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Meepagala KM, Anderson CM, Techen N, Duke SO. Pantoea ananatis, a plant growth stimulating bacterium, and its metabolites isolated from Hydrocotyle umbellata (dollarweed). PLANT SIGNALING & BEHAVIOR 2024; 19:2331894. [PMID: 38516998 PMCID: PMC10962587 DOI: 10.1080/15592324.2024.2331894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/22/2024] [Indexed: 03/23/2024]
Abstract
A bacterium growing on infected leaves of Hydrocotyle umbellata, commonly known as dollarweed, was isolated and identified as Pantoea ananatis. An ethyl acetate extract of tryptic soy broth (TSB) liquid culture filtrate of the bacterium was subjected to silica gel chromatography to isolate bioactive molecules. Indole was isolated as the major compound that gave a distinct, foul odor to the extract, together with phenethyl alcohol, phenol, tryptophol, N-acyl-homoserine lactone, 3-(methylthio)-1-propanol, cyclo(L-pro-L-tyr), and cyclo(dehydroAla-L-Leu). This is the first report of the isolation of cyclo(dehydroAla-L-Leu) from a Pantoea species. Even though tryptophol is an intermediate in the indoleacetic acid (IAA) pathway, we were unable to detect or isolate IAA. We investigated the effect of P. ananatis inoculum on the growth of plants. Treatment of Lemna paucicostata Hegelm plants with 4 × 109 colony forming units of P. ananatis stimulated their growth by ca. five-fold after 13 days. After 13 days of treatment, some control plants were browning, but treated plants were greener and no plants were browning. The growth of both Cucumis sativus (cucumber) and Sorghum bicolor (sorghum) plants was increased by ca. 20 to 40%, depending on the growth parameter and species, when the rhizosphere was treated with the bacterium after germination at the same concentration. Plant growth promotion by Pantoea ananatis could be due to the provision of the IAA precursor indole.
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Affiliation(s)
- Kumudini M. Meepagala
- United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University, USA
| | - Caleb M. Anderson
- United States Department of Agriculture, Agricultural Research Service, Natural Products Utilization Research Unit, University, USA
- Department of Microbiology and Molecular Medicine, University of Geneva, Geneva, Switzerland
| | - Natascha Techen
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, USA
| | - Stephen O. Duke
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, USA
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Thongnok S, Siripornadulsil W, Thanwisai L, Siripornadulsil S. As(III)-oxidizing and plant growth-promoting bacteria increase the starch biosynthesis-related enzyme activity, 2-AP levels, and grain quality of arsenic-stressed rice plants. BMC PLANT BIOLOGY 2024; 24:672. [PMID: 39004728 DOI: 10.1186/s12870-024-05352-6] [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: 03/12/2024] [Accepted: 06/27/2024] [Indexed: 07/16/2024]
Abstract
BACKGROUND Grain quality is an important index of rice production, particularly when plants are grown under stress. Arsenic (As) contamination in paddy fields severely affects rice grain yield and quality. Here, the effects of As and combinations of As(III)-oxidizing bacteria (Pseudomonas stutzeri 4.25, 4.27, and 4.44) and plant growth-promoting bacteria (Delftia acidovorans KKU2500-12 and Cupriavidus taiwanensis KKU2500-3) on enzymes related to starch accumulation in grains and the grain quality of Khao Dawk Mali 105 rice cultivated in As-contaminated soil under greenhouse conditions were investigated. RESULTS Arsenic affected the activities of starch biosynthesis-related enzymes, and decreases of up to 76.27%, 71.53%, 49.74%, 73.39%, and 47.46% in AGPase, SSS, GBSS, SBE, and SDBE activities, respectively, and 9.42-61.07% in starch accumulation in grains were detected after growth in As-contaminated soil. However, the KKU2500-3/4.25 and KKU2500-3/4.44 combinations yielded the greatest enzyme activities in grains, and compared with the results observed in uninoculated seedlings, increases in starch accumulation of up to 51.16% and 23.81% were found in the inoculated seedlings after growth in medium- and high-As-contaminated soils, at 10-17 and 10-24 days after anthesis, respectively. The bacteria increased the 2-AP content in rice under As stress, possibly via the induction of proline, a 2-AP substrate. Bacterium-inoculated rice had significantly greater 2-AP levels than uninoculated rice, and 2.16-9.93% and 26.57-42.04% increases were detected in rice plants grown in medium- and high-As-contaminated soils, respectively. CONCLUSIONS Arsenic toxicity can be mitigated in rice growing under greenhouse conditions by maintaining starch biosynthesis, accumulating amylose, and increasing 2-AP content. The effectiveness of these bacteria should be validated in paddy fields; hence, safe rice grains with a good starch content and aroma could be produced.
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Affiliation(s)
- Sarun Thongnok
- Department of Microbiology, Faculty of Science, Khon Kaen University, 123 Mittraphap Road, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand
| | - Wilailak Siripornadulsil
- Department of Microbiology, Faculty of Science, Khon Kaen University, 123 Mittraphap Road, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand
- Research Center for Environmental and Hazardous Substance Management, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Lalita Thanwisai
- Department of Microbiology, Faculty of Science, Khon Kaen University, 123 Mittraphap Road, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand
| | - Surasak Siripornadulsil
- Department of Microbiology, Faculty of Science, Khon Kaen University, 123 Mittraphap Road, Nai-Muang, Muang District, Khon Kaen, 40002, Thailand.
- Research Center for Environmental and Hazardous Substance Management, Khon Kaen University, Khon Kaen, 40002, Thailand.
- Salt-tolerant Rice Research Group, Khon Kaen University, Khon Kaen, 40002, Thailand.
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Humaira Z, Cho D, Peng Y, Avila F, Park YL, Kim CY, Lee J. Demequina capsici sp. nov., a novel plant growth-promoting actinomycete isolated from the rhizosphere of bell pepper (Capsicum annuum). Sci Rep 2024; 14:15830. [PMID: 38982145 PMCID: PMC11233565 DOI: 10.1038/s41598-024-66202-x] [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: 05/10/2024] [Accepted: 06/28/2024] [Indexed: 07/11/2024] Open
Abstract
Demequina, commonly found in coastal and marine environments, represents a genus of Actinomycetes. In this study, strains Demequina PMTSA13T and OYTSA14 were isolated from the rhizosphere of Capsicum annuum, leading to the discovery of a novel species, Demequina capsici. Bacteria play a significant role in plant growth, yet there have been no reports of the genus Demequina acting as plant growth-promoting bacteria (PGPB). Comparative genomics analysis revealed ANI similarity values of 74.05-80.63% for PMTSA13T and 74.02-80.54% for OYTSA14, in comparison to various Demequina species. The digital DNA-DNA hybridization (dDDH) values for PMTSA13T ranged from 19 to 39%, and 19.1-38.6% for OYTSA14. Genome annotation revealed the presence of genes associated with carbohydrate metabolism and transport, suggesting a potential role in nutrient cycling and availability for plants. These strains were notably rich in genes related to 'carbohydrate metabolism and transport (G)', according to their Cluster of Orthologous Groups (COG) classification. Additionally, both strains were capable of producing auxin (IAA) and exhibited enzymatic activities for cellulose degradation and catalase. Furthermore, PMTSA13T and OYTSA14 significantly induced the growth of Arabidopsis thaliana seedlings primarily attributed to their capacity to produce IAA, which plays a crucial role in stimulating plant growth and development. These findings shed light on the potential roles of Demequina strains in plant-microbe interactions and agricultural applications. The type strain is Demequina capsici PMTSA13T (= KCTC 59028T = GDMCC 1.4451T), meanwhile OYTSA14 is identified as different strains of Demequina capsici.
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Affiliation(s)
- Zalfa Humaira
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeollabuk-do, 56212, Republic of Korea
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, University of Science and Technology (UST), Yuseong, Daejeon, 34113, Republic of Korea
| | - Donghyun Cho
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeollabuk-do, 56212, Republic of Korea
| | - Yuxin Peng
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeollabuk-do, 56212, Republic of Korea
| | - Forbes Avila
- Animal Model Research Group, Jeonbuk Branch Institute, Korea Institute of Toxicology, Jeongeup, Jeollabuk-do, 56212, Republic of Korea
- Human and Environmental Toxicology, University of Science and Technology (UST), Yuseong, Daejeon, 34113, Republic of Korea
| | - Yu Lim Park
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeollabuk-do, 56212, Republic of Korea
| | - Cha Young Kim
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeollabuk-do, 56212, Republic of Korea
| | - Jiyoung Lee
- Korean Collection for Type Cultures (KCTC), Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Jeollabuk-do, 56212, Republic of Korea.
- Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, University of Science and Technology (UST), Yuseong, Daejeon, 34113, Republic of Korea.
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Husaini AM, Sohail M. Agrochemical-free genetically modified and genome-edited crops: Towards achieving the United Nations sustainable development goals and a 'greener' green revolution. J Biotechnol 2024; 389:68-77. [PMID: 38663518 DOI: 10.1016/j.jbiotec.2024.04.015] [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: 03/07/2024] [Revised: 04/22/2024] [Accepted: 04/23/2024] [Indexed: 05/28/2024]
Abstract
Sustainable farming on ever-shrinking agricultural land and declining water resources for the growing human population is one of the greatest environmental and food security challenges of the 21st century. Conventional, age-old organic farming practices alone, and foods based on costly cellular agriculture, do not have the potential to be upscaled to meet the food supply challenges for feeding large populations. Additionally, agricultural practices relying on chemical inputs have a well-documented detrimental impact on human health and the environment. As the available farming methods have reached their productivity limits, new approaches to agriculture, combining friendly, age-old farming practices with modern technologies that exclude chemical interventions, are necessary to address the food production challenges. Growing genetically modified (GM) crops without chemical inputs can allow agricultural intensification with reduced adverse health and environmental impacts. Additionally, integrating high-value pleiotropic genes in their genetic improvement coupled with the use of modern agricultural technologies, like robotics and artificial intelligence (AI), will further improve productivity. Such 'organic-GM' crops will offer consumers healthy, agrochemical-free GM produce. We believe these agricultural practices will lead to the beginning of a potentially new chemical-free GM agricultural revolution in the era of Agriculture 4.0 and help meet the targets of the United Nations Sustainable Development Goals (SDGs). Furthermore, given the advancement in the genome editing (GE) toolbox, we ought to develop a new category of 'trait-reversible GM crops' to avert the fears of those who believe in ecological damage by GM crops. Thus, in this article, we advocate farming with no or minimal chemical use by combining chemical-free organic farming with the existing biofortified and multiple stress tolerant GM crops, while focusing on the development of novel 'biofertilizer-responsive GE crops' and 'trait-reversible GE crops' for the future.
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Affiliation(s)
- Amjad M Husaini
- Genome Engineering and Societal Biotechnology Lab, Division of Plant Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Shalimar, Jammu and Kashmir, India.
| | - Muhammad Sohail
- Wolfson College, Lintodn Road, University of Oxford, Oxford, United Kingdom
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Negi R, Sharma B, Jan T, Kaur T, Chowdhury S, Kapoor M, Singh S, Kumar A, Rai AK, Rustagi S, Shreaz S, Kour D, Ahmed N, Kumar K, Yadav AN. Microbial Consortia: Promising Tool as Plant Bioinoculants for Agricultural Sustainability. Curr Microbiol 2024; 81:222. [PMID: 38874817 DOI: 10.1007/s00284-024-03755-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 05/31/2024] [Indexed: 06/15/2024]
Abstract
In the present scenario, growing population demands more food, resulting in the need for sustainable agriculture. Numerous approaches are explored in response to dangers and obstacles to sustainable agriculture. A viable approach is to be exploiting microbial consortium, which generate diverse biostimulants with growth-promoting characteristics for plants. These bioinoculants play an indispensable role in optimizing nutrient uptake efficiency mitigating environmental stress. Plant productivity is mostly determined by the microbial associations that exist at the rhizospheric region of plants. The engineered consortium with multifunctional attributes can be effectively employed to improve crop growth efficacy. A number of approaches have been employed to identify the efficient consortia for plant growth and enhanced crop productivity. Various plant growth-promoting (PGP) microbes with host growth-supporting characteristics were investigated to see if they might work cohesively and provide a cumulative effect for improved growth and crop yield. The effective microbial consortia should be assessed using compatibility tests, pot experimentation techniques, generation time, a novel and quick plant bioassay, and sensitivity to external stimuli (temperature, pH). The mixture of two or more microbial strains found in the root microbiome stimulates plant growth and development. The present review deals with mechanism, formulation, inoculation process, commercialization, and applications of microbial consortia as plant bioinoculants for agricultural sustainability.
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Affiliation(s)
- Rajeshwari Negi
- Department of Genetics, Plant Breeding and Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Babita Sharma
- Department of Microbiology, Akal College of Basic Science, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Tawseefa Jan
- Department of Food Technology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Tanvir Kaur
- Department of Genetics, Plant Breeding and Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Sohini Chowdhury
- Chitkara Center for Research and Development, Chitkara University, Baddi, Himachal Pradesh, India
| | - Monit Kapoor
- Centre of Research Impact and Outcome, Chitkara University, Rajpura, Punjab, India
| | - Sangram Singh
- Department of Biochemistry, Dr. Ram Manohar Lohia Avadh University, Faizabad, Uttar Pradesh, India
| | - Anu Kumar
- University Institute of Biotechnology, Chandigarh University, Mohali, 140413, Punjab, India
| | - Ashutosh Kumar Rai
- Department of Biochemistry, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Kingdom of Saudi Arabia
| | - Sarvesh Rustagi
- Department of Food Technology, School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Sheikh Shreaz
- Environment and Life Sciences Research Center, Kuwait Institute for Scientific Research, PO Box 24885, 13109, Safat, Kuwait
| | - Divjot Kour
- Department of Microbiology, Akal College of Basic Science, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Naseer Ahmed
- Department of Food Technology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Krishan Kumar
- Department of Food Technology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Ajar Nath Yadav
- Department of Genetics, Plant Breeding and Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India.
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6
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Gamalero E, Glick BR. Use of plant growth-promoting bacteria to facilitate phytoremediation. AIMS Microbiol 2024; 10:415-448. [PMID: 38919713 PMCID: PMC11194615 DOI: 10.3934/microbiol.2024021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/31/2024] [Accepted: 06/04/2024] [Indexed: 06/27/2024] Open
Abstract
Here, phytoremediation studies of toxic metal and organic compounds using plants augmented with plant growth-promoting bacteria, published in the past few years, were summarized and reviewed. These studies complemented and extended the many earlier studies in this area of research. The studies summarized here employed a wide range of non-agricultural plants including various grasses indigenous to regions of the world. The plant growth-promoting bacteria used a range of different known mechanisms to promote plant growth in the presence of metallic and/or organic toxicants and thereby improve the phytoremediation ability of most plants. Both rhizosphere and endophyte PGPB strains have been found to be effective within various phytoremediation schemes. Consortia consisting of several PGPB were often more effective than individual PGPB in assisting phytoremediation in the presence of metallic and/or organic environmental contaminants.
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Affiliation(s)
- Elisa Gamalero
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, Alessandria, 15121, Italy
| | - Bernard R. Glick
- Department of Biology, University of Waterloo, Waterloo, ON, Canada N2L 3G1
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Kifushi M, Nishikawa Y, Hosokawa M, Ide K, Kogawa M, Anai T, Takeyama H. Analysis of microbial dynamics in the soybean root-associated environments from community to single-cell levels. J Biosci Bioeng 2024; 137:429-436. [PMID: 38570219 DOI: 10.1016/j.jbiosc.2024.02.007] [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: 09/22/2023] [Revised: 01/04/2024] [Accepted: 02/20/2024] [Indexed: 04/05/2024]
Abstract
Plant root-associated environments such as the rhizosphere, rhizoplane, and endosphere, are notably different from non-root-associated soil environments. However, the microbial dynamics in these spatially divided compartments remain unexplored. In this study, we propose a combinational analysis of single-cell genomics with 16S rRNA gene sequencing. This method enabled us to understand the entire soil microbiome and individual root-associated microorganisms. We applied this method to soybean microbiomes and revealed that their composition was different between the rhizoplane and rhizosphere in the early growth stages, but became more similar as growth progressed. In addition, a total of 610 medium- to high-quality single-amplified genomes (SAGs) were acquired, including plant growth-promoting rhizobacteria (PGPR) candidates while genomes with high GC content tended to be missed by SAGs. The whole-genome analyses of the SAGs suggested that rhizoplane-enriched Flavobacterium solubilizes organophosphate actively and Bacillus colonizes roots more efficiently. Single-cell genomics, together with 16S rRNA gene sequencing, enabled us to connect microbial taxonomy and function, and assess microorganisms at a strain resolution even in the complex soil microbiome.
