1
|
Wael D, El-Amier Y, Saber WIA, Elsayed A. Plant-associated halotolerant bacteria improving growth of Vicia faba L. Mariout-2 under salinity conditions. Sci Rep 2024; 14:16737. [PMID: 39033227 PMCID: PMC11271455 DOI: 10.1038/s41598-024-66504-0] [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: 11/02/2023] [Accepted: 07/02/2024] [Indexed: 07/23/2024] Open
Abstract
In this comprehensive investigation, we successfully isolated and characterized 40 distinct plant-associated halotolerant bacteria strains obtained from three halophytic plant species: Tamarix nilotica, Suaeda pruinosa, and Arthrocnemum macrostachyum. From this diverse pool of isolates, we meticulously selected five exceptional plant-associated halotolerant bacteria strains through a judiciously designed seed biopriming experiment and then identified molecularly. Bacillus amyloliquefaciens DW6 was isolated from A. macrostachyum. Three bacteria (Providencia rettgeri DW3, Bacillus licheniformis DW4, and Salinicoccus sesuvii DW5) were isolated for the first time from T. nilotica, S. pruinosa and S. pruinosa, respectively. Paenalcaligenes suwonensis DW7 was isolated for the first time from A. macrostachyum. These plant-associated halotolerant bacteria exhibited growth-promoting activities, including phosphate solubilization, nitrogen fixation, and production of bioactive compounds, i.e., ammonia, phytohormones, hydrogen cyanide, siderophores, and exopolysaccharides. A controlled laboratory experiment was conducted to reduce the detrimental impact of soil salinity. Vicia faba seedlings were inoculated individually or in mixtures by the five most effective plant-associated halotolerant bacteria to reduce the impact of salt stress and improve growth parameters. The growth parameters were significantly reduced due to the salinity stress in the control samples, compared to the experimental ones. The unprecedented novelty of our findings is underscored by the demonstrable efficacy of co-inoculation with these five distinct bacterial types as a pioneering bio-approach for countering the deleterious effects of soil salinity on plant growth. This study thus presents a remarkable contribution to the field of plant science and offers a promising avenue for sustainable agriculture in saline environments.
Collapse
Affiliation(s)
- Dalia Wael
- Botany Department, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt.
| | - Yasser El-Amier
- Botany Department, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt
| | - Wesameldin I A Saber
- Microbial Activity Unit, Microbiology Department, Soils, Water and Environment Research Institute, Agricultural Research Center, Giza, 12619, Egypt
| | - Ashraf Elsayed
- Botany Department, Faculty of Science, Mansoura University, Mansoura, 35516, Egypt.
| |
Collapse
|
2
|
Ravinath R, Usha T, Das AJ, Sarangi AN, Sarvashiva Kiran N, Kumar Goyal A, Krishnareddy Prasannakumar M, Ramesh N, Middha SK. Pomegranate Rhizosphere Microbial Diversity Revealed by Metagenomics: Toward Organic Farming, Plant Growth Promotion and Biocontrol? OMICS : A JOURNAL OF INTEGRATIVE BIOLOGY 2024; 28:303-318. [PMID: 38805323 DOI: 10.1089/omi.2023.0272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
Food production must undergo systems change to meet the sustainable development goals (SDGs). For example, organic farming can be empowered by soil microorganisms with plant growth promotion (PGP) and biocontrol features. In this context, there have been limited studies on pomegranate. We investigated microbial diversity in rhizosphere of the pomegranate "Bhagwa" variety and its potential role in PGP and biocontrol. Both bulk and rhizosphere soil samples were analyzed for their physicochemical properties. Whole metagenome sequencing was conducted using the Illumina NovaSeq6000 platform. Surprisingly, we found that bulk and rhizosphere soil samples had comparable microbial diversity. Metagenome sequencing revealed the abundance of Streptomyces indicus, Bradyrhizobium kalamazoonesis, and Pseudomonas cellulosum in the rhizosphere that are reported here for the first time in agricultural literature. Pathway prediction analysis using KEGG (Kyoto Encyclopedia for Genes and Genomes) and COG (clusters of orthologous genes) databases identified metabolic pathways associated with biocontrol properties against pathogens. We confirmed the metagenome data in vitro, which demonstrated their PGP potential and antimicrobial properties. For instance, S. indicus produced high concentration of indole-3-acetic acid, a PGP phytohormone, that can stimulate plant growth. In addition, an antimicrobial susceptibility assay suggested that bacterial extracts displayed activity against Xanthomonas, a primary pathogen causing the pomegranate wilt disease. In conclusion, this study suggests that S. indicus, B. kalamazoonesis, and P. cellulosum can potentially be PGP and biocontrol agents that may contribute to increased crop productivity in pomegranate cultivation. These agents and their combinations warrant future research with an eye on SDGs and so as to enable and innovate organic farming and pomegranate agricultural practices.
