources, Agricultural Research Center (ARC), National Gene Bank, Giza, 12619, Egypt.
| | - Hesham S M Soliman
- Pharm D Program, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria, 21934, Egypt
- Pharmacognosy Department, Helwan University, Ain-Helwan, Cairo, 11795, Egypt
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Sidhoum W, Dib S, Alim Y, Anseur S, Benlatreche S, Belaidouni ZM, Chamouma FEZ. Growth-promoting effects of Aspergillus Elegans and the dark septate endophyte (DSE) Periconia macrospinosa on cucumber. Arch Microbiol 2024; 206:226. [PMID: 38642120 DOI: 10.1007/s00203-024-03958-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 04/10/2024] [Indexed: 04/22/2024]
Abstract
Cucurbits are subject to a variety of stresses that limit their sustainable production, despite their important role in ensuring food security and nutrition. Plant stress tolerance can be enhanced through fungal endophytes. In this study, two endophytes isolated from wild plant roots, were tested to determine their effect on the growth promotion of cucumber (Cucumis sativus L.) plants. The phylogenetic analysis revealed that the designated isolates were Aspergillus elegans and Periconia macrospinosa. The results of the Plant Growth Promoting Fungal (PGPF) tests showed that both Aspergillus elegans and Periconia macrospinosa have a zinc solubilizing capacity, especially A. elegans, with a solubilization index higher than 80%. Also, both have a high salt tolerance (10-15% NaCl for P. macrospinosa and A. elegans, respectively), cellulolytic activity, and inhibition indices of 40-64.53%. A. elegans and P. macrospinosa had antagonistic effects against the cucumber phytopathogenic fungi Verticillium dahliae and Fusarium oxysporum, respectively. However, A. elegans and P. macrospinosa didn't exhibit certain potential plant benefits, such as the production of hydrogen cyanide (HCN) and phosphate solubilization. The chlorophyll content and growth parameters of two-month-old cucumber plants inoculated with the fungal species were significantly better than those of the controls (non-inoculated); the shoot dry weights of inoculated plants were increased by 138% and 170% for A. elegans and P. macrospinosa, respectively; and the root colonization by fungal endophytes has also been demonstrated. In addition to the fact that P. macrospinosa has long been known as PGPF, this is the first time that the ability of A. elegans to modulate host plant growth has been demonstrated, with the potential to be used as a biofertilizer in sustainable agriculture.
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Affiliation(s)
- Warda Sidhoum
- Laboratoire de Biologie des Microorganismes et Biotechnologie, Faculté des Sciences de la Nature et de la Vie, University Oran 1, Es Senia, 31100, Algerie.
- Département de Biologie, Université de Mostaganem Abdel Hamid Ibn Badis, Mostaganem, 27000, Algerie.
| | - Soulef Dib
- Laboratoire de Biologie des Microorganismes et Biotechnologie, Faculté des Sciences de la Nature et de la Vie, University Oran 1, Es Senia, 31100, Algerie
| | - Yousra Alim
- Laboratoire de Biologie des Microorganismes et Biotechnologie, Faculté des Sciences de la Nature et de la Vie, University Oran 1, Es Senia, 31100, Algerie
| | - Sarra Anseur
- Laboratoire de Biologie des Microorganismes et Biotechnologie, Faculté des Sciences de la Nature et de la Vie, University Oran 1, Es Senia, 31100, Algerie
| | - Sabrina Benlatreche
- Laboratoire de Biologie des Microorganismes et Biotechnologie, Faculté des Sciences de la Nature et de la Vie, University Oran 1, Es Senia, 31100, Algerie
| | | | - Fatiha El Zahra Chamouma
- Département de Biologie, Université de Mostaganem Abdel Hamid Ibn Badis, Mostaganem, 27000, Algerie
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Gowtham HG, Hema P, Murali M, Shilpa N, Nataraj K, Basavaraj GL, Singh SB, Aiyaz M, Udayashankar AC, Amruthesh KN. Fungal Endophytes as Mitigators against Biotic and Abiotic Stresses in Crop Plants. J Fungi (Basel) 2024; 10:116. [PMID: 38392787 PMCID: PMC10890593 DOI: 10.3390/jof10020116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 01/23/2024] [Accepted: 01/26/2024] [Indexed: 02/24/2024] Open
Abstract
The escalating global food demand driven by a gradually expanding human population necessitates strategies to improve agricultural productivity favorably and mitigate crop yield loss caused by various stressors (biotic and abiotic). Biotic stresses are caused by phytopathogens, pests, and nematodes, along with abiotic stresses like salt, heat, drought, and heavy metals, which pose serious risks to food security and agricultural productivity. Presently, the traditional methods relying on synthetic chemicals have led to ecological damage through unintended impacts on non-target organisms and the emergence of microbes that are resistant to them. Therefore, addressing these challenges is essential for economic, environmental, and public health concerns. The present review supports sustainable alternatives, emphasizing the possible application of fungal endophytes as innovative and eco-friendly tools in plant stress management. Fungal endophytes demonstrate capabilities for managing plants against biotic and abiotic stresses via the direct or indirect enhancement of plants' innate immunity. Moreover, they contribute to elevated photosynthesis rates, stimulate plant growth, facilitate nutrient mineralization, and produce bioactive compounds, hormones, and enzymes, ultimately improving overall productivity and plant stress resistance. In conclusion, harnessing the potentiality of fungal endophytes represents a promising approach toward the sustainability of agricultural practices, offering effective alternative solutions to reduce reliance on chemical treatments and address the challenges posed by biotic and abiotic stresses. This approach ensures long-term food security and promotes environmental health and economic viability in agriculture.