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Affiliation(s)
- Masako Kifushi
- Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan; Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yohei Nishikawa
- Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; Research Organization for Nano and Life Innovation, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
| | - Masahito Hosokawa
- Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan; Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; Research Organization for Nano and Life Innovation, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan; Institute for Advanced Research of Biosystem Dynamics, Waseda Research Institute for Science and Engineering, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Keigo Ide
- Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan; Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Masato Kogawa
- Research Organization for Nano and Life Innovation, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan
| | - Toyoaki Anai
- Faculty of Agriculture, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Haruko Takeyama
- Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan; Computational Bio Big-Data Open Innovation Laboratory, National Institute of Advanced Industrial Science and Technology, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan; Research Organization for Nano and Life Innovation, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan; Institute for Advanced Research of Biosystem Dynamics, Waseda Research Institute for Science and Engineering, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan.
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8
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Ahmed A, He P, He Y, Singh BK, Wu Y, Munir S, He P. Biocontrol of plant pathogens in omics era-with special focus on endophytic bacilli. Crit Rev Biotechnol 2024; 44:562-580. [PMID: 37055183 DOI: 10.1080/07388551.2023.2183379] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 02/06/2023] [Indexed: 04/15/2023]
Abstract
Nearly all plants and their organs are inhabited by endophytic microbes which play a crucial role in plant fitness and stress resilience. Harnessing endophytic services can provide effective solutions for a sustainable increase in agriculture productivity and can be used as a complement or alternative to agrochemicals. Shifting agriculture practices toward the use of nature-based solutions can contribute directly to the global challenges of food security and environmental sustainability. However, microbial inoculants have been used in agriculture for several decades with inconsistent efficacy. Key reasons of this inconsistent efficacy are linked to competition with indigenous soil microflora and inability to colonize plants. Endophytic microbes provide solutions to both of these issues which potentially make them better candidates for microbial inoculants. This article outlines the current advancements in endophytic research with special focus on endophytic bacilli. A better understanding of diverse mechanisms of disease control by bacilli is essential to achieve maximum biocontrol efficacy against multiple phytopathogens. Furthermore, we argue that integration of emerging technologies with strong theoretical frameworks have the potential to revolutionize biocontrol approaches based on endophytic microbes.
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Affiliation(s)
- Ayesha Ahmed
- State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Pengfei He
- State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Yueqiu He
- State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Brajesh K Singh
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith South, New South Wales, Australia
- Global Centre for Land Based Innovation, Western Sydney University, Penrith South, New South Wales, Australia
| | - Yixin Wu
- State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Shahzad Munir
- State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
| | - Pengbo He
- State Key Laboratory for Conservation and Utilization of Bio-resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, China
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Chan TH, Ariyawansa HA, Rho H. Thermotolerant plant growth-promoting bacteria enhance growth and nutrient uptake of lettuce under heat stress conditions by altering stomatal movement and chlorophyll fluorescence. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2024; 30:969-984. [PMID: 38974362 PMCID: PMC11222360 DOI: 10.1007/s12298-024-01470-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 05/21/2024] [Accepted: 06/10/2024] [Indexed: 07/09/2024]
Abstract
This study investigates the effects of selected PGPB on lettuce growth performance under heat-stress conditions. Bacterial plant growth-promoting potentials have been characterized and identified successfully in ongoing studies. Based on in vitro plant growth-promoting potential, the top five bacteria were ranked and identified as Acinetobacter sp. GRB12, Bacillus sp. GFB04, Klebsiella sp. LFB06, Klebsiella sp. GRB10, and Klebsiella sp. GRB04. They were mixed to inoculate on lettuce (Lactuca sativa L.) in temperature-controlled greenhouses. Another in-vivo chamber experiment was conducted by using Bacillus sp. GFB04 and Klebsiella sp. GFB10. Plant physiological traits (chlorophyll fluorescence and transpiration) and nutrient contents were measured at harvest, along with growth, development, and yield component analyses. Uninoculated plants under heat-stress condition showed poor growth performance. In contrast, plants with PGPB inoculation showed improved growth under heat-stress conditions, as the uptake of nutrients was facilitated by the symbionts. Inoculation also improved lettuce photosystem II efficiency and decreased total water use under heat stress. In conclusion, the current study suggests that PGPB inoculation successfully enhances lettuce heat-tolerance. PGPB application could potentially help improve sustainable production of lettuce with less fertilization under increasing temperatures. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-024-01470-5.
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Affiliation(s)
- Tsz Hei Chan
- Department of Horticulture and Landscape Architecture, National Taiwan University, Taipei, 10617 Taiwan
| | - Hiran Anjana Ariyawansa
- Department of Plant Pathology and Microbiology, National Taiwan University, Taipei, 10617 Taiwan
| | - Hyungmin Rho
- Department of Horticulture and Landscape Architecture, National Taiwan University, Taipei, 10617 Taiwan
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10
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Gao H, Huang Z, Chen W, Xing A, Zhao S, Wan W, Hu H, Li H. Mild to moderate drought stress reinforces the role of functional microbiome in promoting growth of a dominant forage species ( Neopallasia pectinata) in desert steppe. Front Microbiol 2024; 15:1371208. [PMID: 38841054 PMCID: PMC11150836 DOI: 10.3389/fmicb.2024.1371208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 05/09/2024] [Indexed: 06/07/2024] Open
Abstract
Background Desert steppe ecosystems are prone to drought stress, which influences the ecological balance and sustainable development of grasslands. In addition to directly restrict plant growth, drought stress indirectly impacts plant fitness by altering the diversity and function of root-associated microbiomes. This begs the question of whether the functional microbiome of forage plants, represented by synthetic microbial communities (SynComs), can be leveraged to mitigate drought stress in desert steppes and promote the ecological restoration of these fragile ecosystems. Methods A pot experiment was conducted to evaluate the role of SynComs in improving the plant growth and drought stress resistance of Neopallasia pectinata (Pall.) Poljak in desert steppe in Inner Mongolia, China. Six SynComs were derived from the rhizosphere and root endosphere of 12 dominant forage species in the desert steppe. Each SynCom comprised two to three bacterial genera (Bacillus, Protomicromonospora, and Streptomyces). We examined the capacities of different SynComs for nutrient solubilization, phytohormone secretion, and enzymatic activity. Results Under no water stress (75% soil water holding capacity, WHC), single strains performed better than SynComs in promoting plant growth in terms of stem diameter, root length, and plant dry weight, with the greatest effects observed for Streptomyces coeruleorubidus ATCC 13740 (p < 0.05). However, under mild to moderate drought stress (55% and 35% WHC), SynComs outperformed single strains in enhancing plant biomass accumulation and inducing the production of resistance-related substances (p < 0.05). No significant effect of single strains and SynComs emerged under extreme drought stress (20% WHC). Conclusion This study underscores the potential of SynComs in facilitating forage plants to combat drought stress in desert steppe. Mild to moderate drought stress stimulates SynComs to benefit the growth of N. pectinata plants, despite a soil moisture threshold (21% WHC) exists for the microbial effect. The use of SynComs provides a promising strategy for the ecological restoration and sustainable utilization of desert steppes by manipulating the functional microbiome of forage plants.
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Affiliation(s)
| | | | | | | | | | | | | | - Haigang Li
- Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resources, Key Laboratory of Agricultural Ecological Security and Green Development at Universities of Inner Mongolia Autonomous Region, College of Grassland, Resources and Environment, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China
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11
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Miljaković D, Marinković J, Tamindžić G, Milošević D, Ignjatov M, Karačić V, Jakšić S. Bio-Priming with Bacillus Isolates Suppresses Seed Infection and Improves the Germination of Garden Peas in the Presence of Fusarium Strains. J Fungi (Basel) 2024; 10:358. [PMID: 38786713 PMCID: PMC11122518 DOI: 10.3390/jof10050358] [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: 04/05/2024] [Revised: 05/02/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024] Open
Abstract
Seed infection caused by Fusarium spp. is one of the major threats to the seed quality and yield of agricultural crops, including garden peas. The use of Bacillus spp. with multiple antagonistic and plant growth-promoting (PGP) abilities represents a potential disease control strategy. This study was performed to evaluate the biocontrol potential of new Bacillus spp. rhizosphere isolates against two Fusarium strains affecting garden peas. Six Bacillus isolates identified by 16S rDNA sequencing as B. velezensis (B42), B. subtilis (B43), B. mojavensis (B44, B46), B. amyloliquefaciens (B50), and B. halotolerans (B66) showed the highest in vitro inhibition of F. proliferatum PS1 and F. equiseti PS18 growth (over 40%). The selected Bacillus isolates possessed biosynthetic genes for endoglucanase (B42, B43, B50), surfactin (B43, B44, B46), fengycin (B44, B46), bacillomycin D (B42, B50), and iturin (B42), and were able to produce indole-3-acetic acid (IAA), siderophores, and cellulase. Two isolates, B. subtilis B43 and B. amyloliquefaciens B50, had the highest effect on final germination, shoot length, root length, shoot dry weight, root dry weight, and seedling vigor index of garden peas as compared to the control. Their individual or combined application reduced seed infection and increased seed germination in the presence of F. proliferatum PS1 and F. equiseti PS18, both after seed inoculation and seed bio-priming. The most promising results were obtained in the cases of the bacterial consortium, seed bio-priming, and the more pathogenic strain PS18. The novel Bacillus isolates may be potential biocontrol agents intended for the management of Fusarium seed-borne diseases.
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Affiliation(s)
- Dragana Miljaković
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia; (J.M.); (G.T.); (D.M.); (M.I.); (S.J.)
| | - Jelena Marinković
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia; (J.M.); (G.T.); (D.M.); (M.I.); (S.J.)
| | - Gordana Tamindžić
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia; (J.M.); (G.T.); (D.M.); (M.I.); (S.J.)
| | - Dragana Milošević
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia; (J.M.); (G.T.); (D.M.); (M.I.); (S.J.)
| | - Maja Ignjatov
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia; (J.M.); (G.T.); (D.M.); (M.I.); (S.J.)
| | - Vasiljka Karačić
- Faculty of Agriculture, University of Belgrade, 11080 Belgrade, Serbia;
| | - Snežana Jakšić
- Institute of Field and Vegetable Crops, 21000 Novi Sad, Serbia; (J.M.); (G.T.); (D.M.); (M.I.); (S.J.)
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12
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Fatema K, Mahmud NU, Gupta DR, Siddiqui MN, Sakif TI, Sarker A, Sharpe AG, Islam T. Enhancing rice growth and yield with weed endophytic bacteria Alcaligenes faecalis and Metabacillus indicus under reduced chemical fertilization. PLoS One 2024; 19:e0296547. [PMID: 38753661 PMCID: PMC11098348 DOI: 10.1371/journal.pone.0296547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 03/22/2024] [Indexed: 05/18/2024] Open
Abstract
Endophytic bacteria, recognized as eco-friendly biofertilizers, have demonstrated the potential to enhance crop growth and yield. While the plant growth-promoting effects of endophytic bacteria have been extensively studied, the impact of weed endophytes remains less explored. In this study, we aimed to isolate endophytic bacteria from native weeds and assess their plant growth-promoting abilities in rice under varying chemical fertilization. The evaluation encompassed measurements of mineral phosphate and potash solubilization, as well as indole-3-acetic acid (IAA) production activity by the selected isolates. Two promising strains, tentatively identified as Alcaligenes faecalis (BTCP01) from Eleusine indica (Goose grass) and Metabacillus indicus (BTDR03) from Cynodon dactylon (Bermuda grass) based on 16S rRNA gene phylogeny, exhibited noteworthy phosphate and potassium solubilization activity, respectively. BTCP01 demonstrated superior phosphate solubilizing activity, while BTDR03 exhibited the highest potassium (K) solubilizing activity. Both isolates synthesized IAA in the presence of L-tryptophan, with the detection of nifH and ipdC genes in their genomes. Application of isolates BTCP01 and BTDR03 through root dipping and spraying at the flowering stage significantly enhanced the agronomic performance of rice variety CV. BRRI dhan29. Notably, combining both strains with 50% of recommended N, P, and K fertilizer doses led to a substantial increase in rice grain yields compared to control plants receiving 100% of recommended doses. Taken together, our results indicate that weed endophytic bacterial strains BTCP01 and BTDR03 hold promise as biofertilizers, potentially reducing the dependency on chemical fertilizers by up to 50%, thereby fostering sustainable rice production.
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Affiliation(s)
- Kaniz Fatema
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
| | - Nur Uddin Mahmud
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
| | - Dipali Rani Gupta
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
| | - Md. Nurealam Siddiqui
- Department of Biochemistry and Molecular Biology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
| | - Tahsin Islam Sakif
- Keck Graduate Institute, Claremont, California, United States of America
| | - Aniruddha Sarker
- Residual Chemical Assessment Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeollabuk-do, Republic of Korea
| | - Andrew G. Sharpe
- Global Institute for Food Security, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Tofazzal Islam
- Institute of Biotechnology and Genetic Engineering (IBGE), Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
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13
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Remenyik J, Csige L, Dávid P, Fauszt P, Szilágyi-Rácz AA, Szőllősi E, Bacsó ZR, Szepsy Jnr I, Molnár K, Rácz C, Fidler G, Kállai Z, Stündl L, Dobos AC, Paholcsek M. Exploring the interplay between the core microbiota, physicochemical factors, agrobiochemical cycles in the soil of the historic tokaj mád wine region. PLoS One 2024; 19:e0300563. [PMID: 38626236 PMCID: PMC11020696 DOI: 10.1371/journal.pone.0300563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 02/29/2024] [Indexed: 04/18/2024] Open
Abstract
A Hungarian survey of Tokaj-Mád vineyards was conducted. Shotgun metabarcoding was applied to decipher the microbial-terroir. The results of 60 soil samples showed that there were three dominant fungal phyla, Ascomycota 66.36% ± 15.26%, Basidiomycota 18.78% ± 14.90%, Mucoromycota 11.89% ± 8.99%, representing 97% of operational taxonomic units (OTUs). Mutual interactions between microbiota diversity and soil physicochemical parameters were revealed. Principal component analysis showed descriptive clustering patterns of microbial taxonomy and resistance gene profiles in the case of the four historic vineyards (Szent Tamás, Király, Betsek, Nyúlászó). Linear discriminant analysis effect size was performed, revealing pronounced shifts in community taxonomy based on soil physicochemical properties. Twelve clades exhibited the most significant shifts (LDA > 4.0), including the phyla Verrucomicrobia, Bacteroidetes, Chloroflexi, and Rokubacteria, the classes Acidobacteria, Deltaproteobacteria, Gemmatimonadetes, and Betaproteobacteria, the order Sphingomonadales, Hypomicrobiales, as well as the family Sphingomonadaceae and the genus Sphingomonas. Three out of the four historic vineyards exhibited the highest occurrences of the bacterial genus Bradyrhizobium, known for its positive influence on plant development and physiology through the secretion of steroid phytohormones. During ripening, the taxonomical composition of the soil fungal microbiota clustered into distinct groups depending on altitude, differences that were not reflected in bacteriomes. Network analyses were performed to unravel changes in fungal interactiomes when comparing postveraison and preharvest samples. In addition to the arbuscular mycorrhiza Glomeraceae, the families Mycosphaerellacae and Rhyzopodaceae and the class Agaricomycetes were found to have important roles in maintaining soil microbial community resilience. Functional metagenomics showed that the soil Na content stimulated several of the microbiota-related agrobiogeochemical cycles, such as nitrogen and sulphur metabolism; steroid, bisphenol, toluene, dioxin and atrazine degradation and the synthesis of folate.