Collapse
Affiliation(s)
- Renuka Ravinath
- Department of Biotechnology, School of Applied Sciences, REVA University, Bengaluru, India
| | - Talambedu Usha
- Department of Biochemistry, Maharani Lakshmi Ammanni College for Women, Bengaluru, India
| | - Anupam J Das
- Department of Biotechnology, School of Applied Sciences, REVA University, Bengaluru, India
| | | | | | | | | | - Nijalingappa Ramesh
- Department of Biotechnology, School of Applied Sciences, REVA University, Bengaluru, India
| | - Sushil Kumar Middha
- Department of Biotechnology, Maharani Lakshmi Ammanni College for Women, Bengaluru, India
| |
Collapse
|
3
|
Zhou Q, Xia Z, Zhang Y, Sun Z, Zeng W, Zhang N, Yuan C, Gong C, Zhou Y, Xue W. Design of a delivery vehicle chitosan-based self-assembling: controlled release, high hydrophobicity, and safe treatment of plant fungal diseases. J Nanobiotechnology 2024; 22:121. [PMID: 38504264 PMCID: PMC10949580 DOI: 10.1186/s12951-024-02386-8] [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: 01/19/2024] [Accepted: 03/07/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND Traditional pesticides are poorly water-soluble and suffer from low bioavailability. N-succinyl chitosan (NSCS) is a water-soluble chitosan derivative, has been recently used to encapsulate hydrophobic drugs to improve their bioavailability. However, it remains challenging to synthesize pesticides of a wide variety of water-soluble drugs and to scale up the production in a continuous manner. RESULTS A synthetic method for preparing water-soluble nanopesticides with a polymer carrier was applied. The bioactive molecule BTL-11 was loaded into hollow NSCS to promote drug delivery, improve solubility and anti-fungal activity. The synthesized nanopesticides had well controlled sizes of 606 nm and the encapsulation rate was 80%. The release kinetics, drug toxicity and drug activity were further evaluated. The inhibitory activity of nanopesticides against Rhizoctonia solani (R. solani) was tested in vivo and in vitro. In vivo against R. solani trials revealed that BTL-11 has excellent control efficiency for cultivated rice leaf and sheath was 79.6 and 76.5%, respectively. By contrast, for BTL-11@NSCS NPs, the anti-fungal ability was strongly released and afforded significant control efficiencies of 85.9 and 81.1%. Those effects were significantly better than that of the agricultural fungicide azoxystrobin (51.5 and 66.5%). The proposed mechanism was validated by successfully predicting the synthesis outcomes. CONCLUSIONS This study demonstrates that NSCS is a promising biocompatible carrier, which can enhance the efficacy of pesticides, synergistically improve plant disease resistance, protect crop growth, and can be used for the delivery of more insoluble pesticides.
Collapse
Affiliation(s)
- Qing Zhou
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Zhi Xia
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
- College of Chemistry and Chemical Engineering, Guizhou University of Engineering Science, Bijie, 551700, China
| | - Yu Zhang
- College of Chemistry and Chemical Engineering, Guizhou University of Engineering Science, Bijie, 551700, China
| | - Zhiling Sun
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Wei Zeng
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Nian Zhang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Chunmei Yuan
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Chenyu Gong
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Yuanxiang Zhou
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Wei Xue
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China.
