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Negi R, Sharma B, Jan T, Kaur T, Chowdhury S, Kapoor M, Singh S, Kumar A, Rai AK, Rustagi S, Shreaz S, Kour D, Ahmed N, Kumar K, Yadav AN. Microbial Consortia: Promising Tool as Plant Bioinoculants for Agricultural Sustainability. Curr Microbiol 2024; 81:222. [PMID: 38874817 DOI: 10.1007/s00284-024-03755-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 05/31/2024] [Indexed: 06/15/2024]
Abstract
In the present scenario, growing population demands more food, resulting in the need for sustainable agriculture. Numerous approaches are explored in response to dangers and obstacles to sustainable agriculture. A viable approach is to be exploiting microbial consortium, which generate diverse biostimulants with growth-promoting characteristics for plants. These bioinoculants play an indispensable role in optimizing nutrient uptake efficiency mitigating environmental stress. Plant productivity is mostly determined by the microbial associations that exist at the rhizospheric region of plants. The engineered consortium with multifunctional attributes can be effectively employed to improve crop growth efficacy. A number of approaches have been employed to identify the efficient consortia for plant growth and enhanced crop productivity. Various plant growth-promoting (PGP) microbes with host growth-supporting characteristics were investigated to see if they might work cohesively and provide a cumulative effect for improved growth and crop yield. The effective microbial consortia should be assessed using compatibility tests, pot experimentation techniques, generation time, a novel and quick plant bioassay, and sensitivity to external stimuli (temperature, pH). The mixture of two or more microbial strains found in the root microbiome stimulates plant growth and development. The present review deals with mechanism, formulation, inoculation process, commercialization, and applications of microbial consortia as plant bioinoculants for agricultural sustainability.
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Affiliation(s)
- Rajeshwari Negi
- Department of Genetics, Plant Breeding and Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Babita Sharma
- Department of Microbiology, Akal College of Basic Science, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Tawseefa Jan
- Department of Food Technology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Tanvir Kaur
- Department of Genetics, Plant Breeding and Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Sohini Chowdhury
- Chitkara Center for Research and Development, Chitkara University, Baddi, Himachal Pradesh, India
| | - Monit Kapoor
- Centre of Research Impact and Outcome, Chitkara University, Rajpura, Punjab, India
| | - Sangram Singh
- Department of Biochemistry, Dr. Ram Manohar Lohia Avadh University, Faizabad, Uttar Pradesh, India
| | - Anu Kumar
- University Institute of Biotechnology, Chandigarh University, Mohali, 140413, Punjab, India
| | - Ashutosh Kumar Rai
- Department of Biochemistry, College of Medicine, Imam Abdulrahman Bin Faisal University, Dammam, Kingdom of Saudi Arabia
| | - Sarvesh Rustagi
- Department of Food Technology, School of Applied and Life Sciences, Uttaranchal University, Dehradun, Uttarakhand, India
| | - Sheikh Shreaz
- Environment and Life Sciences Research Center, Kuwait Institute for Scientific Research, PO Box 24885, 13109, Safat, Kuwait
| | - Divjot Kour
- Department of Microbiology, Akal College of Basic Science, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Naseer Ahmed
- Department of Food Technology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Krishan Kumar
- Department of Food Technology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India
| | - Ajar Nath Yadav
- Department of Genetics, Plant Breeding and Biotechnology, Dr. Khem Singh Gill Akal College of Agriculture, Eternal University, Baru Sahib, Sirmaur, 173101, Himachal Pradesh, India.
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Lahmamsi H, Ananou S, Lahlali R, Tahiri A. Lactic acid bacteria as an eco-friendly approach in plant production: Current state and prospects. Folia Microbiol (Praha) 2024; 69:465-489. [PMID: 38393576 DOI: 10.1007/s12223-024-01146-3] [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: 07/25/2023] [Accepted: 01/31/2024] [Indexed: 02/25/2024]
Abstract
Since the late nineteenth century, the agricultural sector has experienced a tremendous increase in chemical use in response to the growing population. Consequently, the intensive and indiscriminate use of these substances caused serious damage on several levels, including threatening human health, disrupting soil microbiota, affecting wildlife ecosystems, and causing groundwater pollution. As a solution, the application of microbial-based products presents an interesting and ecological restoration tool. The use of Plant Growth-Promoting Microbes (PGPM) affected positive production, by increasing its efficiency, reducing production costs, environmental pollution, and chemical use. Among these microbial communities, lactic acid bacteria (LAB) are considered an interesting candidate to be formulated and applied as effective microbes. Indeed, these bacteria are approved by the European Food Safety Authority (EFSA) and Food and Drug Administration (FDA) as Qualified Presumption of Safety statute and Generally Recognized as Safe for various applications. To do so, this review comes as a road map for future research, which addresses the different steps included in LAB formulation as biocontrol, bioremediation, or plant growth promoting agents from the isolation process to their field application passing by the different identification methods and their various uses. The plant application methods as well as challenges limiting their use in agriculture are also discussed.
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Affiliation(s)
- Haitam Lahmamsi
- Laboratoire de Biotechnologie Microbienne et Molécules Bioactives, Faculté des Sciences et Techniques, Université Sidi Mohamed Ben Abdellah, Route Immouzer BP 2202, Fez, Morocco
- Unité de Phytopathologie, Département de Protection des Plantes, Ecole Nationale d'Agriculture, Km10, Rt Haj Kaddour, BP S/40, 50001, Meknes, Morocco
| | - Samir Ananou
- Laboratoire de Biotechnologie Microbienne et Molécules Bioactives, Faculté des Sciences et Techniques, Université Sidi Mohamed Ben Abdellah, Route Immouzer BP 2202, Fez, Morocco
| | - Rachid Lahlali
- Unité de Phytopathologie, Département de Protection des Plantes, Ecole Nationale d'Agriculture, Km10, Rt Haj Kaddour, BP S/40, 50001, Meknes, Morocco.
| | - Abdessalem Tahiri
- Unité de Phytopathologie, Département de Protection des Plantes, Ecole Nationale d'Agriculture, Km10, Rt Haj Kaddour, BP S/40, 50001, Meknes, Morocco.
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Abedi AH, Adhami HR, Mousavi Ghahfarrokhi SS, Mirmasoumi M, Amin M. Bacillus subtilis stimulates plant growth and production of bioactive components in saffron. Nat Prod Res 2024:1-6. [PMID: 38598323 DOI: 10.1080/14786419.2024.2340045] [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: 11/26/2023] [Accepted: 03/26/2024] [Indexed: 04/12/2024]
Abstract
The effects of B. subtilis on the morphology and physiology of saffron were investigated using two types of soils. Three different bacterial suspensions were applied at 14-day intervals to treat saffron. Morphological attributes were recorded, and the amounts of α-crocin and safranal in the stigma extracts were quantified. The longest stigma, petal, and leaf were observed in the treated groups with 105 and 108 cfu/ml. The highest weight of stigma per corm belonged to the treated groups with 102 cfu/ml in unsterile soil and 105 and 108 cfu/ml in sterile soil. Treatment with 102 and 108 cfu/ml caused a significant increase in safranal production in sterile and unsterile peat/perlite. While treatment with 105 and 108 cfu/ml in sterile peat/perlite and exposure to 102 cfu/ml in unsterile peat/perlite soil resulted in an increase in α-crocin. The data showed that B. subtlis triggers the morphological and physiological processes in saffron.
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Affiliation(s)
- Amir-Hossein Abedi
- Faculty of Pharmacy, International Campus, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid-Reza Adhami
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed Sadeq Mousavi Ghahfarrokhi
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
- Pharmaceutical Microbiology Group, Pharmaceutical Quality Assurance Research Center, The Institute of Pharmaceutical Sciences (TIPS, Tehran University of Medical Sciences, Tehran, Iran)
- Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Masoud Mirmasoumi
- School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Mohsen Amin
- Department of Drug and Food Control, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Musa OI, Akande SA, Ijah UJJ, Abioye OP, Maude AM, Samuel JO, Mustapha A, Abdulrahim AM, Gusdanis ACG. Biofilms communities in the soil: characteristic and interactions using mathematical model. Res Microbiol 2024; 175:104149. [PMID: 37923049 DOI: 10.1016/j.resmic.2023.104149] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 10/17/2023] [Accepted: 10/22/2023] [Indexed: 11/07/2023]
Abstract
There are many different kinds of microorganisms in the soil, and many of them are biofilms because they can make supracellular compounds. Surface-associated microorganisms in a biofilm are encased in a hydrated extracellular polymeric substance that aids in adherence and survival. Numerous different kinds of microorganisms call the soil home. Strong interactions with and among species are made possible by biofilms; this, in turn, might increase the effectiveness with which organic compounds and poisons in soil are degraded. This encouraged us to take a close look at soil biofilm ecosystems, which we do in this paper. In this research, we will look at how soil biofilms arise and how that affects the composition of microbial communities and their function in the soil. Recent years have seen an uptick in interest in questions about biofilm structure and the social interactions of various bacteria. Many concepts elucidating the underlying mathematics of biofilm growth are also presented. Since biofilms are so widespread, this breakthrough in soil biofilm inquiry might help scientists understand soil microbiomes better. Mathematical models further extrapolate the relationships between microbial communities and gives a more precise information as to what is happening in a biofilm. Biofilms can help plants cope with a variety of environmental challenges. Soil quality, plant nourishment, plant protection, bioremediation, and climate change are all influenced by the interplay of biofilm communities. Thus, biofilms play an important role in the development of environmentally friendly and sustainable agriculture.