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Affiliation(s)
- Judit Remenyik
- Center for Complex Systems and Microbiome Innovations, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - László Csige
- Research Laboratory and Wine Academy of Mad, University of Debrecen, Mád, Hungary
| | - Péter Dávid
- Center for Complex Systems and Microbiome Innovations, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Péter Fauszt
- Center for Complex Systems and Microbiome Innovations, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Anna Anita Szilágyi-Rácz
- Center for Complex Systems and Microbiome Innovations, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Erzsébet Szőllősi
- Center for Complex Systems and Microbiome Innovations, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Zsófia Réka Bacsó
- Research Laboratory and Wine Academy of Mad, University of Debrecen, Mád, Hungary
| | - István Szepsy Jnr
- Research Laboratory and Wine Academy of Mad, University of Debrecen, Mád, Hungary
| | - Krisztina Molnár
- Centre for Precision Farming R&D Services, Faculty of Agriculture, Food Science and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Csaba Rácz
- Centre for Precision Farming R&D Services, Faculty of Agriculture, Food Science and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Gábor Fidler
- Center for Complex Systems and Microbiome Innovations, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Zoltán Kállai
- Department of Genetics and Applied Microbiology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - László Stündl
- Institute of Food Technology, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Attila Csaba Dobos
- Centre for Precision Farming R&D Services, Faculty of Agriculture, Food Science and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Melinda Paholcsek
- Center for Complex Systems and Microbiome Innovations, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
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14
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Guidinelle RB, Burak DL, Rangel OJP, Peçanha AL, Passos RR, Rocha LOD, Olivares FL, Mendonça EDS. Impact of historical soil management on the interaction of plant-growth-promoting bacteria with maize (Zea mays L.). Heliyon 2024; 10:e28754. [PMID: 38596071 PMCID: PMC11002591 DOI: 10.1016/j.heliyon.2024.e28754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 03/03/2024] [Accepted: 03/24/2024] [Indexed: 04/11/2024] Open
Abstract
Edaphic factors can modulate the effects of microbial inoculants on crop yield promotion. Given the potential complexity of microbial inoculant responses to diverse soil management practices, we hypothesize that sustainable management of soil and water irrigation may improve soil quality and enhance the effects of plant growth-promoting bacteria (PGPB). Consequently, the primary objective was to assess the effectiveness of microbial inoculants formulated with Herbaspirillum seropedicae (Hs) and Azospirillum brasilense (Ab) on maize growth in soils impacted by different historical conservation management systems. We evaluated two soil management systems, two irrigation conditions, and four treatments: T0 - without bioinoculant and 100% doses of NPK fertilization; T1 - Hs + humic substances and 40% of NPK fertilization; T2 - Ab and 40% of NPK fertilization; T3 - co-inoculation (Hs + Ab) and 40% of NPK fertilization. Using a reduced fertilization dose (40% NPK) associated with microbial inoculants proved efficient in increasing maize shoot dry mass : on average, there was a 16% reduction compared to the treatment with 100% fertilization. In co-inoculation (Hs + Ab), the microbial inoculants showed a mutualistic effect on plant response, higher than isolate ones, especially increasing the nitrogen content in no-tillage systems irrigated by swine wastewater. Under lower nutrient availability and higher biological soil quality, the microbial bioinputs positively influenced root development, instantaneous water use efficiency, stomatal conductance, and nitrogen contents.
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Affiliation(s)
- Rebyson Bissaco Guidinelle
- Federal University of Espírito Santo, Department of Agronomy, Alto Universitário, s/n, Guararema, 29.500-000, Alegre, ES, Brazil
- Post Graduate Programme in Agronomy, Center for Agricultural Sciences and Engineering, Federal University of Espírito Santo, Alto Universitário, s/n, Guararema, 12 29.500-000, Alegre, ES, Brazil
| | - Diego Lang Burak
- Federal University of Espírito Santo, Department of Agronomy, Alto Universitário, s/n, Guararema, 29.500-000, Alegre, ES, Brazil
| | - Otacilio José Passos Rangel
- Federal Institute of Espírito Santo/IFES, Campus Alegre, BR 482, Km 7, 29500-00, Alegre/Rive, Espírito Santo, Brazil
| | - Anderson Lopes Peçanha
- Federal University of Espírito Santo, Department of Biology, Alto Universitário, s/n, Guararema, 29.500-000, Alegre, ES, Brazil
| | - Renato Ribeiro Passos
- Federal University of Espírito Santo, Department of Agronomy, Alto Universitário, s/n, Guararema, 29.500-000, Alegre, ES, Brazil
| | - Letícia Oliveira da Rocha
- Laboratory of Cell and Tissue Biology and Center for Development of Biological Inputs for Agriculture, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-602, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - Fábio Lopes Olivares
- Laboratory of Cell and Tissue Biology and Center for Development of Biological Inputs for Agriculture, Universidade Estadual do Norte Fluminense Darcy Ribeiro, 28013-602, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - Eduardo de Sá Mendonça
- Federal University of Espírito Santo, Department of Agronomy, Alto Universitário, s/n, Guararema, 29.500-000, Alegre, ES, Brazil
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15
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Nkebiwe PM, Stevens Lekfeldt JD, Symanczik S, Thonar C, Mäder P, Bar-Tal A, Halpern M, Biró B, Bradáčová K, Caniullan PC, Choudhary KK, Cozzolino V, Di Stasio E, Dobczinski S, Geistlinger J, Lüthi A, Gómez-Muñoz B, Kandeler E, Kolberg F, Kotroczó Z, Kulhanek M, Mercl F, Tamir G, Moradtalab N, Piccolo A, Maggio A, Nassal D, Szalai MZ, Juhos K, Fora CG, Florea A, Poşta G, Lauer KF, Toth B, Tlustoš P, Mpanga IK, Weber N, Weinmann M, Yermiyahu U, Magid J, Müller T, Neumann G, Ludewig U, de Neergaard A. Effectiveness of bio-effectors on maize, wheat and tomato performance and phosphorus acquisition from greenhouse to field scales in Europe and Israel: a meta-analysis. FRONTIERS IN PLANT SCIENCE 2024; 15:1333249. [PMID: 38628362 PMCID: PMC11020074 DOI: 10.3389/fpls.2024.1333249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 03/11/2024] [Indexed: 04/19/2024]
Abstract
Biostimulants (Bio-effectors, BEs) comprise plant growth-promoting microorganisms and active natural substances that promote plant nutrient-acquisition, stress resilience, growth, crop quality and yield. Unfortunately, the effectiveness of BEs, particularly under field conditions, appears highly variable and poorly quantified. Using random model meta-analyses tools, we summarize the effects of 107 BE treatments on the performance of major crops, mainly conducted within the EU-funded project BIOFECTOR with a focus on phosphorus (P) nutrition, over five years. Our analyses comprised 94 controlled pot and 47 field experiments under different geoclimatic conditions, with variable stress levels across European countries and Israel. The results show an average growth/yield increase by 9.3% (n=945), with substantial differences between crops (tomato > maize > wheat) and growth conditions (controlled nursery + field (Seed germination and nursery under controlled conditions and young plants transplanted to the field) > controlled > field). Average crop growth responses were independent of BE type, P fertilizer type, soil pH and plant-available soil P (water-P, Olsen-P or Calcium acetate lactate-P). BE effectiveness profited from manure and other organic fertilizers, increasing soil pH and presence of abiotic stresses (cold, drought/heat or salinity). Systematic meta-studies based on published literature commonly face the inherent problem of publication bias where the most suspected form is the selective publication of statistically significant results. In this meta-analysis, however, the results obtained from all experiments within the project are included. Therefore, it is free of publication bias. In contrast to reviews of published literature, our unique study design is based on a common standardized protocol which applies to all experiments conducted within the project to reduce sources of variability. Based on data of crop growth, yield and P acquisition, we conclude that application of BEs can save fertilizer resources in the future, but the efficiency of BE application depends on cropping systems and environments.
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Affiliation(s)
- Peteh Mehdi Nkebiwe
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Jonas D. Stevens Lekfeldt
- Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Sarah Symanczik
- Department of Soil Sciences, Research Institute of Organic Agriculture FiBL, Frick, Switzerland
| | - Cécile Thonar
- Department of Soil Sciences, Research Institute of Organic Agriculture FiBL, Frick, Switzerland
| | - Paul Mäder
- Department of Soil Sciences, Research Institute of Organic Agriculture FiBL, Frick, Switzerland
| | - Asher Bar-Tal
- Institute of Plant Sciences, Agricultural Research Organization (ARO), Rishon LeZion, Israel
| | - Moshe Halpern
- Institute of Plant Sciences, Agricultural Research Organization (ARO), Rishon LeZion, Israel
- Gilat Research Center, Agricultural Research Organization, Gilat, Israel
| | - Borbala Biró
- Department of Agro-Environmental Studies, Hungarian University of Agriculture and Life Sciences, Budapest, Hungary
| | - Klára Bradáčová
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Pedro C. Caniullan
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Krishna K. Choudhary
- Institute of Plant Sciences, Agricultural Research Organization (ARO), Rishon LeZion, Israel
| | - Vincenza Cozzolino
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l’Ambiente, l’Agro-Alimentare ed i Nuovi Materiali (CERMANU), Università di Napoli Federico II, Portici, Italy
| | - Emilio Di Stasio
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, Italy
| | - Stefan Dobczinski
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Joerg Geistlinger
- Institute of Bioanalytical Sciences, Anhalt University of Applied Sciences, Bernburg, Germany
| | - Angelika Lüthi
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Beatriz Gómez-Muñoz
- Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Ellen Kandeler
- Institute of Soil Science and Land Evaluation, Soil Biology Department, University of Hohenheim, Stuttgart, Germany
| | - Flora Kolberg
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Zsolt Kotroczó
- Department of Agro-Environmental Studies, Hungarian University of Agriculture and Life Sciences, Budapest, Hungary
| | - Martin Kulhanek
- Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, Suchdol, Czechia
| | - Filip Mercl
- Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, Suchdol, Czechia
| | - Guy Tamir
- Institute of Plant Sciences, Agricultural Research Organization (ARO), Rishon LeZion, Israel
- Gilat Research Center, Agricultural Research Organization, Gilat, Israel
| | - Narges Moradtalab
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Alessandro Piccolo
- Centro Interdipartimentale di Ricerca sulla Risonanza Magnetica Nucleare per l’Ambiente, l’Agro-Alimentare ed i Nuovi Materiali (CERMANU), Università di Napoli Federico II, Portici, Italy
| | - Albino Maggio
- Department of Agricultural Sciences, University of Napoli Federico II, Portici, Italy
| | - Dinah Nassal
- Institute of Soil Science and Land Evaluation, Soil Biology Department, University of Hohenheim, Stuttgart, Germany
| | - Magdolna Zita Szalai
- Department of Agro-Environmental Studies, Hungarian University of Agriculture and Life Sciences, Budapest, Hungary
| | - Katalin Juhos
- Department of Agro-Environmental Studies, Hungarian University of Agriculture and Life Sciences, Budapest, Hungary
| | - Ciprian G. Fora
- Department of Horticulture, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania”, Timișoara, Romania
| | - Andreea Florea
- Department of Horticulture, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania”, Timișoara, Romania
| | - Gheorghe Poşta
- Department of Horticulture, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania”, Timișoara, Romania
| | - Karl Fritz Lauer
- Department of Horticulture, Banat’s University of Agricultural Sciences and Veterinary Medicine “King Michael I of Romania”, Timișoara, Romania
| | - Brigitta Toth
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
- Institute of Food Science, Faculty of Agricultural and Food Sciences and Agricultural Management, University of Debrecen, Debrecen, Hungary
| | - Pavel Tlustoš
- Department of Agro-Environmental Chemistry and Plant Nutrition, Czech University of Life Sciences in Prague, Suchdol, Czechia
| | - Isaac K. Mpanga
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Nino Weber
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Markus Weinmann
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Uri Yermiyahu
- Gilat Research Center, Agricultural Research Organization, Gilat, Israel
| | - Jakob Magid
- Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Torsten Müller
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Günter Neumann
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Uwe Ludewig
- Institute of Crop Science, Departments of Nutritional Crop Physiology and Fertilization and Soil Matter Dynamics, University of Hohenheim, Stuttgart, Germany
| | - Andreas de Neergaard
- Faculty of Science, Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg C, Denmark
- Roskilde University, Roskilde, Denmark
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Mandal M, Roy A, Das S, Rakwal R, Agrawal GK, Singh P, Awasthi A, Sarkar A. Food waste-based bio-fertilizers production by bio-based fermenters and their potential impact on the environment. CHEMOSPHERE 2024; 353:141539. [PMID: 38417498 DOI: 10.1016/j.chemosphere.2024.141539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 02/01/2024] [Accepted: 02/23/2024] [Indexed: 03/01/2024]
Abstract
Increasing food waste is creating a global waste (and management) crisis. Globally, ∼1.6 billion tons of food is wasted annually, worth ∼$1.2 trillion. By reducing this waste or by turning it into valuable products, numerous economic advantages can be realized, including improved food security, lower production costs, biodegradable products, environmental sustainability, and cleaner solutions to the growing world's waste and garbage management. The appropriate handling of these detrimental materials can significantly reduce the risks to human health. Food waste is available in biodegradable forms and, with the potential to speed up microbial metabolism effectively, has immense potential in improving bio-based fertilizer generation. Synthetic inorganic fertilizers severely affect human health, the environment, and soil fertility, thus requiring immediate consideration. To address these problems, agricultural farming is moving towards manufacturing bio-based fertilizers via utilizing natural bioresources. Food waste-based bio-fertilizers could help increase yields, nutrients, and organic matter and mitigate synthetic fertilizers' adverse effects. These are presented and discussed in the review.
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Affiliation(s)
- Mamun Mandal
- Laboratory of Applied Stress Biology, Department of Botany, University of Gour Banga, Malda, 732 103, West Bengal, India
| | - Anamika Roy
- Laboratory of Applied Stress Biology, Department of Botany, University of Gour Banga, Malda, 732 103, West Bengal, India
| | - Sujit Das
- Laboratory of Applied Stress Biology, Department of Botany, University of Gour Banga, Malda, 732 103, West Bengal, India
| | - Randeep Rakwal
- Institute of Health and Sport Sciences, Global Sport Innovation Bldg., Room 403, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan; GRADE Academy (Pvt.) Ltd., Birgunj, Nepal
| | | | - Pardeep Singh
- Department of Environmental Studies, PGDAV College, University of Delhi, New Delhi, 110065, India
| | - Amit Awasthi
- Department of Applied Sciences, University of Petroleum and Energy Studies, Dehradun, India
| | - Abhijit Sarkar
- Laboratory of Applied Stress Biology, Department of Botany, University of Gour Banga, Malda, 732 103, West Bengal, India.
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17
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Singh S, Shyu DJH. Perspective on utilization of Bacillus species as plant probiotics for different crops in adverse conditions. AIMS Microbiol 2024; 10:220-238. [PMID: 38525044 PMCID: PMC10955172 DOI: 10.3934/microbiol.2024011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/21/2024] [Accepted: 02/22/2024] [Indexed: 03/26/2024] Open
Abstract
Plant probiotic bacteria are a versatile group of bacteria isolated from different environmental sources to improve plant productivity and immunity. The potential of plant probiotic-based formulations is successfully seen as growth enhancement in economically important plants. For instance, endophytic Bacillus species acted as plant growth-promoting bacteria, influenced crops such as cowpea and lady's finger, and increased phytochemicals in crops such as high antioxidant content in tomato fruits. The present review aims to summarize the studies of Bacillus species retaining probiotic properties and compare them with the conventional fertilizers on the market. Plant probiotics aim to take over the world since it is the time to rejuvenate and restore the soil and achieve sustainable development goals for the future. Comprehensive coverage of all the Bacillus species used to maintain plant health, promote plant growth, and fight against pathogens is crucial for establishing sustainable agriculture to face global change. Additionally, it will give the latest insight into this multifunctional agent with a detailed biocontrol mechanism and explore the antagonistic effects of Bacillus species in different crops.