| |
Collapse
|
4
|
Saadouli I, Marasco R, Mejri L, Hamden H, Guerfali MM, Stathopoulou P, Daffonchio D, Cherif A, Ouzari HI, Tsiamis G, Mosbah A. Diversity and adaptation properties of actinobacteria associated with Tunisian stone ruins. Front Microbiol 2022; 13:997832. [PMID: 36583041 PMCID: PMC9793712 DOI: 10.3389/fmicb.2022.997832] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 11/16/2022] [Indexed: 12/15/2022] Open
Abstract
Stone surface is a unique biological niche that may host a rich microbial diversity. The exploration of the biodiversity of the stone microbiome represents a major challenge and an opportunity to characterize new strains equipped with valuable biological activity. Here, we explored the diversity and adaptation strategies of total bacterial communities associated with Roman stone ruins in Tunisia by considering the effects of geo-climatic regions and stone geochemistry. Environmental 16S rRNA gene amplicon was performed on DNA extracted from stones samples collected in three different sampling sites in Tunisia, along an almost 400km aridity transect, encompassing Mediterranean, semiarid and arid climates. The library was sequenced on an Illumina MiSeq sequencing platform. The cultivable Actinobacteria were isolated from stones samples using the dilution plate technique. A total of 71 strains were isolated and identified based on 16S rRNA gene sequences. Cultivable actinobacteria were further investigated to evaluate the adaptative strategies adopted to survive in/on stones. Amplicon sequencing showed that stone ruins bacterial communities were consistently dominated by Cyanobacteria, followed by Proteobacteria and Actinobacteria along the aridity gradient. However, the relative abundance of the bacterial community components changed according to the geo-climatic origin. Stone geochemistry, particularly the availability of magnesium, chromium, and copper, also influenced the bacterial communities' diversity. Cultivable actinobacteria were further investigated to evaluate the adaptative strategies adopted to survive in/on stones. All the cultivated bacteria belonged to the Actinobacteria class, and the most abundant genera were Streptomyces, Kocuria and Arthrobacter. They were able to tolerate high temperatures (up to 45°C) and salt accumulation, and they produced enzymes involved in nutrients' solubilization, such as phosphatase, amylase, protease, chitinase, and cellulase. Actinobacteria members also had an important role in the co-occurrence interactions among bacteria, favoring the community interactome and stabilization. Our findings provide new insights into actinobacteria's diversity, adaptation, and role within the microbiome associated with stone ruins.
Collapse
Affiliation(s)
- Ilhem Saadouli
- Laboratory of Microorganisms and Active Biomolecules, LMBA-LR03ES03, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
| | - Ramona Marasco
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Lassaad Mejri
- Laboratory “Energy and Matter for Development of Nuclear Sciences” (LR16CNSTN02), National Center for Nuclear Sciences and Technology, Sidi Thabet Technopark, Sidi Thabet, Tunisia
| | - Haytham Hamden
- Laboratory of Biotechnology and Nuclear Technologies, LR16CNSTN02, National Centre of Nuclear Sciences and Technologies, Sidi Thabet, Tunisia
| | - Meriem M’saad Guerfali
- Laboratory of Biotechnology and Nuclear Technologies, LR16CNSTN02, National Centre of Nuclear Sciences and Technologies, Sidi Thabet, Tunisia
| | - Panagiota Stathopoulou
- Laboratory of Systems Microbiology and Applied Genomics, Department of Sustainable Agriculture, University of Patras, Agrinio, Greece
| | - Daniele Daffonchio
- Biological and Environmental Sciences and Engineering Division (BESE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Ameur Cherif
- BVBGR-LR11ES31, Higher Institute of Biotechnology Sidi Thabet, University of Manouba, Biotechpole Sidi Thabet, Ariana, Tunisia
| | - Hadda-Imene Ouzari
- Laboratory of Microorganisms and Active Biomolecules, LMBA-LR03ES03, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia,*Correspondence: Hadda-Imene Ouzari,
| | - George Tsiamis
- Laboratory of Systems Microbiology and Applied Genomics, Department of Sustainable Agriculture, University of Patras, Agrinio, Greece,George Tsiamis,
| | - Amor Mosbah
- BVBGR-LR11ES31, Higher Institute of Biotechnology Sidi Thabet, University of Manouba, Biotechpole Sidi Thabet, Ariana, Tunisia,Amor Mosbah,
| |
Collapse
|
5
|
