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Asad S, Priyashantha AKH, Tibpromma S, Luo Y, Zhang J, Fan Z, Zhao L, Shen K, Niu C, Lu L, Promputtha I, Karunarathna SC. Coffee-Associated Endophytes: Plant Growth Promotion and Crop Protection. BIOLOGY 2023; 12:911. [PMID: 37508343 PMCID: PMC10376224 DOI: 10.3390/biology12070911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/15/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023]
Abstract
Endophytic microbes are a ubiquitous group of plant-associated communities that colonize the intercellular or intracellular host tissues while providing numerous beneficial effects to the plants. All the plant species are thought to be associated with endophytes, majorly constituted with bacteria and fungi. During the last two decades, there has been a considerable movement toward the study of endophytes associated with coffee plants. In this review, the main consideration is given to address the coffee-associated endophytic bacteria and fungi, particularly their action on plant growth promotion and the biocontrol of pests. In addition, we sought to identify and analyze the gaps in the available research. Additionally, the potential of endophytes to improve the quality of coffee seeds is briefly discussed. Even though there are limited studies on the subject, the potentiality of coffee endophytes in plant growth promotion through enhancing nitrogen fixation, availability of minerals, nutrient absorption, secretion of phytohormones, and other bioactive metabolites has been well recognized. Further, the antagonistic effect against various coffee pathogenic bacteria, fungi, nematodes, and also insect pests leads to the protection of the crop. Furthermore, it is recognized that endophytes enhance the sensory characteristics of coffee as a new field of study.
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Affiliation(s)
- Suhail Asad
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | | | - Saowaluck Tibpromma
- Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Yinling Luo
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Jianqiang Zhang
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Zhuqing Fan
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Likun Zhao
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Ke Shen
- School of Biology and Chemistry, Pu'er University, Pu'er 665000, China
| | - Chen Niu
- Spice and Beverage Research Institute, Chinese Academy of Tropical Agriculture Sciences, Haikou 570100, China
| | - Li Lu
- Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, China
| | - Itthayakorn Promputtha
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Samantha C Karunarathna
- Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing 655011, China
- National Institute of Fundamental Studies (NIFS), Hantana Road, Kandy 20000, Sri Lanka
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Ivo Ganchev. Role of Multispecies Biofilms with a Dominance of Bacillus subtilis in the Rhizosphere. BIOL BULL+ 2022. [DOI: 10.1134/s1062359021150061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Zhang X, Yu J, Huang Z, Li H, Liu X, Huang J, Zhuo R, Wu Z, Qin X, Gao Y, Wang M, Zhu Y. Enhanced Cd phytostabilization and rhizosphere bacterial diversity of Robinia pseudoacacia L. by endophyte Enterobacter sp. YG-14 combined with sludge biochar. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 787:147660. [PMID: 34004543 DOI: 10.1016/j.scitotenv.2021.147660] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/09/2021] [Accepted: 05/05/2021] [Indexed: 05/19/2023]
Abstract
Robinia pseudoacacia L., a pioneer woody legume grown in mining areas, has been recognized as a remarkable accumulator of various heavy metals. Compared with other hazardous heavy metals (HMs), it is of low capacity in accumulating Cd, which, as a result, may hinder the phytoremediation efficiency. To enhance R. pseudoacacia's uptake efficiency of Cd, the individual effects of various rhizobia and arbuscular mycorrhizal fungi have been reported, however, the combined influence of endophytes and biochar receives little attention. In the current study, a Cd-adsorbing endophyte Enterobacter sp. YG-14 was inoculated to R. pseudoacacia, and its extraordinary effect on increasing R. pseudoacacia's Cd uptake was found, which was ascribed to the reinforced root Cd chelation by the strain through secreting siderophores/LMWOAs. Further, P-enriched sludge biochar was applied along with YG-14 to form a combined biochar-endophyte-accumulator system, in which biomineralization were reinforced (i.e. CdCO3 and Cd2P2O7 were generated), as the total and acid-soluble Cd in rhizosphere were reduced by 61.75% and 69.01% respectively, and soil's bacterial diversity was further improved with diversified N2-fixing microbial biomarkers. Multiple synergistic effects (E > 0) were also found, with the optimum performance on plant growth parameters (increased by 39.61%-561.91%) in comparison to the control group. Moreover, the system exhibited a preferable Cd phytostabilization capacity with the highest increase (81.42%) in Cd accumulation and a significant reduction (72.73%) in Cd root-to-shoot translocation.