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Affiliation(s)
- Ojeba Innocent Musa
- Department of Microbiology, Skyline University Nigeria, Kano State, Nigeria.
| | | | | | - Olabisi Peter Abioye
- Department of Microbiology, Federal University of Technology, Minna Niger State, Nigeria
| | - Asmau Mohammed Maude
- Department of Microbiology, Federal University of Technology, Minna Niger State, Nigeria
| | - Job Oloruntoba Samuel
- Department of Microbiology, Federal University of Technology, Minna Niger State, Nigeria
| | - Adamu Mustapha
- Department of Microbiology, Federal University of Technology, Minna Niger State, Nigeria
| | - Al-Musbahu Abdulrahim
- Department of Mathematics, Federal University of Technology, Minna Niger State, Nigeria
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Beula Isabel J, Balamurugan A, Renuka Devi P, Periyasamy S. Chitosan-encapsulated microbial biofertilizer: A breakthrough for enhanced tomato crop productivity. Int J Biol Macromol 2024; 260:129462. [PMID: 38237830 DOI: 10.1016/j.ijbiomac.2024.129462] [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: 10/29/2023] [Revised: 01/01/2024] [Accepted: 01/11/2024] [Indexed: 01/21/2024]
Abstract
Encapsulation technology protects the beneficial microorganisms, which are the sources of Nitrogen (N), Phosphorus (P), and Potassium (K), with a carrier material and improves the nutrient uptake from the soil. Pseudomonas fluorescens, gram-negative bacteria, was selected as the microorganism for encapsulation. A chitosan carrier (3 %), a polysaccharide, was chosen for the encapsulation of the bacterial strain to use as biofertilizers by standardization with two carriers, sodium alginate and chitosan. P. fluorescens encapsulated with chitosan showed a higher shelf life than sodium alginate. The shelf life of the encapsulated culture (7 × 1010 CFU/mL) was maintained for ten months. Studies were performed with the encapsulated P. fluorescens to analyze its nature and characteristics. The pot and field studies were conducted with the encapsulated P. fluorescens for the tomato crop. The difference between the treated and control plants was observed based on biometric parameters like shoot length and root length, fruit weight, and number of branches and fruits per plant. This study reveals that encapsulated P. fluorescens improved the yield of the crops. In addition, soil health and fertility were also enhanced. Thus, encapsulated P. fluorescens could be a superior solution for promoting soil health and crop productivity for sustainable agriculture.
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Affiliation(s)
- J Beula Isabel
- Department of Energy and Environment, National Institute of Technology, Tiruchirappalli 620015, India.
| | - A Balamurugan
- Department of Botany, The American College, Madurai 625002, India
| | - P Renuka Devi
- Department of Biotechnology, Anna University Regional Campus, Coimbatore 641046, India
| | - Selvakumar Periyasamy
- Department of Chemical Engineering, School of Mechanical, Chemical and Materials Engineering, Adama Science and Technology University, Adama 1888, Ethiopia; Department of Biomaterials, Saveetha Dental College and Hospitals, SIMATS, Saveetha University, Chennai 600077, India.
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Zhao J, Yu X, Zhang C, Hou L, Wu N, Zhang W, Wang Y, Yao B, Delaplace P, Tian J. Harnessing microbial interactions with rice: Strategies for abiotic stress alleviation in the face of environmental challenges and climate change. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:168847. [PMID: 38036127 DOI: 10.1016/j.scitotenv.2023.168847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 12/02/2023]
Abstract
Rice, which feeds more than half of the world's population, confronts significant challenges due to environmental and climatic changes. Abiotic stressors such as extreme temperatures, drought, heavy metals, organic pollutants, and salinity disrupt its cellular balance, impair photosynthetic efficiency, and degrade grain quality. Beneficial microorganisms from rice and soil microbiomes have emerged as crucial in enhancing rice's tolerance to these stresses. This review delves into the multifaceted impacts of these abiotic stressors on rice growth, exploring the origins of the interacting microorganisms and the intricate dynamics between rice-associated and soil microbiomes. We highlight their synergistic roles in mitigating rice's abiotic stresses and outline rice's strategies for recruiting these microorganisms under various environmental conditions, including the development of techniques to maximize their benefits. Through an in-depth analysis, we shed light on the multifarious mechanisms through which microorganisms fortify rice resilience, such as modulation of antioxidant enzymes, enhanced nutrient uptake, plant hormone adjustments, exopolysaccharide secretion, and strategic gene expression regulation, emphasizing the objective of leveraging microorganisms to boost rice's stress tolerance. The review also recognizes the growing prominence of microbial inoculants in modern rice cultivation for their eco-friendliness and sustainability. We discuss ongoing efforts to optimize these inoculants, providing insights into the rigorous processes involved in their formulation and strategic deployment. In conclusion, this review emphasizes the importance of microbial interventions in bolstering rice agriculture and ensuring its resilience in the face of rising environmental challenges.
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Affiliation(s)
- Jintong Zhao
- Gembloux Agro-Bio Tech, University of Liege, TERRA - Teaching & Research Center, Plant Sciences, 5030 Gembloux, Belgium; Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiaoxia Yu
- School of Water Resources & Environmental Engineering, East China University of Technology, Nanchang, Jiangxi 330000, China
| | - Chunyi Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Sanya Institute, Hainan, Academy of Agricultural Sciences, Sanya 572000, China
| | - Ligang Hou
- Rice Research Institute, Jilin Academy of Agricultural Sciences, Gongzhuling, Jilin 136100, China
| | - Ningfeng Wu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Wei Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yuan Wang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Bin Yao
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Pierre Delaplace
- Gembloux Agro-Bio Tech, University of Liege, TERRA - Teaching & Research Center, Plant Sciences, 5030 Gembloux, Belgium
| | - Jian Tian
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Roy B, Maitra D, Biswas A, Chowdhury N, Ganguly S, Bera M, Dutta S, Golder S, Roy S, Ghosh J, Mitra AK. Efficacy of High-Altitude Biofilm-Forming Novel Bacillus subtilis Species as Plant Growth-Promoting Rhizobacteria on Zea mays L. Appl Biochem Biotechnol 2024; 196:643-666. [PMID: 37171757 DOI: 10.1007/s12010-023-04563-1] [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] [Accepted: 04/26/2023] [Indexed: 05/13/2023]
Abstract
With the global population explosion, the need for increasing crop productivity is reaching its peak. The significance of organic means of cultivation including biofertilizers and biopesticides is undeniable in this context. Over the last few decades, the use of rhizobacteria to induce crop productivity has gained particular interest of researchers. Of these, several Bacillus spp. have been known for their potential plant growth-promoting and phyto-pathogenic actions. Keeping this background in mind, this study was formulated with an aim to unravel the PGPR and phyto-pathogenic potency of Bacillus sp. isolated from extreme environmental conditions, viz. high-altitude waters of Ganges at Gangotri (Basin Extent Longitude Latitude-73° 2' to 89° 5' E 21° 6' to 31° 21' N). Based on recent studies showing the impact of biofilm on bacterial PGPR potency, three novel strains of Bacillus subtilis were isolated on basis of their extremely high biofilm-producing abilities (BRAM_G1: Accession Number MW006633; BRAM_G2: Accession Numbers MT998278-MT998280; BRAM_G3: Accession Number MT998617), and were tested for their PGPR properties like nutrient sequestration, growth hormone production (IAA, GA3), stress-responsive enzyme production (ACC deaminase) and lignocellulolytic and agriculturally important enzyme productions. The strains were further tested for the plethora of metabolites (liquid and VOCs) exuded by them. Finally, the strains both in individually and in an association, i.e. consortium was tested on a test crop, viz. Zea mays L., and the data were collected at regular intervals and the results were statistically analysed. In the present study, the role of high-altitude novel Bacillus subtilis strains as potent PGPR has been analysed statistically.