Elsayed A, Abdelsattar AM, Heikal YM, El-Esawi MA. Synergistic effects of Azospirillum brasilense and Bacillus cereus on plant growth, biochemical attributes and molecular genetic regulation of steviol glycosides biosynthetic genes in Stevia rebaudiana. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 189:24-34. [PMID: 36041365 DOI: 10.1016/j.plaphy.2022.08.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 07/29/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
The current study aimed to scale up the favorable bio-stimulants for enhancing the growth and breeding strategies of Stevia rebaudiana to increase sugar productivity. Inoculation of 45-day-old S. rebaudiana plantlets with Bacillus cereus and Azospirillum brasilense alone or in combination for 30 days allowed comparisons among their effects on enhancement and improvement of plant growth, production of bioactive compounds and expression of steviol glycoside genes. B. cereus SrAM1 isolated from surface-sterilized Stevia rebaudiana leaves was molecularly identified using 16s rRNA and tested for its ability to promote plant growth. Beneficial endophytic B. cereus SrAM1 induced all plant growth-promoting traits, except solubilization of phosphate, therefore it showed high effectiveness in the promotion of growth and production of bioactive compounds. Treatment of plants with B. cereus SrAM1 alone revealed carbohydrates content of 278.99 mg/g, total soluble sugar of 114.17 mg/g, total phenolics content of 34.05 mg gallic acid equivalent (GAE)/g dry weight) and total antioxidants activity of 32.33 mg (A.A)/g dry weight). Thus, plantlets inoculated with B. cereus SrAM1 alone exhibited the greatest responses in physiological and morphological parameters, but plantlets inoculated with B. cereus SrAM1 + A. brasilense showed a maximal upregulation of genes responsible for the biosynthesis of steviol glycosides (Kaurene oxidase, ent-KO; UDP-dependent glycosyl transferases of UGT85C2, UGT74G1, UGT76G1). Taken together, the used bacterial strains, particularly B. cereus SrAM1 could significantly improve the growth of S. rebaudiana via dynamic interactions in plants.
Collapse
Affiliation(s)
- Ashraf Elsayed
- Botany Department, Faculty of Science, Mansoura University, 35516, Mansoura, Egypt
| | - Amal M Abdelsattar
- Botany Department, Faculty of Science, Mansoura University, 35516, Mansoura, Egypt
| | - Yasmin M Heikal
- Botany Department, Faculty of Science, Mansoura University, 35516, Mansoura, Egypt
| | - Mohamed A El-Esawi
- Botany Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
| |
Collapse
|
6
|
Abstract
Halotolerant plant-growth-promoting rhizobacteria (PGPR) could not only promote plant growth, but also help in counteracting the detrimental effects of salt stress. In the present study, a total of 76 bacteria were isolated from the rhizosphere, non-rhizospheric soil and endophytes of the halophyte Salsola tetrandra, collected from natural saline soils in Algeria. Phylogenetic analysis based on the 16S rDNA sequence of Gram-negative bacteria (n = 51) identified, showed seventeen representative isolates grouped into four genera (Pseudomonas, Acinetobacter, Enterobacter, and Providencia). These bacterial isolates that exhibited different PGPR traits were selected and tested for their ability to tolerate different abiotic stress (NaCl, PEG8000, and pH). The majority of isolates were drought tolerant (60% of PEG8000) and had an optimal growth at high pH values (pH 9 and 11) and some strains tolerated 2 M of NaCl. Strains identified as Enterobacter xiangfangensis BE1, Providencia rettgeri BR5 and Pseudomonas stutzeri MLR6 showed high capacity of adaptation on their PGP traits. The salt-tolerant isolates were finally chosen to promote growth and enhance salt tolerance, separately or combined, of Arabidopsis thaliana (Col-0) exposed or not to 0.1 M NaCl, by following fresh and root weight, primary root elongation and lateral root number. The best bacterial effect was recorded for the MLR6 strain in increasing shoot fresh weight and for BE1 in terms of root fresh weight in the absence of salt stress. At stressed conditions, all growth parameters declined. However, inoculation of Arabidopsis thaliana with the three bacterial strains (MLR6, BE1 and BR5), single or in co-culture, conferred an increase in the shoot weight, primary root length and lateral root number. The use of these strains separately or combined as biofertilizers seems to be a powerful tool in the development of sustainable agriculture in saline soils.