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Affiliation(s)
- Xuan Zhang
- Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410008, Hunan, PR China; State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Jinlan Yu
- Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410008, Hunan, PR China; State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Zhongliang Huang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Hui Li
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Xuanming Liu
- Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410008, Hunan, PR China
| | - Jing Huang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Rui Zhuo
- Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410008, Hunan, PR China
| | - Zijian Wu
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Xiaoli Qin
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Yan Gao
- Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410008, Hunan, PR China
| | - Mengyuan Wang
- State Key Laboratory of Utilization of Woody Oil Resource, Hunan Academy of Forestry, Changsha 410004, PR China
| | - Yonghua Zhu
- Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410008, Hunan, PR China.
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Sofy MR, Aboseidah AA, Heneidak SA, Ahmed HR. ACC deaminase containing endophytic bacteria ameliorate salt stress in Pisum sativum through reduced oxidative damage and induction of antioxidative defense systems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:40971-40991. [PMID: 33772716 DOI: 10.1007/s11356-021-13585-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 03/17/2021] [Indexed: 05/07/2023]
Abstract
Approximately 6% of the world's total land area and 20% of the irrigated land are affected by salt stress. Egypt is one such country affected by salt-stress problems. This paper focuses on the role of isolated bacteria, such as Bacillus subtilis and Pseudomonas fluorescens, in alleviating the harmful effects of salt stress. The results show that the irrigation of plants with different concentrations of saline water (0, 75, and 150 mM NaCl) leads to significantly decreased growth criteria, photosynthetic pigments (i.e., chl a, chl b, and carotenoids), and membrane stability index (MSI) values. Moreover, malondialdehyde (MDA), glutathione content, endogenous proline, the antioxidant defense system, 1-aminocyclopropane-1-carboxylic acid (ACC) content, ACC synthase (ACS), ACC oxidase (ACO), and Na+ content were significantly increased under NaCl-stress exposure. On the contrary, treatment with endophytic bacteria significantly increased the resistance of pea plants to salt stress by increasing the enzymatic antioxidant defenses (i.e., superoxide dismutase, catalase, peroxidase, and glutathione reductase), non-enzymatic antioxidant defenses (i.e., glutathione), osmolyte substances such as proline, and antioxidant enzyme gene expression. As a result, endophytic bacteria's use was significantly higher compared to control values for indole-3-acetic acid (IAA), gibberellic acid GA3, MSI, and photosynthetic pigments. The use of endophytic bacteria significantly decreased Na+ accumulation while, at the same time, promoting K+ uptake. In conclusion, the induction of endophytic bacterium-induced salt tolerance in pea plants depends primarily on the effect of endophytic bacteria on osmoregulation, the antioxidant capacity, and ion uptake adjustment by limiting the uptake of Na+ and, alternatively, increasing the accumulation of K+ in plant tissue.
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Affiliation(s)
- Mahmoud R Sofy
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, 11884 Nasr City, Cairo, Egypt.
