1
|
Zainab N, Glick BR, Bose A, Amna, Ali J, Rehman FU, Paker NP, Rengasamy K, Kamran MA, Hayat K, Munis MFH, Sultan T, Imran M, Chaudhary HJ. Deciphering the mechanistic role of Bacillus paramycoides (PM51) and Bacillus tequilensis (PM52) in bio-sorption and phyto-assimilation of Cadmium via Linum usitatissimum L. Seedlings. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 211:108652. [PMID: 38723488 DOI: 10.1016/j.plaphy.2024.108652] [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: 12/28/2023] [Revised: 04/09/2024] [Accepted: 04/19/2024] [Indexed: 05/26/2024]
Abstract
Three Cd2+ resistant bacterium's minimal inhibition concentrations were assessed and their percentages of Cd2+ accumulation were determined by measurements using an atomic absorption spectrophotometer (AAS). The results revealed that two isolates Bacillus paramycoides (PM51) and Bacillus tequilensis (PM52), identified by 16S rDNA gene sequencing, showed a higher percentage of Cd2+ accumulation i.e., 83.78% and 81.79%, respectively. Moreover, both novel strains can tolerate Cd2+ levels up to 2000 mg/L isolated from district Chakwal. Amplification of the czcD, nifH, and acdS genes was also performed. Batch bio-sorption studies revealed that at pH 7.0, 1 g/L of biomass, and an initial 150 mg/L Cd2+ concentration were the ideal bio-sorption conditions for Bacillus paramycoides (PM51) and Bacillus tequilensis (PM52). The experimental data were fit to Langmuir isotherm measurements and Freundlich isotherm model R2 values of 0.999 for each of these strains. Bio sorption processes showed pseudo-second-order kinetics. The intra-diffusion model showed Xi values for Bacillus paramycoides (PM51) and Bacillus tequilensis (PM52) of 2.26 and 2.23, respectively. Different surface ligands, was investigated through Fourier-transformation infrared spectroscopy (FTIR). The scanning electron microscope SEM images revealed that after Cd2+ adsorption, the cells of both strains became thick, adherent, and deformed. Additionally, both enhanced Linum usitatissimum plant seed germination under varied concentrations of Cd2+ (0 mg/L, 250 mg/L,350 mg/L, and 500 mg/L). Current findings suggest that the selected strains can be used as a sustainable part of bioremediation techniques.
Collapse
Affiliation(s)
- Nida Zainab
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Bernard R Glick
- Department of Biology, University of Water Loo, Ontario, Canada
| | - Arpita Bose
- Department of Biology Washington University in St. Louis (WUSTL), United States
| | - Amna
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan; Department of Botany, Rawalpindi Women University, 6th Road Sattellite Town, Rawalpindi, Pakistan
| | - Javed Ali
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - Fazal Ur Rehman
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan; Tasmanian Institute of Agriculture, New Town Research Laboratories, University of Tasmania, Tasmania, Australia
| | - Najeeba Parre Paker
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | | | - Muhammad Aqeel Kamran
- College of Environmental and Resource Sciences, Zhejiang University Hangzhou China, China
| | - Kashif Hayat
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | | | - Tariq Sultan
- Land Resource Research Institute, NARC, Islamabad, Pakistan
| | - Muhammad Imran
- Department of Plant Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan; Department of Microbiology, Quaid-i-Azam University, Islamabad, Pakistan
| | | |
Collapse
|
2
|
Golaz D, Papenfuhs CK, Bellés-Sancho P, Eberl L, Egli M, Pessi G. RNA-seq analysis in simulated microgravity unveils down-regulation of the beta-rhizobial siderophore phymabactin. NPJ Microgravity 2024; 10:44. [PMID: 38570513 PMCID: PMC10991261 DOI: 10.1038/s41526-024-00391-7] [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: 10/24/2023] [Accepted: 03/25/2024] [Indexed: 04/05/2024] Open
Abstract
Exploiting the symbiotic interaction between crops and nitrogen-fixing bacteria is a simple and ecological method to promote plant growth in prospective extraterrestrial human outposts. In this study, we performed an RNA-seq analysis to investigate the adaptation of the legume symbiont Paraburkholderia phymatum STM815T to simulated microgravity (s0-g) at the transcriptome level. The results revealed a drastic effect on gene expression, with roughly 23% of P. phymatum genes being differentially regulated in s0-g. Among those, 951 genes were upregulated and 858 downregulated in the cells grown in s0-g compared to terrestrial gravity (1 g). Several genes involved in posttranslational modification, protein turnover or chaperones encoding were upregulated in s0-g, while those involved in translation, ribosomal structure and biosynthesis, motility or inorganic ions transport were downregulated. Specifically, the whole phm gene cluster, previously bioinformatically predicted to be involved in the production of a hypothetical malleobactin-like siderophore, phymabactin, was 20-fold downregulated in microgravity. By constructing a mutant strain (ΔphmJK) we confirmed that the phm gene cluster codes for the only siderophore secreted by P. phymatum as assessed by the complete lack of iron chelating activity of the P. phymatum ΔphmJK mutant on chrome azurol S (CAS) agar plates. These results not only provide a deeper understanding of the physiology of symbiotic organisms exposed to space-like conditions, but also increase our knowledge of iron acquisition mechanisms in rhizobia.