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Affiliation(s)
- Shubhra Singh
- Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung 912301, Taiwan
| | - Douglas J. H. Shyu
- Department of Biological Science and Technology, National Pingtung University of Science and Technology, Pingtung 912301, Taiwan
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18
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Guerrero-Egido G, Pintado A, Bretscher KM, Arias-Giraldo LM, Paulson JN, Spaink HP, Claessen D, Ramos C, Cazorla FM, Medema MH, Raaijmakers JM, Carrión VJ. bacLIFE: a user-friendly computational workflow for genome analysis and prediction of lifestyle-associated genes in bacteria. Nat Commun 2024; 15:2072. [PMID: 38453959 PMCID: PMC10920822 DOI: 10.1038/s41467-024-46302-y] [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: 07/13/2023] [Accepted: 02/21/2024] [Indexed: 03/09/2024] Open
Abstract
Bacteria have an extensive adaptive ability to live in close association with eukaryotic hosts, exhibiting detrimental, neutral or beneficial effects on host growth and health. However, the genes involved in niche adaptation are mostly unknown and their functions poorly characterized. Here, we present bacLIFE ( https://github.com/Carrion-lab/bacLIFE ) a streamlined computational workflow for genome annotation, large-scale comparative genomics, and prediction of lifestyle-associated genes (LAGs). As a proof of concept, we analyzed 16,846 genomes from the Burkholderia/Paraburkholderia and Pseudomonas genera, which led to the identification of hundreds of genes potentially associated with a plant pathogenic lifestyle. Site-directed mutagenesis of 14 of these predicted LAGs of unknown function, followed by plant bioassays, showed that 6 predicted LAGs are indeed involved in the phytopathogenic lifestyle of Burkholderia plantarii and Pseudomonas syringae pv. phaseolicola. These 6 LAGs encompassed a glycosyltransferase, extracellular binding proteins, homoserine dehydrogenases and hypothetical proteins. Collectively, our results highlight bacLIFE as an effective computational tool for prediction of LAGs and the generation of hypotheses for a better understanding of bacteria-host interactions.
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Affiliation(s)
- Guillermo Guerrero-Egido
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB, Wageningen, The Netherlands
- Departamento de Microbiología, Facultad de Ciencias, Campus Universitario de Teatinos s/n, Universidad de Málaga, 29010, Málaga, Spain
- Departamento de Protección de Cultivos, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora", Campus Universitario de Teatinos, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), 29010, Málaga, Spain
| | - Adrian Pintado
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
- Departamento de Microbiología, Facultad de Ciencias, Campus Universitario de Teatinos s/n, Universidad de Málaga, 29010, Málaga, Spain
- Departamento de Protección de Cultivos, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora", Campus Universitario de Teatinos, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), 29010, Málaga, Spain
| | - Kevin M Bretscher
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB, Wageningen, The Netherlands
- Departamento de Microbiología, Facultad de Ciencias, Campus Universitario de Teatinos s/n, Universidad de Málaga, 29010, Málaga, Spain
- Departamento de Protección de Cultivos, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora", Campus Universitario de Teatinos, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), 29010, Málaga, Spain
| | - Luisa-Maria Arias-Giraldo
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB, Wageningen, The Netherlands
| | - Joseph N Paulson
- Department of Data Sciences, N-Power Medicine, Redwood City, CA, 94063, USA
| | - Herman P Spaink
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Dennis Claessen
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Cayo Ramos
- Departamento de Protección de Cultivos, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora", Campus Universitario de Teatinos, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), 29010, Málaga, Spain
- Área de Genética, Facultad de Ciencias, Campus Universitario de Teatinos s/n, Universidad de Málaga, 29010, Málaga, Spain
| | - Francisco M Cazorla
- Departamento de Microbiología, Facultad de Ciencias, Campus Universitario de Teatinos s/n, Universidad de Málaga, 29010, Málaga, Spain
- Departamento de Protección de Cultivos, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora", Campus Universitario de Teatinos, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), 29010, Málaga, Spain
| | - Marnix H Medema
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
- Bioinformatics Group, Wageningen University, Droevendaalsesteeg 1, 6708 PB, Wageningen, The Netherlands
| | - Jos M Raaijmakers
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB, Wageningen, The Netherlands
| | - Víctor J Carrión
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands.
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Droevendaalsesteeg 10, 6708 PB, Wageningen, The Netherlands.
- Departamento de Microbiología, Facultad de Ciencias, Campus Universitario de Teatinos s/n, Universidad de Málaga, 29010, Málaga, Spain.
- Departamento de Protección de Cultivos, Instituto de Hortofruticultura Subtropical y Mediterránea "La Mayora", Campus Universitario de Teatinos, Universidad de Málaga-Consejo Superior de Investigaciones Científicas (IHSM-UMA-CSIC), 29010, Málaga, Spain.
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19
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Sharma P, Pandey R, Chauhan NS. Biofertilizer and biocontrol properties of Stenotrophomonas maltophilia BCM emphasize its potential application for sustainable agriculture. FRONTIERS IN PLANT SCIENCE 2024; 15:1364807. [PMID: 38501138 PMCID: PMC10944936 DOI: 10.3389/fpls.2024.1364807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 02/09/2024] [Indexed: 03/20/2024]
Abstract
Introduction Microbial biofertilizers or biocontrol agents are potential sustainable approaches to overcome the limitations of conventional agricultural practice. However, the limited catalog of microbial candidates for diversified crops creates hurdles in successfully implementing sustainable agriculture for increasing global/local populations. The present study aimed to explore the wheat rhizosphere microbiota for microbial strains with a biofertilizer and biocontrol potential. Methods Using a microbial culturing-based approach, 12 unique microbial isolates were identified and screened for biofertilizer/biocontrol potential using genomics and physiological experimentations. Results and discussion Molecular, physiological, and phylogenetic characterization identified Stenotrophomonas maltophilia BCM as a potential microbial candidate for sustainable agriculture. Stenotrophomonas maltophilia BCM was identified as a coccus-shaped gram-negative microbe having optimal growth at 37°C in a partially alkaline environment (pH 8.0) with a proliferation time of ~67 minutes. The stress response physiology of Stenotrophomonas maltophilia BCM indicates its successful survival in dynamic environmental conditions. It significantly increased (P <0.05) the wheat seed germination percentage in the presence of phytopathogens and saline conditions. Genomic characterization decoded the presence of genes involved in plant growth promotion, nutrient assimilation, and antimicrobial activity. Experimental evidence also correlates with genomic insights to explain the potential of Stenotrophomonas maltophilia BCM as a potential biofertilizer and biocontrol agent. With these properties, Stenotrophomonas maltophilia BCM could sustainably promote wheat production to ensure food security for the increasing population, especially in native wheat-consuming areas.
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Affiliation(s)
- Pinki Sharma
- Department of Biochemistry, Maharshi Dayanand University, Haryana, Rohtak, India
| | - Rajesh Pandey
- INtegrative GENomics of HOst-PathogEn (INGEN-HOPE) Laboratory, CSIR-Institute of Genomics and Integrative Biology Council of Scientific and Industrial Research (CSIR-IGIB), Delhi, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Nar Singh Chauhan
- Department of Biochemistry, Maharshi Dayanand University, Haryana, Rohtak, India
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20
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Bini D, Mattos BB, Figueiredo JEF, Dos Santos FC, Marriel IE, Dos Santos CA, de Oliveira-Paiva CA. Parameter evaluation for developing phosphate-solubilizing Bacillus inoculants. Braz J Microbiol 2024; 55:737-748. [PMID: 38008804 PMCID: PMC10920567 DOI: 10.1007/s42770-023-01182-0] [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: 07/31/2023] [Accepted: 11/11/2023] [Indexed: 11/28/2023] Open
Abstract
Bacterial inoculants have been used in agriculture to improve plant performance. However, laboratory and field requirements must be completed before a candidate can be employed as an inoculant. Therefore, this study aimed to evaluate the parameters for inoculant formulation and the potential of Bacillus subtilis (B70) and B. pumilus (B32) to improve phosphorus availability in maize (Zea mays L.) crops. In vitro experiments assessed the bacterial ability to solubilize and mineralize phosphate, their adherence to roots, and shelf life in cassava starch (CS), carboxymethyl cellulose (CMC), peat, and activated charcoal (AC) stored at 4 °C and room temperature for 6 months. A field experiment evaluated the effectiveness of strains to increase the P availability to plants growing with rock phosphate (RP) and a mixture of RP and triple superphosphate (TS) and their contribution to improving maize yield and P accumulation in grains. The B70 was outstanding in solubilizing RP and phytate mineralization and more stable in carriers and storage conditions than B32. However, root adherence was more noticeable in B32. Among carriers, AC was the most effective for preserving viable cell counts, closely similar to those of the initial inoculum of both strains. Maize productivity using the mixture RPTS was similar for B70 and B32. The best combination was B70 with RP, which improved the maize yield (6532 kg ha-1) and P accumulation in grains (15.95 kg ha-1). Our results indicated that the inoculant formulation with AC carrier and B70 is a feasible strategy for improving phosphorus mobilization in the soil and maize productivity.
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Affiliation(s)
- Daniel Bini
- Embrapa Milho E Sorgo, Sete Lagoas, MG, 35701-970, Brazil
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21
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Kashisaz M, Enayatizamir N, Fu P, Eslahi M. Synthesis of nanoparticles using Trichoderma Harzianum, characterization, antifungal activity and impact on Plant Growth promoting Bacteria. World J Microbiol Biotechnol 2024; 40:107. [PMID: 38396217 DOI: 10.1007/s11274-024-03920-4] [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: 06/16/2023] [Accepted: 02/03/2024] [Indexed: 02/25/2024]
Abstract
Globally cultivated cereals are frequently threatened by various plant pathogenic agents such as Fusarium fungi. To combat these pathogens, researchers have made nanoparticles as potential agricultural pesticides. In this study, selenium and titanium dioxide NPs were synthesized using Trichoderma harzianum metabolites. Characterization of the NPs indicated varying size and shapes of both NPs and functional groups existence to constitute both NPs. The evaluation of antifungal activity of NPs against plant pathogenic fungi, Fusarium culmorum, indicated both NPs maximum antifungal activity at concentration of 100 mg/L. The impacts of nanoparticles on some beneficial plant growth promoting bacteria (PGPB) were evaluated and showed their inhibition effect on optical density of PGPB at a concentration of 100 mg/L but they did not have any impact on nitrogen fixation by bacteria. Existence of TiO2NPs reduced the intensity of color change to pink compared to the control indicating auxin production. Both NPs demonstrated different impact on phosphate solubilization index. This study suggests that the synthesized nanoparticles have the potential to serve as antifungal compounds at special concentration against plant diseases without significantly reducing the potential of PGPB at low concentrations.
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Affiliation(s)
- Marayam Kashisaz
- Department of Soil Sciecne, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Naeimeh Enayatizamir
- Department of Soil Sciecne, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
| | - Pengcheng Fu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China
| | - Mohammadreza Eslahi
- Department of Plant Protection, Khuzestan Agricultural and Natural Resource Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Ahvaz, Iran
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22
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Tian Z, Wang X, Li Y, Xi Y, He M, Guo Y. Co-inoculation of Soybean Seedling with Trichoderma asperellum and Irpex laceratus Promotes the Absorption of Nitrogen and Phosphorus. Curr Microbiol 2024; 81:87. [PMID: 38311653 DOI: 10.1007/s00284-023-03571-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 11/22/2023] [Indexed: 02/06/2024]
Abstract
Soybean are one of the main oil crops in the world. The study demonstrated that co-inoculation with Trichoderma asperellum (Sordariomycetes, Hypocreomycetidae) and Irpex laceratus (Basidiomycota, Polyporales) isolated from Kosteletzkya virginica can promote the growth of soybean seedlings. The two fungi were found to produce various enzymes, including cellulase, amylase, laccase, protease, and urease. Upon inoculation, T. asperellum mainly colonized within the phloem of the roots in soybean seedlings, while I. laceratus mainly in the xylem and phloem of the roots. Physiological parameters, such as plant height, root length, and fresh weight, were significantly increased in soybean seedlings co-inoculated with T. asperellum and I. laceratus. Moreover, the expression of key genes related to N and P absorption and metabolism was also increased, leading to improved N and P utilization efficiency in soybean seedlings. These results indicate that the two fungi may have complementary roles in promoting plant growth, co-inoculation with T. asperellum and I. laceratus can enhance the growth and nutrient uptake of soybean. These findings suggest that T. asperellum and I. laceratus have the potential to be used as bio-fertilizers to improve soybean growth and yield.
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Affiliation(s)
- Zengyuan Tian
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Xiaomin Wang
- School of Life Sciences, Zhengzhou University, Kexue Road 100, Zhengzhou, 450001, China
| | - Yanyi Li
- School of Life Sciences, Zhengzhou University, Kexue Road 100, Zhengzhou, 450001, China
| | - Yu Xi
- School of Life Sciences, Zhengzhou University, Kexue Road 100, Zhengzhou, 450001, China
| | - Mengting He
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China
| | - Yuqi Guo
- School of Life Sciences, Zhengzhou University, Kexue Road 100, Zhengzhou, 450001, China.
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23
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Wdowiak-Wróbel S, Kalita M, Palusińska-Szysz M, Marek-Kozaczuk M, Sokołowski W, Coutinho TA. Pantoea trifolii sp. nov., a novel bacterium isolated from Trifolium rubens root nodules. Sci Rep 2024; 14:2698. [PMID: 38302681 PMCID: PMC10834434 DOI: 10.1038/s41598-024-53200-2] [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: 08/13/2023] [Accepted: 01/29/2024] [Indexed: 02/03/2024] Open
Abstract
A novel bacterium, designated strain MMK2T, was isolated from a surface-sterilised root nodule of a Trifolium rubens plant growing in south-eastern Poland. Cells were Gram negative, non-spore forming and rod shaped. The strain had the highest 16S rRNA gene sequence similarity with P. endophytica (99.4%), P. leporis (99.4%) P. rwandensis (98.8%) and P. rodasii (98.45%). Phylogenomic analysis clearly showed that strain MMK2T and an additional strain, MMK3, should reside in the genus Pantoea and that they were most closely related to P. endophytica and P. leporis. Genome comparisons showed that the novel strain shared 82.96-93.50% average nucleotide identity and 26.2-53. 2% digital DNA:DNA hybridization with closely related species. Both strains produced siderophores and were able to solubilise phosphates. The MMK2T strain was also able to produce indole-3-acetic acid. The tested strains differed in their antimicrobial activity, but both were able to inhibit the growth of Sclerotinia sclerotiorum 10Ss01. Based on the results of the phenotypic, phylogenomic, genomic and chemotaxonomic analyses, strains MMK2T and MMK3 belong to a novel species in the genus Pantoea for which the name Pantoea trifolii sp. nov. is proposed with the type strain MMK2T (= DSM 115063T = LMG 33049T).
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Affiliation(s)
- Sylwia Wdowiak-Wróbel
- Department of Genetics and Microbiology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Michał Kalita
- Department of Genetics and Microbiology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland.
| | - Marta Palusińska-Szysz
- Department of Genetics and Microbiology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Monika Marek-Kozaczuk
- Department of Genetics and Microbiology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Wojciech Sokołowski
- Department of Genetics and Microbiology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Akademicka 19, 20-033, Lublin, Poland
| | - Teresa A Coutinho
- Department of Biochemistry, Genetics and Microbiology, Centre for Microbial Ecology and Genomics/Forestry and Agricultural Biotechnology Institute, University of Pretoria, Pretoria, 0002, South Africa
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24
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Singh D, Thapa S, Singh JP, Mahawar H, Saxena AK, Singh SK, Mahla HR, Choudhary M, Parihar M, Choudhary KB, Chakdar H. Prospecting the Potential of Plant Growth-Promoting Microorganisms for Mitigating Drought Stress in Crop Plants. Curr Microbiol 2024; 81:84. [PMID: 38294725 DOI: 10.1007/s00284-023-03606-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Accepted: 12/28/2023] [Indexed: 02/01/2024]
Abstract
Drought is a global phenomenon affecting plant growth and productivity, the severity of which has impacts around the whole world. A number of approaches, such as agronomic, conventional breeding, and genetic engineering, are followed to increase drought resilience; however, they are often time consuming and non-sustainable. Plant growth-promoting microorganisms are used worldwide to mitigate drought stress in crop plants. These microorganisms exhibit multifarious traits, which not only help in improving plant and soil health, but also demonstrate capabilities in ameliorating drought stress. The present review highlights various adaptive strategies shown by these microbes in improving drought resilience, such as modulation of various growth hormones and osmoprotectant levels, modification of root morphology, exopolysaccharide production, and prevention of oxidative damage. Gene expression patterns providing an adaptive edge for further amelioration of drought stress have also been studied in detail. Furthermore, the practical applications of these microorganisms in soil are highlighted, emphasizing their potential to increase crop productivity without compromising long-term soil health. This review provides a comprehensive coverage of plant growth-promoting microorganisms-mediated drought mitigation strategies, insights into gene expression patterns, and practical applications, while also guiding future research directions.