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Affiliation(s)
- H G Gowtham
- Department of Studies and Research in Food Science and Nutrition, KSOU, Mysuru 570006, Karnataka, India
| | - P Hema
- Department of Studies in Botany, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
| | - Mahadevamurthy Murali
- Department of Studies in Botany, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
| | - N Shilpa
- Department of Studies in Microbiology, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
| | - K Nataraj
- Department of Studies in Botany, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
- PG Department of Botany, Maharani's Science College for Women, JLB Road, Mysuru 570005, Karnataka, India
| | - G L Basavaraj
- PG Department of Botany, Maharani's Science College for Women, JLB Road, Mysuru 570005, Karnataka, India
| | - Sudarshana Brijesh Singh
- Department of Studies in Botany, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
| | - Mohammed Aiyaz
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
| | - A C Udayashankar
- Department of Studies in Biotechnology, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
| | - Kestur Nagaraj Amruthesh
- Department of Studies in Botany, University of Mysore, Manasagangotri, Mysuru 570006, Karnataka, India
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Kravchenko I, Rayko M, Sokornova S, Tikhonova E, Konopkin A, Lapidus A. Analysis of rhizosphere fungal community of agricultural crops cultivated in laboratory experiments on Chernevaya taiga soil. World J Microbiol Biotechnol 2023; 40:27. [PMID: 38057541 DOI: 10.1007/s11274-023-03827-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 11/02/2023] [Indexed: 12/08/2023]
Abstract
Chernevaya taiga of Western Siberia, Russia, is a unique ecosystem characterized by fertile soil, exceptionally large herbaceous plant sizes, and extraordinarily rapid rates of plant residue degradation. We expected that growing crops on soil collected from Chernevaya taiga, which has never been used for agricultural purposes before, would result in a distinct rhizospheric fungal community. This community could potentially yield novel, potent biostimulators and biocontrol fungi for modern agriculture. To check this idea, we used high-throughput ITS sequencing to examine the microbial communities in the rhizosphere of spring wheat and radish grown in greenhouse experiments on Chernevaya and control soils. Additionally, representative fungal strains were isolated and assessed for their ability to promote growth in wheat seedlings. The study revealed that the most abundant phyla in the rhizospheric fungal community were Mortierellomycota, primarily consisting of Mortierella species, and Ascomycota. Mucor and Umbelopsis comprised the majority of Mucoromycota in the control soils. Fusarium and Oidiodendron, two potentially plant-pathogenic fungi, were only found in the rhizosphere of crops grown in the control soil. Conversely, Chernevaya soil contained a diverse range of potential biocontrol fungi for plants. Tested novel fungal isolates showed a stimulating effect on the development of wheat seedlings and positively affected their rate of biomass accumulation. The results of the study demonstrate that the soil of Chernevaya taiga do indeed contain fungi with prominent potential to stimulate agricultural plants growth.
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Affiliation(s)
- Irina Kravchenko
- Research Center of Biotechnology, Winogradsky Institute of Microbiology, Russian Academy of Sciences, 119071, Moscow, Russia.