Collapse
Affiliation(s)
- Daphné Golaz
- Department of Plant and Microbial biology, University of Zurich, Zurich, Switzerland
| | - Chad K Papenfuhs
- Department of Plant and Microbial biology, University of Zurich, Zurich, Switzerland
| | - Paula Bellés-Sancho
- Department of Plant and Microbial biology, University of Zurich, Zurich, Switzerland
| | - Leo Eberl
- Department of Plant and Microbial biology, University of Zurich, Zurich, Switzerland
| | - Marcel Egli
- School of Engineering and Architecture, Institute of Medical Engineering, Space Biology Group, Lucerne University of Applied Sciences and Arts, Hergiswil, Switzerland
- National Center for Biomedical Research in Space, Innovation Cluster Space and Aviation, University of Zurich, Zurich, Switzerland
| | - Gabriella Pessi
- Department of Plant and Microbial biology, University of Zurich, Zurich, Switzerland.
| |
Collapse
|
3
|
Wang F, Zhao Z, Han Y, Li S, Bi X, Ren S, Pan Y, Wang D, Liu X. The Bacterial and Fungal Compositions in the Rhizosphere of Asarum heterotropoides Fr. Schmidt var. mandshuricum (Maxim.) Kitag. in a Typical Planting Region. Microorganisms 2024; 12:692. [PMID: 38674636 PMCID: PMC11051765 DOI: 10.3390/microorganisms12040692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/28/2024] Open
Abstract
Asarum is a traditional Chinese medicinal plant, and its dried roots are commonly used as medicinal materials. Research into the traits of the bacteria and fungus in the Asarum rhizosphere and how they relate to the potency of medicinal plants is important. During four cropping years and collecting months, we used ITS rRNA gene amplicon and sequencing to assess the population, diversity, and predominant kinds of bacteria and fungus in the rhizosphere of Asarum. HPLC was used to determine the three bioactive ingredients, namely asarinin, aristolochic acid I, and volatile oil. The mainly secondary metabolites of Asarum, relationships between microbial communities, soil physicochemical parameters, and possible influences on microbial communities owing to various cropping years and collecting months were all statistically examined. The cropping years and collecting months affected the abundance and diversity of rhizosphere bacteria and fungi, but the cropping year had a significant impact on the structures and compositions of the bacterial communities. The rhizosphere microorganisms were influenced by both the soil physicochemical properties and enzyme activities. Additionally, this study revealed that Trichoderma was positively correlated with the three bioactive ingredients of Asarum, while Tausonia showed entirely opposite results. Gibberella and Leptosphaeria demonstrated a significantly negative correlation with asarinin and violate oil, but they were weakly correlated with the aristolochic acid I content. This study revealed variations in the Asarum rhizosphere microorganism population, diversity, and dominant types across four cropping years and collecting months. The relationship between Asarum secondary metabolites, the soil physicochemical properties, enzyme activities, and rhizosphere microorganisms was discussed. Our results will guide the exploration of the soil characteristics and rhizosphere microorganisms' structures by regulating the microbial community to enhance Asarum quality.