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Affiliation(s)
- Devendra Singh
- ICAR-Central Arid Zone Research Institute, Jodhpur, 342003, India
| | - Shobit Thapa
- ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, Mau, Uttar Pradesh, 275103, India
| | - Jyoti Prakash Singh
- ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, Mau, Uttar Pradesh, 275103, India
| | - Himanshu Mahawar
- ICAR-Directorate of Weed Research (DWR) Maharajpur, Jabalpur, 482004, India
| | - Anil Kumar Saxena
- ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, Mau, Uttar Pradesh, 275103, India
| | | | - Hans Raj Mahla
- ICAR-Central Arid Zone Research Institute, Jodhpur, 342003, India
| | | | - Manoj Parihar
- ICAR-Central Arid Zone Research Institute, Jodhpur, 342003, India
| | | | - Hillol Chakdar
- ICAR-National Bureau of Agriculturally Important Microorganisms, Kushmaur, Mau, Uttar Pradesh, 275103, India.
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25
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Meshram S, Adhikari TB. Microbiome-Mediated Strategies to Manage Major Soil-Borne Diseases of Tomato. PLANTS (BASEL, SWITZERLAND) 2024; 13:364. [PMID: 38337897 PMCID: PMC10856849 DOI: 10.3390/plants13030364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 02/12/2024]
Abstract
The tomato (Solanum lycopersicum L.) is consumed globally as a fresh vegetable due to its high nutritional value and antioxidant properties. However, soil-borne diseases can severely limit tomato production. These diseases, such as bacterial wilt (BW), Fusarium wilt (FW), Verticillium wilt (VW), and root-knot nematodes (RKN), can significantly reduce the yield and quality of tomatoes. Using agrochemicals to combat these diseases can lead to chemical residues, pesticide resistance, and environmental pollution. Unfortunately, resistant varieties are not yet available. Therefore, we must find alternative strategies to protect tomatoes from these soil-borne diseases. One of the most promising solutions is harnessing microbial communities that can suppress disease and promote plant growth and immunity. Recent omics technologies and next-generation sequencing advances can help us develop microbiome-based strategies to mitigate tomato soil-borne diseases. This review emphasizes the importance of interdisciplinary approaches to understanding the utilization of beneficial microbiomes to mitigate soil-borne diseases and improve crop productivity.
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Affiliation(s)
- Shweta Meshram
- Department of Plant Pathology, Lovely Professional University, Phagwara 144402, India;
| | - Tika B. Adhikari
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695, USA
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26
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Olabemiwo FA, Hagan A, Cham M, Cohan FM. Two plant-growth-promoting Bacillus species can utilize nanoplastics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:167972. [PMID: 37865243 DOI: 10.1016/j.scitotenv.2023.167972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 10/23/2023]
Abstract
Plastics in agricultural soils pose a potential risk to humans because environmental plastics can enter our foods. Here, we present a first step toward developing bacteria that can both flourish in agricultural settings and bioremediate nanoplastics. We exposed two species known to promote plant growth in agricultural settings, Bacillus inaquosorum and B. velezensis, to polystyrene nanoplastic beads at various dosages. When grown in a medium with a low dosage of plastic as the only carbon source, the bacteria could oxidize the plastic, indicating the possibility of utilizing the plastic in their growth. When plastic was added to a rich medium, low and high dosages brought immediate death or inhibition to about a third of B. inaquosorum cells during 1 h. Despite the immediate harm, over the course of 24 h, the bacteria from one strain each of B. inaquosorum and B. velezensis reached higher densities at low plastic doses than with no plastic, although they reached lower densities at high plastic doses (a toxicological phenomenon known as hormesis). Microscopic studies demonstrated that the bacteria are shielded from excessive accumulation of nanoplastic particles. Because these plant-growth-promoting species can utilize polystyrene nanoplastics, strains of these species might be developed to bioremediate environmental plastic in agricultural settings. SYNOPSIS: Plastic fragments on farmlands accumulate on produce, creating a need for bioremediation. We identify bacteria that can flourish on agricultural land and utilize nanoplastics, a first step toward developing agricultural bioremediators.
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Affiliation(s)
- Fatai A Olabemiwo
- Department of Biology, Wesleyan University, Middletown, CT 06459, United States of America
| | - Ama Hagan
- Department of Biology, Wesleyan University, Middletown, CT 06459, United States of America
| | - Melanie Cham
- Department of Biology, Wesleyan University, Middletown, CT 06459, United States of America
| | - Frederick M Cohan
- Department of Biology, Wesleyan University, Middletown, CT 06459, United States of America.
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Wendisch VF, Brito LF, Passaglia LM. Genome-based analyses to learn from and about Paenibacillus sonchi genomovar Riograndensis SBR5T. Genet Mol Biol 2024; 46:e20230115. [PMID: 38224489 PMCID: PMC10789242 DOI: 10.1590/1678-4685-gmb-2023-0115] [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: 04/21/2023] [Accepted: 11/20/2023] [Indexed: 01/17/2024] Open
Abstract
Paenibacillus sonchi genomovar Riograndensis SBR5T is a plant growth-promoting rhizobacterium (PGPR) isolated in the Brazilian state of Rio Grande do Sul from the rhizosphere of Triticum aestivum. It fixes nitrogen, produces siderophores as well as the phytohormone indole-3-acetic acid, solubilizes phosphate and displays antagonist activity against Listeria monocytogenes and Pectobacterium carotovorum. Comprehensive omics analysis and the development of genetic tools are key to characterizing and engineering such non-model microorganisms. Therefore, the complete genome of SBR5T was sequenced, and shown to encode 6,705 proteins, 87 tRNAs, and 27 rRNAs and it enabled a landscape transcriptome analysis that unveiled conserved transcriptional and translational patterns and characterized operon structures and riboswitches. The pangenome of P. sonchi species is open with a stable core pangenome. At the same time, the analysis of genes coding for nitrogenases revealed that the trait of nitrogen fixation is sparse within the Paenibacillaceae family and the presence of Fe-only nitrogenase in the P. sonchi group was exclusive to SBR5T. The development of genetic tools for SBR5T enabled genetic transformation, plasmid construction for constitutive and inducible gene expression, and gene repression using the CRISPRi system. Altogether, the work with P. sonchi can guide the study of non-model bacteria with economic potential.
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Affiliation(s)
- Volker F. Wendisch
- Bielefeld University, Faculty of Biology, Genetics of Prokaryotes, Bielefeld, Germany
- Bielefeld University, Center for Biotechnology (CeBiTec), Bielefeld, Germany
| | - Luciana F. Brito
- Norwegian University of Science and Technology, Department of Biotechnology and Food Science, Trondheim, Norway
| | - Luciane M.P. Passaglia
- Universidade Federal do Rio Grande do Sul (UFRGS), Programa de Pós-Graduação em Genética e Biologia Molecular, Instituto de Biociências, Departamento de Genética, Porto Alegre, RS, Brazil
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Peng H, Xu T, Wang L, Yu J, Chen X, Cheng X, Li H, Huang L, Wei L, Wei S. Effect of Streptomyces JD211 application on soil physicochemical properties and N 2O emission characteristics of rice rhizosphere. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167673. [PMID: 37813263 DOI: 10.1016/j.scitotenv.2023.167673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/06/2023] [Accepted: 10/06/2023] [Indexed: 10/11/2023]
Abstract
Biocontrol agent, as a pollution-free and sustainable plant disease control method, can inhibit the spread of soil-borne diseases and promote the growth of crops. However, there are few studies on the effect of biocontrol agent on N2O emission in rice soil. In this study, after the application of the biocontrol agent Streptomyces JD211, N2O emission from rice soil were measured, and the relationship between the agent and soil N2O emissions were studied in soil chemistry and molecular biology. The results showed that the application of Streptomyces JD211 can significantly reduce the rate of N2O emission from rice soil. The NH4+-N and NO3--N contents in rice soil decreased in a short period of time after the application of Streptomyces JD211, while the mineral N content in the soil remained stable with rice growth. 16S rRNA gene sequencing and metagenomic sequencing revealed Streptomyces JD211 application mainly increased the relative abundance of Burkholderia and Streptomyces in the soil microbial community, reduced the relative abundance of hao, norB, norC genes, and increased the relative abundance of nosZ and hcp genes. Streptomyces JD211 application promoted N2O transformation and weakened N2O production pathways, which ultimately reduced N2O emissions from rice soils. This study provided new insight of biocontrol agents to regulate soil N2O emissions, which is of great significance for the development and application of biocontrol bacteria and farmland environmental protection.
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Affiliation(s)
- Hailong Peng
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Tianyu Xu
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Lixin Wang
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Jiaqing Yu
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Xin Chen
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Xin Cheng
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Hanguang Li
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Lin Huang
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China
| | - Lei Wei
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China.
| | - Saijin Wei
- College of Biological Science and Engineering, Jiangxi Collaborative Innovation Center of Modernization production of Double-cropping Rice, Jiangxi Provincial Key Lab of Crop Physiology, Ecology and Genetic Breeding, Jiangxi Provincial Engineering Lab for Development and Utilization of Agricultural Microbial resources, Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang, China.
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Nkoh JN, Shi RY, Li JY, Xu RK. Combined application of Pseudomonas fluorescens and urea can mitigate rapid acidification of cropland Ultisol. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 906:167652. [PMID: 37813255 DOI: 10.1016/j.scitotenv.2023.167652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/03/2023] [Accepted: 10/05/2023] [Indexed: 10/11/2023]
Abstract
Rhizobacteria maintain a healthy soil required for crop growth. This has led to increased interest in the use of bacteria-based biofertilizers in agriculture as they improve soil nutrient content and protect plants against pathogens. However, the effect of bacteria inoculum on N transformation and soil physicochemical properties during urea fertilization remains unexploited. Thus, this study investigated the effect of Pseudomonas fluorescens on urea N transformation in an acidic Ultisol within a 70-d incubation period. The results revealed that (1) soil pH peaked on d 5 (pH 5.58) and 20 (pH 6.23) and rapidly decreased till d 62 (pH 4.10) and 50 (pH 4.93) for urea and urea + bacteria treatments, respectively, and remained constant thereafter. After 70 d, the pH of the bacteria-treated Ultisol remained higher (0.78 pH units) than that of urea-treated Ultisol; (2) the change in soil pH was in agreement with the mineralization trend of N, as the concentration of NH4+-N peaked on d 5 (134.2 mg N kg-1) and 20 (423 mg N kg-1) before decreasing to 62.1 and 276.1 mg N kg-1 on d 70 in urea-treated and bacteria-treated Ultisol, respectively; and (3) P. fluorescens consumed protons produced during nitrification to retard rapid decrease in soil pH, decreased soil exchangeable acidity (33.3 %), increased soil effective cation exchange capacity (32.8 %), and increased the solubility of soil exchangeable base cations (68.4 %, Ca2+ + Mg2+ + K+ + Na+). Thus, bacterial inoculum could promote N mineralization, enhance nutrient solubility, and retard soil acidification during N transformation in soils.
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Affiliation(s)
- Jackson Nkoh Nkoh
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China; Shenzhen Key Laboratory of Marine Bioresource and Eco-Environmental Science, Guangdong Provincial Key Laboratory for Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China; Department of Chemistry, University of Buea, P.O. Box 63, Buea, Cameroon.
| | - Ren-Yong Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China.
| | - Jiu-Yu Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China.
| | - Ren-Kou Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China.
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BiBi A, Bibi S, Al-Ghouti MA, Abu-Dieyeh MH. Isolation and evaluation of Qatari soil rhizobacteria for antagonistic potential against phytopathogens and growth promotion in tomato plants. Sci Rep 2023; 13:22050. [PMID: 38086854 PMCID: PMC10716397 DOI: 10.1038/s41598-023-49304-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 12/06/2023] [Indexed: 12/18/2023] Open
Abstract
Plant growth promoting rhizobacteria are a diverse group of microorganisms that enhance the growth of plants under various conditions. In this study, 55 isolates of endogenous rhizobacteria were collected from the rhizosphere of Avicennia marina, Suaeda vermiculata, Salsola soda, Anabasis setifera, Salicornia europaea, Arthrocnemum macrostachyum, Limonium axillare, Tetraena qatarensis, Aeluropus lagopoides, and Prosopis juliflora. The isolates were evaluated in-vitro for their antagonist potential against Fusarium oxysporum and Botrytis cinerea using the dual culture technique, where the maximum growth inhibition reached 49% and 57%, respectively. In-vivo evaluation was accomplished to determine the growth-promoting potential of the rhizobacteria under greenhouse conditions where the strain ANABR3 (Bacillus subtilis) showed the strongest growth-promoting effects. Further in-vivo testing regarding the effectiveness of rhizobacteria in the presence of the phytopathogen was also completed using the Hoagland medium. LEMR3 and SALIR5 (both identified as two strains of B. subtilis) supported the tomato seedlings to overcome the disease and significantly (p ≤ 0.05) increased above and belowground biomass compared to the control. Additionally, several characterizing tests were carried out on the selected strains, these strains were found to possess numerous features that promote plant growth directly and indirectly such as the production of IAA, HCN, hydrolytic enzymes, ACC deaminase, NH3, and some rhizobacteria were capable of phosphate solubilization. In conclusion, this study showed that local rhizobacterial isolates collected from arid lands possess valuable traits, making them promising bio-control agents and bio-fertilizers for agricultural purposes.
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Affiliation(s)
- Amina BiBi
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar
| | - Shazia Bibi
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar
| | - Mohammad A Al-Ghouti
- Environmental Science Program, Department of Biological and Environmental Sciences, College of Arts and Scieances, Qatar University, P.O. Box: 2713, Doha, Qatar
| | - Mohammed H Abu-Dieyeh
- Biological Science Program, Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, P.O. Box: 2713, Doha, Qatar.
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31
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Dolatmoradi M, Stopka SA, Corning C, Stacey G, Vertes A. High-Throughput f-LAESI-IMS-MS for Mapping Biological Nitrogen Fixation One Cell at a Time. Anal Chem 2023; 95:17741-17749. [PMID: 37989253 DOI: 10.1021/acs.analchem.3c03651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2023]
Abstract
For the characterization of the metabolic heterogeneity of cell populations, high-throughput single-cell analysis platforms are needed. In this study, we utilized mass spectrometry (MS) enhanced with ion mobility separation (IMS) and coupled with an automated sampling platform, fiber-based laser ablation electrospray ionization (f-LAESI), for in situ high-throughput single-cell metabolomics in soybean (Glycine max) root nodules. By fully automating the in situ sampling platform, an overall sampling rate of 804 cells/h was achieved for high numbers (>500) of tissue-embedded plant cells. This is an improvement by a factor of 13 compared to the previous f-LAESI-MS configuration. By introducing IMS, the molecular coverage improved, and structural isomers were separated on a millisecond time scale. The enhanced f-LAESI-IMS-MS platform produced 259 sample-related peaks/cell, almost twice as much as the 131 sample-related peaks/cell produced by f-LAESI-MS without IMS. Using the upgraded system, two types of metabolic heterogeneity characterization methods became possible. For unimodal metabolite abundance distributions, the metabolic noise reported on the metabolite level variations within the cell population. For bimodal distributions, the presence of metabolically distinct subpopulations was established. Discovering these latent cellular phenotypes could be linked to the presence of different cell states, e.g., proliferating bacteria in partially occupied plant cells and quiescent bacteroids in fully occupied cells in biological nitrogen fixation, or spatial heterogeneity due to altered local environments.