| | - Mikhail Rayko
- Center for Bioinformatics and Algorithmic Biotechnology, St. Petersburg State University, 199034, Saint Petersburg, Russia
| | - Sophie Sokornova
- Department of Phytotoxicology and Biotechnology, All-Russian Institute of Plant Protection, 196608, Saint Petersburg, Russia
| | - Ekaterina Tikhonova
- Research Center of Biotechnology, Winogradsky Institute of Microbiology, Russian Academy of Sciences, 119071, Moscow, Russia
| | - Aleksey Konopkin
- Research Center of Biotechnology, Winogradsky Institute of Microbiology, Russian Academy of Sciences, 119071, Moscow, Russia
| | - Alla Lapidus
- Center for Bioinformatics and Algorithmic Biotechnology, St. Petersburg State University, 199034, Saint Petersburg, Russia
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Dubey S, Bhattacharjee A, Pradhan S, Kumar A, Sharma S. Composition of fungal communities upon multiple passaging of rhizosphere microbiome for salinity stress mitigation in Vigna radiata. FEMS Microbiol Ecol 2023; 99:fiad132. [PMID: 37838474 DOI: 10.1093/femsec/fiad132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/27/2023] [Accepted: 10/13/2023] [Indexed: 10/16/2023] Open
Abstract
The top-down approach of microbiome-mediated rhizosphere engineering has emerged as an eco-friendly approach for mitigating stress and enhancing crop productivity. It has been established to mitigate salinity stress in Vigna radiata using multi-passaging approach. During the process of acclimatization under increasing levels of salinity stress, the structure of rhizospheric microbial community undergoes dynamic changes, while facilitating stress mitigation in plants. In this study, using ITS-based amplicon sequencing, the dynamics of rhizosphere fungal community was unravelled over successive passages under salinity stress in V. radiata. Clear shifts were evident among the fungal community members under stress and non-stress conditions, upon application of acclimatized rhizosphere microbiome in V. radiata across successive passages. These shifts correlated with enhanced plant biometrics and reduced stress marker levels in plant. Significant changes in the fungal community structure were witnessed in the rhizosphere across specific passaging cycles under salinity stress, which possibly facilitated stress mitigation in V. radiata.
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Affiliation(s)
- Shubham Dubey
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Annapurna Bhattacharjee
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Salila Pradhan
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Abhay Kumar
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Shilpi Sharma
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, New Delhi 110016, India
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Tang J, Li Y, Zhang L, Mu J, Jiang Y, Fu H, Zhang Y, Cui H, Yu X, Ye Z. Biosynthetic Pathways and Functions of Indole-3-Acetic Acid in Microorganisms. Microorganisms 2023; 11:2077. [PMID: 37630637 PMCID: PMC10459833 DOI: 10.3390/microorganisms11082077] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Indole-3-acetic acid (IAA) belongs to the family of auxin indole derivatives. IAA regulates almost all aspects of plant growth and development, and is one of the most important plant hormones. In microorganisms too, IAA plays an important role in growth, development, and even plant interaction. Therefore, mechanism studies on the biosynthesis and functions of IAA in microorganisms can promote the production and utilization of IAA in agriculture. This mini-review mainly summarizes the biosynthesis pathways that have been reported in microorganisms, including the indole-3-acetamide pathway, indole-3-pyruvate pathway, tryptamine pathway, indole-3-acetonitrile pathway, tryptophan side chain oxidase pathway, and non-tryptophan dependent pathway. Some pathways interact with each other through common key genes to constitute a network of IAA biosynthesis. In addition, functional studies of IAA in microorganisms, divided into three categories, have also been summarized: the effects on microorganisms, the virulence on plants, and the beneficial impacts on plants.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Zihong Ye
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, College of Life Sciences, China Jiliang University, Hangzhou 310018, China; (J.T.); (L.Z.)
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10
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Weirich CE, Marques MR, de Castro AP, Assumpção Benitez B, Roque FDO, Marchetti CR, Rodrigues AD, de Lima DP, Dos Santos EDA. Impact of Iron Mining Activity on the Endophytic Fungal Community of Aspilia grazielae. J Fungi (Basel) 2023; 9:632. [PMID: 37367568 DOI: 10.3390/jof9060632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 03/15/2023] [Accepted: 03/23/2023] [Indexed: 06/28/2023] Open
Abstract
Aspilia grazielae (J. U. Santos) is an endemic plant species in Morro do Urucum in the Pantanal wetland (Brazil). A. grazielae is used for the restoration of areas impacted by iron mining activities. This study evaluates the diversity (composition, value and abundance) of endophytic fungal communities, considering parts of the plant and soil condition. The leaves and roots of A. grazielae were collected from native vegetation areas (NVA) and recovery areas (RCA) in Morro do Urucum. Illumina sequencing technology was used to investigate variation in endophytic fungal biodiversity. The operational taxonomic units detected in NVA ranged from 183 to 263 (leaf) and 115 to 285 (root), while RCA samples ranged from 200 to 282 (leaf) and 156 to 348 (root). Ascomycota phylum was the most common species among all plant samples. The most significant classes identified were Lecanoromycetes and Dothideomycetes that differed significantly (p ≤ 0.05) according to their plant hosts and soil stress. The relative abundance of Pestalotiopsis (Sordariomycetes class) and Stereocaulon (Lecanoromycetes class) genera was influenced by the iron mining activities according to the leaf samples analysed. However, the abundance and wealth of endophytic fungal communities in A. grazielae from RCA were evidence that could explain their high resilience to environmental disturbances and the source-sink dynamics of fungal propagules.