Collapse
|
7
|
Einloft TC, Bolzan de Oliveira P, Radünz LL, Dionello RG. Biocontrol capabilities of three Bacillus isolates towards aflatoxin B1 producer A. flavus in vitro and on maize grains. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.107978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
8
|
Efficiency of plant growth promoting bacteria for growth and yield enhancement of maize ( Zea mays) isolated from rock phosphate reserve area Hazara Khyber Pakhtunkhwa, Pakistan. Saudi J Biol Sci 2021; 28:2316-2322. [PMID: 33911946 PMCID: PMC8071923 DOI: 10.1016/j.sjbs.2021.01.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 12/12/2020] [Accepted: 01/12/2021] [Indexed: 01/19/2023] Open
Abstract
The usage of novel Plant Growth-Promoting Rhizobacteria (PGPR) as bioinoculant is a good opportunity for ecological farming practices to improve soil condition, quality of grain, crops’ yield and biodiversity conservation. The purpose of recent research was focused to examine, isolate and characterize PGP bacteria that colonize the rhizosphere for the duration of the maize plant's seedling. For this purpose, 14 samples of soils and roots in the maize rhizosphere were collected from rock phosphate area of Hazara, Pakistan. Forty morphologically natural bacterial colonies have been extracted and tested for their PGP innovations and biocontrol residences and further recognized as plant production advancing rhizobacteria. To find the effective PGPR strains with numerous activities, an aggregate of 150 bacterial colonies were sequestered from different rhizospheric soils of the Hazara Pakistan rock phosphate area. These tested bacterial strains were subjected to biochemical description and in vitro screening for their plant growth-promoting qualities like generation of indole acetic acid (IAA), alkali (NH3), hydrogen cyanide (HCN), siderophores, catalases, proteases and pectinases. All the isolates of rhizobacteria showed IAA producing capacity, as well as found positive for catalase and HCN. The above results suggested that, in addition to biocontrol marketers, PGPR could be used as biofertilizers to substitute agro-chemicals in order to increase crop production. These microorganisms can therefore be further developed and used for greenhouse and discipline packages.
Collapse
|
9
|
Ali J, Ali F, Ahmad I, Rafique M, Munis MFH, Hassan SW, Sultan T, Iftikhar M, Chaudhary HJ. Mechanistic elucidation of germination potential and growth of Sesbania sesban seedlings with Bacillus anthracis PM21 under heavy metals stress: An in vitro study. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111769. [PMID: 33396087 DOI: 10.1016/j.ecoenv.2020.111769] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/21/2020] [Accepted: 11/30/2020] [Indexed: 05/06/2023]
Abstract
Soils contaminated with heavy metals such as Chromium (Cr) and Cadmium (Cd) severely impede plant growth. Several rhizospheric microorganisms support plant growth under heavy metal stress. In this study, Cr and Cd stress was applied to in vitro germinating seedlings of a Legume plant species, Sesbania sesban, and investigated the plant growth potential in presence and absence of Bacillus anthracis PM21 bacterial strain under heavy metal stress. The seedlings were exposed to different concentrations of Cr (25-75 mg/L) and Cd (100-200 mg/L) in Petri plates. Growth curve analysis of B. anthracis PM21 revealed its potential to adapt Cr and Cd stress. The bacteria supported plant growth by exhibiting ACC-deaminase activity (1.57-1.75 μM of α-ketobutyrate/h/mg protein), producing Indole-3-acetic acid (99-119 μM/mL) and exopolysaccharides (2.74-2.98 mg/mL), under heavy metal stress condition. Analysis of variance revealed significant differences in growth parameters between the seedlings with and without bacterial inoculation in metal stress condition. The combined Cr+Cd stress (75 + 200 mg/L) significantly reduced root length (70%), shoot length (24%), dry weight (54%) and fresh weight (57%) as compared to control. Conversely, B. anthracis PM21 inoculation to seedlings significantly increased (p ≤ 0.05) seed germination percentage (5%), root length (31%), shoot length (23%) and photosynthetic pigments (Chlorophyll a: 20%; Chlorophyll b: 16% and total chlorophyll: 18%), as compared to control seedlings without B. anthracis PM21 inoculation. The B. anthracis PM21 inoculation also enhanced activities of antioxidant enzymes, including superoxide dismutase (52%), peroxidase (66%), and catalase (21%), and decreased proline content (56%), electrolyte leakage (50%), and malondialdehyde concentration (46%) in seedlings. The B. anthracis PM21 inoculated seedlings of S. sesban exhibited significantly high (p ≤ 0.05) tissue deposition of Cr (17%) and Cd (16%) as compared to their control counterparts. Findings of the study suggested that B. anthracis PM21 endured metal stress through homeostasis of antioxidant activities, and positively impacted S. sesban growth and biomass. Further experiments in controlled conditions are necessary for investigating phytoremediation potential of S. sesban in metal-contaminated soils in presence of B. anthracis PM21 bacterial strain.