| | - Akram A Aboseidah
- Botany and Microbiology Department, Faculty of Science, Suez University, Suez, Egypt
| | - Samia A Heneidak
- Botany and Microbiology Department, Faculty of Science, Suez University, Suez, Egypt
| | - Hoda R Ahmed
- Botany and Microbiology Department, Faculty of Science, Suez University, Suez, Egypt
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Sha Y, Zeng Q, Sui S. Screening and Application of Bacillus Strains Isolated from Nonrhizospheric Rice Soil for the Biocontrol of Rice Blast. THE PLANT PATHOLOGY JOURNAL 2020; 36:231-243. [PMID: 32547339 PMCID: PMC7272846 DOI: 10.5423/ppj.oa.02.2020.0028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 04/01/2020] [Accepted: 04/27/2020] [Indexed: 05/05/2023]
Abstract
Rice blast, caused by Magnaporthe oryzae, is one of the most destructive rice diseases worldwide. The aim of this study was to screen bacterial isolates to efficiently prevent the occurrence of rice blast. A total of 232 bacterial isolates were extracted from nonrhizospheric rice soil and were screened for antifungal activity against M. oryzae using a leaf segment assay. Strains S170 and S9 showed significant antagonistic activity against M. oryzae in vitro and in leaf disk assays, and controlled M. oryzae infection under greenhouse conditions. The results showed that strains S170 and S9 could effectively control rice leaf blast and panicle neck blast after five spray treatments in field. This suggested that the bacterial strains S170 and S9 were valuable and promising for the biocontrol of rice disease caused by M. oryzae. Based on 16S rDNA, and gyrA and gyrB gene sequence analyses, S170 and S9 were identified as Bacillus amyloliquefaciens and B. pumilus, respectively. The research also demonstrated that B. amyloliquefaciens S170 and B. pumilus S9 could colonize rice plants to prevent pathogenic infection and evidently suppressed plant disease caused by 11 other plant pathogenic fungi. This is the first study to demonstrate that B. amyloliquefaciens and B. pumilus isolated from nonrhizospheric rice soil are capable of recolonizing internal rice stem tissues.
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Affiliation(s)
- Yuexia Sha
- Institute of Plant Protection, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750011, China
- Corresponding author. Phone) +86-951-6886807, FAX) +86-951-6886917, E-mail) , ORCID Yuexia Sha https://orcid.org/0000-0002-2426-8218
| | - Qingchao Zeng
- College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Shuting Sui
- College of Plant Protection, China Agricultural University, Beijing 100193, China
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6
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Rani M, Weadge JT, Jabaji S. Isolation and Characterization of Biosurfactant-Producing Bacteria From Oil Well Batteries With Antimicrobial Activities Against Food-Borne and Plant Pathogens. Front Microbiol 2020; 11:64. [PMID: 32256455 PMCID: PMC7093026 DOI: 10.3389/fmicb.2020.00064] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 01/13/2020] [Indexed: 11/29/2022] Open
Abstract
Microbial biosurfactants, produced by fungi, yeast, and bacteria, are surface-active compounds with emulsifying properties that have a number of known activities, including the solubilization of microbial biofilms. In an on-going survey to uncover new or enhanced antimicrobial metabolite-producing microbes from harsh environments, such as oil-rich niches, 123 bacterial strains were isolated from three oil batteries in the region of Chauvin, Alberta, and characterized by 16S rRNA gene sequencing. Based on their nucleotide sequences, the strains are associated with 3 phyla (Actinobacteria, Proteobacteria and Firmicutes), as well as 17 other discrete genera that shared high homology with known sequences, with the majority of these strains identified to the species level. The most prevalent strains associated with the three oil wells belonged to the Bacillus genus. Thirty-four of the 123 strains were identified as biosurfactant-producers, among which Bacillus methylotrophicus strain OB9 exhibited the highest biosurfactant activity based on multiple screening methods and a comparative analysis with the commercially available biosurfactant, Tween 20. B. methylotrophicus OB9 was selected for further antimicrobial analysis and addition of live cultures of B. methylotrophicus OB9 (or partially purified biosurfactant fractions thereof) were highly effective on biofilm disruption in agar diffusion assays against several Gram-negative food-borne bacteria and plant pathogens. Upon co-culturing with B. methylotrophicus OB9, the number of either Salmonella enterica subsp. enterica Newport SL1 or Xanthomonas campestris B07.007 cells significantly decreased after 6 h and were not retrieved from co-cultures following 12 h exposure. These results also translated to studies on plants, where bacterized tomato seedlings with OB9 significantly protected the tomato leaves from Salmonella enterica Newport SL1 contamination, as evidenced by a 40% reduction of log10 CFU of Salmonella/mg leaf tissue compared to non-bacterized tomato leaves. When B. methylotrophicus 0B9 was used for bacterized lettuce, the growth of X. campestris B07.007, the causal agent of bacterial leaf spot of lettuce, was completely inhibited. While limited, these studies are noteworthy as they demonstrate the inhibition spectrum of B. methylotrophicus 0B9 against both human and plant pathogens; thereby making this bacterium attractive for agricultural and food safety applications in a climate where microbial-biofilm persistence is an increasing problem.