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Affiliation(s)
- Carlos Eduardo Weirich
- Laboratório de Bioquímica Geral e de Microrganismos, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, Campo Grande 79070-900, MS, Brazil
| | - Maria Rita Marques
- Laboratório de Bioquímica Geral e de Microrganismos, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, Campo Grande 79070-900, MS, Brazil
| | - Alinne Pereira de Castro
- Departamento de Biotecnologia, Universidade Católica Dom Bosco, Campo Grande 79117-900, MS, Brazil
| | | | - Fabio de Oliveira Roque
- Programa de Pós-Graduação em Ecologia e Conservação, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
- Centre for Tropical Environmental and Sustainability Science (TESS), James Cook University, Cairns, QLD 4878, Australia
| | - Clarice Rossato Marchetti
- Laboratório de Bioquímica Geral e de Microrganismos, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, Campo Grande 79070-900, MS, Brazil
| | - Amanda Dal'Ongaro Rodrigues
- Laboratório de Bioquímica Geral e de Microrganismos, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, Campo Grande 79070-900, MS, Brazil
| | - Dênis Pires de Lima
- Laboratório de Pesquisa 4, Instituto de Química, Universidade Federal de Mato Grosso do Sul, Campo Grande 79070-900, MS, Brazil
| | - Edson Dos Anjos Dos Santos
- Laboratório de Bioquímica Geral e de Microrganismos, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, Cidade Universitária, Campo Grande 79070-900, MS, Brazil
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11
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Feng Q, Cao S, Liao S, Wassie M, Sun X, Chen L, Xie Y. Fusarium equiseti-inoculation altered rhizosphere soil microbial community, potentially driving perennial ryegrass growth and salt tolerance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 871:162153. [PMID: 36764552 DOI: 10.1016/j.scitotenv.2023.162153] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Fusarium equiseti is an effective plant growth-promoting fungi that induce systemic disease resistance in plants. However, the role of F. equiseti in regulating salt stress response and the underlying mechanisms remain largely unknown. Here, we investigated the effect of F. equiseti Z7 strain on the growth and salt stress response in perennial ryegrass. Additionally, the role of Z7 in regulating the abundance, composition, and structure of native microbial communities in the rhizosphere soil was determined. We observed that Z7 could produce indole-3-acetic acid (IAA) and siderophores. Hence, Z7 inoculation further enhanced plant growth and salt tolerance in perennial ryegrass. Inoculating Z7 increased K+ and decreased Na+ in plant tissues. Z7 inoculation also enhanced soil quality by reducing soluble salt and increasing available phosphorus. Moreover, inoculating Z7 altered the compositions of bacterial and fungal communities in the rhizosphere soil. For instance, beneficial bacterial genera, such as Flavobacterium, Enterobacter, Agrobacterium, and Burkholderiales were dominantly enriched in Z7-inoculated soil. Interestingly, the relative abundance of these genera showed significantly positive correlations with the fresh weight of perennial ryegrass. Our results demonstrate that Z7 could remarkably promote plant growth and salt tolerance by regulating ion homeostasis in plant tissues and microbial communities in the rhizosphere soil. This study provides a scientific foundation for applying microbes to improve plant growth under extreme salt stress conditions.
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Affiliation(s)
- Qijia Feng
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430074, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China; School of Life Science, University of Chinese Academy of Sciences, Beijing, China.
| | - Shilong Cao
- Department of Pratacultural Sciences, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Shujie Liao
- Department of Pratacultural Sciences, College of Agronomy, Hunan Agricultural University, Changsha 410128, China
| | - Misganaw Wassie
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430074, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China; School of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Xiaoyan Sun
- Jiangxi Engineering and Technology Research Center for Ecological Remediation of Heavy Metal Pollution, Institute of Microbe, Jiangxi Academy of Sciences, Nanchang 330096, China
| | - Liang Chen
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430074, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China.
| | - Yan Xie
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Innovative Academy of Seed Design, Chinese Academy of Sciences, Wuhan 430074, China; Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China.