Collapse
Affiliation(s)
- Fuqi Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China; (F.W.); (Z.Z.)
| | - Zilu Zhao
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China; (F.W.); (Z.Z.)
| | - Yangyang Han
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China; (F.W.); (Z.Z.)
| | - Shiying Li
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xinhua Bi
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Shumeng Ren
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China; (F.W.); (Z.Z.)
| | - Yingni Pan
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China; (F.W.); (Z.Z.)
| | - Dongmei Wang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
| | - Xiaoqiu Liu
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China; (F.W.); (Z.Z.)
| |
Collapse
|
4
|
Atika M, Leila B, Pereira SIA, Castro PML, Ali B. Enhancing Native Plant Establishment in Mine Tailings under Drought Stress Conditions through the Application of Organo-Mineral Amendments and Microbial Inoculants. PLANTS (BASEL, SWITZERLAND) 2024; 13:863. [PMID: 38592869 PMCID: PMC10975093 DOI: 10.3390/plants13060863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/07/2024] [Accepted: 03/15/2024] [Indexed: 04/11/2024]
Abstract
The implementation of phytoremediation strategies under arid and semiarid climates requires the use of appropriate plant species capable of withstanding multiple abiotic stresses. In this study, we assessed the combined effects of organo-mineral amendments and microbial inoculants on the chemical and biological properties of mine tailings, as well as on the growth of native plant species under drought stress conditions. Plants were cultivated in pots containing 1 kg of a mixture of mine tailings and topsoil (i.e., pre-mined superficial soil) in a 60:40 ratio, 6% marble sludge, and 10% sheep manure. Moreover, a consortium of four drought-resistant plant growth-promoting rhizobacteria (PGPR) was inoculated. Three irrigation levels were applied: well-watered, moderate water deficit, and severe water deficit, corresponding to 80%, 45%, and 30% of field capacity, respectively. The addition of topsoil and organo-mineral amendments to mine tailings significantly improved their chemical and biological properties, which were further enhanced by bacterial inoculation and plants' establishment. Water stress negatively impacted enzymatic activities in amended tailings, resulting in a significant decrease in acid and alkaline phosphatases, urease, and dehydrogenase activities. Similar results were obtained for bacteria, fungi, and actinomycete abundance. PGPR inoculation positively influenced the availability of phosphorus, total nitrogen, and organic carbon, while it increased alkaline phosphatase, urease (by about 10%), and dehydrogenase activity (by 50%). The rhizosphere of Peganum harmala showed the highest enzymatic activity and number of culturable microorganisms, especially in inoculated treatments. Severe water deficit negatively affected plant growth, leading to a 40% reduction in the shoot biomass of both Atriplex halimus and Pennisetum setaceum compared to well-watered plants. P. harmala showed greater tolerance to water stress, evidenced by lower decreases observed in root and shoot length and dry weight compared to well-watered plants. The use of bioinoculants mitigated the negative effects of drought on P. harmala shoot biomass, resulting in an increase of up to 75% in the aerial biomass in plants exposed to severe water deficit. In conclusion, the results suggest that the combination of organo-mineral amendments, PGPR inoculation, and P. harmala represents a promising approach to enhance the phytoremediation of metal-polluted soils under semiarid conditions.
Collapse
Affiliation(s)
- Madline Atika
- Laboratoire Bioressources et Sécurité Sanitaire des Aliments, Faculté des Sciences et Techniques, Université Cadi Ayyad, BP 549, Guéliz, Marrakech 40000, Morocco;
| | - Benidire Leila
- Laboratoire Bioressources et Sécurité Sanitaire des Aliments, Faculté des Sciences et Techniques, Université Cadi Ayyad, BP 549, Guéliz, Marrakech 40000, Morocco;
- Ecole Supérieure de Technologie El Kelâa des Sraghna, Université Cadi Ayyad, Route de Béni Mellal Km 8 B.P 104, El Kelaa des Sraghna 43000, Morocco
| | - Sofia I. A. Pereira
- CBQF—Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (S.I.A.P.); (P.M.L.C.)
| | - Paula M. L. Castro
- CBQF—Centro de Biotecnologia e Química Fina, Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (S.I.A.P.); (P.M.L.C.)