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Affiliation(s)
- Mamta Rani
- Department of Plant Science, Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, QC, Canada
| | - Joel T. Weadge
- Department of Biology, Wilfrid Laurier University, Waterloo, ON, Canada
| | - Suha Jabaji
- Department of Plant Science, Faculty of Agricultural and Environmental Sciences, McGill University, Montreal, QC, Canada
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Yadav V, Lekkala MMVSN, Surekha C, Neelapu NRR. Global Scenario of Advance Fungal Research in Crop Protection. Fungal Biol 2020. [DOI: 10.1007/978-3-030-48474-3_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Aslam M, Nasim FUH, Ruhi R, Murad H, Ejaz S, Choudhary MS, Mustafa G, Ashraf M, Rehman J. Isolation and Characteristics of Biotechnologically Important Antagonistic Thermophilic Bacteria from Rhizosphere of Haloxylon salicornicum. Pol J Microbiol 2018; 67:49-58. [PMID: 30015424 DOI: 10.5604/01.3001.0011.6142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2017] [Indexed: 11/13/2022] Open
Abstract
Rhizobacteria are an active part of microbial population in the rhizosphere of plants. In this study, twenty rhizobacteria were isolated from the rhizosphere of a perennial grass, Haloxylon salicornicum, found in Cholistan desert, an arid landmass near Bahawalpur Pakistan, in one set of experimental conditions. Colony characteristics, biochemical and molecular analyses of these isolates were performed. All isolates were bacilli, gram positive with off-white colonies and exhibited typical bacilli colony morphology. None of the isolates was gelatinase, urease, indole, H2S and catalase producer. Eleven isolates were amylase producers and 8 isolates were acid producers. All isolates fermented glucose, 3 fermented lactose and 19 fermented fructose. Molecular data revealed that out of twenty isolates, 14 isolates showed 91-99% identity with Brevibacillus borstelensis, 4 with Bacillus subtilis (97-98%) and 2 with Bacillus licheniformis (94-99%) through BLAST analysis. All identified bacterial isolates cladded with their respective groups in the phylogenetic tree. Many (11-15 out of 20) of the isolates were more effective in inhibiting growth of the tested bacterial strains as compared to the positive control (Ampicillin 50 μg/disc). We conclude that bacilli are the predominant form populating rhizosphere of this desert grass. Among the isolated bacteria Brevibacillus borstelensis, Bacillus subtilis and Bacillus licheniformis are the most predominant species.
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Affiliation(s)
- Muhammad Aslam
- Department of Chemistry, The Islamia University of Bahawalpur,Bahawalpur,Pakistan
| | - Faiz-Ul-Hassan Nasim
- Department of Chemistry, The Islamia University of Bahawalpur,Bahawalpur,Pakistan.,Department of Chemistry, Government Sadiq College Women University,Bahawalpur,Pakistan
| | - Rana Ruhi
- Department of Chemistry, The Islamia University of Bahawalpur,Bahawalpur,Pakistan.,Department of Chemistry, Government Sadiq College Women University,Bahawalpur,Pakistan
| | - Hassan Murad
- Department of Chemistry, The Islamia University of Bahawalpur,Bahawalpur,Pakistan
| | - Samina Ejaz
- Department of Biochemistry and Biotechnology, The Islamia University of Bahawalpur,Bahawalpur,Pakistan
| | | | - Ghulam Mustafa
- Department of Biochemistry, University of Agriculture,Faisalabad,Pakistan
| | - Muhammad Ashraf
- Department of Chemistry, The Islamia University of Bahawalpur,Bahawalpur,Pakistan
| | - Jameel Rehman
- Department of Chemistry, The Islamia University of Bahawalpur,Bahawalpur,Pakistan
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Egamberdieva D, Wirth SJ, Shurigin VV, Hashem A, Abd Allah EF. Endophytic Bacteria Improve Plant Growth, Symbiotic Performance of Chickpea ( Cicer arietinum L.) and Induce Suppression of Root Rot Caused by Fusarium solani under Salt Stress. Front Microbiol 2017; 8:1887. [PMID: 29033922 PMCID: PMC5625113 DOI: 10.3389/fmicb.2017.01887] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Accepted: 09/14/2017] [Indexed: 11/25/2022] Open
Abstract