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12
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Gu K, Chen CY, Selvaraj P, Pavagadhi S, Yeap YT, Swarup S, Zheng W, Naqvi NI. Penicillium citrinum Provides Transkingdom Growth Benefits in Choy Sum (Brassica rapa var. parachinensis). J Fungi (Basel) 2023; 9:jof9040420. [PMID: 37108875 PMCID: PMC10143594 DOI: 10.3390/jof9040420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/22/2023] [Accepted: 03/28/2023] [Indexed: 04/05/2023] Open
Abstract
Soil-borne beneficial microbes establish symbioses with plant hosts and play key roles during growth and development therein. In this study, two fungal strains, FLP7 and B9, were isolated from the rhizosphere microbiome associated with Choy Sum (Brassica rapa var. parachinensis) and barley (Hordeum vulgare), respectively. Sequence analyses of the internal transcribed spacer and 18S ribosomal RNA genes combined with colony and conidial morphology identified FLP7 and B9 to be Penicillium citrinum strains/isolates. Plant–fungus interaction assays revealed that isolate B9 showed significant growth promotion effects in Choy Sum plants cultivated in normal soil, as well as under phosphate-limiting conditions. In comparison to the mock control, B9-inoculated plants showed a 34% increase in growth in aerial parts and an 85% upsurge in the fresh weight of roots when cultivated in sterilized soil. The dry biomass of such fungus-inoculated Choy Sum increased by 39% and 74% for the shoots and roots, respectively. Root colonization assays showed that P. citrinum associates directly with the root surface but does not enter or invade the root cortex of the inoculated Choy Sum plants. Preliminary results also indicated that P. citrinum can promote growth in Choy Sum via volatile metabolites too. Interestingly, we detected relatively higher amounts of gibberellins and cytokinins in axenic P. citrinum culture filtrates through liquid chromatography–mass spectrometry analyses. This could plausibly explain the overall growth induction in P. citrinum-inoculated Choy Sum plants. Furthermore, the phenotypic growth defects associated with the Arabidopsis ga1 mutant could be chemically complemented by the exogenous application of P. citrinum culture filtrate, which also showed accumulation of fungus-derived active gibberellins. Our study underscores the importance of transkingdom beneficial effects of such mycobiome-assisted nutrient assimilation and beneficial fungus-derived phytohormone-like metabolites in the induction of robust growth in urban farmed crops.
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Affiliation(s)
- Keyu Gu
- School of Applied Science, Republic Polytechnic, Singapore 738964, Singapore
| | - Cheng-Yen Chen
- Temasek Life Sciences Laboratory, Singapore 117604, Singapore
| | | | - Shruti Pavagadhi
- Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
- NUS Environmental Research Institute, National University of Singapore, Singapore 117411, Singapore
- Singapore Centre for Environmental Life Sciences Engineering, Singapore 637551, Singapore
| | - Yoon Ting Yeap
- Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
- NUS Environmental Research Institute, National University of Singapore, Singapore 117411, Singapore
| | - Sanjay Swarup
- Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
- NUS Environmental Research Institute, National University of Singapore, Singapore 117411, Singapore
- Singapore Centre for Environmental Life Sciences Engineering, Singapore 637551, Singapore
| | - Wenhui Zheng
- College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Naweed I. Naqvi
- Temasek Life Sciences Laboratory, Singapore 117604, Singapore
- Department of Biological Sciences, National University of Singapore, Singapore 117558, Singapore
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13
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Adedayo AA, Babalola OO. Fungi That Promote Plant Growth in the Rhizosphere Boost Crop Growth. J Fungi (Basel) 2023; 9:239. [PMID: 36836352 PMCID: PMC9966197 DOI: 10.3390/jof9020239] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 02/15/2023] Open
Abstract
The fungi species dwelling in the rhizosphere of crop plants, revealing functions that endeavor sustainability of the plants, are commonly referred to as 'plant-growth-promoting fungi' (PGPF). They are biotic inducers that provide benefits and carry out important functions in agricultural sustainability. The problem encountered in the agricultural system nowadays is how to meet population demand based on crop yield and protection without putting the environment and human and animal health at risk based on crop production. PGPF including Trichoderma spp., Gliocladium virens, Penicillium digitatum, Aspergillus flavus, Actinomucor elegans, Podospora bulbillosa, Arbuscular mycorrhizal fungi, etc., have proven their ecofriendly nature to ameliorate the production of crops by improving the growth of the shoots and roots of crop plants, the germination of seeds, the production of chlorophyll for photosynthesis, and the abundant production of crops. PGPF's potential mode of action is as follows: the mineralization of the major and minor elements required to support plants' growth and productivity. In addition, PGPF produce phytohormones, induced resistance, and defense-related enzymes to inhibit or eradicate the invasion of pathogenic microbes, in other words, to help the plants while encountering stress. This review portrays the potential of PGPF as an effective bioagent to facilitate and promote crop production, plant growth, resistance to disease invasion, and various abiotic stresses.