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Affiliation(s)
- Bedaprana Roy
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India.
| | - Debapriya Maitra
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
| | - Abhik Biswas
- Department of Mathematics, St. Xavier's College (Autonomous), Kolkata, India
| | - Niti Chowdhury
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
| | - Saswata Ganguly
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
| | - Mainak Bera
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
| | - Shijini Dutta
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
| | - Samriddhi Golder
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
| | - Sucharita Roy
- Department of Mathematics, St. Xavier's College (Autonomous), Kolkata, India
| | - Jaydip Ghosh
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
| | - Arup Kumar Mitra
- Department of Microbiology, St. Xavier's College (Autonomous), Kolkata, India
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Khan A, Singh AV, Gautam SS, Agarwal A, Punetha A, Upadhayay VK, Kukreti B, Bundela V, Jugran AK, Goel R. Microbial bioformulation: a microbial assisted biostimulating fertilization technique for sustainable agriculture. FRONTIERS IN PLANT SCIENCE 2023; 14:1270039. [PMID: 38148858 PMCID: PMC10749938 DOI: 10.3389/fpls.2023.1270039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 11/03/2023] [Indexed: 12/28/2023]
Abstract
Addressing the pressing issues of increased food demand, declining crop productivity under varying agroclimatic conditions, and the deteriorating soil health resulting from the overuse of agricultural chemicals, requires innovative and effective strategies for the present era. Microbial bioformulation technology is a revolutionary, and eco-friendly alternative to agrochemicals that paves the way for sustainable agriculture. This technology harnesses the power of potential microbial strains and their cell-free filtrate possessing specific properties, such as phosphorus, potassium, and zinc solubilization, nitrogen fixation, siderophore production, and pathogen protection. The application of microbial bioformulations offers several remarkable advantages, including its sustainable nature, plant probiotic properties, and long-term viability, positioning it as a promising technology for the future of agriculture. To maintain the survival and viability of microbial strains, diverse carrier materials are employed to provide essential nourishment and support. Various carrier materials with their unique pros and cons are available, and choosing the most appropriate one is a key consideration, as it substantially extends the shelf life of microbial cells and maintains the overall quality of the bioinoculants. An exemplary modern bioformulation technology involves immobilizing microbial cells and utilizing cell-free filters to preserve the efficacy of bioinoculants, showcasing cutting-edge progress in this field. Moreover, the effective delivery of bioformulations in agricultural fields is another critical aspect to improve their overall efficiency. Proper and suitable application of microbial formulations is essential to boost soil fertility, preserve the soil's microbial ecology, enhance soil nutrition, and support crop physiological and biochemical processes, leading to increased yields in a sustainable manner while reducing reliance on expensive and toxic agrochemicals. This manuscript centers on exploring microbial bioformulations and their carrier materials, providing insights into the selection criteria, the development process of bioformulations, precautions, and best practices for various agricultural lands. The potential of bioformulations in promoting plant growth and defense against pathogens and diseases, while addressing biosafety concerns, is also a focal point of this study.
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Affiliation(s)
- Amir Khan
- Biofortification Lab, Department of Microbiology, College of Basic Sciences and Humanities, Govind Ballabh Pant University of Agriculture and Technology, U.S. Nagar, Uttarakhand, India
| | - Ajay Veer Singh
- Biofortification Lab, Department of Microbiology, College of Basic Sciences and Humanities, Govind Ballabh Pant University of Agriculture and Technology, U.S. Nagar, Uttarakhand, India
| | - Shiv Shanker Gautam
- Biofortification Lab, Department of Microbiology, College of Basic Sciences and Humanities, Govind Ballabh Pant University of Agriculture and Technology, U.S. Nagar, Uttarakhand, India
| | - Aparna Agarwal
- Biofortification Lab, Department of Microbiology, College of Basic Sciences and Humanities, Govind Ballabh Pant University of Agriculture and Technology, U.S. Nagar, Uttarakhand, India
| | - Arjita Punetha
- School of Environmental Science and Natural Resource, Dehradun, Uttarakhand, India
| | - Viabhav Kumar Upadhayay
- Department of Microbiology, College of Basic Sciences and Humanities, Dr. Rajendra Prasad Central Agriculture University, Samastipur, India
| | - Bharti Kukreti
- Biofortification Lab, Department of Microbiology, College of Basic Sciences and Humanities, Govind Ballabh Pant University of Agriculture and Technology, U.S. Nagar, Uttarakhand, India
| | - Vindhya Bundela
- Biofortification Lab, Department of Microbiology, College of Basic Sciences and Humanities, Govind Ballabh Pant University of Agriculture and Technology, U.S. Nagar, Uttarakhand, India
| | - Arun Kumar Jugran
- G. B. Pant National Institute of Himalayan Environment (GBPNIHE), Garhwal Regional Centre, Srinager, Uttarakhand, India
| | - Reeta Goel
- Department of Biotechnology, Institute of Applied Sciences and Humanities, GLA University, Mathura, Uttar Pradesh, India
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Hezakiel HE, Thampi M, Rebello S, Sheikhmoideen JM. Biopesticides: a Green Approach Towards Agricultural Pests. Appl Biochem Biotechnol 2023:10.1007/s12010-023-04765-7. [PMID: 37994977 DOI: 10.1007/s12010-023-04765-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Biopesticides are biological products or organisms which are potential candidates for eco-friendly pest management and crop protection over the chemical pesticides. The so-called biopesticides include viruses, bacteria, fungi, predators, parasites, and pheromones exhibiting a variety of modes of actions. They are less toxic, rapidly degradable, and more targeted to specific pests. However, it is noted that the formulation of biopesticides plays a crucial link between production and application, and the former dictates economy, longer shelf life, ease of application, and enhanced field efficacy. Moreover, there is an urgent need for organic farmers to gain more proficiency in using biopesticides. Even though biopesticides have more advantages, the main challenge is the marketing of biopesticides. Advances in biopesticide research and development significantly reduce the environmental damage caused by the residues of synthetic insecticides and support sustainable agriculture. Numerous products have been developed since the introduction of biopesticides, some of which have taken the lead in the agro-market after being registered and released. The types of biopesticides; their mode of action; formulation strategies; recent advancements of biopesticides focusing mainly on improvement of its action spectra, to thereby replace chemical pesticides; and finally, the future aspects of biopesticides have been discussed in this review.
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Affiliation(s)
| | - Meenu Thampi
- School of Biosciences, Mahatma Gandhi University, Kottayam, India
| | - Sharrel Rebello
- National Institute of Plant Science Technology, Mahatma Gandhi University, Kottayam, India
| | - Jisha Manakulam Sheikhmoideen
- National Institute of Plant Science Technology, Mahatma Gandhi University, Kottayam, India.
- School of Biosciences, Mahatma Gandhi University, Kottayam, India.
- School of Food Science and Technology, Mahatma Gandhi University, Kottayam, India.
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Sunitha kumari K, Devi SP, Ranjithkumar R, Djearamane S, Tey LH, Wong LS, Kayarohanam S, Arumugam N, Almansour AI, Perumal K. Organic Remobilization of zinc and phosphorus availability to plants by application of mineral solubilizing bacteria Pseudomonas aeruginosa. Heliyon 2023; 9:e22128. [PMID: 38053868 PMCID: PMC10694168 DOI: 10.1016/j.heliyon.2023.e22128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 10/22/2023] [Accepted: 11/05/2023] [Indexed: 12/07/2023] Open
Abstract
Incessant utilization of chemical fertilizers leads to the accumulation of minerals in the soil, rendering them unavailable to plants. Unaware of the mineral reserves present in the soil, farming communities employ chemical fertilizers once during each cultivation, a practice that causes elevated levels of insoluble minerals within the soil. The use of biofertilizers on the other hand, reduces the impact of chemical fertilizers through the action of microorganisms in the product, which dissolves minerals and makes them readily available for plant uptake, helping to create a sustainable environment for continuous agricultural production. In the current investigation, a field trial employing Arachis hypogaea L was conducted to evaluate the ability of Pseudomonas aeruginosa to enhance plant growth and development by solubilizing minerals present in the soil (such as zinc and phosphorus). A Randomized Complete Block Design (RCBD) included five different treatments as T1: Un inoculated Control; T2: Seeds treated with a liquid formulation of P. aeruginosa; T3: Seeds treated with a liquid formulation of P. aeruginosa and the soil amended with organic manure (farmyard); T4: Soil amended with organic manure (farmyard) alone; T5: Seeds treated with lignite (solid) based formulation of P. aeruginosa were used for the study. Efficacy was determined based on the plant's morphological characters and mineral contents (Zn and P) of plants and soil. Survival of P. aeruginosa in the field was validated using Antibiotic Intrinsic patterns (AIP). The results indicated that the combination treatment of P. aeruginosa liquid formulation and organic fertilizer (farmyard) (T3) produced the highest biometric parameters and mineral (Zn and P) content of the groundnut plants and the soil. This outcome is likely attributed to the mineral solubilizing capability of P. aeruginosa. Furthermore, the presence of farmyard manure increased the metabolic activity of P. aeruginosa by inducing its heterotrophic activity, leading to higher mineral content in T3 soil compared to other soil treatments. The AIP data confirmed the presence of the applied liquid inoculant by exhibiting a similar intrinsic pattern between the in vitro isolate and the isolate obtained from the fields. In summary, the Zn and P solubilization ability of P. aeruginosa facilitates the conversion of soil-unavailable mineral form into a form accessible to plants. It further proposes the utilization of the liquid formulation of P. aeruginosa as a viable solution to mitigate the challenges linked to solid-based biofertilizers and the reliance on mineral-based chemical fertilizers.