Salinity causes disturbance in symbiotic performance of plants, and increases susceptibility of plants to soil-borne pathogens. Endophytic bacteria are an essential determinant of cross-tolerance to biotic and abiotic stresses in plants. The aim of this study was to isolate non–rhizobial endophytic bacteria from the root nodules of chickpea (Cicer arietinum L.), and to assess their ability to improve plant growth and symbiotic performance, and to control root rot in chickpea under saline soil conditions. A total of 40 bacterial isolates from internal root tissues of chickpea grown in salinated soil were isolated. Four bacterial isolates, namely Bacillus cereus NUU1, Achromobacter xylosoxidans NUU2, Bacillus thuringiensis NUU3, and Bacillus subtilis NUU4 colonizing root tissue demonstrated plant beneficial traits and/or antagonistic activity against F. solani and thus were characterized in more detail. The strain B. subtilis NUU4 proved significant plant growth promotion capabilities, improved symbiotic performance of host plant with rhizobia, and promoted yield under saline soil as compared to untreated control plants under field conditions. A combined inoculation of chickpea with M. ciceri IC53 and B. subtilis NUU4 decreased H2O2 concentrations and increased proline contents compared to the un-inoculated plants indicating an alleviation of adverse effects of salt stress. Furthermore, the bacterial isolate was capable to reduce the infection rate of root rot in chickpea caused by F. solani. This is the first report of F. solani causing root rot of chickpea in a salinated soil of Uzbekistan. Our findings demonstrated that the endophytic B. subtilis strain NUU4 provides high potentials as a stimulator for plant growth and as biological control agent of chickpea root rot under saline soil conditions. These multiple relationships could provide promising practical approaches to increase the productivity of legumes under salt stress.
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Affiliation(s)
- Dilfuza Egamberdieva
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape Biogeochemistry, Müncheberg, Germany.,Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan
| | - Stephan J Wirth
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape Biogeochemistry, Müncheberg, Germany
| | | | - Abeer Hashem
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.,Mycology and Plant Disease Survey Department, Plant Pathology Research Institute, Giza, Egypt
| | - Elsayed F Abd Allah
- Plant Production Department, College of Food and Agricultural Sciences, King Saud University, Riyadh, Saudi Arabia
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10
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Bacterial Endophytes of Plants: Diversity, Invasion Mechanisms and Effects on the Host. SUSTAINABLE DEVELOPMENT AND BIODIVERSITY 2017. [DOI: 10.1007/978-3-319-66541-2_2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Egamberdieva D, Wirth S, Abd-Allah EF. Tripartite Interaction Among Root-Associated Beneficial Microbes Under Stress. RHIZOTROPHS: PLANT GROWTH PROMOTION TO BIOREMEDIATION 2017:219-236. [DOI: 10.1007/978-981-10-4862-3_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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12
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Hashem A, Abd_Allah EF, Alqarawi AA, Al-Huqail AA, Wirth S, Egamberdieva D. The Interaction between Arbuscular Mycorrhizal Fungi and Endophytic Bacteria Enhances Plant Growth of Acacia gerrardii under Salt Stress. Front Microbiol 2016; 7:1089. [PMID: 27486442 PMCID: PMC4949997 DOI: 10.3389/fmicb.2016.01089] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 06/29/2016] [Indexed: 11/13/2022] Open
Abstract
Microbes living symbiotically in plant tissues mutually cooperate with each other by providing nutrients for proliferation of the partner organism and have a beneficial effect on plant growth. However, few studies thus far have examined the interactive effect of endophytic bacteria and arbuscular mycorrhizal fungi (AMF) in hostile conditions and their potential to improve plant stress tolerance. In this study, we investigated how the synergistic interactions of endophytic bacteria and AMF affect plant growth, nodulation, nutrient acquisition and stress tolerance of Acacia gerrardii under salt stress. Plant growth varied between the treatments with both single inoculants and was higher in plants inoculated with the endophytic B. subtilis strain than with AMF. Co-inoculated A. gerrardii had a significantly greater shoot and root dry weight, nodule number, and