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Affiliation(s)
- Marjan Dolatmoradi
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
| | - Sylwia A Stopka
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States
| | - Chloe Corning
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
| | - Gary Stacey
- Divisions of Plant Sciences and Biochemistry, Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, Missouri 65211, United States
| | - Akos Vertes
- Department of Chemistry, The George Washington University, Washington, District of Columbia 20052, United States
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Gonçalves OS, Creevey CJ, Santana MF. Designing a synthetic microbial community through genome metabolic modeling to enhance plant-microbe interaction. ENVIRONMENTAL MICROBIOME 2023; 18:81. [PMID: 37974247 PMCID: PMC10655421 DOI: 10.1186/s40793-023-00536-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 10/30/2023] [Indexed: 11/19/2023]
Abstract
BACKGROUND Manipulating the rhizosphere microbial community through beneficial microorganism inoculation has gained interest in improving crop productivity and stress resistance. Synthetic microbial communities, known as SynComs, mimic natural microbial compositions while reducing the number of components. However, achieving this goal requires a comprehensive understanding of natural microbial communities and carefully selecting compatible microorganisms with colonization traits, which still pose challenges. In this study, we employed multi-genome metabolic modeling of 270 previously described metagenome-assembled genomes from Campos rupestres to design a synthetic microbial community to improve the yield of important crop plants. RESULTS We used a targeted approach to select a minimal community (MinCom) encompassing essential compounds for microbial metabolism and compounds relevant to plant interactions. This resulted in a reduction of the initial community size by approximately 4.5-fold. Notably, the MinCom retained crucial genes associated with essential plant growth-promoting traits, such as iron acquisition, exopolysaccharide production, potassium solubilization, nitrogen fixation, GABA production, and IAA-related tryptophan metabolism. Furthermore, our in-silico selection for the SymComs, based on a comprehensive understanding of microbe-microbe-plant interactions, yielded a set of six hub species that displayed notable taxonomic novelty, including members of the Eremiobacterota and Verrucomicrobiota phyla. CONCLUSION Overall, the study contributes to the growing body of research on synthetic microbial communities and their potential to enhance agricultural practices. The insights gained from our in-silico approach and the selection of hub species pave the way for further investigations into the development of tailored microbial communities that can optimize crop productivity and improve stress resilience in agricultural systems.
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Affiliation(s)
- Osiel S Gonçalves
- Grupo de Genômica Eco-evolutiva Microbiana, Laboratório de Genética Molecular de Microrganismos, Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Christopher J Creevey
- School of Biological Sciences, Institute for Global Food Security, Queen's University Belfast, Belfast, BT9 5DL, UK
| | - Mateus F Santana
- Grupo de Genômica Eco-evolutiva Microbiana, Laboratório de Genética Molecular de Microrganismos, Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
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Yang Z, Qiao Y, Konakalla NC, Strøbech E, Harris P, Peschel G, Agler-Rosenbaum M, Weber T, Andreasson E, Ding L. Streptomyces alleviate abiotic stress in plant by producing pteridic acids. Nat Commun 2023; 14:7398. [PMID: 37968347 PMCID: PMC10652019 DOI: 10.1038/s41467-023-43177-3] [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: 11/28/2022] [Accepted: 10/31/2023] [Indexed: 11/17/2023] Open
Abstract
Soil microbiota can confer fitness advantages to plants and increase crop resilience to drought and other abiotic stressors. However, there is little evidence on the mechanisms correlating a microbial trait with plant abiotic stress tolerance. Here, we report that Streptomyces effectively alleviate drought and salinity stress by producing spiroketal polyketide pteridic acid H (1) and its isomer F (2), both of which promote root growth in Arabidopsis at a concentration of 1.3 nM under abiotic stress. Transcriptomics profiles show increased expression of multiple stress responsive genes in Arabidopsis seedlings after pteridic acids treatment. We confirm in vivo a bifunctional biosynthetic gene cluster for pteridic acids and antimicrobial elaiophylin production. We propose it is mainly disseminated by vertical transmission and is geographically distributed in various environments. This discovery reveals a perspective for understanding plant-Streptomyces interactions and provides a promising approach for utilising beneficial Streptomyces and their secondary metabolites in agriculture to mitigate the detrimental effects of climate change.
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Affiliation(s)
- Zhijie Yang
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs, Lyngby, Denmark
| | - Yijun Qiao
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs, Lyngby, Denmark
| | - Naga Charan Konakalla
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, SE-230 53, Alnarp, Sweden
| | - Emil Strøbech
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs, Lyngby, Denmark
| | - Pernille Harris
- Department of Chemistry, Technical University of Denmark, Søltofts Plads, Building 206, 2800 Kgs, Lyngby, Denmark
| | - Gundela Peschel
- Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
| | - Miriam Agler-Rosenbaum
- Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute (HKI), Beutenbergstr. 11a, 07745, Jena, Germany
| | - Tilmann Weber
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kemitorvet, Building 220, 2800 Kgs, Lyngby, Denmark
| | - Erik Andreasson
- Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Sundsvägen 14, SE-230 53, Alnarp, Sweden
| | - Ling Ding
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, 2800 Kgs, Lyngby, Denmark.
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Sangoquiza-Caiza CA, Pincay-Verdezoto AK, Park CH, Zambrano-Mendoza JL. Diversity of nitrogen-fixing and phosphorus-solubilizing bacteria associated with the rhizosphere of Andean maize in Ecuador. BRAZ J BIOL 2023; 83:e273632. [PMID: 37937624 DOI: 10.1590/1519-6984.273632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 09/05/2023] [Indexed: 11/09/2023] Open
Abstract
A great diversity of microorganisms in the soil plays an important role in the sustainability of agricultural production systems. Among these microorganisms are bacteria that have the ability to fix atmospheric nitrogen or mineralize phosphorus, thus making it easily assimilable for plants. Maize is the main crop in the highlands of Ecuador (above 2000 meters) and it is predominantly traditional, using native seeds and very little or no agrochemicals. The National Institute of Agricultural Research (INIAP) has a collection of bacteria collected from the rhizosphere of maize in the highlands of Ecuador that has not been taxonomically identified. This research aimed to carry out a biochemical and genetic characterization to establish the identity of the collected nitrogen-fixing and phosphorus-solubilizing bacteria and to understand better the diversity of microorganisms present in the root biome of Andean maize. The hypothesis consisted of determining if there is a difference in the bacteria associated with the rhizosphere of maize in the Andean region of Ecuador compared with other regions. The bacteria underwent classical biochemical characterization based on catalase, oxidase, urease, sulfates, indole, sulfate-indole motility (SIM), and lactose, among others, and genetic identification by 16S rDNA ribosomal gene sequencing, PCR, and SANGER sequencing. A great diversity of microorganisms associated with the rhizosphere of the crop was found, including the genera Agrobacterium, Bacillus, Stenotrophomonas, Acinetobacter, Brevundimonas, Pseudomonas, and Pseudoxanthomonas. INIAP conserves these bacteria in a bank of microorganisms associated with crops of economic importance. They are useful for the development of biofertilizers that could contribute to a more sustainable agriculture in the region.
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Affiliation(s)
- C A Sangoquiza-Caiza
- Instituto Nacional de Investigaciones Agropecuarias (INIAP), Estación Experimental Santa Catalina (EESC), Programa de Maíz (PM), Cutuglahua, Pichincha, Ecuador
| | - A K Pincay-Verdezoto
- Instituto Nacional de Investigaciones Agropecuarias (INIAP), Estación Experimental Santa Catalina (EESC), Programa de Maíz (PM), Cutuglahua, Pichincha, Ecuador
- Korea Partnership for Innovation of Agriculture (KOPIA),Estación Experimental Santa Catalina (EESC), Cutuglahua, Pichincha, Ecuador
| | - C H Park
- Korea Partnership for Innovation of Agriculture (KOPIA),Estación Experimental Santa Catalina (EESC), Cutuglahua, Pichincha, Ecuador
| | - J L Zambrano-Mendoza
- Instituto Nacional de Investigaciones Agropecuarias (INIAP), Estación Experimental Santa Catalina (EESC), Programa de Maíz (PM), Cutuglahua, Pichincha, Ecuador
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Gonçalves OS, Santana MF. Uncovering the Secrets of Slow-Growing Bacteria in Tropical Savanna Soil Through Isolation and Genomic Analysis. MICROBIAL ECOLOGY 2023; 86:2687-2702. [PMID: 37507488 DOI: 10.1007/s00248-023-02275-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 07/21/2023] [Indexed: 07/30/2023]
Abstract
One gram of soil holds ten billion bacteria of thousands of different species, but most remain unknown, and one of the serious issues is intrinsic to slow-growing bacteria. In this study, we aimed to isolate and characterize slow-growing bacteria from Brazilian Cerrado soil. Over a period of 4 weeks, we conducted an incubation process and selected a total of 92 isolates. These isolates, consisting mostly of slow-growing bacteria, have the ability to thrive in low-water conditions and possess features that promote plant growth. To identify the isolated bacteria, we performed 16S rRNA sequencing analysis and found that the slow-growing strains were genetically similar to known bacterial species but also belonged to a novel group of species. The new strains identified were Caballeronia sp., Neobacillus sp., Bradyrhizobium sp., and high GC Gram-positive species. Furthermore, we conducted growth experiments using various culture media and temperature conditions. These experiments revealed an extended lag phase for five strains, indicating their slow growth characteristics. Genomic analysis of these five slow-growing bacteria showed their potential to participate in biogeochemical cycles, metabolize various carbohydrates, encode proteins with a role in promoting plant growth and have biosynthetic potential for secondary metabolites. Taken together, our findings reveal the untapped potential of slow-growing bacteria in tropical savanna soils.
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Affiliation(s)
- Osiel Silva Gonçalves
- Grupo de Genômica Eco-evolutiva Microbiana, Laboratório de Genética Molecular de Microrganismos, Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária, Universidade Federal de Viçosa, Minas Gerais, Brazil
| | - Mateus Ferreira Santana
- Grupo de Genômica Eco-evolutiva Microbiana, Laboratório de Genética Molecular de Microrganismos, Departamento de Microbiologia, Instituto de Biotecnologia Aplicada à Agropecuária, Universidade Federal de Viçosa, Minas Gerais, Brazil.
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Zheng Q, Hu Y, Kosina SM, Van Goethem MW, Tringe SG, Bowen BP, Northen TR. Conservation of beneficial microbes between the rhizosphere and the cyanosphere. THE NEW PHYTOLOGIST 2023; 240:1246-1258. [PMID: 37668195 DOI: 10.1111/nph.19225] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 07/26/2023] [Indexed: 09/06/2023]
Abstract
Biocrusts are phototroph-driven communities inhabiting arid soil surfaces. Like plants, most photoautotrophs (largely cyanobacteria) in biocrusts are thought to exchange fixed carbon for essential nutrients like nitrogen with cyanosphere bacteria. Here, we aim to compare beneficial interactions in rhizosphere and cyanosphere environments, including finding growth-promoting strains for hosts from both environments. To examine this, we performed a retrospective analysis of 16S rRNA gene sequencing datasets, host-microbe co-culture experiments between biocrust communities/biocrust isolates and a model grass (Brachypodium distachyon) or a dominant biocrust cyanobacterium (Microcoleus vaginatus), and metabolomic analysis. All 18 microbial phyla in the cyanosphere were also present in the rhizosphere, with additional 17 phyla uniquely found in the rhizosphere. The biocrust microbes promoted the growth of the model grass, and three biocrust isolates (Bosea sp._L1B56, Pseudarthrobacter sp._L1D14 and Pseudarthrobacter picheli_L1D33) significantly promoted the growth of both hosts. Moreover, pantothenic acid was produced by Pseudarthrobacter sp._L1D14 when grown on B. distachyon exudates, and supplementation of plant growth medium with this metabolite increased B. distachyon biomass by over 60%. These findings suggest that cyanobacteria and other diverse photoautotrophic hosts can be a source for new plant growth-promoting microbes and metabolites.
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Affiliation(s)
- Qing Zheng
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Yuntao Hu
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Suzanne M Kosina
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Marc W Van Goethem
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Susannah G Tringe
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Joint Genome Institute, Berkeley, CA, 94720, USA
| | - Benjamin P Bowen
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Joint Genome Institute, Berkeley, CA, 94720, USA
| | - Trent R Northen
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Joint Genome Institute, Berkeley, CA, 94720, USA
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Li J, Wang J, Liu H, Macdonald CA, Singh BK. Microbial inoculants with higher capacity to colonize soils improved wheat drought tolerance. Microb Biotechnol 2023; 16:2131-2144. [PMID: 37815273 PMCID: PMC10616649 DOI: 10.1111/1751-7915.14350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/16/2023] [Accepted: 09/20/2023] [Indexed: 10/11/2023] Open
Abstract
Microbial inoculants have gained increasing attention worldwide as an eco-friendly solution for improving agriculture productivity. Several studies have demonstrated their potential benefits, such as enhanced resistance to drought, salinity, and pathogens. However, the beneficial impacts of inoculants remain inconsistent. This variability is attributed to limited knowledge of the mechanisms by which microbial inoculants affect crop growth and a lack of ecological characteristics of these inoculants that limit our ability to predict their beneficial effects. The first important step is believed to be the evaluation of the inoculant's ability to colonize new habitats (soils and plant roots), which could provide crops with beneficial functions and improve the consistency and efficiency of the inoculants. In this study, we aimed to investigate the impact of three microbial inoculants (two bacterial: P1 and P2, and one fungal: P3) on the growth and stress responses of three wheat varieties in two different soil types under drought conditions. Furthermore, we investigated the impact of microbial inoculants on soil microbial communities. Plant biomass and traits were measured, and high-throughput sequencing was used to characterize bulk and rhizosphere soil microbiomes after exposure to drought stress. Under drought conditions, plant shoot weight significantly increased (11.37%) under P1 treatments compared to uninoculated controls. In addition, total nitrogen enzyme activity increased significantly under P1 in sandy soil but not in clay soil. Importantly, network analyses revealed that P1, consisting of Bacillus paralicheniformis and Bacillus subtilis, emerged as the keystone taxa in sandy soil. Conversely, P2 and P3 failed to establish as keystone taxa, which may explain their insignificant impact on wheat performance under drought conditions. In conclusion, our study emphasizes the importance of effective colonization by microbial inoculants in promoting crop growth under drought conditions. Our findings support the development of microbial inoculants that robustly colonize plant roots for improved agricultural productivity.
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Affiliation(s)
- Jiayu Li
- Hawkesbury Institute for the Environment, Western Sydney University, New South Wales, Penrith, Australia
| | - Juntao Wang
- Hawkesbury Institute for the Environment, Western Sydney University, New South Wales, Penrith, Australia
- Global Centre for Land-Based Innovation, Western Sydney University, New South Wales, Penrith, Australia
- School of Science, Western Sydney University, Penrith, New South Wales, Australia
| | - Hongwei Liu
- Hawkesbury Institute for the Environment, Western Sydney University, New South Wales, Penrith, Australia
| | - Catriona A Macdonald
- Hawkesbury Institute for the Environment, Western Sydney University, New South Wales, Penrith, Australia
| | - Brajesh K Singh
- Hawkesbury Institute for the Environment, Western Sydney University, New South Wales, Penrith, Australia
- Global Centre for Land-Based Innovation, Western Sydney University, New South Wales, Penrith, Australia
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Sarkar R, Mukherjee S, Pradhan B, Chatterjee G, Goswami R, Ali MN, Ray SS. Molecular characterization of vermicompost-derived IAA-releasing bacterial isolates and assessment of their impact on the root improvement of banana during primary hardening. World J Microbiol Biotechnol 2023; 39:351. [PMID: 37864056 DOI: 10.1007/s11274-023-03809-8] [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: 05/31/2023] [Accepted: 10/13/2023] [Indexed: 10/22/2023]
Abstract
The hardening step of micropropagation is crucial to make the in vitro raised plants mature and further enhancing their survivability in the external environment. Auxin regulates various root physiological parameters in plant systems. Therefore, the present study aimed to assess the impact of three vermicompost-derived IAA-releasing microbial strains, designated S1, S2, and S3, as biofertilizers on in vitro raised banana plantlets during primary hardening. The High-Performance Thin-Layer Chromatography (HPTLC) analysis of these strains revealed a higher IAA content for S1 and S2 than that of S3 after 144 h of incubation. In total, seven different treatments were applied to banana plantlets, and significant variations were observed in all plant growth parameters for all treatments except autoclaved cocopeat (100%) mixed with autoclaved vermicompost (100%) at a 1:1 ratio. Among these treatments, the application of S3 biofertilizer: autoclaved cocopeat (1:1), followed by S2 biofertlizer: autoclaved cocopeat (1:1), was found to be better than other treatments for root numbers per plant, root length per plant, root volume, and chlorophyll content. These findings have confirmed the beneficial effects of microbial strains on plant systems and propose a link between root improvement and bacterial auxin. Further, these strains were identified at the molecular level as Bacillus sp. As per our knowledge, this is the first report of Bacillus strains isolated from vermicompost and applied as biofertilizer along with cocopeat for the primary hardening of banana. This unique approach may be adopted to improve the quality of plants during hardening, which increases their survival under abiotic stresses.