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Affiliation(s)
- K. Sunitha kumari
- Department of Botany, PSGR Krishnammal College for Women, Peelamedu, Coimbatore-641 004, Tamil Nadu, India
| | - S.N. Padma Devi
- Department of Botany, PSGR Krishnammal College for Women, Peelamedu, Coimbatore-641 004, Tamil Nadu, India
| | | | - Sinouvassane Djearamane
- Biomedical Research Unit and Lab Animal Research Centre, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai 602 105, India
- Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, Kampar 31900, Malaysia
| | - Lai-Hock Tey
- Faculty of Science, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, Kampar 31900, Malaysia
| | - Ling Shing Wong
- Faculty of Health and Life Sciences, INTI International University, Nilai, 71800 Malaysia
| | - Saminathan Kayarohanam
- Faculty of Bioeconomics and Health Sciences, Geomatika University Malaysia, Kuala Lumpur 54200, Malaysia
| | - Natarajan Arumugam
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Abdulrahman I. Almansour
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Karthikeyan Perumal
- Department of Chemistry and Biochemistry, The Ohio State University, 151 W. Woodruff Ave, Columbus, OH 43210, USA
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11
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Afzal A, Khan MY, Zahir ZA, Asghar HN, Muhmood A, Rashid M, Aslam Z, Javed SA, Nadeem SM. Plant growth-promoting bacterial consortia improved the physiology and growth of maize by regulating osmolytes and antioxidants balance under salt-affected field conditions. Heliyon 2023; 9:e17816. [PMID: 37483786 PMCID: PMC10359869 DOI: 10.1016/j.heliyon.2023.e17816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 06/25/2023] [Accepted: 06/28/2023] [Indexed: 07/25/2023] Open
Abstract
This study was undertaken to see how microbial consortia influenced maize development and yield under salt-affected conditions. The efficacy of the pre-isolated bacterial strains Burkholderia phytofirmans, Bacillussubtilis, Enterobacter aerogenes, and Pseudomonas syringae and Pseudomonas fluorescens to decrease the detrimental effects of salt on maize was tested in four distinct combinations using Randomized Complete Block Design with three replicates. The results revealed that these strains were compatible and collaborated synergistically, with an 80% co-aggregation percentage under salt-affected conditions. Following that, these strains were tested for their ability to increase maize growth and yield under salt-affected field conditions. The photosynthetic rate (11-50%), relative water content (10-34%), and grain yield (13-21%) of maize were all increased by these various combinations. However, when Burkholderia phytofirmans, Enterobacter aerogenes and Pseudomonas fluorescens were combined, the greatest increase was seen above the un-inoculated control. Furthermore, as compared to the un-inoculated control, the same combination resulted in a 1.5-fold increase in catalase and a 2.0-fold increase in ascorbate concentration. These findings showed that a multi-strain consortium might boost maize's total yield response as a result of better growth under salt stress.
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Affiliation(s)
- Ali Afzal
- Institute of Soil Chemistry & Environmental Sciences, AARI, Faisalabad, Pakistan
| | | | - Zahir Ahmad Zahir
- Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad, Pakistan
| | - Hafiz Naeem Asghar
- Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad, Pakistan
| | - Atif Muhmood
- Institute of Soil Chemistry & Environmental Sciences, AARI, Faisalabad, Pakistan
| | - Muhammad Rashid
- Institute of Soil Chemistry & Environmental Sciences, AARI, Faisalabad, Pakistan
| | - Zeeshan Aslam
- Institute of Soil Chemistry & Environmental Sciences, AARI, Faisalabad, Pakistan
| | - Syed Ayyaz Javed
- Department of Soil & Environmental Sciences, College of Agriculture, University of Sargodha, Sargodha, Pakistan
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12
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Saberi Riseh R, Gholizadeh Vazvani M, Hassanisaadi M, Thakur VK, Kennedy JF. Use of whey protein as a natural polymer for the encapsulation of plant biocontrol bacteria: A review. Int J Biol Macromol 2023; 234:123708. [PMID: 36806771 DOI: 10.1016/j.ijbiomac.2023.123708] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/07/2023] [Accepted: 02/11/2023] [Indexed: 02/21/2023]
Abstract
Climate changes, drought, the salinity of water and soil, the emergence of new breeds of pests and pathogens, the industrialization of countries, and environmental contamination are among the factors limiting the production of agricultural products. The use of chemicals (in the form of fertilizers, pesticides and fungicides) to enhance products against biotic and abiotic stresses has limitations. To eliminate the effects of agricultural chemicals, synthetic agrochemicals should be replaced with natural substances and useful microorganisms. To be more effective and efficient, plant biocontrol bacteria need a coating layer around themselves to protect them from adverse conditions. Whey protein, a valuable by-product of the cheese industry, is one of the important natural polymers. Due to its high protein content, safety, and biodegradability, whey can have many applications in agriculture and encapsulation of bacteria to resist pests and plant diseases. This compound is a rich source of amino acids that can activate plant defense systems and defense enzymes. Considering the amazing potentialities of formulation whey protein, this review attends to the efficiency of whey protein as coating layers on fruit and vegetables and in the packaging system to increase the shelf life of agricultural products against phytopathogens.
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Affiliation(s)
- Roohallah Saberi Riseh
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, 7718897111 Rafsanjan, Iran.
| | - Mozhgan Gholizadeh Vazvani
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, 7718897111 Rafsanjan, Iran
| | - Mohadeseh Hassanisaadi
- Department of Plant Protection, Faculty of Agriculture, Vali-e-Asr University of Rafsanjan, 7718897111 Rafsanjan, Iran
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research Center, Scotland's Rural College (SRUC), Edinburgh EH9 3JG, UK; School of Engineering, University of Petroleum & Energy Studies (UPES), Dehradun 248007, India; Centre for Research and Development, Chandigarh University, Mohali 140413, Punjab, India.
| | - John F Kennedy
- Chembiotech Laboratories Ltd, WR15 8FF Tenbury Wells, United Kingdom.
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13
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Silverstein MR, Segrè D, Bhatnagar JM. Environmental microbiome engineering for the mitigation of climate change. GLOBAL CHANGE BIOLOGY 2023; 29:2050-2066. [PMID: 36661406 DOI: 10.1111/gcb.16609] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 12/15/2022] [Indexed: 05/28/2023]
Abstract
Environmental microbiome engineering is emerging as a potential avenue for climate change mitigation. In this process, microbial inocula are introduced to natural microbial communities to tune activities that regulate the long-term stabilization of carbon in ecosystems. In this review, we outline the process of environmental engineering and synthesize key considerations about ecosystem functions to target, means of sourcing microorganisms, strategies for designing microbial inocula, methods to deliver inocula, and the factors that enable inocula to establish within a resident community and modify an ecosystem function target. Recent work, enabled by high-throughput technologies and modeling approaches, indicate that microbial inocula designed from the top-down, particularly through directed evolution, may generally have a higher chance of establishing within existing microbial communities than other historical approaches to microbiome engineering. We address outstanding questions about the determinants of inocula establishment and provide suggestions for further research about the possibilities and challenges of environmental microbiome engineering as a tool to combat climate change.
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Affiliation(s)
- Michael R Silverstein
- Bioinformatics Program, Boston University, Boston, Massachusetts, USA
- Biological Design Center, Boston University, Boston, Massachusetts, USA
| | - Daniel Segrè
- Bioinformatics Program, Boston University, Boston, Massachusetts, USA
- Biological Design Center, Boston University, Boston, Massachusetts, USA
- Department of Biology, Boston University, Boston, Massachusetts, USA
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA
- Department of Physics, Boston University, Boston, Massachusetts, USA
| | - Jennifer M Bhatnagar
- Bioinformatics Program, Boston University, Boston, Massachusetts, USA
- Department of Biology, Boston University, Boston, Massachusetts, USA
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14
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Vera Hernández PF, Mendoza Onofre LE, Rosas Cárdenas FDF. Responses of sorghum to cold stress: A review focused on molecular breeding. FRONTIERS IN PLANT SCIENCE 2023; 14:1124335. [PMID: 36909409 PMCID: PMC9996117 DOI: 10.3389/fpls.2023.1124335] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Climate change has led to the search for strategies to acclimatize plants to various abiotic stressors to ensure the production and quality of crops of commercial interest. Sorghum is the fifth most important cereal crop, providing several uses including human food, animal feed, bioenergy, or industrial applications. The crop has an excellent adaptation potential to different types of abiotic stresses, such as drought, high salinity, and high temperatures. However, it is susceptible to low temperatures compared with other monocotyledonous species. Here, we have reviewed and discussed some of the research results and advances that focused on the physiological, metabolic, and molecular mechanisms that determine sorghum cold tolerance to improve our understanding of the nature of such trait. Questions and opportunities for a comprehensive approach to clarify sorghum cold tolerance or susceptibility are also discussed.