Collapse
Affiliation(s)
- Javed Ali
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Fawad Ali
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Iftikhar Ahmad
- Department of Environmental Sciences, COMSATS University Islamabad, Vehari-Campus, 61100 Vehari, Pakistan
| | - Mazhar Rafique
- Department of Soil and Climate Sciences, Faculty of Agriculture Sciences, The University of Haripur, Pakistan
| | | | | | - Tariq Sultan
- Soil Biology Program, Land Resources Research Institute, National Agricultural Research Center, Islamabad, Pakistan
| | - Muhammad Iftikhar
- Soil Biology Program, Land Resources Research Institute, National Agricultural Research Center, Islamabad, Pakistan
| | | |
Collapse
|
10
|
Sorokan A, Benkovskaya G, Burkhanova G, Blagova D, Maksimov I. Endophytic Strain Bacillus subtilis 26DCryChS Producing Cry1Ia Toxin from Bacillus thuringiensis Promotes Multifaceted Potato Defense against Phytophthora infestans (Mont.) de Bary and Pest Leptinotarsa decemlineata Say. PLANTS 2020; 9:plants9091115. [PMID: 32872225 PMCID: PMC7570227 DOI: 10.3390/plants9091115] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/07/2020] [Accepted: 08/26/2020] [Indexed: 12/19/2022]
Abstract
Novel properties of a previously obtained Bacillus subtilis 26DCryChS strain are described. The B. subtilis 26DCryChS strain is able to produce Cry1Ia δ-endotoxin from B. thuringiensis B-5351 and to exist in internal plant tissues of potato plants in the same manner as the endophytic B. subtilis 26D source strain (487 ± 53 and 420 ± 63 CFU*103/g, respectively). B. subtilis 26DCryChS, as much as the original B. subtilis 26D strain, inhibited mycelium growth of oomycete Phytophthora infestans (Mont.) de Bary and reduced late blight symptoms development on plants by 35% compared with non-treated ones, as well as showed insecticidal activity against Leptinotarsa decemlineata. Production of the fluorescent GFP protein in the B. subtilis 26D genome allowed visualizing the endophytes around damaged sites on beetle intestines. Bacillus strains under investigation induced systemic resistance to P. infestans and L. decemlineata through the activation of the transcription of PR genes in potato plants. Thus, the B. subtilis 26DCryChS strain was able to induce transcription of jasmonate-dependent genes and acquired the ability to promote transcription of a salicylate-dependent gene (PR1) in plants infected with the late blight agent and damaged by Colorado potato beetle larvae. The B. subtilis 26DCryChS strain could be put forward as a modern approach for biocontrol agents design.
