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Goforth M, Obergh V, Park R, Porchas M, Crosby KM, Jifon JL, Ravishankar S, Brierley P, Leskovar DL, Turini TA, Schultheis J, Coolong T, Miller R, Koiwa H, Patil BS, Cooper MA, Huynh S, Parker CT, Guan W, Cooper KK. Bacterial diversity and composition on the rinds of specific melon cultivars and hybrids from across different growing regions in the United States. PLoS One 2024; 19:e0293861. [PMID: 38603714 PMCID: PMC11008840 DOI: 10.1371/journal.pone.0293861] [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: 10/20/2023] [Accepted: 02/03/2024] [Indexed: 04/13/2024] Open
Abstract
The goal of this study was to characterize the bacterial diversity on different melon varieties grown in different regions of the US, and determine the influence that region, rind netting, and variety of melon has on the composition of the melon microbiome. Assessing the bacterial diversity of the microbiome on the melon rind can identify antagonistic and protagonistic bacteria for foodborne pathogens and spoilage organisms to improve melon safety, prolong shelf-life, and/or improve overall plant health. Bacterial community composition of melons (n = 603) grown in seven locations over a four-year period were used for 16S rRNA gene amplicon sequencing and analysis to identify bacterial diversity and constituents. Statistically significant differences in alpha diversity based on the rind netting and growing region (p < 0.01) were found among the melon samples. Principal Coordinate Analysis based on the Bray-Curtis dissimilarity distance matrix found that the melon bacterial communities clustered more by region rather than melon variety (R2 value: 0.09 & R2 value: 0.02 respectively). Taxonomic profiling among the growing regions found Enterobacteriaceae, Bacillaceae, Microbacteriaceae, and Pseudomonadaceae present on the different melon rinds at an abundance of ≥ 0.1%, but no specific core microbiome was found for netted melons. However, a core of Pseudomonadaceae, Bacillaceae, and Exiguobacteraceae were found for non-netted melons. The results of this study indicate that bacterial diversity is driven more by the region that the melons were grown in compared to rind netting or melon type. Establishing the foundation for regional differences could improve melon safety, shelf-life, and quality as well as the consumers' health.
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Affiliation(s)
- Madison Goforth
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, AZ, United States of America
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
| | - Victoria Obergh
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, AZ, United States of America
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
| | - Richard Park
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, AZ, United States of America
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
| | - Martin Porchas
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Yuma Center of Excellence for Desert Agriculture, University of Arizona, Yuma, AZ, United States of America
| | - Kevin M. Crosby
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Vegetable & Fruit Improvement Center, Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States of America
| | - John L. Jifon
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Vegetable & Fruit Improvement Center, Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States of America
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States of America
| | - Sadhana Ravishankar
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, AZ, United States of America
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
| | - Paul Brierley
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Yuma Center of Excellence for Desert Agriculture, University of Arizona, Yuma, AZ, United States of America
| | - Daniel L. Leskovar
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Vegetable & Fruit Improvement Center, Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States of America
- Texas A&M AgriLife Research and Extension Center, Texas A&M System, Uvalde, TX, United States of America
| | - Thomas A. Turini
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- University of California Cooperative Extension, Fresno, CA, United States of America
| | - Jonathan Schultheis
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Department of Horticultural Sciences, North Carolina State University, Raleigh, NC, United States of America
| | - Timothy Coolong
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Department of Horticulture, University of Georgia, Athens, GA, United States of America
| | - Rhonda Miller
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Department of Animal Science, Texas A&M University, College Station, TX, United States of America
| | - Hisashi Koiwa
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Vegetable & Fruit Improvement Center, Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States of America
| | - Bhimanagouda S. Patil
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Vegetable & Fruit Improvement Center, Department of Horticultural Sciences, Texas A&M University, College Station, TX, United States of America
| | - Margarethe A. Cooper
- School of Animal and Comparative Biomedical Sciences, University of Arizona, Tucson, AZ, United States of America
| | - Steven Huynh
- Produce Safety and Microbiology, Agricultural Research Service, USDA, Albany, CA, United States of America