| | - Boularbah Ali
- Laboratoire Bioressources et Sécurité Sanitaire des Aliments, Faculté des Sciences et Techniques, Université Cadi Ayyad, BP 549, Guéliz, Marrakech 40000, Morocco;
- Center of Excellence for Soil and Africa Research in Africa, College of Agriculture and Environmental Sciences, Université Mohammed VI Polytechnique (UM6P), Benguerir 43150, Morocco
| |
Collapse
|
5
|
Bennis M, Kaddouri K, Badaoui B, Bouhnik O, Chaddad Z, Perez-Tapia V, Lamin H, Alami S, Lamrabet M, Abdelmoumen H, Bedmar EJ, Missbah El Idrissi M. Plant growth promoting activities of Pseudomonas sp. and Enterobacter sp. isolated from the rhizosphere of Vachellia gummifera in Morocco. FEMS Microbiol Ecol 2023; 99:fiad114. [PMID: 37742210 DOI: 10.1093/femsec/fiad114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 08/22/2023] [Accepted: 09/19/2023] [Indexed: 09/26/2023] Open
Abstract
The Moroccan endemic Vachellia gummifera grows wild under extreme desert conditions. This plant could be used as an alternative fodder for goats, and camels, in order to protect the Argan forests against overgrazing in Central and Southwestern Moroccan semiarid areas. With the aim to improve the V. gummifera population's density in semiarid areas, we proposed its inoculation with performing plant growth-promoting bacteria. Hence, 500 bacteria were isolated from the plant rhizosphere. From these, 291 isolates were retained for plant growth-promoting (PGP) activities assessment. A total of 44 isolates showed the best phosphates solubilization potential, as well as siderophore and auxin production. The combination of REP-PCR (repetitive extragenic palindromic-polymerase chain reaction) fingerprinting, PGP activities, and phenotypic properties, allowed the selection of three strains for the inoculation experiments. The three selected strains' 16S rRNA sequencing showed that they are members of the Enterobacter and Pseudomonas genera. The inoculation with three strains had diverse effects on V. gummifera growth parameters. All single and combined inoculations improved the plant shoot weight by more than 200%, and the root length by up to 139%, while some combinations further improved protein and chlorophyll content, thereby improving the plant's forage value. The three selected strains constitute an effective inoculum for use in the arid and semiarid zones of southern Morocco.
Collapse
Affiliation(s)
- Meryeme Bennis
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Koutar Kaddouri
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Bouabid Badaoui
- Laboratoire de Zoologie et de Biologie Générale, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Omar Bouhnik
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Zohra Chaddad
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Vicente Perez-Tapia
- Departamento de Microbiología del Suelo y Sistemas Simbíoticos Estacíon Experimental del Zaidín, CSIC, Apartado Postal 419, 18008 Granada, Spain
| | - Hanane Lamin
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Soufiane Alami
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Mouad Lamrabet
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Hanaa Abdelmoumen
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| | - Eulogio J Bedmar
- Departamento de Microbiología del Suelo y Sistemas Simbíoticos Estacíon Experimental del Zaidín, CSIC, Apartado Postal 419, 18008 Granada, Spain
| | - Mustapha Missbah El Idrissi
- Equipe de Microbiologie et Biologie Moléculaire, Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, 4 Avenue Ibn Battouta, Agdal, B.P. 1014 RP, Rabat 10080, Morocco
| |
Collapse
|
6
|
Javaid S, Mushtaq S, Mumtaz MZ, Rasool G, Naqqash T, Afzal M, Mushtaq U, Ali HM, Akhtar MFUZ, Abbas G, Li L. Mineral Solubilizing Rhizobacterial Strains Mediated Biostimulation of Rhodes Grass Seedlings. Microorganisms 2023; 11:2543. [PMID: 37894201 PMCID: PMC10609362 DOI: 10.3390/microorganisms11102543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 10/29/2023] Open
Abstract