leghemoglobin content than those inoculated with AMF or B. subtilis alone under salt stress. The endophytic B. subtilis could alleviate the adverse effect of salt on AMF colonization. The differences in nitrate and nitrite reductase and nitrogenase activities between uninoculated plants and those inoculated with AMF and B. subtilis together under stress were significant. Both inoculation treatments, either B. subtilis alone or combined with AMF, enhanced the N, P, K, Mg, and Ca contents and phosphatase activities in salt-stressed A. gerrardii tissues and reduced Na and Cl concentration, thereby protecting salt-stressed plants from ionic and osmotic stress-induced changes. In conclusion, our results indicate that endophytic bacteria and AMF contribute to a tripartite mutualistic symbiosis in A. gerrardii and are coordinately involved in the plant adaptation to salt stress tolerance.
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Affiliation(s)
- Abeer Hashem
- Department of Botany and Microbiology, Faculty of Science, King Saud UniversityRiyadh, Saudi Arabia
- Department of Mycology and Plant Disease Survey, Agriculture Research Center, Plant Pathology Research InstituteGiza, Egypt
| | - Elsayed F. Abd_Allah
- Department of Plant Production, Faculty of Food and Agricultural Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Abdulaziz A. Alqarawi
- Department of Plant Production, Faculty of Food and Agricultural Sciences, King Saud UniversityRiyadh, Saudi Arabia
| | - Asma A. Al-Huqail
- Department of Botany and Microbiology, Faculty of Science, King Saud UniversityRiyadh, Saudi Arabia
| | - Stephan Wirth
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape BiogeochemistryMüncheberg, Germany
| | - Dilfuza Egamberdieva
- Leibniz Centre for Agricultural Landscape Research, Institute of Landscape BiogeochemistryMüncheberg, Germany
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13
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Gagné-Bourque F, Mayer BF, Charron JB, Vali H, Bertrand A, Jabaji S. Accelerated Growth Rate and Increased Drought Stress Resilience of the Model Grass Brachypodium distachyon Colonized by Bacillus subtilis B26. PLoS One 2015; 10:e0130456. [PMID: 26103151 PMCID: PMC4477885 DOI: 10.1371/journal.pone.0130456] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 05/20/2015] [Indexed: 11/18/2022] Open
Abstract
Plant growth-promoting bacteria (PGB) induce positive effects in plants, for instance, increased growth and reduced abiotic stresses susceptibility. The mechanisms by which these bacteria impact the host plant are numerous, diverse and often specific. Here, we studied the agronomical, molecular and biochemical effects of the endophytic PGB Bacillus subtilis B26 on the full life cycle of Brachypodium distachyon Bd21, an established model species for functional genomics in cereal crops and temperate grasses. Inoculation of Brachypodium with B. subtilis strain B26 increased root and shoot weights, accelerated growth rate and seed yield as compared to control plants. B. subtilis strain B26 efficiently colonized the plant and was recovered from roots, stems and blades as well as seeds of Brachypodium, indicating that the bacterium is able to migrate, spread systemically inside the plant, establish itself in the aerial plant tissues and organs, and is vertically transmitted to seeds. The presence of B. subtilis strain B26 in the seed led to systemic colonization of the next generation of Brachypodium plants. Inoculated Brachypodium seedlings and mature plants exposed to acute and chronic drought stress minimized the phenotypic effect of drought compared to plants not harbouring the bacterium. Protection from the inhibitory effects of drought by the bacterium was linked to upregulation of the drought-response genes, DREB2B-like, DHN3-like and LEA-14-A-like and modulation of the DNA methylation genes, MET1B-like, CMT3-like and DRM2-like, that regulate the process. Additionally, total soluble sugars and starch contents increased in stressed inoculated plants, a biochemical indication of drought tolerance. In conclusion, we show a single inoculation of Brachypodium with a PGB affected the whole growth cycle of the plant, accelerating its growth rates, shortening its vegetative period, and alleviating drought stress effects. These effects are relevant to grasses and cereal crops.