Collapse
|
11
|
Rabhi NEH, Silini A, Cherif-Silini H, Yahiaoui B, Lekired A, Robineau M, Esmaeel Q, Jacquard C, Vaillant-Gaveau N, Clément C, Aït Barka E, Sanchez L. Pseudomonas knackmussii MLR6, a rhizospheric strain isolated from halophyte, enhances salt tolerance in Arabidopsis thaliana. J Appl Microbiol 2018; 125:1836-1851. [PMID: 30142236 DOI: 10.1111/jam.14082] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
AIMS The study aimed for evaluate the efficacy of Pseudomonas knackmussii MLR6 on growth promotion, photosynthetic responses, pigment contents and gene expression of the plant model Arabidopsis thaliana under NaCl stress. METHODS AND RESULTS The strain MLR6 was isolated from the rhizopshere of the halophyte Salsola tetrandra collected from a natural saline Algerian soil. Results showed the ability of MLR6 to induce plant growth promoting traits even under NaCl stress. The inoculation with MLR6 improved the stomatal conductance, the transpiration rate, the total chlorophyll and carotenoids contents under salt stress. It conferred also an increase of fresh/dry weight as well as plant height. MLR6 inoculation further provided a positive effect on cell membrane stability by reducing the electrolyte leakage and priming the ROS accumulation after the salt exposition. Additionally, the expression of NHX1, HKT1, SOS2, and SOS3 as well as SAG13 and PR1 was maintained in MLR6-bacterized plant at a similar level of controls. CONCLUSIONS The inoculation of Arabidopsis thaliana with MLR6 improves plant growth and reduces damages caused by salt stress. SIGNIFICANCE AND IMPACT OF STUDY The use of Pseudomonas knackmussii MLR6 appears as a promising strategy to improve the sustainable agriculture under saline conditions. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Nour El Houda Rabhi
- Laboratoire de Microbiologie Appliquée, Département de Microbiologie, Faculté des Sciences de la Nature et de la Vie, Université Ferhat Abbas, Sétif-1, Algérie
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| | - Allaoua Silini
- Laboratoire de Microbiologie Appliquée, Département de Microbiologie, Faculté des Sciences de la Nature et de la Vie, Université Ferhat Abbas, Sétif-1, Algérie
| | - Hafssa Cherif-Silini
- Laboratoire de Microbiologie Appliquée, Département de Microbiologie, Faculté des Sciences de la Nature et de la Vie, Université Ferhat Abbas, Sétif-1, Algérie
| | - Bilal Yahiaoui
- Laboratoire de Microbiologie Appliquée, Département de Microbiologie, Faculté des Sciences de la Nature et de la Vie, Université Ferhat Abbas, Sétif-1, Algérie
| | - Abdelmalek Lekired
- Laboratoire Microorganismes et Biomolécules Actives LMBA, Université de Tunis El Manar
| | - Mathilde Robineau
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| | - Qassim Esmaeel
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| | - Cédric Jacquard
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| | - Nathalie Vaillant-Gaveau
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| | - Christophe Clément
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| | - Essaïd Aït Barka
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| | - Lisa Sanchez
- Unité de Recherche EA, 4707 Résistance Induite et Bioprotection des Plantes, SFR Condorcet FR CNRS 3417, UFR Sciences Exactes et Naturelles, Université de Reims Champagne-Ardenne, Reims, France
| |
Collapse
|
12
|
Bhise KK, Bhagwat PK, Dandge PB. Synergistic effect of Chryseobacterium gleum sp. SUK with ACC deaminase activity in alleviation of salt stress and plant growth promotion in Triticum aestivum L. 3 Biotech 2017; 7:105. [PMID: 28560646 DOI: 10.1007/s13205-017-0739-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 05/08/2017] [Indexed: 10/19/2022] Open
Abstract
Soil salinity is major abiotic stresses affecting morphological, biochemical and physiological processes of plant growth. Chryseobacterium gleum sp. SUK isolated from salt-stressed soil exhibited ACC (1-aminocyclopropane-1-carboxylate) deaminase activity with IAA (indole acetic acid), siderophore, ammonia, hydrogen cyanide production, 2% salt tolerance and fungal cell wall degrading enzyme production (cellulase, protease). The isolate also showed a poultry feather degrading activity which is the main waste material of poultry industry and opulent source of proteins, amino acids, nitrogen, phosphorous, calcium, potassium, manganese, zinc and copper. Application of feather-degraded lysate with the degrading isolate, C. gleum sp. SUK denotes triple role of bioformulation to surmount salinity stress, management of poultry waste disposal and utilization of feathers degraded products as a biostimulant for better growth of plants as well as strain SUK having multifarious plant growth promoting traits. Wheat crops exposed to salt stressor were inoculated with studied bioformulation. Results of plant analysis showed improvement in root and shoot length, fresh and dry weight, chlorophyll, proteins, amino acids, phenolics, flavonoids content and decreased level of proline. In addition, Na+ uptake was decreased and K+ uptake was increased. Therefore, application of novel bioformulation could increase the yield of crops by ameliorating growth of plants and alleviating the salinity stress.