Minerals play a dynamic role in plant growth and development. However, most of these mineral nutrients are unavailable to plants due to their presence in fixed forms, which causes significant losses in crop production. An effective strategy to overcome this challenge is using mineral solubilizing bacteria, which can convert insoluble forms of minerals into soluble ones that plants can quickly assimilate, thus enhancing their availability in nutrient-depleted soils. The main objective of the present study was to isolate and characterize mineral solubilizing rhizobacteria and to assess their plant growth-promoting potential for Rhodes grass. Twenty-five rhizobacterial strains were isolated on a nutrient agar medium. They were characterized for solubilization of insoluble minerals (phosphate, potassium, zinc, and manganese), indole acetic acid production, enzymatic activities, and various morphological traits. The selected strains were also evaluated for their potential to promote the growth of Rhodes grass seedlings. Among tested strains, eight strains demonstrated strong qualitative and quantitative solubilization of insoluble phosphate. Strain MS2 reported the highest phosphate solubilization index, phosphate solubilization efficiency, available phosphorus concentration, and reduction in medium pH. Among tested strains, 75% were positive for zinc and manganese solubilization, and 37.5% were positive for potassium solubilization. Strain MS2 demonstrated the highest quantitative manganese solubilization, while strains MS7 and SM4 reported the highest solubilization of zinc and potassium through acidifying their respective media. The strain SM4 demonstrated the most increased IAA production in the presence and absence of L-tryptophan. The majority of strains were positive for various enzymes, including urease, catalase protease, and amylase activities. However, these strains were negative for coagulase activity except strains SM7 and MS7. Based on 16S rRNA gene sequencing, six strains, namely, SM2, SM4, SM5, MS1, MS2, and MS4, were identified as Bacillus cereus, while strains SM7 and MS7 were identified as Staphylococcus saprophyticus and Staphylococcus haemolyticus. These strains significantly improved growth attributes of Rhodes grass, such as root length, shoot length, and root and shoot fresh and dry biomasses compared to the uninoculated control group. The present study highlights the significance of mineral solubilizing and enzyme-producing rhizobacterial strains as potential bioinoculants to enhance Rhodes grass growth under mineral-deficient conditions sustainably.
Collapse
Affiliation(s)
- Shaista Javaid
- Institute of Molecular Biology and Biotechnology, The University of Lahore Main Campus, Lahore 54000, Pakistan
| | - Saira Mushtaq
- Institute of Molecular Biology and Biotechnology, The University of Lahore Main Campus, Lahore 54000, Pakistan
| | - Muhammad Zahid Mumtaz
- Institute of Molecular Biology and Biotechnology, The University of Lahore Main Campus, Lahore 54000, Pakistan
| | - Ghulam Rasool
- Institute of Molecular Biology and Biotechnology, The University of Lahore Main Campus, Lahore 54000, Pakistan
| | - Tahir Naqqash
- Institute of Molecular Biology and Biotechnology, Bahauddin Zakariya University, Multan 60800, Pakistan
| | - Maha Afzal
- Institute of Molecular Biology and Biotechnology, The University of Lahore Main Campus, Lahore 54000, Pakistan
| | - Uzma Mushtaq
- Institute of Molecular Biology and Biotechnology, The University of Lahore Main Campus, Lahore 54000, Pakistan
| | - Hayssam M. Ali
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | | | - Ghulam Abbas
- Centre for Climate Research and Development, COMSATS University Islamabad, Islamabad 45550, Pakistan
| | - Lingling Li
- College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China
| |
Collapse
|
7
|
Lu Z, He S, Kashif M, Zhang Z, Mo S, Su G, Du L, Jiang C. Effect of ammonium stress on phosphorus solubilization of a novel marine mangrove microorganism Bacillus aryabhattai NM1-A2 as revealed by integrated omics analysis. BMC Genomics 2023; 24:550. [PMID: 37723472 PMCID: PMC10506230 DOI: 10.1186/s12864-023-09559-z] [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: 02/17/2023] [Accepted: 08/07/2023] [Indexed: 09/20/2023] Open
Abstract