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Affiliation(s)
- Rajdeep Sarkar
- Division of Agricultural Biotechnology, School of Agriculture and Rural Development, Ramakrishna Mission Vivekananda Educational and Research Institute, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, India
| | - Shibasis Mukherjee
- Division of Agricultural Biotechnology, School of Agriculture and Rural Development, Ramakrishna Mission Vivekananda Educational and Research Institute, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, India
| | - Bhubaneswar Pradhan
- Division of Agricultural Biotechnology, School of Agriculture and Rural Development, Ramakrishna Mission Vivekananda Educational and Research Institute, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, India
| | - Gautam Chatterjee
- Division of Agricultural Biotechnology, School of Agriculture and Rural Development, Ramakrishna Mission Vivekananda Educational and Research Institute, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, India
| | - Rupak Goswami
- Division of Rural Development, School of Agriculture and Rural Development, Ramakrishna Mission Vivekananda Educational and Research Institute, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, India
| | - Md Nasim Ali
- Department of Agricultural Biotechnology, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, India
| | - Syandan Sinha Ray
- Division of Agricultural Biotechnology, School of Agriculture and Rural Development, Ramakrishna Mission Vivekananda Educational and Research Institute, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, India.
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Manetsberger J, Caballero Gómez N, Soria-Rodríguez C, Benomar N, Abriouel H. Simply Versatile: The Use of Peribacillus simplex in Sustainable Agriculture. Microorganisms 2023; 11:2540. [PMID: 37894197 PMCID: PMC10608964 DOI: 10.3390/microorganisms11102540] [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: 09/13/2023] [Revised: 09/30/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Peribacillus simplex is a Gram-positive, spore-forming bacterium derived from a vast range of different origins. Notably, it is part of the plant-growth-promoting rhizobacterial community of many crops. Although members of the Bacillaceae family have been widely used in agriculture, P. simplex has, so far, remained in the shadow of its more famous relatives, e.g., Bacillus subtilis or Bacillus thuringiensis. Recent studies have, however, started to uncover the bacterium's highly promising and versatile properties, in particular in agricultural and environmental applications. Hence, here, we review the plant-growth-promoting features of P. simplex, as well as its biocontrol activity against a variety of detrimental plant pests in different crops. We further highlight the bacterium's potential as a bioremediation agent for environmental contaminants, such as metals, pesticide residues, or (crude) oil. Finally, we examine the recent developments in the European regulatory landscape to facilitate the use of microorganisms in plant protection products. Undoubtedly, further studies on P. simplex will reveal additional benefits for agricultural and environmentally friendly applications.
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Affiliation(s)
- Julia Manetsberger
- Area of Microbiology, Department of Health Sciences, Faculty of Experimental Sciences, University of Jaén, 23071 Jaén, Spain
| | - Natacha Caballero Gómez
- Area of Microbiology, Department of Health Sciences, Faculty of Experimental Sciences, University of Jaén, 23071 Jaén, Spain
| | - Carlos Soria-Rodríguez
- Area of Public International Law and International Relations, Department of Public and European Common Law, University of Jaén, 23071 Jaén, Spain
| | - Nabil Benomar
- Area of Microbiology, Department of Health Sciences, Faculty of Experimental Sciences, University of Jaén, 23071 Jaén, Spain
| | - Hikmate Abriouel
- Area of Microbiology, Department of Health Sciences, Faculty of Experimental Sciences, University of Jaén, 23071 Jaén, Spain
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Melini F, Melini V, Luziatelli F, Abou Jaoudé R, Ficca AG, Ruzzi M. Effect of microbial plant biostimulants on fruit and vegetable quality: current research lines and future perspectives. FRONTIERS IN PLANT SCIENCE 2023; 14:1251544. [PMID: 37900743 PMCID: PMC10602749 DOI: 10.3389/fpls.2023.1251544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Accepted: 09/25/2023] [Indexed: 10/31/2023]
Abstract
Fruit and vegetables hold a prominent place in dietary guidance worldwide and, following the increasing awareness of the importance of their consumption for health, their demand has been on the rise. Fruit and vegetable production needs to be reconsidered so that it can be productive and, meantime, sustainable, resilient, and can deliver healthy and nutritious diets. Microbial plant biostimulants (PBs) are a possible approach to pursuing global food security and agricultural sustainability, and their application emerged as a promising alternative or substitute to the use of agrochemicals (e.g., more efficient use of mineral and organic fertilizers or less demand and more efficient use of pesticides in integrated production systems) and as a new frontier of investigation. To the best of our knowledge, no comprehensive reviews are currently available on the effects that microbial plant biostimulants' application can have specifically on each horticultural crop. This study thus aimed to provide a state-of-the-art overview of the effects that PBs can have on the morpho-anatomical, biochemical, physiological, and functional traits of the most studied crops. It emerged that most experiments occurred under greenhouse conditions; only a few field trials were carried out. Tomato, lettuce, and basil crops have been primarily treated with Arbuscular Mycorrhizal Fungi (AMF), while plant grow-promoting rhizobacteria (PGPR) metabolites were used for crops, such as strawberries and cucumbers. The literature review also pointed out that crop response to PBs is never univocal. Complex mechanisms related to the PB type, the strain, and the crop botanical family, occur.
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Affiliation(s)
- Francesca Melini
- CREA Research Centre for Food and Nutrition, Council for Agricultural Research and Economics, Rome, Italy
| | - Valentina Melini
- CREA Research Centre for Food and Nutrition, Council for Agricultural Research and Economics, Rome, Italy
| | - Francesca Luziatelli
- Department for Innovation in Biological, Agrofood and Forest Systems (DIBAF), University of Tuscia, Viterbo, Italy
| | - Renée Abou Jaoudé
- Department for Innovation in Biological, Agrofood and Forest Systems (DIBAF), University of Tuscia, Viterbo, Italy
| | - Anna Grazia Ficca
- Department for Innovation in Biological, Agrofood and Forest Systems (DIBAF), University of Tuscia, Viterbo, Italy
| | - Maurizio Ruzzi
- Department for Innovation in Biological, Agrofood and Forest Systems (DIBAF), University of Tuscia, Viterbo, Italy
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Arias RM, Heredia Abarca G, del Carmen Perea Rojas Y, de la Cruz Elizondo Y, García Guzman KY. Selection and Characterization of Phosphate-Solubilizing Fungi and Their Effects on Coffee Plantations. PLANTS (BASEL, SWITZERLAND) 2023; 12:3395. [PMID: 37836135 PMCID: PMC10574286 DOI: 10.3390/plants12193395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/14/2023] [Accepted: 09/20/2023] [Indexed: 10/15/2023]
Abstract
The use of phosphate-solubilizing fungi in coffee cultivation is an alternative to the use of traditional fertilizers. The objective of this study was to analyze the mechanisms involved in the phosphorus solubilization of fungal strains and to evaluate the effect of a phosphate-solubilizing strain on coffee plants. For this, phosphorus-solubilizing fungal strains were selected for evaluation of their solubilization potential and phosphatase activity. Coffee plants were inoculated in the field with a phosphate-solubilizing strain, and the soil and foliar soluble phosphorus contents, as well as coffee bean yield, were quantified. Of the 151 strains analyzed, Sagenomella diversispora, Penicillium waksmanii, and Penicillium brevicompactum showed the highest solubilization. Aspergillus niger and P. waksmanii presented the highest soluble phosphorus values; however, P. brevicompactum showed the highest phosphatase activity. The P. brevicompactum strain inoculated on the coffee plants did not favor the foliar phosphorus content but increased the soil soluble phosphorus content in two of the coffee plantations. The plants inoculated with the phosphate-solubilizing strain showed an increase in coffee bean weight on all plantations, although this increase was only significant in two of the three selected coffee plantations.
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Affiliation(s)
- Rosa María Arias
- Instituto de Ecología A. C., Carretera Antigua a Coatepec, No. 351. Col. El Haya, Xalapa 91070, Veracruz, Mexico;
| | - Gabriela Heredia Abarca
- Instituto de Ecología A. C., Carretera Antigua a Coatepec, No. 351. Col. El Haya, Xalapa 91070, Veracruz, Mexico;
| | - Yamel del Carmen Perea Rojas
- Centro de Investigación en Micologia Aplicada, Universidad Veracruzana Médicos No. 5, U.H. del Bosque, Xalapa-Enríquez 91017, Veracruz, Mexico;
| | - Yadeneyro de la Cruz Elizondo
- Facultad de Biología, Universidad Veracruzana, Campus Xalapa, Circuito Gonzalo Aguirre Beltrán s/n. CP Zona Universitaria, Xalapa 91090, Mexico;
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Xiao Y, Chen R, Chen L, Yang B, Jiang L, Fang J. Endophytic Fungus Talaromyces sp. MR1 Promotes the Growth and Cadmium Uptake of Arabidopsis thaliana L. Under Cadmium Stress. Curr Microbiol 2023; 80:346. [PMID: 37733094 DOI: 10.1007/s00284-023-03453-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 08/21/2023] [Indexed: 09/22/2023]
Abstract
Endophytes play essential roles in plant growth under metal(loid)s stress. An endophytic fungus strain MR1 was isolated from the roots of Miscanthus floridulus collected from a lead-zinc mining area (Huayuan, China), which could produce indole-3-acetic acid and have Cadmium (Cd) tolerance. Further 18S rRNA sequencing analysis showed that it was highly similar (99.83%) to Talaromyces pinophilus. In pot experiments, we explored the effects of strain MR1 on the growth and Cd uptake of a wide-type Arabidopsis thaliana under low (LC) and high (HC) Cd concentrations. The results showed that MR1 effectively increased the dry weight of aboveground and underground tissues by 25.95-107.21% in both LC and HC groups. Due to MR1 inoculation, the Cd content in the underground tissues was significantly (p < 0.05) decreased by 39.28% under low Cd concentration, while it was significantly (p < 0.05) increased by 28.28% under high Cd concentration. Besides, MR1 inoculations significantly (p < 0.05) increased the total content of removed Cd (17.080 μg) and BCF (0.064) by 129.77% and 153.95% under high Cd concentration. Therefore, we speculated that MR1 might be selected as the effective microbial agent to increase crop yield and control Cd content in the crop in light Cd-contaminated soil. Besides, MR1 could potentially enhance the phytoremediation efficiency of extremely Cd-contaminated soil.
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Affiliation(s)
- Yunhua Xiao
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
- Hunan Engineering Laboratory for Pollution Control and Waste, Utilization in Swine Production, Changsha, 410128, China
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, China
| | - Rui Chen
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Liang Chen
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
| | - Bo Yang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China
- Hunan Engineering Laboratory for Pollution Control and Waste, Utilization in Swine Production, Changsha, 410128, China
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, China
| | - Lihong Jiang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China.
- Hunan Engineering Laboratory for Pollution Control and Waste, Utilization in Swine Production, Changsha, 410128, China.
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, China.
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China.
- Hunan Engineering Laboratory for Pollution Control and Waste, Utilization in Swine Production, Changsha, 410128, China.
- Key Laboratory for Rural Ecosystem Health in Dongting Lake Area of Hunan Province, Changsha, 410128, China.
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Nekoval SN, Churikova AK, Chernyakovich MN, Pridannikov MV. Primary Screening of Microorganisms against Meloidogyne hapla (Chitwood, 1949) under the Conditions of Laboratory and Vegetative Tests on Tomato. PLANTS (BASEL, SWITZERLAND) 2023; 12:3323. [PMID: 37765486 PMCID: PMC10536559 DOI: 10.3390/plants12183323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 09/29/2023]
Abstract
Highly adapted obligate endoparasites of the root system, root-knot nematodes (Meloidogyne spp.), cause great damage to agricultural crops. Our research is aimed at the assessment of nematicidal activity and effectiveness of antagonist fungal and bacterial strains against the most common type of root-knot nematode in the south of Russia. By means of molecular genetic identification, it was found that in the south of Russia, the species Meloidogyne hapla Chitwood, 1949 and Meloidogyne incognita (Kofoid and White, 1919) Chitwood, 1949 cause galls on the roots of open-ground and greenhouse tomato. Screening of microbial agents against second-stage juvenile (J2) M. hapla was carried out in the laboratory. At the end of the experiment, two liquid fungal cultures of Paecilomyces lilacinus BK-6 and Metarhizium anisopliae BK-2 were isolated, the nematicidal activity of which reached 100.0 and 70.2%, and exceeded the values of the biological standard (Nemotafagin-Mikopro) by 38.4% and 8.8%. The highest biological efficacy was noted in the liquid cultures of P. lilacinus BK-6, M. anisopliae BK-2, and Arthrobotrys conoides BK-8 when introduced into the soil before planting tomato. The number of formed galls on the roots was lower in comparison with the control by 81.0%, 75.5%, and 74.4%.
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Affiliation(s)
- Svetlana N. Nekoval
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.K.C.); (M.N.C.)
| | - Arina K. Churikova
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.K.C.); (M.N.C.)
| | - Maxim N. Chernyakovich
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.K.C.); (M.N.C.)
| | - Mikhail V. Pridannikov
- Center of Parasitology “A.N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences”, 33 Leninsky Prospekt, 119071 Moscow, Russia;
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Wang L, Tang X, Liu X, Zhang J. Active permanent greening - a new slope greening technology based on mineral solubilizing microorganisms. FRONTIERS IN PLANT SCIENCE 2023; 14:1219139. [PMID: 37711299 PMCID: PMC10498118 DOI: 10.3389/fpls.2023.1219139] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 08/08/2023] [Indexed: 09/16/2023]
Abstract
Introduction With social and economic development and the associated large-scale exploitation of natural resources, the number of slopes has significantly increased. As slope instability can lead to serious geological disasters, the ecological protection and reconstruction of slopes has become a hot topic of common global concern. Methods In order to achieve scientific slope management and overcome the difficulty of maintaining slope greening in the long term, this study explored eight strategies (A, B, C, AB, AC, BC, ABC, CK), involving different patented mineral solubilizing microorganisms (MSMs), and analyzed the field application of active permanent greening (APG) based on MSMs. Results The results revealed that MSMs significantly increased the content of effective metal ions and available nutrients in soil and enhanced soil enzyme activity. Among all strategies, strategy A showed significant superiority, with soil effective calcium, magnesium, potassium, nitrogen, phosphorus and organic matter contents increasing by 51.62%, 55.41%, 30.42%, 39.77%, 181.69% and 76.92%, respectively, while urease, sucrase and peroxidase activities increased by 89.59%, 74.68% and 85.30%. MSMs strongly promoted the growth of Amorpha. Strategy A showed the best performance, with plant seedling height, ground diameter, leaf area, root length, and root volume increasing by 95.75%, 47.78%, 124.14%, 108.83%, and 139. 86%, respectively. According to a comprehensive evaluation using the entropy-analysis hierarchy process, strategy A has great potential for application. The field test results verified that APG has significantly better greening performance than the traditional greening method, with high vegetation cover and stable soil layer. Discussion The results of this study provide a reliable practical basis and technical reference for the development, promotion, and application of APG.