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Affiliation(s)
- François Gagné-Bourque
- Department of Plant Science, Macdonald Campus of McGill University, 21,111 Lakeshore Rd. Ste-Anne-de-Bellevue, Québec, CANADA, H9X 3V9
| | - Boris F. Mayer
- Department of Plant Science, Macdonald Campus of McGill University, 21,111 Lakeshore Rd. Ste-Anne-de-Bellevue, Québec, CANADA, H9X 3V9
| | - Jean-Benoit Charron
- Department of Plant Science, Macdonald Campus of McGill University, 21,111 Lakeshore Rd. Ste-Anne-de-Bellevue, Québec, CANADA, H9X 3V9
- * E-mail: (SJ); (JBC)
| | - Hojatollah Vali
- Facility of Electron Microscopy Research (FEMR) McGill University, 3640 University Street, Montréal, Québec, CANADA, H3A 0C7
| | - Annick Bertrand
- Soils and Crops Research Development Center, Agriculture and Agri-Food Canada, 2560 Hochelaga Boulevard, Québec City, Québec, CANADA, G1V 2J3
| | - Suha Jabaji
- Department of Plant Science, Macdonald Campus of McGill University, 21,111 Lakeshore Rd. Ste-Anne-de-Bellevue, Québec, CANADA, H9X 3V9
- * E-mail: (SJ); (JBC)
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Edgar RC. UPARSE: highly accurate OTU sequences from microbial amplicon reads. Nat Methods 2013; 10:996-998. [PMID: 23955772 DOI: 10.1007/978-3-319-44409-3_5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 07/15/2013] [Indexed: 05/20/2023]
Abstract
Amplified marker-gene sequences can be used to understand microbial community structure, but they suffer from a high level of sequencing and amplification artifacts. The UPARSE pipeline reports operational taxonomic unit (OTU) sequences with ≤1% incorrect bases in artificial microbial community tests, compared with >3% incorrect bases commonly reported by other methods. The improved accuracy results in far fewer OTUs, consistently closer to the expected number of species in a community.
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Belda E, Sekowska A, Le Fèvre F, Morgat A, Mornico D, Ouzounis C, Vallenet D, Médigue C, Danchin A. An updated metabolic view of the Bacillus subtilis 168 genome. Microbiology (Reading) 2013; 159:757-770. [DOI: 10.1099/mic.0.064691-0] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Affiliation(s)
- Eugeni Belda
- UEVE, Université d'Evry, boulevard François Mitterrand, 91025 Evry, France
- CNRS-UMR 8030, 2 rue Gaston Crémieux, 91057 Evry, France
- CEA, Institut de Génomique, Génoscope Laboratoire d’Analyse Bioinformatique en Génomique et Métabolisme, 2 rue Gaston Crémieux, 91057 Evry, France
| | | | - François Le Fèvre
- UEVE, Université d'Evry, boulevard François Mitterrand, 91025 Evry, France
- CNRS-UMR 8030, 2 rue Gaston Crémieux, 91057 Evry, France
- CEA, Institut de Génomique, Génoscope Laboratoire d’Analyse Bioinformatique en Génomique et Métabolisme, 2 rue Gaston Crémieux, 91057 Evry, France
| | - Anne Morgat
- Swiss Institute of Bioinformatics, CMU, 1 Michel-Servet, CH-1211 Genève 4, Switzerland
| | - Damien Mornico
- UEVE, Université d'Evry, boulevard François Mitterrand, 91025 Evry, France
- CNRS-UMR 8030, 2 rue Gaston Crémieux, 91057 Evry, France
- CEA, Institut de Génomique, Génoscope Laboratoire d’Analyse Bioinformatique en Génomique et Métabolisme, 2 rue Gaston Crémieux, 91057 Evry, France
| | - Christos Ouzounis
- Department of Biochemistry, Li KaShing Faculty of Medicine, The University of Hong Kong, 21, Sassoon Road, Hong Kong SAR, China
- Institute of Applied Biosciences, Centre for Research and Technology Hellas (CERTH), Thessaloniki, Greece
| | - David Vallenet
- UEVE, Université d'Evry, boulevard François Mitterrand, 91025 Evry, France
- CNRS-UMR 8030, 2 rue Gaston Crémieux, 91057 Evry, France