| | - Craig T. Parker
- Produce Safety and Microbiology, Agricultural Research Service, USDA, Albany, CA, United States of America
| | - Wenjing Guan
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Texas A&M AgriLife Research and Extension Center, Weslaco, TX, United States of America
- Southwest Purdue Agricultural Center, Vincennes, IN, United States of America
| | - Kerry K. Cooper
- USDA National Center of Excellence for Melon at the Vegetable and Fruit Improvement Center of Texas A&M University, College Station, TX, United States of America
- Yuma Center of Excellence for Desert Agriculture, University of Arizona, Yuma, AZ, United States of America
- BIO5 Institute, University of Arizona, Tucson, AZ, United States of America
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Li X, Cheng X, Wu J, Cai Z, Wang Z, Zhou J. Multi-omics reveals different impact patterns of conventional and biodegradable microplastics on the crop rhizosphere in a biofertilizer environment. JOURNAL OF HAZARDOUS MATERIALS 2024; 467:133709. [PMID: 38330650 DOI: 10.1016/j.jhazmat.2024.133709] [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: 12/16/2023] [Revised: 01/28/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
Microplastics (MPs) from the incomplete degradation of agricultural mulch can stress the effectiveness of biofertilizers and ultimately affect the rhizosphere environment of crops. Yet, the involved mechanisms are poorly known and robust empirical data is generally lacking. Here, conventional polyethylene (PE) MPs and poly(butylene adipate-co-butylene terephthalate) (PBAT) / poly(lactic acid) (PLA) biodegradable MPs (PBAT-PLA BioMPs) were investigated to assess their potential impact on the rhizosphere environment of Brassica parachinensis in the presence of Bacillus amyloliquefaciens biofertilizer. The results revealed that both MPs caused different levels of inhibited crop both above- and belowground crop biomass (up to 50.11% and 57.09%, respectively), as well as a significant decrease in plant height (up to 48.63% and 25.95%, respectively), along with an imbalance of microbial communities. Transcriptomic analyses showed that PE MPs mainly affected root's vitamin metabolism, whereas PBAT-PLA BioMPs mainly interfered with the lipid's enrichment. Metabolomic analyses further indicated that PE MPs interfered with amino acid synthesis that involved in crops' oxidative stress, and that PBAT-PLA BioMPs mainly affected the pathways associated with root growth. Additionally, PBAT-PLA BioMPs had a bigger ecological negative impact than did PE MPs, as evidenced by more pronounced alterations in root antioxidant abilities, a higher count of identified differential metabolites, more robust interrelationships among rhizosphere parameters, and a more intricate pattern of impacts on rhizosphere metrics. This study highlights the MPs' impact on crop rhizosphere in a biofertilizer environment from a rhizosphere multi-omics perspective, and has theoretical implications for scientific application of biofertilizers.
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Affiliation(s)
- Xinyang Li
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Xueyu Cheng
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Jialing Wu
- Ecological Fertilizer Research Institute, Shenzhen Batian Ecological Engineering Co., Ltd., Shenzhen, PR China
| | - Zhonghua Cai
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China
| | - Zongkang Wang
- Ecological Fertilizer Research Institute, Shenzhen Batian Ecological Engineering Co., Ltd., Shenzhen, PR China
| | - Jin Zhou
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, PR China.
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Hathurusinghe SHK, Azizoglu U, Shin JH. Holistic Approaches to Plant Stress Alleviation: A Comprehensive Review of the Role of Organic Compounds and Beneficial Bacteria in Promoting Growth and Health. PLANTS (BASEL, SWITZERLAND) 2024; 13:695. [PMID: 38475541 DOI: 10.3390/plants13050695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/06/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024]
Abstract
Plants select microorganisms from the surrounding bulk soil, which act as a reservoir of microbial diversity and enrich a rhizosphere microbiome that helps in growth and stress alleviation. Plants use organic compounds that are released through root exudates to shape the rhizosphere microbiome. These organic compounds are of various spectrums and technically gear the interplay between plants and the microbial world. Although plants naturally produce organic compounds that influence the microbial world, numerous efforts have been made to boost the efficiency of the microbiome through the addition of organic compounds. Despite further crucial investigations, synergistic effects from organic compounds and beneficial bacteria combinations have been reported. In this review, we examine the relationship between organic compounds and beneficial bacteria in determining plant growth and biotic and abiotic stress alleviation. We investigate the molecular mechanism and biochemical responses of bacteria to organic compounds, and we discuss the plant growth modifications and stress alleviation done with the help of beneficial bacteria. We then exhibit the synergistic effects of both components to highlight future research directions to dwell on how microbial engineering and metagenomic approaches could be utilized to enhance the use of beneficial microbes and organic compounds.