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Affiliation(s)
| | - Olubukola Oluranti Babalola
- Food Security and Safety Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Private Bag X2046, Mmabatho 2735, South Africa
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14
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Li L, Peng S, Wang Z, Zhang T, Li H, Xiao Y, Li J, Liu Y, Yin H. Genome mining reveals abiotic stress resistance genes in plant genomes acquired from microbes via HGT. FRONTIERS IN PLANT SCIENCE 2022; 13:1025122. [PMID: 36407614 PMCID: PMC9667741 DOI: 10.3389/fpls.2022.1025122] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
Colonization by beneficial microbes can enhance plant tolerance to abiotic stresses. However, there are still many unknown fields regarding the beneficial plant-microbe interactions. In this study, we have assessed the amount or impact of horizontal gene transfer (HGT)-derived genes in plants that have potentials to confer abiotic stress resistance. We have identified a total of 235 gene entries in fourteen high-quality plant genomes belonging to phyla Chlorophyta and Streptophyta that confer resistance against a wide range of abiotic pressures acquired from microbes through independent HGTs. These genes encode proteins contributed to toxic metal resistance (e.g., ChrA, CopA, CorA), osmotic and drought stress resistance (e.g., Na+/proline symporter, potassium/proton antiporter), acid resistance (e.g., PcxA, ArcA, YhdG), heat and cold stress resistance (e.g., DnaJ, Hsp20, CspA), oxidative stress resistance (e.g., GST, PoxA, glutaredoxin), DNA damage resistance (e.g., Rad25, Rad51, UvrD), and organic pollutant resistance (e.g., CytP450, laccase, CbbY). Phylogenetic analyses have supported the HGT inferences as the plant lineages are all clustering closely with distant microbial lineages. Deep-learning-based protein structure prediction and analyses, in combination with expression assessment based on codon adaption index (CAI) further corroborated the functionality and expressivity of the HGT genes in plant genomes. A case-study applying fold comparison and molecular dynamics (MD) of the HGT-driven CytP450 gave a more detailed illustration on the resemblance and evolutionary linkage between the plant recipient and microbial donor sequences. Together, the microbe-originated HGT genes identified in plant genomes and their participation in abiotic pressures resistance indicate a more profound impact of HGT on the adaptive evolution of plants.
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Affiliation(s)
- Liangzhi Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
| | | | - Zhenhua Wang
- Zhangjiajie Tobacco Company of Hunan Province, Zhangjiajie, China
| | - Teng Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
- Hunan Urban and Rural Environmental Construction Co., Ltd, Changsha, China
| | - Hongguang Li
- Hunan Tobacco Science Institute, Changsha, China
| | - Yansong Xiao
- Chenzhou Tobacco Company of Hunan Province, Chenzhou, China
| | - Jingjun Li
- Chenzhou Tobacco Company of Hunan Province, Chenzhou, China
| | - Yongjun Liu
- Hunan Tobacco Science Institute, Changsha, China
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, China
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha, China
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15
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Kiruba N JM, Saeid A. An Insight into Microbial Inoculants for Bioconversion of Waste Biomass into Sustainable "Bio-Organic" Fertilizers: A Bibliometric Analysis and Systematic Literature Review. Int J Mol Sci 2022; 23:13049. [PMID: 36361844 PMCID: PMC9656562 DOI: 10.3390/ijms232113049] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 12/31/2023] Open
Abstract
The plant-microbe holobiont has garnered considerable attention in recent years, highlighting its importance as an ecological unit. Similarly, manipulation of the microbial entities involved in the rhizospheric microbiome for sustainable agriculture has also been in the limelight, generating several commercial bioformulations to enhance crop yield and pest resistance. These bioformulations were termed biofertilizers, with the consistent existence and evolution of different types. However, an emerging area of interest has recently focused on the application of these microorganisms for waste valorization and the production of "bio-organic" fertilizers as a result. In this study, we performed a bibliometric analysis and systematic review of the literature retrieved from Scopus and Web of Science to determine the type of microbial inoculants used for the bioconversion of waste into "bio-organic" fertilizers. The Bacillus, Acidothiobacillus species, cyanobacterial biomass species, Aspergillus sp. and Trichoderma sp. were identified to be consistently used for the recovery of nutrients and bioconversion of wastes used for the promotion of plant growth. Cyanobacterial strains were used predominantly for wastewater treatment, while Bacillus, Acidothiobacillus, and Aspergillus were used on a wide variety of wastes such as sawdust, agricultural waste, poultry bone meal, crustacean shell waste, food waste, and wastewater treatment plant (WWTP) sewage sludge ash. Several bioconversion strategies were observed such as submerged fermentation, solid-state fermentation, aerobic composting, granulation with microbiological activation, and biodegradation. Diverse groups of microorganisms (bacteria and fungi) with different enzymatic functionalities such as chitinolysis, lignocellulolytic, and proteolysis, in addition to their plant growth promoting properties being explored as a consortium for application as an inoculum waste bioconversion to fertilizers. Combining the efficiency of such functional and compatible microbial species for efficient bioconversion as well as higher plant growth and crop yield is an enticing opportunity for "bio-organic" fertilizer research.