BACKGROUND Phosphorus is one of the essential nutrients for plant growth. Phosphate-solubilizing microorganisms (PSMs) can alleviate available P deficiency and enhance plant growth in an eco-friendly way. Although ammonium toxicity is widespread, there is little understanding about the effect of ammonium stress on phosphorus solubilization (PS) of PSMs. RESULTS In this study, seven PSMs were isolated from mangrove sediments. The soluble phosphate concentration in culture supernatant of Bacillus aryabhattai NM1-A2 reached a maximum of 196.96 mg/L at 250 mM (NH4)2SO4. Whole-genome analysis showed that B. aryabhattai NM1-A2 contained various genes related to ammonium transporter (amt), ammonium assimilation (i.e., gdhA, gltB, and gltD), organic acid synthesis (i.e., ackA, fdhD, and idh), and phosphate transport (i.e., pstB and pstS). Transcriptome data showed that the expression levels of amt, gltB, gltD, ackA and idh were downregulated, while gdhA and fdhD were upregulated. The inhibition of ammonium transporter and glutamine synthetase/glutamate synthase (GS/GOGAT) pathway contributed to reducing energy loss. For ammonium assimilation under ammonium stress, accompanied by protons efflux, the glutamate dehydrogenase pathway was the main approach. More 2-oxoglutarate (2-OG) was induced to provide abundant carbon skeletons. The downregulation of formate dehydrogenase and high glycolytic rate resulted in the accumulation of formic acid and acetic acid, which played key roles in PS under ammonium stress. CONCLUSIONS The accumulation of 2-OG and the inhibition of GS/GOGAT pathway played a key role in ammonium detoxification. The secretion of protons, formic acid and acetic acid was related to PS. Our work provides new insights into the PS mechanism, which will provide theoretical guidance for the application of PSMs.
Collapse
Affiliation(s)
- Zhaomei Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory for Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China
| | - Sheng He
- Guangxi Key Laboratory of Birth Defects Research and Prevention, Guangxi Key Laboratory of Reproductive Health and Birth Defect prevention, Guangxi Zhuang Autonomous Region Women and Children Health Care Hospital, Nanning, 530033, China
| | - Muhammad Kashif
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
- Guangxi Key Laboratory for Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China
| | - Zufan Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Shuming Mo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Guijiao Su
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Linfang Du
- Key Laboratory of Bio-resources and Eco-environment of the Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China.
| | - Chengjian Jiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi University, Nanning, 530004, China.
- Guangxi Key Laboratory for Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, 545006, China.
| |
Collapse
|
8
|
Santiago JM, Kadyampakeni DM, Fox JP, Wright AL, Guzmán SM, Ferrarezi RS, Rossi L. Grapefruit Root and Rhizosphere Responses to Varying Planting Densities, Fertilizer Concentrations and Application Methods. PLANTS (BASEL, SWITZERLAND) 2023; 12:1659. [PMID: 37111884 PMCID: PMC10144146 DOI: 10.3390/plants12081659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 06/19/2023]
Abstract
Huanglongbing (HLB) disease has caused a severe decline in citrus production globally over the past decade. There is a need for improved nutrient regimens to better manage the productivity of HLB-affected trees, as current guidelines are based on healthy trees. The aim of this study was to evaluate the effects of different fertilizer application methods and rates with different planting densities on HLB-affected citrus root and soil health. Plant material consisted of 'Ray Ruby' (Citrus × paradisi) grapefruit trees grafted on 'Kuharske' citrange (Citrus × sinensis × Citrus trifoliata). The study consisted of 4 foliar fertilizer treatments, which included 0×, 1.5×, 3× and 6× the University of Florida Institute of Food and Agriculture (UF/IFAS) recommended guidelines for B, Mn and Zn. Additionally, 2 ground-applied fertilizer treatments were used, specifically controlled-release fertilizer (CRF1): 12-3-14 + B, Fe, Mn and Zn micronutrients at 1× UF/IFAS recommendation, and (CRF2): 12-3-14 + 2× Mg + 3× B, Fe, Mn and Zn micronutrients, with micronutrients applied as sulfur-coated products. The planting densities implemented were low (300 trees ha-1), medium (440 trees ha-1) and high (975 trees ha-1). The CRF fertilizer resulted in greater soil nutrient concentrations through all of the time sampling points, with significant differences in soil Zn and Mn. Grapefruit treated with ground-applied CRF2 and 3× foliar fertilizers resulted in the greatest bacterial alpha and beta diversity in the rhizosphere. Significantly greater abundances of Rhizobiales and Vicinamibacterales were found in the grapefruit rhizosphere of trees treated with 0× UF/IFAS foliar fertilizer compared to higher doses of foliar fertilizers.