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Affiliation(s)
- Pedro Fernando Vera Hernández
- Instituto Politécnico Nacional, Centro de Investigación en Biotecnología Aplicada, Ex-Hacienda San Juan Molino Carretera Estatal Tecuexcomac-Tepetitla, Tlaxcala, Mexico
| | | | - Flor de Fátima Rosas Cárdenas
- Instituto Politécnico Nacional, Centro de Investigación en Biotecnología Aplicada, Ex-Hacienda San Juan Molino Carretera Estatal Tecuexcomac-Tepetitla, Tlaxcala, Mexico
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15
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Microbial-Based Products to Control Soil-Borne Pathogens: Methods to Improve Efficacy and to Assess Impacts on Microbiome. Microorganisms 2023; 11:microorganisms11010224. [PMID: 36677516 PMCID: PMC9867489 DOI: 10.3390/microorganisms11010224] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 12/30/2022] [Accepted: 01/11/2023] [Indexed: 01/17/2023] Open
Abstract
Microbial-based products (either as biopesticide or biofertilizers) have a long history of application, though their use is still limited, mainly due to a perceived low and inconsistent efficacy under field conditions. However, their efficacy has always been compared to chemical products, which have a completely different mechanism of action and production process, following the chemical paradigm of agricultural production. This paradigm has also been applied to regulatory processes, particularly for biopesticides, making the marketing of microbial-based formulations difficult. Increased knowledge about bioinocula behavior after application to the soil and their impact on soil microbiome should foster better exploitation of microbial-based products in a complex environment such as the soil. Moreover, the multifunctional capacity of microbial strains with regard to plant growth promotion and protection should also be considered in this respect. Therefore, the methods utilized for these studies are key to improving the knowledge and understanding of microbial-based product activity and improving their efficacy, which, from farmers' point of view, is the parameter to assess the usefulness of a treatment. In this review, we are thus addressing aspects related to the production and formulation process, highlighting the methods that can be used to evaluate the functioning and impact of microbial-based products on soil microbiome, as tools supporting their use and marketing.
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16
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Paravar A, Piri R, Balouchi H, Ma Y. Microbial seed coating: An attractive tool for sustainable agriculture. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2023; 37:e00781. [PMID: 36655147 PMCID: PMC9841043 DOI: 10.1016/j.btre.2023.e00781] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 12/31/2022] [Accepted: 01/04/2023] [Indexed: 01/06/2023]
Abstract
Seed coating is considered one of the best methods to promote sustainable agriculture where the physical and physiological properties of seeds can be improved to facilitate planting, increase growth indices and alleviate abiotic and biotic stresses. Several methods of seed coating are used to attain good application uniformity and adherence in the seed coating process. Seed coating has been tested in seeds of various plant species with different dimensions, forms, textures, and germination types. Plant beneficial microorganisms (PBM), such as rhizobia, bacteria, and fungi inoculated via seed inoculation can increase seed germination, plant performance and tolerance across biotic (e.g., pathogens and pests) and abiotic stress (e.g., salt, drought, and heavy metals) while reducing the use of agrochemical inputs. In this review, the microbial seed coating process and their ability to increase seed performance and protect plants from biotic and abiotic stresses are well discussed and highlighted in sustainable agricultural systems.
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Affiliation(s)
- Arezoo Paravar
- Department of Crop Production and Plant Breeding, College of Agriculture, Shahed University, Tehran, Iran
| | - Ramin Piri
- Department of Agronomy and Plant Breeding, College of Agriculture, University of Tehran, Tehran, Iran
| | - Hamidreza Balouchi
- Department of Agronomy and Plant Breeding, Faculty of Agriculture, Yasouj University, Yasouj, Iran,Corresponding authors.
| | - Ying Ma
- College of Resources and Environment, Southwest University, Chongqing, China,Corresponding authors.
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17
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Chouyia FE, Ventorino V, Pepe O. Diversity, mechanisms and beneficial features of phosphate-solubilizing Streptomyces in sustainable agriculture: A review. FRONTIERS IN PLANT SCIENCE 2022; 13:1035358. [PMID: 36561447 PMCID: PMC9763937 DOI: 10.3389/fpls.2022.1035358] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
Currently, the use of phosphate (P) biofertilizers among many bioformulations has attracted a large amount of interest for sustainable agriculture. By acting as growth promoters, members of the Streptomyces genus can positively interact with plants. Several studies have shown the great potential of this bacterial group in supplementing P in a soluble, plant-available form by several mechanisms. Furthermore, some P-solubilizing Streptomyces (PSS) species are known as plant growth-promoting rhizobacteria that are able to promote plant growth through other means, such as increasing the availability of soil nutrients and producing a wide range of antibiotics, phytohormones, bioactive compounds, and secondary metabolites other than antimicrobial compounds. Therefore, the use of PSS with multiple plant growth-promoting activities as an alternative strategy appears to limit the negative impacts of chemical fertilizers in agricultural practices on environmental and human health, and the potential effects of these PSS on enhancing plant fitness and crop yields have been explored. However, compared with studies on the use of other gram-positive bacteria, studies on the use of Streptomyces as P solubilizers are still lacking, and their results are unclear. Although PSS have been reported as potential bioinoculants in both greenhouse and field experiments, no PSS-based biofertilizers have been commercialized to date. In this regard, this review provides an overview mainly of the P solubilization activity of Streptomyces species, including their use as P biofertilizers in competitive agronomic practices and the mechanisms through which they release P by solubilization/mineralization, for both increasing P use efficiency in the soil and plant growth. This review further highlights and discusses the beneficial association of PSS with plants in detail with the latest developments and research to expand the knowledge concerning the use of PSS as P biofertilizers for field applications by exploiting their numerous advantages in improving crop production to meet global food demands.
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Affiliation(s)
- Fatima Ezzahra Chouyia
- Department of Biology, Faculty of Sciences and Techniques, Hassan II University, Casablanca, Morocco
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Valeria Ventorino
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
| | - Olimpia Pepe
- Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy
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18
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Rodrigues-dos Santos AS, Rebelo-Romão I, Zhang H, Vílchez JI. Discerning Transcriptomic and Biochemical Responses of Arabidopsis thaliana Treated with the Biofertilizer Strain Priestia megaterium YC4-R4: Boosting Plant Central and Secondary Metabolism. PLANTS (BASEL, SWITZERLAND) 2022; 11:3039. [PMID: 36432768 PMCID: PMC9697256 DOI: 10.3390/plants11223039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 10/26/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
As a response to the current challenges in agriculture, the application of alternatives to a more sustainable management is required. Thus, biofertilizers begin to emerge as a reliable alternative to improve crop development and resistance to stresses. Among other effects on the plant, the use of beneficial strains may cause changes in their metabolic regulation, as in cell wall biogenesis and in nutrient/ion transportation, improving their growth process. Previous works showed that inoculation with the strain Priestia megaterium YC4-R4 effectively promoted vegetative growth of Arabidopsis thaliana Col-0 plants. Hence, the present work recorded a strain-mediated induction of several pathways of the central and secondary metabolism of the plant, as the induction of lipid, cellulose, phenol, and flavonoid biosynthesis, by using transcriptomic and biochemical analyses.
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Affiliation(s)
| | - Inês Rebelo-Romão
- Instituto de Tecnologia Química e Biológica (ITQB)-NOVA Lisboa, 2780-157 Oeiras, Portugal
| | - Huiming Zhang
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Science, Chinese Academy of Sciences, Shanghai 200032, China
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475001, China
| | - Juan Ignacio Vílchez
- Instituto de Tecnologia Química e Biológica (ITQB)-NOVA Lisboa, 2780-157 Oeiras, Portugal
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Science, Chinese Academy of Sciences, Shanghai 200032, China
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19
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Kiruba N JM, Saeid A. An Insight into Microbial Inoculants for Bioconversion of Waste Biomass into Sustainable "Bio-Organic" Fertilizers: A Bibliometric Analysis and Systematic Literature Review. Int J Mol Sci 2022; 23:13049. [PMID: 36361844 PMCID: PMC9656562 DOI: 10.3390/ijms232113049] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 12/31/2023] Open
Abstract
The plant-microbe holobiont has garnered considerable attention in recent years, highlighting its importance as an ecological unit. Similarly, manipulation of the microbial entities involved in the rhizospheric microbiome for sustainable agriculture has also been in the limelight, generating several commercial bioformulations to enhance crop yield and pest resistance. These bioformulations were termed biofertilizers, with the consistent existence and evolution of different types. However, an emerging area of interest has recently focused on the application of these microorganisms for waste valorization and the production of "bio-organic" fertilizers as a result. In this study, we performed a bibliometric analysis and systematic review of the literature retrieved from Scopus and Web of Science to determine the type of microbial inoculants used for the bioconversion of waste into "bio-organic" fertilizers. The Bacillus, Acidothiobacillus species, cyanobacterial biomass species, Aspergillus sp. and Trichoderma sp. were identified to be consistently used for the recovery of nutrients and bioconversion of wastes used for the promotion of plant growth. Cyanobacterial strains were used predominantly for wastewater treatment, while Bacillus, Acidothiobacillus, and Aspergillus were used on a wide variety of wastes such as sawdust, agricultural waste, poultry bone meal, crustacean shell waste, food waste, and wastewater treatment plant (WWTP) sewage sludge ash. Several bioconversion strategies were observed such as submerged fermentation, solid-state fermentation, aerobic composting, granulation with microbiological activation, and biodegradation. Diverse groups of microorganisms (bacteria and fungi) with different enzymatic functionalities such as chitinolysis, lignocellulolytic, and proteolysis, in addition to their plant growth promoting properties being explored as a consortium for application as an inoculum waste bioconversion to fertilizers. Combining the efficiency of such functional and compatible microbial species for efficient bioconversion as well as higher plant growth and crop yield is an enticing opportunity for "bio-organic" fertilizer research.