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Affiliation(s)
- Jennifer Michellin Kiruba N
- Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wroclaw University Science and Technology, 50-373 Wroclaw, Poland
| | - Agnieszka Saeid
- Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wroclaw University Science and Technology, 50-373 Wroclaw, Poland
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16
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Bano A, Waqar A, Khan A, Tariq H. Phytostimulants in sustainable agriculture. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.801788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The consistent use of synthetic fertilizers and chemicals in traditional agriculture has not only compromised the fragile agroecosystems but has also adversely affected human, aquatic, and terrestrial life. The use of phytostimulants is an alternative eco-friendly approach that eliminates ecosystem disruption while maintaining agricultural productivity. Phytostimulants include living entities and materials, such as microorganisms and nanomaterials, which when applied to plants or to the rhizosphere, stimulate plant growth and induce tolerance to plants against biotic and abiotic stresses. In this review, we focus on plant growth-promoting rhizobacteria (PGPR), beneficial fungi, such as arbuscular mycorrhizal fungi (AMF) and plant growth-promoting fungi (PGPF), actinomycetes, cyanobacteria, azolla, and lichens, and their potential benefits in the crop improvement, and mitigation of abiotic and biotic stresses either alone or in combination. PGPR, AMF, and PGPF are plant beneficial microbes that can release phytohormones, such as indole acetic acid (IAA), gibberellic acid (GA), and cytokinins, promoting plant growth and improving soil health, and in addition, they also produce many secondary metabolites, antibiotics, and antioxidant compounds and help to combat biotic and abiotic stresses. Their ability to act as phytostimulator and a supplement of inorganic fertilizers is considered promising in practicing sustainable agriculture and organic farming. Glomalin is a proteinaceous product, produced by AMF, involved in soil aggregation and elevation of soil water holding capacity under stressed and unstressed conditions. The negative effects of continuous cropping can be mitigated by AMF biofertilization. The synergistic effects of PGPR and PGPF may be more effective. The mechanisms of control exercised by PGPF either direct or indirect to suppress plant diseases viz. by competing for space and nutrients, mycoparasitism, antibiosis, mycovirus-mediated cross-protection, and induced systemic resistance (ISR) have been discussed. The emerging role of cyanobacterial metabolites and the implication of nanofertilizers have been highlighted in sustainable agriculture.
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17
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Plant-Microbe Interaction in Sustainable Agriculture: The Factors That May Influence the Efficacy of PGPM Application. SUSTAINABILITY 2022. [DOI: 10.3390/su14042253] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The indiscriminate use of chemical fertilizers and pesticides has caused considerable environmental damage over the years. However, the growing demand for food in the coming years and decades requires the use of increasingly productive and efficient agriculture. Several studies carried out in recent years have shown how the application of plant growth-promoting microbes (PGPMs) can be a valid substitute for chemical industry products and represent a valid eco-friendly alternative. However, because of the complexity of interactions created with the numerous biotic and abiotic factors (i.e., environment, soil, interactions between microorganisms, etc.), the different formulates often show variable effects. In this review, we analyze the main factors that influence the effectiveness of PGPM applications and some of the applications that make them a useful tool for agroecological transition.
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18
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Choi HW, Ahsan SM. Biocontrol Activity of Aspergillus terreus ANU-301 against Two Distinct Plant Diseases, Tomato Fusarium Wilt and Potato Soft Rot. THE PLANT PATHOLOGY JOURNAL 2022; 38:33-45. [PMID: 35144360 PMCID: PMC8831357 DOI: 10.5423/ppj.oa.12.2021.0187] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/10/2022] [Accepted: 01/11/2022] [Indexed: 06/08/2023]
Abstract
To screen antagonistic fungi against plant pathogens, dual culture assay (DCA) and culture filtrate assay (CFA) were performed with unknown soil-born fungi. Among the different fungi isolated and screened from the soil, fungal isolate ANU-301 successfully inhibited growth of different plant pathogenic fungi, Colletotrichum acutatum, Alternaria alternata, and Fusarium oxysporum, in DCA and CFA. Morphological characteristics and rDNA internal transcribed spacer sequence analysis identified ANU-301 as Aspergillus terreus. Inoculation of tomato plants with Fusarium oxysporum f. sp. lycopersici (FOL) induced severe wilting symptom; however, co-inoculation with ANU-301 significantly enhanced resistance of tomato plants against FOL. In addition, culture filtrate (CF) of ANU-301 not only showed bacterial growth inhibition activity against Dickeya chrysanthemi (Dc), but also demonstrated protective effect in potato tuber against soft rot disease. Gas chromatography-tandem mass spectrometry analysis of CF of ANU-301 identified 2,4-bis(1-methyl-1-phenylethyl)-phenol (MPP) as the most abundant compound. MPP inhibited growth of Dc, but not of FOL, in a dose-dependent manner, and protected potato tuber from the soft rot disease induced by Dc. In conclusion, Aspergillus terreus ANU-301 could be used and further tested as a potential biological control agent.