Collapse
Affiliation(s)
- John M. Santiago
- Indian River Research and Education Center, Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, Fort Pierce, FL 34945, USA
| | - Davie M. Kadyampakeni
- Citrus Research and Education Center, Soil, Water and Ecosystem Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, Lake Alfred, FL 33850, USA
| | - John-Paul Fox
- Indian River Research and Education Center, Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, Fort Pierce, FL 34945, USA
| | - Alan L. Wright
- Indian River Research and Education Center, Soil, Water and Ecosystem Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, Fort Pierce, FL 34945, USA
| | - Sandra M. Guzmán
- Indian River Research and Education Center, Agricultural and Biological Engineering Department, Institute of Food and Agricultural Sciences, University of Florida, Fort Pierce, FL 34945, USA
| | | | - Lorenzo Rossi
- Indian River Research and Education Center, Horticultural Sciences Department, Institute of Food and Agricultural Sciences, University of Florida, Fort Pierce, FL 34945, USA
| |
Collapse
|
9
|
Liu B, WeiXie L, Deng R, Lei N, Pu S, Li J. Effects of different fertilization methods on Lolium multiflorum Lam. growth and bacterial community in waste slag. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:60538-60551. [PMID: 37036646 DOI: 10.1007/s11356-023-26386-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 03/07/2023] [Indexed: 04/11/2023]
Abstract
Waste slag has low nutrient content, so it has insufficient nutrient cycling and transformation in the soil ecosystem. There are few studies on the application of oligotrophic phosphate-solubilizing bacteria and phosphate (P) fertilizer to improve the properties of waste slags. In this study, three oligotrophic bacterial strains with P solubilizing activity, namely, Bacillus subtilis 2C (7.23 μg/mL), Bacillus subtilis 6C (4.07 μg/mL), and Bacillus safensis 2N (5.05 μg/mL), were isolated from waste slags. In the pot experiment, compared with no application of P fertilizer, inoculation of Bacillus subtilis 2C with a 50% recommended dose of P fertilizer significantly increased the available phosphorus (AP), total phosphorus (TP), and total nitrogen (TN) in slag by 33.16%, 76.70%, and 233.33%, respectively. The N, P uptake and fresh weight of Lolium multiflorum Lam. were significantly improved by 114.15%, 139.02%, and 100%, respectively. The analysis of the bacterial community showed that the application of P fertilizer decreased the diversity and richness of the bacterial community, and with the addition of phosphorus fertilizer and Bacillus subtilis 2C, the bacterial community in the slag developed towards eutrophication. Redundancy analysis (RDA) showed that the TP content in the slag was significantly correlated with the bacterial community (P = 0.001, < 0.01), followed by the TN content. This study on different P fertilizer application methods can provide some basic ideas for improving the performance of waste slag.
Collapse
Affiliation(s)
- Boyu Liu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - LuYao WeiXie
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Ran Deng
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Ningfei Lei
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Shengyan Pu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Jing Li
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China.
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, People's Republic of China.
| |
Collapse
|
10
|
Luo Y, Zhou M, Jin S, Wang Q, Yan D. Changes in phylogenetic structure and species composition of woody plant communities across an elevational gradient in the southern Taihang Mountains, China. Glob Ecol Conserv 2023. [DOI: 10.1016/j.gecco.2023.e02412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
|
11
|
Jofre MF, Mammana SB, Appiolaza ML, Silva MF, Gomez FJV, Cohen AC. Melatonin production by rhizobacteria native strains: Towards sustainable plant growth promotion strategies. PHYSIOLOGIA PLANTARUM 2023; 175:e13852. [PMID: 36628609 DOI: 10.1111/ppl.13852] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/15/2022] [Accepted: 01/04/2023] [Indexed: 06/17/2023]
Abstract
In the current context of climate change and water deficit, the selection of native beneficial microorganisms, such as plant growth-promoting rhizobacteria (PGPR), has become a trend for sustainable agriculture due to their ability to improve plant-bacteria interaction with a minimal adverse effect on the soil microbiota compared to commercial PGPR. Until now, the production of phytohormones like melatonin (MT) by native PGPR and their effect on endogenous MT levels in plants have been poorly studied. MT is a ubiquitous phytohormone that protects plants against biotic and abiotic stress by improving the tolerance of stressed plants. In this work, the production of MT by two native PGPR, Enterobacter 64S1 and Pseudomonas 42P4, was evaluated and both PGPR were applied in Arabidopsis thaliana plants grown under drought conditions to assess the inoculation effects. Parameters such as plant growth, leaf cellular membrane damage, leaf protective compounds, and endogenous MT levels under drought and irrigation conditions were evaluated. The results demonstrated that the native strains Pseudomonas 42P4 and Enterobacter 64S1 produce MT and increase the content of endogenous MT in A. thaliana plants under drought. These native strains improved the tolerance of arabidopsis plants to drought by preventing oxidative and membrane damages and improving plant growth. To the best of our knowledge, this is the first report on MT production by native PGPR and their effects on endogenous MT levels in arabidopsis plants, setting the bases to elucidate the role of native PGPR on water deficit conditions.