Collapse
|
13
|
Figueroa-López AM, Cordero-Ramírez JD, Martínez-Álvarez JC, López-Meyer M, Lizárraga-Sánchez GJ, Félix-Gastélum R, Castro-Martínez C, Maldonado-Mendoza IE. Rhizospheric bacteria of maize with potential for biocontrol of Fusarium verticillioides. SPRINGERPLUS 2016; 5:330. [PMID: 27066355 PMCID: PMC4792820 DOI: 10.1186/s40064-016-1780-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 02/12/2016] [Indexed: 11/10/2022]
Abstract
The stalk, ear and root rot (SERR) of maize caused by Fusarium verticillioides (Fv) severely impacts crop production in tropical and subtropical regions. The aim of the present work was to screen bacterial isolates in order to find novel native biocontrol agents against Fv. A culturable bacterial collection consisting of 11,520 isolates enriched in Firmicutes and Proteobacteria was created from rhizosphere samples taken from SERR symptomatic or asymptomatic maize plants. The complete collection was screened for potential activity against Fv using a liquid antagonism assay followed by dual cultures in solid medium, selecting for 42 bacteria (Bacillus, Pseudomonas and Paenibacillus) that inhibit Fv growth (>45 %). In planta assays demonstrated that three Bacillus isolates: B. megaterium (B5), B. cereus sensu lato (B25) and Bacillus sp. (B35) displayed the highest antagonistic activity against Fv. Pot experiments performed in a greenhouse with Bacillus cereus sensu lato B25 confirmed these findings and showed a reduction of Fv disease severity and incidence on plants. Antagonistic activity analysis revealed that these strains produce glucanases, proteases or chitinases, as well as siderophores and auxins and suggests these as possible control mechanisms against Fv.
Collapse
Affiliation(s)
- Alejandro Miguel Figueroa-López
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa (CIIDIR-Unidad Sinaloa), Instituto Politécnico Nacional, Blvd. Juan de Dios Bátiz Paredes No. 250, AP 280. Col. San Joachin, CP 81101 Guasave, Sinaloa Mexico
| | - Jesús Damián Cordero-Ramírez
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa (CIIDIR-Unidad Sinaloa), Instituto Politécnico Nacional, Blvd. Juan de Dios Bátiz Paredes No. 250, AP 280. Col. San Joachin, CP 81101 Guasave, Sinaloa Mexico
| | - Juan Carlos Martínez-Álvarez
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa (CIIDIR-Unidad Sinaloa), Instituto Politécnico Nacional, Blvd. Juan de Dios Bátiz Paredes No. 250, AP 280. Col. San Joachin, CP 81101 Guasave, Sinaloa Mexico
| | - Melina López-Meyer
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa (CIIDIR-Unidad Sinaloa), Instituto Politécnico Nacional, Blvd. Juan de Dios Bátiz Paredes No. 250, AP 280. Col. San Joachin, CP 81101 Guasave, Sinaloa Mexico
| | - Glenda Judith Lizárraga-Sánchez
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa (CIIDIR-Unidad Sinaloa), Instituto Politécnico Nacional, Blvd. Juan de Dios Bátiz Paredes No. 250, AP 280. Col. San Joachin, CP 81101 Guasave, Sinaloa Mexico
| | - Rubén Félix-Gastélum
- Unidad Los Mochis, Depto. de Ciencias Biológicas, Universidad de Occidente, Blvd. Macario Gaxiola y Carr. Internacional s/n, CP 81223 Los Mochis, Sinaloa Mexico
| | - Claudia Castro-Martínez
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa (CIIDIR-Unidad Sinaloa), Instituto Politécnico Nacional, Blvd. Juan de Dios Bátiz Paredes No. 250, AP 280. Col. San Joachin, CP 81101 Guasave, Sinaloa Mexico
| | - Ignacio Eduardo Maldonado-Mendoza
- Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional Unidad Sinaloa (CIIDIR-Unidad Sinaloa), Instituto Politécnico Nacional, Blvd. Juan de Dios Bátiz Paredes No. 250, AP 280. Col. San Joachin, CP 81101 Guasave, Sinaloa Mexico
| |
Collapse
|
14
|
A high-throughput screening assay to identify bacterial antagonists againstFusarium verticillioides. J Basic Microbiol 2013; 54 Suppl 1:S125-33. [DOI: 10.1002/jobm.201200594] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Accepted: 04/24/2013] [Indexed: 11/07/2022]
|
15
|
Chang WT, Chen ML, Wang SL. An antifungal chitinase produced by Bacillus subtilis using chitin waste as a carbon source. World J Microbiol Biotechnol 2009. [DOI: 10.1007/s11274-009-0244-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|