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Affiliation(s)
- Jennifer Michellin Kiruba N
- Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wroclaw University Science and Technology, 50-373 Wroclaw, Poland
| | - Agnieszka Saeid
- Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wroclaw University Science and Technology, 50-373 Wroclaw, Poland
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20
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Shah G, Fiaz S, Attia KA, Khan N, Jamil M, Abbas A, Yang SH, Jumin T. Indole pyruvate decarboxylase gene regulates the auxin synthesis pathway in rice by interacting with the indole-3-acetic acid-amido synthetase gene, promoting root hair development under cadmium stress. FRONTIERS IN PLANT SCIENCE 2022; 13:1023723. [PMID: 36340357 PMCID: PMC9635337 DOI: 10.3389/fpls.2022.1023723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
This research focused on cadmium (Cd), which negatively affects plant growth and auxin hemostasis. In plants, many processes are indirectly controlled through the expression of certain genes due to the secretion of bacterial auxin, as indole-3-acetic acid (IAA) acts as a reciprocal signaling molecule in plant-microbe interaction. The aim of current studies was to investigate responsible genes in rice for plant-microbe interaction and lateral root development due to the involvement of several metabolic pathways. Studies revealed that GH3-2 interacts with endogenous IAA in a homeostasis manner without directly providing IAA. In rice, indole-3-pyruvate decarboxylase (IPDC) transgenic lines showed a 40% increase in lateral roots. Auxin levels and YUCCA (auxin biosynthesis gene) expression were monitored in osaux1 mutant lines inoculated with Bacillus cereus exposed to Cd. The results showed an increase in root hairs (RHs) and lateral root density, changes in auxin levels, and expression of the YUCCA gene. B. cereus normalizes the oxidative stress caused by Cd due to the accumulation of O 2 - and H2O2 in osaux1 mutant lines. Furthermore, the inoculation of B. cereus increases DR5:GUS expression, indicating that bacterial species have a positive role in auxin regulation. Thus, the current study suggests that B. cereus and IPDC transgenic lines increase the RH development in rice by interacting with IAA synthetase genes in the host plant, alleviating Cd toxicity and enhancing plant defense mechanisms.
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Affiliation(s)
- Gulmeena Shah
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Sajid Fiaz
- Department of Plant Breeding and Genetics, The University of Haripur, Haripur, Pakistan
| | - Kotb A. Attia
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Naeem Khan
- Department of Agronomy, Institute of Food and Agricultural Sciences, Florida University, Gainesville, FL, United States
| | - Muhammad Jamil
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology, Kohat, Pakistan
| | - Adeel Abbas
- Institute of Environment and Ecology, School of Environment and Safety Engineering, Jiangsu University, Zhenjiang, China
| | - Seung Hwan Yang
- Department of Biotechnology, Chonnam National University, Yeosu, South Korea
| | - Tu Jumin
- Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
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21
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De Palma M, Scotti R, D’Agostino N, Zaccardelli M, Tucci M. Phyto-Friendly Soil Bacteria and Fungi Provide Beneficial Outcomes in the Host Plant by Differently Modulating Its Responses through (In)Direct Mechanisms. PLANTS (BASEL, SWITZERLAND) 2022; 11:2672. [PMID: 36297696 PMCID: PMC9612229 DOI: 10.3390/plants11202672] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/08/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
Sustainable agricultural systems based on the application of phyto-friendly bacteria and fungi are increasingly needed to preserve soil fertility and microbial biodiversity, as well as to reduce the use of chemical fertilizers and pesticides. Although there is considerable attention on the potential applications of microbial consortia as biofertilizers and biocontrol agents for crop management, knowledge on the molecular responses modulated in host plants because of these beneficial associations is still incomplete. This review provides an up-to-date overview of the different mechanisms of action triggered by plant-growth-promoting microorganisms (PGPMs) to promote host-plant growth and improve its defense system. In addition, we combined available gene-expression profiling data from tomato roots sampled in the early stages of interaction with Pseudomonas or Trichoderma strains to develop an integrated model that describes the common processes activated by both PGPMs and highlights the host's different responses to the two microorganisms. All the information gathered will help define new strategies for the selection of crop varieties with a better ability to benefit from the elicitation of microbial inoculants.
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Affiliation(s)
- Monica De Palma
- Institute of Biosciences and BioResources, Research Division Portici, National Research Council, 80055 Portici, Italy
| | - Riccardo Scotti
- CREA Research Centre for Vegetable and Ornamental Crops, Via Cavalleggeri 25, 84098 Pontecagnano Faiano (SA), Italy
| | - Nunzio D’Agostino
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
| | - Massimo Zaccardelli
- CREA Research Centre for Vegetable and Ornamental Crops, Via Cavalleggeri 25, 84098 Pontecagnano Faiano (SA), Italy
| | - Marina Tucci
- Institute of Biosciences and BioResources, Research Division Portici, National Research Council, 80055 Portici, Italy
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22
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Aloo BN, Tripathi V, Makumba BA, Mbega ER. Plant growth-promoting rhizobacterial biofertilizers for crop production: The past, present, and future. FRONTIERS IN PLANT SCIENCE 2022; 13:1002448. [PMID: 36186083 PMCID: PMC9523260 DOI: 10.3389/fpls.2022.1002448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 08/26/2022] [Indexed: 06/16/2023]
Abstract
Recent decades have witnessed increased agricultural production to match the global demand for food fueled by population increase. Conventional agricultural practices are heavily reliant on artificial fertilizers that have numerous human and environmental health effects. Cognizant of this, sustainability researchers and environmentalists have increased their focus on other crop fertilization mechanisms. Biofertilizers are microbial formulations constituted of indigenous plant growth-promoting rhizobacteria (PGPR) that directly or indirectly promote plant growth through the solubilization of soil nutrients, and the production of plant growth-stimulating hormones and iron-sequestering metabolites called siderophores. Biofertilizers have continually been studied, recommended, and even successfully adopted for the production of many crops in the world. These microbial products hold massive potential as sustainable crop production tools, especially in the wake of climate change that is partly fueled by artificial fertilizers. Despite the growing interest in the technology, its full potential has not yet been achieved and utilization still seems to be in infancy. There is a need to shed light on the past, current, and future prospects of biofertilizers to increase their understanding and utility. This review evaluates the history of PGPR biofertilizers, assesses their present utilization, and critically advocates their future in sustainable crop production. It, therefore, updates our understanding of the evolution of PGPR biofertilizers in crop production. Such information can facilitate the evaluation of their potential and ultimately pave the way for increased exploitation.
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Affiliation(s)
- Becky N. Aloo
- Department of Biological Sciences, University of Eldoret, Eldoret, Kenya
| | - Vishal Tripathi
- Department of Biotechnology, GLA University, Mathura, Uttar Pradesh, India
| | - Billy A. Makumba
- Department of Biological and Physical Sciences, Moi University, Eldoret, Kenya
| | - Ernest R. Mbega
- Department of Sustainable Agriculture and Biodiversity Conservation, Nelson Mandela African Institution of Science and Technology, Arusha, Tanzania
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Graziano S, Caldara M, Gullì M, Bevivino A, Maestri E, Marmiroli N. A Metagenomic and Gene Expression Analysis in Wheat (T. durum) and Maize (Z. mays) Biofertilized with PGPM and Biochar. Int J Mol Sci 2022; 23:ijms231810376. [PMID: 36142289 PMCID: PMC9499264 DOI: 10.3390/ijms231810376] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/30/2022] [Accepted: 08/31/2022] [Indexed: 11/25/2022] Open
Abstract
Commodity crops, such as wheat and maize, are extremely dependent on chemical fertilizers, a practice contributing greatly to the increase in the contaminants in soil and water. Promising solutions are biofertilizers, i.e., microbial biostimulants that when supplemented with soil stimulate plant growth and production. Moreover, the biofertilizers can be fortified when (i) provided as multifunctional consortia and (ii) combined with biochar with a high cargo capacity. The aim of this work was to determine the molecular effects on the soil microbiome of different biofertilizers and delivery systems, highlight their physiological effects and merge the data with statistical analyses. The measurements of the physiological parameters (i.e., shoot and root biomass), transcriptomic response of genes involved in essential pathways, and characterization of the rhizosphere population were analyzed. The results demonstrated that wheat and maize supplemented with different combinations of selected microbial consortia and biochar have a positive effect on plant growth in terms of shoot and root biomass; the treatments also had a beneficial influence on the biodiversity of the indigenous rhizo-microbial community, reinforcing the connection between microbes and plants without further spreading contaminants. There was also evidence at the transcriptional level of crosstalk between microbiota and plants.