Collapse
Affiliation(s)
- María Florencia Jofre
- Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
- Grupo de Química Analítica Verde, Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
- Grupo de Microbiología y Fisiología Agrícola, Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Sabrina B Mammana
- Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
- Grupo de Química Analítica Verde, Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Martín Lopez Appiolaza
- Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - María Fernanda Silva
- Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
- Grupo de Química Analítica Verde, Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Federico José Vicente Gomez
- Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
- Grupo de Química Analítica Verde, Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Ana Carmen Cohen
- Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
- Grupo de Microbiología y Fisiología Agrícola, Instituto de Biología Agrícola de Mendoza (IBAM-CONICET), Facultad de Ciencias Agrarias, Universidad Nacional de Cuyo, Mendoza, Argentina
| |
Collapse
|
12
|
Sun N, Huang L, Zhao H, Zhang N, Lin X, Sun C. Beneficial Bacterium Azospirillum brasilense Induces Morphological, Physiological and Molecular Adaptation to Phosphorus Deficiency in Arabidopsis. PLANT & CELL PHYSIOLOGY 2022; 63:1273-1284. [PMID: 35859341 DOI: 10.1093/pcp/pcac101] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/17/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Although most cultivated soils have high levels of total phosphorus (P), the levels of bioavailable inorganic P (Pi) are insufficient. The application of plant-growth-promoting rhizobacteria (PGPR) is an eco-friendly strategy for P utilization; however, PGPR-mediated plant responses that enhance Pi acquisition remain unexplored. Here, we investigated the effect of Azospirillum brasilense on Arabidopsis adaptation to Pi deficiency. Results showed that A. brasilense inoculation alleviated Pi-deficiency-induced growth inhibition and anthocyanin accumulation and increased the total P content in Arabidopsis plants. A comprehensive analysis of root morphology revealed that A. brasilense increased root hair density and length under Pi-limited conditions. We further demonstrated that A. brasilense enhanced the acid phosphatase activity and upregulated the expression of several Pi transporter genes, such as PHOSPHATE1 (PHO1), PHOSPHATE TRANSPORTER 1:(PHT1:1) and PHT1;4. However, A. brasilense did not enhance the growth o total P content in pht1;1, pht1;4 and pht1;1pht1;4 mutants. Moreover, A. brasilense could not increase the P content and PHT1;1 expression in the root hairless mutant rsl4rsl2, because of the occurrence of low-Pi-induced PHT1;1 and PHT1;4 in root hairs. These results indicate that A. brasilense can promote root hair development and enhance acid phosphatase activity and Pi transporter expression levels, consequently improving the Pi absorption capacity and conferring plant tolerance to Pi deficiency.
Collapse
Affiliation(s)
- Nan Sun
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou, Zhejiang 310058, China
| | - Lin Huang
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou, Zhejiang 310058, China
| | - Hongcheng Zhao
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou, Zhejiang 310058, China
| | - Nan Zhang
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou, Zhejiang 310058, China
| | - Xianyong Lin
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou, Zhejiang 310058, China
| | - Chengliang Sun
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Natural Resource & Environmental Sciences, Zhejiang University, 866 Yuhangtang Rd, Hangzhou, Zhejiang 310058, China
| |
Collapse
|