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Affiliation(s)
- Lingjian Wang
- Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Xinggang Tang
- Jiangxi Institute of Land Space Survey and Planning, Nanchang, Jiangxi, China
- Technology Innovation Center for Land Spatial Eco-protection and Restoration in Great Lakes Basin, MNR, Nanchang, Jiangxi, China
| | - Xin Liu
- Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration, Nanjing Forestry University, Nanjing, Jiangsu, China
| | - Jinchi Zhang
- Jiangsu Province Key Laboratory of Soil and Water Conservation and Ecological Restoration, Nanjing Forestry University, Nanjing, Jiangsu, China
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Mishra SK, Misra S, Dixit VK, Kar S, Chauhan PS. Ochrobactrum sp. NBRISH6 Inoculation Enhances Zea mays Productivity, Mitigating Soil Alkalinity and Plant Immune Response. Curr Microbiol 2023; 80:328. [PMID: 37620623 DOI: 10.1007/s00284-023-03441-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 08/05/2023] [Indexed: 08/26/2023]
Abstract
Intensifying sodic land characterized by high alkaline pH is an incipient environmental hazard-limiting agricultural potential. In this study, we investigated the effects of plant growth-promoting bacteria Ochrobactrum sp. strain NBRISH6 on the growth and physiology of maize (Zea mays L.) grown under alkaline stress at two soil pH levels. Additionally, we also studied the effects of NBRISH6 on soil fertility parameters. A greenhouse experiment was designed using two live soils (pH 8.2 and 10.2) in earthen pots using maize as a host. Results revealed a significant increase in plant growth and a decrease in defense enzymes in both soil types due to NBRISH6 inoculation as compared to non-treated control. Furthermore, activities of all soil enzymes along with bacterial diversity increased in NBRISH6 treatment under normal as well as stressed conditions. In addition, field evaluation of NBRISH6 inoculation using maize was carried out under normal and alkaline conditions, which resulted in significant enhancement of all vegetative parameters as compared to respective controls. Therefore, the study suggested that Ochrobactrum sp. NBRISH6 can be used to develop a bioinoculant formulation to ameliorate abiotic stresses and enhanced crop productivity.
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Affiliation(s)
- Shashank Kumar Mishra
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India
| | - Sankalp Misra
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India
- Faculty of Biosciences, Institute of Biosciences and Technology, Shri Ramswaroop Memorial University, Uttar Pradesh, Lucknow-Deva Road, Barabanki, 225003, India
| | - Vijay Kant Dixit
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India
| | - Srishti Kar
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India
| | - Puneet Singh Chauhan
- Microbial Technologies Division, Council of Scientific and Industrial Research-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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Asghar I, Ahmed M, Farooq MA, Ishtiaq M, Arshad M, Akram M, Umair A, Alrefaei AF, Jat Baloch MY, Naeem A. Characterizing indigenous plant growth promoting bacteria and their synergistic effects with organic and chemical fertilizers on wheat ( Triticum aestivum). FRONTIERS IN PLANT SCIENCE 2023; 14:1232271. [PMID: 37727857 PMCID: PMC10505817 DOI: 10.3389/fpls.2023.1232271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 07/24/2023] [Indexed: 09/21/2023]
Abstract
The excessive use of chemical fertilizers is deteriorating both the environment and soil, making it a big challenge faced by sustainable agriculture. To assist the efforts for the solution of this burning issue, nine different potential native strains of plant growth-promoting bacteria (PGPB) namely, SA-1(Bacillus subtilis), SA-5 (Stenotrophomonas humi),SA-7(Azospirillum brasilense), BH-1(Azospirillum oryzae), BH-7(Azotobacter armeniacus), BH-8(Rhizobium pusense), BA-3(Azospirillum zeae), BA-6(Rhizobium pusense), and BA-7(Pseudomonas fragi) were isolated that were characterized morphologically, biochemically and molecularly on the basis of 16S rRNA sequencing. Furthermore, the capability of indigenous PGPB in wheat (Triticum aestivum, Chakwal-50) under control, DAP+FYM, SA-1,5,7, BH-1,7,8, BA-3,6,7, DAP+ FYM + SA-1,5,7, DAP+FYM+ BH-1,7,8 and DAP+FYM+ BA-3,6,7 treatments was assessed in a randomized complete block design (RCBD). The results of the study showed that there was a significant increase in plant growth, nutrients, quality parameters, crop yield, and soil nutrients at three depths under SA-1,5,7, BH-1,7,8, and BA-3,6,7 in combination with DAP+FYM. Out of all these treatments, DAP+ FYM + BA-3,6,7 was found to be the most efficient for wheat growth having the highest 1000-grain weight of 55.1 g. The highest values for plant height, no. of grains/spike, spike length, shoot length, root length, shoot dry weight, root dry weight, 1000 grain weight, biological yield, and economic yield were found to be 90.7 cm, 87.7 cm, 7.20 cm, 53.5 cm, 33.5 cm, 4.87 g, 1.32 g, 55.1 g, 8209 kg/h, and 4572 kg/h, respectively, in the DAP+FYM+BA treatment. The DAP+FYM+BA treatment had the highest values of TN (1.68 µg/mL), P (0.38%), and K (1.33%). Likewise, the value of mean protein (10.5%), carbohydrate (75%), lipid (2.5%), and available P (4.68 ppm) was also highest in the DAP+FYM+BA combination. C:P was found to be significantly highest (20.7) in BA alone but was significantly lowest (11.9) in DAP+FYM+BA. Hence, the integration of strains BA-3, BA-5, and BA-7 in fertilizers can be regarded as the most suitable choice for agricultural growth in the sub-mountainous lower region of AJK. This could serve as the best choice for sustainable wheat growth and improved soil fertility with lesser impacts on the environment.
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Affiliation(s)
- Israr Asghar
- Department of Biotechnology, Mirpur University of Science and Technology (MUST), Mirpur, Pakistan
| | - Maqsood Ahmed
- Department of Biotechnology, Mirpur University of Science and Technology (MUST), Mirpur, Pakistan
| | - Muhammad Ansar Farooq
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Muhammad Ishtiaq
- Department of Botany, Mirpur University of Science and Technology (MUST), Bhimber, Pakistan
| | - Muhammad Arshad
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan
| | - Muhammad Akram
- Department of Environmental Sciences, COMSATS University Islamabad (CUI), Vehari, Pakistan
| | - Adnan Umair
- Department of Agriculture, Research wing, Soil and Water Testing Laboratory, Sialkot, Pakistan
| | | | | | - Aamna Naeem
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology (NUST), Islamabad, Pakistan
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Derikvand F, Bazgir E, El Jarroudi M, Darvishnia M, Mirzaei Najafgholi H, Laasli SE, Lahlali R. Unleashing the Potential of Bacterial Isolates from Apple Tree Rhizosphere for Biocontrol of Monilinia laxa: A Promising Approach for Combatting Brown Rot Disease. J Fungi (Basel) 2023; 9:828. [PMID: 37623599 PMCID: PMC10455449 DOI: 10.3390/jof9080828] [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: 07/10/2023] [Revised: 07/27/2023] [Accepted: 08/03/2023] [Indexed: 08/26/2023] Open
Abstract
Monilinia laxa, a notorious fungal pathogen responsible for the devastating brown rot disease afflicting apples, wreaks havoc in both orchards and storage facilities, precipitating substantial economic losses. Currently, chemical methods represent the primary means of controlling this pathogen in warehouses. However, this study sought to explore an alternative approach by harnessing the biocontrol potential of bacterial isolates against brown rot in apple trees. A total of 72 bacterial isolates were successfully obtained from the apple tree rhizosphere and subjected to initial screening via co-cultivation with the pathogen. Notably, eight bacterial isolates demonstrated remarkable efficacy, reducing the mycelial growth of the pathogen from 68.75 to 9.25%. These isolates were subsequently characterized based on phenotypic traits, biochemical properties, and 16S rRNA gene amplification. Furthermore, we investigated these isolates' production capacity with respect to two enzymes, namely, protease and chitinase, and evaluated their efficacy in disease control. Through phenotypic, biochemical, and 16S rRNA gene-sequencing analyses, the bacterial isolates were identified as Serratia marcescens, Bacillus cereus, Bacillus sp., Staphylococcus succinus, and Pseudomonas baetica. In dual culture assays incorporating M. laxa, S. marcescens and S. succinus exhibited the most potent degree of mycelial growth inhibition, achieving 68.75 and 9.25% reductions, respectively. All the bacterial isolates displayed significant chitinase and protease activities. Quantitative assessment of chitinase activity revealed the highest levels in strains AP5 and AP13, with values of 1.47 and 1.36 U/mL, respectively. Similarly, AP13 and AP6 exhibited the highest protease activity, with maximal enzyme production levels reaching 1.3 and 1.2 U/mL, respectively. In apple disease control assays, S. marcescens and S. succinus strains exhibited disease severity values of 12.34% and 61.66% (DS), respectively, highlighting their contrasting efficacy in mitigating disease infecting apple fruits. These findings underscore the immense potential of the selected bacterial strains with regard to serving as biocontrol agents for combatting brown rot disease in apple trees, thus paving the way for sustainable and eco-friendly alternatives to chemical interventions.
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Affiliation(s)
- Fatemeh Derikvand
- Plant Pathology, Faculty of Agriculture, Lorestan University, Lorestan, Khorramabad 68151-44316, Iran; (F.D.); (M.D.); (H.M.N.)
| | - Eidi Bazgir
- Plant Pathology, Faculty of Agriculture, Lorestan University, Lorestan, Khorramabad 68151-44316, Iran; (F.D.); (M.D.); (H.M.N.)
| | - Moussa El Jarroudi
- Water, Environment and Development Unit, Department of Environmental Sciences and Management, UR SPHERES Research Unit, University of Liège, 6700 Arlon, Belgium;
| | - Mostafa Darvishnia
- Plant Pathology, Faculty of Agriculture, Lorestan University, Lorestan, Khorramabad 68151-44316, Iran; (F.D.); (M.D.); (H.M.N.)
| | - Hossein Mirzaei Najafgholi
- Plant Pathology, Faculty of Agriculture, Lorestan University, Lorestan, Khorramabad 68151-44316, Iran; (F.D.); (M.D.); (H.M.N.)
| | - Salah-Eddine Laasli
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknès 50001, Morocco;
| | - Rachid Lahlali
- Phytopathology Unit, Department of Plant Protection, Ecole Nationale d’Agriculture de Meknès, Km10, Rte Haj Kaddour, BP S/40, Meknès 50001, Morocco;
- Plant Pathology Laboratory, AgroBioSciences, College of Sustainable Agriculture and Environmental Sciences, Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, Ben Guerir 43150, Morocco
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Wei T, Gao H, An F, Ma X, Hua L, Guo J. Performance of heavy metal-immobilizing bacteria combined with biochar on remediation of cadmium and lead co-contaminated soil. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:6009-6026. [PMID: 37204552 DOI: 10.1007/s10653-023-01605-9] [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: 02/07/2023] [Accepted: 05/02/2023] [Indexed: 05/20/2023]
Abstract
Heavy metal pollution of soil has become a public concern worldwide since it threats food safety and human health. Sustainable and environmental-friendly remediation technology is urgently needed. Therefore, we investigated the properties and heavy metal removal ability of Enterobacter asburiae G3 (G3), Enterobacter tabaci I12 (I12), and explored the feasibility of remediation Cd, Pb co-contaminated soil by the combination of G3/I12 and biochar. Our results indicated that both strains are highly resistant to Cd, Pb and maintain plant growth-promoting properties. The removal efficiency of G3 for Cd and Pb were 76.79-99.43%, respectively, while the removal efficiency of I12 for Cd and Pb were 62.57-99.55%, respectively. SEM-EDS and XRD analysis revealed that the morphological and structural changes occurred upon heavy metal exposure, metal precipitates were also detected on cell surface. FTIR analysis indicated that functional groups (-OH, -N-H, -C = O, -C-N, -PO4) were involved in Cd/Pb immobilization. Application of the bacteria, biochar, or their combination decreased the acid-extractable Cd, Pb in soil while increased the residual fractions, meanwhile, the bioavailability of both metal elements declined. Besides, these treatments increased soil enzyme (sucrase, catalase and urease) activity and accelerated pakchoi growth, heavy metal accumulation in pakchoi was depressed upon bacteria and/or biochar application, and a synergistic effect was detected when applying bacteria and biochar together. In BC + G3 and BC + I12 treated plants, the Cd and Pb accumulation decreased by 24.42% and 52.19%, 17.55% and 47.36%, respectively. Overall, our study provides an eco-friendly and promising in situ technology that could be applied in heavy metal remediation.
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Affiliation(s)
- Ting Wei
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, People's Republic of China
| | - Han Gao
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, People's Republic of China
| | - Fengqiu An
- College of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, Shaanxi, China
| | - Xiulian Ma
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, People's Republic of China
| | - Li Hua
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, People's Republic of China
| | - Junkang Guo
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, People's Republic of China.
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Green T. A biochemical analysis of Black Soldier fly (Hermetia illucens) larval frass plant growth promoting activity. PLoS One 2023; 18:e0288913. [PMID: 37467228 DOI: 10.1371/journal.pone.0288913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 07/07/2023] [Indexed: 07/21/2023] Open
Abstract
Black Soldier fly (Hermetia illucens) larval (BSFL) frass was examined for its nutrient nitrogen, phosphate and potassium (N:P205:K2O), phytohormone and biogenic amine content, its plant growth promoting activity, and screened to test the hypothesis that bacteria characteristic of the genus Enterococcus (present in the biome of decaying catering waste and the larval gut) are excreted by BSFL in their frass. Frass plant growth promoting activity was measured by comparing the growth of winter wheat berry (Triticum aestivum) in frass treated soil to that of untreated (control) soil. The N:P205:K2O percent dry matter average, biogenic amine and phytohormone content of frass was determined by standard soil analysis, HPLC and HPLC/GC-MS methodologies, respectively. All were at too low of concentrations to account for its plant growth promoting activity. Frass added to soil induced a 11% increase in aerial mass and shoot length in treated plants over controls. Numerous colonies of Enterococci growing out on BEA (bile-esculin-agar) plates were detected in frass collected directly from larvae confirming the hypothesis that viable Enteroccoci are passing from the larval gut into their frass. Since a number of rhizobacteria, including Enterococci, have previously been identified as part of the larval gut biome, the passage of Enterococci from the larval gut into frass in the face of only trace N:P205:K2O percent dry matter averages, biogenic amine and phytohormone content is consistent with the hypothesis that Enterococci exhibiting rhizobacterial activity have a role in conferring to frass its plant growth promoting activity.
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Chaganti C, Phule AS, Chandran LP, Sonth B, Kavuru VPB, Govindannagari R, Sundaram RM. Silicate solubilizing and plant growth promoting bacteria interact with biogenic silica to impart heat stress tolerance in rice by modulating physiology and gene expression. Front Microbiol 2023; 14:1168415. [PMID: 37520375 PMCID: PMC10374332 DOI: 10.3389/fmicb.2023.1168415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/22/2023] [Indexed: 08/01/2023] Open
Abstract
Heat stress caused due to increasing warming climate has become a severe threat to global food production including rice. Silicon plays a major role in improving growth and productivity of rice by aiding in alleviating heat stress in rice. Soil silicon is only sparingly available to the crops can be made available by silicate solubilizing and plant-growth-promoting bacteria that possess the capacity to solubilize insoluble silicates can increase the availability of soluble silicates in the soil. In addition, plant growth promoting bacteria are known to enhance the tolerance to abiotic stresses of plants, by affecting the biochemical and physiological characteristics of plants. The present study is intended to understand the role of beneficial bacteria viz. Rhizobium sp. IIRR N1 a silicate solublizer and Gluconacetobacter diazotrophicus, a plant growth promoting bacteria and their interaction with insoluble silicate sources on morpho-physiological and molecular attributes of rice (Oryza sativa L.) seedlings after exposure to heat stress in a controlled hydroponic system. Joint inoculation of silicates and both the bacteria increased silicon content in rice tissue, root and shoot biomass, significantly increased the antioxidant enzyme activities (viz. superoxidase dismutase, catalase and ascorbate peroxidase) compared to other treatments with sole application of either silicon or bacteria. The physiological traits (viz. chlorophyll content, relative water content) were also found to be significantly enhanced in presence of silicates and both the bacteria after exposure to heat stress conditions. Expression profiling of shoot and root tissues of rice seedlings revealed that seedlings grown in the presence of silicates and both the bacteria exhibited higher expression of heat shock proteins (HSPs viz., OsHsp90, OsHsp100 and 60 kDa chaperonin), hormone-related genes (OsIAA6) and silicon transporters (OsLsi1 and OsLsi2) as compared to seedlings treated with either silicates or with the bacteria alone. The results thus reveal the interactive effect of combined application of silicates along with bacteria Rhizobium sp. IIRR N1, G. diazotrophicus inoculation not only led to augmented silicon uptake by rice seedlings but also influenced the plant biomass and elicited higher expression of HSPs, hormone-related and silicon transporter genes leading to improved tolerance of seedling to heat stress.
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