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Affiliation(s)
- Sara Graziano
- Interdepartmental Center SITEIA.PARMA, University of Parma, Parco Area delle Scienze, 43124 Parma, Italy
| | - Marina Caldara
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
| | - Mariolina Gullì
- Interdepartmental Center SITEIA.PARMA, University of Parma, Parco Area delle Scienze, 43124 Parma, Italy
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
| | - Annamaria Bevivino
- Department for Sustainability, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, ENEA Casaccia Research Center, 00123 Rome, Italy
| | - Elena Maestri
- Interdepartmental Center SITEIA.PARMA, University of Parma, Parco Area delle Scienze, 43124 Parma, Italy
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
| | - Nelson Marmiroli
- Interdepartmental Center SITEIA.PARMA, University of Parma, Parco Area delle Scienze, 43124 Parma, Italy
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 11/A, 43124 Parma, Italy
- National Interuniversity Consortium for Environmental Sciences (CINSA), 30123 Venice, Italy
- Correspondence:
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Chitayat Levi L, Rippin I, Ben Tulila M, Galron R, Tuller T. Modulating Gene Expression within a Microbiome Based on Computational Models. BIOLOGY 2022; 11:biology11091301. [PMID: 36138780 PMCID: PMC9495703 DOI: 10.3390/biology11091301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/20/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022]
Abstract
Simple Summary Development of computational biology methodologies has provided comprehensive understanding of the complexity of microbiomes, and the extensive ways in which they influence their environment. This has awakened a new research goal, aiming to not only understand the mechanisms in which microbiomes function, but to actively modulate and engineer them for various purposes. However, current microbiome engineering techniques are usually manually tailored for a specific system and neglect the different interactions between the new genetic information and the bacterial population, turning a blind eye to processes such as horizontal gene transfer, mutations, and other genetic alterations. In this work, we developed a generic computational method to automatically tune the expression of heterologous genes within a microbiome according to given preferences, to allow the functionality of the engineering process to propagate in longer periods of time. This goal was achieved by treating each part of the gene individually and considering long term fitness effects on the environment, providing computational and experimental evidence for this approach. Abstract Recent research in the field of bioinformatics and molecular biology has revealed the immense complexity and uniqueness of microbiomes, while also showcasing the impact of the symbiosis between a microbiome and its host or environment. A core property influencing this process is horizontal gene transfer between members of the bacterial community used to maintain genetic variation. The essential effect of this mechanism is the exposure of genetic information to a wide array of members of the community, creating an additional “layer” of information in the microbiome named the “plasmidome”. From an engineering perspective, introduction of genetic information to an environment must be facilitated into chosen species which will be able to carry out the desired effect instead of competing and inhibiting it. Moreover, this process of information transfer imposes concerns for the biosafety of genetic engineering of microbiomes as exposure of genetic information into unwanted hosts can have unprecedented ecological impacts. Current technologies are usually experimentally developed for a specific host/environment, and only deal with the transformation process itself at best, ignoring the impact of horizontal gene transfer and gene-microbiome interactions that occur over larger periods of time in uncontrolled environments. The goal of this research was to design new microbiome-specific versions of engineered genetic information, providing an additional layer of compatibility to existing engineering techniques. The engineering framework is entirely computational and is agnostic to the selected microbiome or gene by reducing the problem into the following set up: microbiome species can be defined as wanted or unwanted hosts of the modification. Then, every element related to gene expression (e.g., promoters, coding regions, etc.) and regulation is individually examined and engineered by novel algorithms to provide the defined expression preferences. Additionally, the synergistic effect of the combination of engineered gene blocks facilitates robustness to random mutations that might occur over time. This method has been validated using both computational and experimental tools, stemming from the research done in the iGEM 2021 competition, by the TAU group.
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Affiliation(s)
- Liyam Chitayat Levi
- Department of Biomedical Engineering, Tel-Aviv University, Tel Aviv 997801, Israel
| | - Ido Rippin
- Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv 997801, Israel
| | - Moran Ben Tulila
- Department of Biomedical Engineering, Tel-Aviv University, Tel Aviv 997801, Israel
| | - Rotem Galron
- Department of Biomedical Engineering, Tel-Aviv University, Tel Aviv 997801, Israel
| | - Tamir Tuller
- Department of Biomedical Engineering, Tel-Aviv University, Tel Aviv 997801, Israel
- The Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv 997801, Israel
- Correspondence:
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25
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Santos-Díaz A, Uribe-Gutiérrez L, Cruz-Barrera M. High-Throughput Assessments for Storage Stability, In Vitro Release, and Particle Size of Encapsulated Biocontrol Fungi in Hydrogel Beads. Curr Protoc 2022; 2:e486. [PMID: 35792662 DOI: 10.1002/cpz1.486] [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] [Indexed: 06/15/2023]
Abstract
Use of biocontrol fungi (BF) such as Trichoderma spp. minimizes fungicide input and increases both plant nutrition and protection from disease. Thus, the introduction of BF by novel inoculants in crop management is an excellent strategy to promote sustainable antagonism activity. Within these strategies, encapsulation in polymeric matrices such as hydrogel beads will play a prominent role in providing an effective carrier/protector and long-lasting bioproduct. These studies have used biomaterials with tunable physicochemical features, providing differential morphologies, compaction, and disintegration, among other parameters. Aiming at developing bioproducts within polymeric hydrogel beads, viability of encapsulated conidia, storage stability, release of active ingredient, and particle size are essential. However, there are no reports that detail standardized and comprehensive methods to evaluate the characterization of these bioproducts. We describe step-by-step protocols that go from sample preparation to testing the viability and storage stability using vacuum-sealed aluminum foil bags. We also describe a high-throughput in vitro method for quantifying released fungal conidia of BF at different pH values. Finally, the particle size of beads is established by bright-field microscopy. These protocols could be transferable to other biological actives, accessible to researchers in the microbiology and bioengineering communities. © 2022 Wiley Periodicals LLC. Basic Protocol 1: Viability of encapsulated conidia Basic Protocol 2: Study of stability of prototypes under storage Basic Protocol 3: Release profile of encapsulated conidia at different pH conditions Basic Protocol 4: Determination of capsule size.
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Affiliation(s)
- Adriana Santos-Díaz
- Agricultural Microbiology Laboratory, Tibaitatá Research Center, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Mosquera, Colombia
| | - Liz Uribe-Gutiérrez
- Agricultural Microbiology Laboratory, Tibaitatá Research Center, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Mosquera, Colombia
| | - Mauricio Cruz-Barrera
- Bioproducts Department, Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA), Mosquera, Colombia
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Arora S, Murmu G, Mukherjee K, Saha S, Maity D. A Comprehensive Overview of Nanotechnology in Sustainable Agriculture. J Biotechnol 2022; 355:21-41. [PMID: 35752390 DOI: 10.1016/j.jbiotec.2022.06.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/18/2022] [Accepted: 06/19/2022] [Indexed: 10/17/2022]
Abstract
Plant nutrition is crucial in crop productivity and providing food security to the ever-expanding population. Application of chemical/biological fertilizers and pesticides are the mainstays for any agricultural economy. However, there are unintended consequences of using chemical fertilizers and pesticides. The environment and ecological balance are adversely affected by their usage. Biofertilizers and biopesticides counter some undesired environmental effects of chemical fertilizers/pesticides; inspite of some drawbacks associated with their use. The recent developments in nanotechnology offer promise towards sustainable agriculture. Sustainable agriculture involves addressing the concerns about agriculture as well as of the environment. This review briefs about important nanomaterials used in agriculture as nanofertilizers, nanopesticides, and a combination called nanobiofertilizers. Both nanofertilizers and nanopesticides enable slow and sustained release besides their eco-friendly environmental consequences. They can be tailored to specific needs to crop. Nanofertilizers also offer greater stress tolerance and, therefore, of considerable value in the era of climate change. Furthermore, nanofertilizers/nanopesticides are applied in minute amounts, reducing transportation costs associated and thus positively affecting the economy. Their uses extend beyond such as if nanoparticles (NPs) are used at high concentrations; they affect plant pathogens adversely. Polymer-based biodegradable nanofertilizers and nanopesticides offer various benefits. There is also a dark side to the use of nanomaterials in agriculture. Nanotechnology often involves the use of metal/metal oxide nanoparticles, which might get access to human bodies leading to their accumulation through bio-magnification. Although their effects on human health are not known, NPs may reach toxic concentrations in soil and runoff into rivers, and other water bodies with their removal to become a huge economic burden. Nevertheless, a risk-benefit analysis of nanoformulations must be ensured before their application in sustainable agriculture.
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Affiliation(s)
- Smriti Arora
- Department of Biotechnology, University of Petroleum and Energy Studies, Dehradun, Uttarakhand 248007, India
| | - Gajiram Murmu
- Materials Chemistry Department, CSIR-Institute of Minerals & Materials Technology, Bhubaneswar, Odisha 751013, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Koel Mukherjee
- Department of Bioengineering and Biotechnology, Birla Institute of Technology, Mesra, Ranchi, Jharkhand 835215, India
| | - Sumit Saha
- Materials Chemistry Department, CSIR-Institute of Minerals & Materials Technology, Bhubaneswar, Odisha 751013, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Dipak Maity
- Department of Chemical Engineering, University of Petroleum and Energy Studies, Dehradun, Uttarakhand 248007, India.