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Affiliation(s)
| | - Ugur Azizoglu
- Department of Crop and Animal Production, Safiye Cikrikcioglu Vocational College, Kayseri University, Kayseri 38039, Turkey
- Genome and Stem Cell Research Center, Erciyes University, Kayseri 38039, Turkey
| | - Jae-Ho Shin
- Department of Applied Biosciences, Kyungpook National University, Daegu 41566, Republic of Korea
- Department of Integrative Biology, Kyungpook National University, Daegu 41566, Republic of Korea
- NGS Core Facility, Kyungpook National University, Daegu 41566, Republic of Korea
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Wang W, Li D, Qiu X, Yang J, Liu L, Wang E, Yuan H. Selective regulation of endophytic bacteria and gene expression in soybean by water-soluble humic materials. ENVIRONMENTAL MICROBIOME 2024; 19:2. [PMID: 38178261 PMCID: PMC10768371 DOI: 10.1186/s40793-023-00546-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 12/24/2023] [Indexed: 01/06/2024]
Abstract
BACKGROUND As part of the plant microbiome, endophytic bacteria play an essential role in plant growth and resistance to stress. Water-soluble humic materials (WSHM) is widely used in sustainable agriculture as a natural and non-polluting plant growth regulator to promote the growth of plants and beneficial bacteria. However, the mechanisms of WSHM to promote plant growth and the evidence for commensal endophytic bacteria interaction with their host remain largely unknown. Here, 16S rRNA gene sequencing, transcriptomic analysis, and culture-based methods were used to reveal the underlying mechanisms. RESULTS WSHM reduced the alpha diversity of soybean endophytic bacteria, but increased the bacterial interactions and further selectively enriched the potentially beneficial bacteria. Meanwhile, WSHM regulated the expression of various genes related to the MAPK signaling pathway, plant-pathogen interaction, hormone signal transduction, and synthetic pathways in soybean root. Omics integration analysis showed that Sphingobium was the genus closest to the significantly changed genes in WSHM treatment. The inoculation of endophytic Sphingobium sp. TBBS4 isolated from soybean significantly improved soybean nodulation and growth by increasing della gene expression and reducing ethylene release. CONCLUSION All the results revealed that WSHM promotes soybean nodulation and growth by selectively regulating soybean gene expression and regulating the endophytic bacterial community, Sphingobium was the key bacterium involved in plant-microbe interaction. These findings refined our understanding of the mechanism of WSHM promoting soybean nodulation and growth and provided novel evidence for plant-endophyte interaction.
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Affiliation(s)
- Wenqian Wang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, 100193, Beijing, China
| | - Dongmei Li
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, 100193, Beijing, China
| | - Xiaoqian Qiu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, 100193, Beijing, China
| | - Jinshui Yang
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, 100193, Beijing, China
| | - Liang Liu
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, 100193, Beijing, China
| | - Entao Wang
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, C.P. 11340, Ciudad de México, México
| | - Hongli Yuan
- State Key Laboratory of Animal Biotech Breeding, College of Biological Sciences, China Agricultural University, No.2 Yuanmingyuan West Road, Haidian District, 100193, Beijing, China.
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Thompson MEH, Shrestha A, Rinne J, Limay-Rios V, Reid L, Raizada MN. The Cultured Microbiome of Pollinated Maize Silks Shifts after Infection with Fusarium graminearum and Varies by Distance from the Site of Pathogen Inoculation. Pathogens 2023; 12:1322. [PMID: 38003787 PMCID: PMC10675081 DOI: 10.3390/pathogens12111322] [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: 10/04/2023] [Revised: 10/31/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
Styles transmit pollen-derived sperm nuclei from pollen to ovules, but also transmit environmental pathogens. The microbiomes of styles are likely important for reproduction/disease, yet few studies exist. Whether style microbiome compositions are spatially responsive to pathogens is unknown. The maize pathogen Fusarium graminearum enters developing grain through the style (silk). We hypothesized that F. graminearum treatment shifts the cultured transmitting silk microbiome (TSM) compared to healthy silks in a distance-dependent manner. Another objective of the study was to culture microbes for future application. Bacteria were cultured from husk-covered silks of 14 F. graminearum-treated diverse maize genotypes, proximal (tip) and distal (base) to the F. graminearum inoculation site. Long-read 16S sequences from 398 isolates spanned 35 genera, 71 species, and 238 OTUs. More bacteria were cultured from F. graminearum-inoculated tips (271 isolates) versus base (127 isolates); healthy silks were balanced. F. graminearum caused a collapse in diversity of ~20-25% across multiple taxonomic levels. Some species were cultured exclusively or, more often, from F. graminearum-treated silks (e.g., Delftia acidovorans, Klebsiella aerogenes, K. grimontii, Pantoea ananatis, Stenotrophomonas pavanii). Overall, the results suggest that F. graminearum alters the TSM in a distance-dependent manner. Many isolates matched taxa that were previously identified using V4-MiSeq (core and F. graminearum-induced), but long-read sequencing clarified the taxonomy and uncovered greater diversity than was initially predicted (e.g., within Pantoea). These isolates represent the first comprehensive cultured collection from pathogen-treated maize silks to facilitate biocontrol efforts and microbial marker-assisted breeding.
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Affiliation(s)
- Michelle E. H. Thompson
- Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada; (M.E.H.T.)
| | - Anuja Shrestha
- Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada; (M.E.H.T.)
| | - Jeffrey Rinne
- Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada; (M.E.H.T.)
| | - Victor Limay-Rios
- Department of Plant Agriculture, University of Guelph Ridgetown Campus, 120 Main Street E, Ridgetown, ON N0P 2C0, Canada
| | - Lana Reid
- Ottawa Research and Development Centre, Agriculture and Agri-Food Canada, Central Experimental Farm, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada
| | - Manish N. Raizada
- Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada; (M.E.H.T.)
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