- CEA, Institut de Génomique, Génoscope Laboratoire d’Analyse Bioinformatique en Génomique et Métabolisme, 2 rue Gaston Crémieux, 91057 Evry, France
| | - Claudine Médigue
- UEVE, Université d'Evry, boulevard François Mitterrand, 91025 Evry, France
- CNRS-UMR 8030, 2 rue Gaston Crémieux, 91057 Evry, France
- CEA, Institut de Génomique, Génoscope Laboratoire d’Analyse Bioinformatique en Génomique et Métabolisme, 2 rue Gaston Crémieux, 91057 Evry, France
| | - Antoine Danchin
- Department of Biochemistry, Li KaShing Faculty of Medicine, The University of Hong Kong, 21, Sassoon Road, Hong Kong SAR, China
- AMAbiotics SAS, Bldg G1, 2 rue Gaston Crémieux, 91000 Evry, France
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16
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Lahlali R, Peng G, Gossen BD, McGregor L, Yu FQ, Hynes RK, Hwang SF, McDonald MR, Boyetchko SM. Evidence that the biofungicide Serenade (Bacillus subtilis) suppresses clubroot on canola via antibiosis and induced host resistance. PHYTOPATHOLOGY 2013; 103:245-254. [PMID: 23113546 DOI: 10.1094/phyto-06-12-0123-r] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study investigated how the timing of application of the biofungicide Serenade (Bacillus subtilis QST713) or it components (product filtrate and bacterial cell suspension) influenced infection of canola by Plasmodiophora brassicae under controlled conditions. The biofungicide and its components were applied as a soil drench at 5% concentration (vol/vol or equivalent CFU) to a planting mix infested with P. brassicae at seeding or at transplanting 7 or 14 days after seeding (DAS) to target primary and secondary zoospores of P. brassicae. Quantitative polymerase chain reaction (qPCR) was used to assess root colonization by B. subtilis as well as P. brassicae. The biofungicide was consistently more effective than the individual components in reducing infection by P. brassicae. Two applications were more effective than one, with the biofungicide suppressing infection completely and the individual components reducing clubroot severity by 62 to 83%. The biofungicide also reduced genomic DNA of P. brassicae in canola roots by 26 to 99% at 7 and 14 DAS, and the qPCR results were strongly correlated with root hair infection (%) assessed at the same time (r = 0.84 to 0.95). qPCR was also used to quantify the transcript activity of nine host-defense-related genes in inoculated plants treated with Serenade at 14 DAS for potential induced resistance. Genes encoding the jasmonic acid (BnOPR2), ethylene (BnACO), and phenylpropanoid (BnOPCL and BnCCR) pathways were upregulated by 2.2- to 23-fold in plants treated with the biofungicide relative to control plants. This induced defense response was translocated to the foliage (determined based on the inhibition of infection by Leptosphaeria maculans). It is possible that antibiosis and induced resistance are involved in clubroot suppression by Serenade. Activity against the infection from both primary and secondary zoospores of P. brassicae may be required for maximum efficacy against clubroot.
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Affiliation(s)
- R Lahlali
- Saskatoon Research Centre, Saskatchewan, Canada
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Mitter B, Brader G, Afzal M, Compant S, Naveed M, Trognitz F, Sessitsch A. Advances in Elucidating Beneficial Interactions Between Plants, Soil, and Bacteria. ADVANCES IN AGRONOMY 2013:381-445. [PMID: 0 DOI: 10.1016/b978-0-12-407685-3.00007-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
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