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Affiliation(s)
- Hyong Woo Choi
- Department of Plant Medicals, College of Life Sciences and Biotechnology, Andong National University, Andong 36729,
Korea
| | - S. M. Ahsan
- Department of Plant Medicals, College of Life Sciences and Biotechnology, Andong National University, Andong 36729,
Korea
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19
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Lahlali R, Ibrahim DS, Belabess Z, Kadir Roni MZ, Radouane N, Vicente CS, Menéndez E, Mokrini F, Barka EA, Galvão de Melo e Mota M, Peng G. High-throughput molecular technologies for unraveling the mystery of soil microbial community: challenges and future prospects. Heliyon 2021; 7:e08142. [PMID: 34693062 PMCID: PMC8515249 DOI: 10.1016/j.heliyon.2021.e08142] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 08/08/2021] [Accepted: 10/04/2021] [Indexed: 12/12/2022] Open
Abstract
Soil microbial communities play a crucial role in soil fertility, sustainability, and plant health. However, intensive agriculture with increasing chemical inputs and changing environments have influenced native soil microbial communities. Approaches have been developed to study the structure, diversity, and activity of soil microbes to better understand the biology and plant-microbe interactions in soils. Unfortunately, a good understanding of soil microbial community remains a challenge due to the complexity of community composition, interactions of the soil environment, and limitations of technologies, especially related to the functionality of some taxa rarely detected using conventional techniques. Culture-based methods have been shown unable and sometimes are biased for assessing soil microbial communities. To gain further knowledge, culture-independent methods relying on direct analysis of nucleic acids, proteins, and lipids are worth exploring. In recent years, metagenomics, metaproteomics, metatranscriptomics, and proteogenomics have been increasingly used in studying microbial ecology. In this review, we examined the importance of microbial community to soil quality, the mystery of rhizosphere and plant-microbe interactions, and the biodiversity and multi-trophic interactions that influence the soil structure and functionality. The impact of the cropping system and climate change on the soil microbial community was also explored. Importantly, progresses in molecular biology, especially in the development of high-throughput biotechnological tools, were extensively assessed for potential uses to decipher the diversity and dynamics of soil microbial communities, with the highlighted advantages/limitations.
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Affiliation(s)
- Rachid Lahlali
- Plant Pathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknes, BP S/40, 50001, Meknes, Morocco
| | - Dina S.S. Ibrahim
- Department of Nematodes Diseases and Central Lab of Biotechnology, Plant Pathology Research Institute, Agricultural Research Center (ARC), 12619, Egypt
| | - Zineb Belabess
- Plant Protection Laboratory. Regional Center of Agricultural Research of Oujda, National Institute of Agricultural Research, Avenue Mohamed VI, BP428 60000 Oujda, Morocco
| | - Md Zohurul Kadir Roni
- Tropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences (JIRCAS), 1091-1 Maezato-Kawarabaru, Ishigaki, Okinawa, 907-0002, Japan
| | - Nabil Radouane
- Plant Pathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknes, BP S/40, 50001, Meknes, Morocco
- Department of Biology, Laboratory of Functional Ecology and Environmental Engineering, FST-Fez, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Cláudia S.L. Vicente
- MED – Mediterranean Institute for Agriculture, Environment and Development, Institute for Advanced Studies and Research (IIFA), Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
- INIAV, I.P. - Instituto Nacional de Investigação Agrária e Veterinária, Quinta do Marquês, 2780-159 Oeiras, Portugal
| | - Esther Menéndez
- INIAV, I.P. - Instituto Nacional de Investigação Agrária e Veterinária, Quinta do Marquês, 2780-159 Oeiras, Portugal
- Department of Microbiology and Genetics / Spanish-Portuguese Institute for Agricultural Research (CIALE). University of Salamanca, 37007, Salamanca, Spain
| | - Fouad Mokrini
- Plant Protection Laboratory, INRA, Centre Régional de la Recherche Agronomique (CRRA), Rabat, Morocco
| | - Essaid Ait Barka
- Unité de Recherche Résistance Induite et Bio-protection des Plantes, EA 4707, USC, INRAe1488, Université de Reims Champagne-Ardenne, France
| | - Manuel Galvão de Melo e Mota
- NemaLab, MED – Mediterranean Institute for Agriculture, Environment and Development & Department of Biology, Escola de Ciências e Tecnologia, Universidade de Évora, Pólo da Mitra, Ap. 94, 7006-554 Évora, Portugal
| | - Gary Peng
- Saskatoon Research Development Centre, Agriculture and Agri-Food, Saskatchewan, Canada
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