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27
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Vassileva M, Mocali S, Canfora L, Malusá E, García del Moral LF, Martos V, Flor-Peregrin E, Vassilev N. Safety Level of Microorganism-Bearing Products Applied in Soil-Plant Systems. FRONTIERS IN PLANT SCIENCE 2022; 13:862875. [PMID: 35574066 PMCID: PMC9096872 DOI: 10.3389/fpls.2022.862875] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 03/18/2022] [Indexed: 05/17/2023]
Abstract
The indiscriminate use of chemical fertilizers adversely affects ecological health and soil microbiota provoking loss of soil fertility and greater pathogen and pest presence in soil-plant systems, which further reduce the quality of food and human health. Therefore, the sustainability, circular economy, environmental safety of agricultural production, and health concerns made possible the practical realization of eco-friendly biotechnological approaches like organic matter amendments, biofertilizers, biopesticides, and reuse of agro-industrial wastes by applying novel and traditional methods and processes. However, the advancement in the field of Biotechnology/Agriculture is related to the safety of these microorganism-bearing products. While the existing regulations in this field are well-known and are applied in the preparation and application of waste organic matter and microbial inoculants, more attention should be paid to gene transfer, antibiotic resistance, contamination of the workers and environment in farms and biotech-plants, and microbiome changes. These risks should be carefully assessed, and new analytical tools and regulations should be applied to ensure safe and high-quality food and a healthy environment for people working in the field of bio-based soil amendments.
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Affiliation(s)
- Maria Vassileva
- Department of Chemical Engineering, Institute of Biotechnology, University of Granada, Granada, Spain
| | - Stefano Mocali
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Loredana Canfora
- Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Rome, Italy
| | - Eligio Malusá
- Research Institute of Horticulture, Skierniewice, Poland
- Council for Agricultural Research and Economics, Center for Viticulture and Enology, Conegliano, Italy
| | | | - Vanessa Martos
- Department of Plant Physiology, University of Granada, Granada, Spain
| | - Elena Flor-Peregrin
- Department of Chemical Engineering, Institute of Biotechnology, University of Granada, Granada, Spain
| | - Nikolay Vassilev
- Department of Chemical Engineering, Institute of Biotechnology, University of Granada, Granada, Spain
- Institute of Biotechnology, University of Granada, Granada, Spain
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28
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Seed-Encapsulation of Desiccation-Tolerant Microorganisms for the Protection of Maize from Drought: Phenotyping Effects of a New Dry Bioformulation. PLANTS 2022; 11:plants11081024. [PMID: 35448752 PMCID: PMC9024790 DOI: 10.3390/plants11081024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/06/2022] [Accepted: 04/07/2022] [Indexed: 11/20/2022]
Abstract
Droughts and high temperatures deeply affect crop production. The use of desiccation-tolerant (or xerotolerant) microorganisms able to protect plants from droughts represents a promising alternative. These xerotolerant microorganisms have previously been used to modulate plant responses and improve their tolerance to drought. In addition, these microorganisms could be stored and used in dry formats, which would improve their viability and resilience at a much lower cost than current market alternatives. In the present study we analyze the possibility of using strains of xerotolerant Actinobacteria in encapsulated format on seeds. Under this formulation, we carried out greenhouse with farming soil with maize plants. Under greenhouse conditions, the plants showed greater resistance to drought, as well as increased growth and production yield, but not as well in field trials. This alternative could represent a useful tool to improve water efficiency in crops for drought-affected areas or affected by water scarcity.
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29
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Biocontrol Methods in Avoidance and Downsizing of Mycotoxin Contamination of Food Crops. Processes (Basel) 2022. [DOI: 10.3390/pr10040655] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
By increasing the resistance of seeds against abiotic and biotic stress, the possibility of cereal mold contamination and hence the occurrence of secondary mold metabolites mycotoxins decreases. The use of biological methods of seed treatment represents a complementary strategy, which can be implemented as an environmental-friendlier approach to increase the agricultural sustainability. Whereas the use of resistant cultivars helps to reduce mold growth and mycotoxin contamination at the very beginning of the production chain, biological detoxification of cereals provides additional weapons against fungal pathogens in the later stage. Most efficient techniques can be selected and combined on an industrial scale to reduce losses and boost crop yields and agriculture sustainability, increasing at the same time food and feed safety. This paper strives to emphasize the possibility of implementation of biocontrol methods in the production of resistant seeds and the prevention and reduction in cereal mycotoxin contamination.
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30
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Duan Y, Zhao L, Jiang W, Chen R, Zhang R, Chen X, Yin C, Mao Z. The Phlorizin-Degrading Bacillus licheniformis XNRB-3 Mediates Soil Microorganisms to Alleviate Apple Replant Disease. Front Microbiol 2022; 13:839484. [PMID: 35308362 PMCID: PMC8927668 DOI: 10.3389/fmicb.2022.839484] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/24/2022] [Indexed: 11/25/2022] Open
Abstract
In this study, an endophytic phlorizin-degrading Bacillus licheniformis XNRB-3 was isolated from the root tissue of healthy apple trees, and its control effect on apple replant disease (ARD) and how it alleviates the pathogen pressure via changes in soil microbiomes were studied. The addition of strain XNRB-3 in Fusarium infested soils significantly reduced the number of pathogens in the soil, thus resulting in a lower disease incidence, and the relative control effect on Fusarium oxysporum reached the highest of 66.11%. The fermentation broth can also protect the roots of the plants from Fusarium oxysporum, Fusarium moniliforme, Fusarium proliferatum, and Fusarium solani infection. These antagonistic effects were further validated using an in vitro assay in which the pathogen control was related to growth and spore germination inhibition via directly secreted antimicrobial substances and indirectly affecting the growth of pathogens. The secreted antimicrobial substances were identified using gas chromatography-mass spectrometry (GC-MS) technology. Among them, alpha-bisabolol and 2,4-di-tert-butylphenol had significant inhibitory effects on many planted pathogenic fungi. Butanedioic acid, monomethyl ester, and dibutyl phthalate promoted root development of Arabidopsis plants. Strain XNRB-3 has multifarious plant growth promoting traits and antagonistic potential. In pot and field experiments, the addition of strain XNRB-3 significantly promoted the growth of plants, and the activity of enzymes related to disease resistance [superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT)] was also significantly enhanced. It also reduced the abundance of four species of Fusarium and the content of phenolic acids in the rhizosphere soil, improved soil microbial community structure and nutritional conditions, and increased soil microbial diversity and activity, as well as the soil enzyme activity. The above results indicated that B. licheniformis XNRB-3 could be developed into a promising biocontrol and plant-growth-promoting agent.
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Affiliation(s)
| | | | | | | | | | | | - Chengmiao Yin
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
| | - Zhiquan Mao
- National Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Shandong, China
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Agake SI, Plucani do Amaral F, Yamada T, Sekimoto H, Stacey G, Yokoyama T, Ohkama-Ohtsu N. Plant Growth-promoting Effects of Viable and Dead Spores of Bacillus pumilus TUAT1 on Setaria viridis. Microbes Environ 2022; 37. [PMID: 35082177 PMCID: PMC8958298 DOI: 10.1264/jsme2.me21060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Spores are a stress-resistant form of Bacillus spp., which include species that are plant growth-promoting rhizobacteria (PGPR). Previous studies showed that the inoculation of plants with vegetative cells or spores exerted different plant growth-promoting effects. To elucidate the spore-specific mechanism, we compared the effects of viable vegetative cells, autoclaved dead spores, and viable spores of Bacillus pumilus TUAT1 inoculated at 107 CFU plant–1 on the growth of the C4 model plant, Setaria viridis A10.1. B. pumilus TUAT1 spores exerted stronger growth-promoting effects on Setaria than on control plants 14 days after the inoculation. Viable spores increased shoot weight, root weight, shoot length, root length, and nitrogen uptake efficiency 21 days after the inoculation. These increases involved primary and crown root formation. Additionally, autoclaved dead spores inoculated at 108 or 109 CFU plant–1 had a positive impact on crown root differentiation, which increased total lateral root length, resulting in a greater biomass and more efficient nitrogen uptake. The present results indicate that an inoculation with viable spores of B. pumilus TUAT1 is more effective at enhancing the growth of Setaria than that with vegetative cells. The plant response to dead spores suggests that the spore-specific plant growth-promoting mechanism is at least partly independent of symbiotic colonization.
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Affiliation(s)
- Shin-Ichiro Agake
- United Graduated School of Agriculture, Tokyo University of Agriculture and Technology
| | | | - Tetsuya Yamada
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology.,Institute of Agriculture, Tokyo University of Agriculture and Technology
| | | | - Gary Stacey
- Divisions of Plant Science and Technology and Biochemistry, University of Missouri
| | | | - Naoko Ohkama-Ohtsu
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology.,Institute of Agriculture, Tokyo University of Agriculture and Technology
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33
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Cardarelli M, Woo SL, Rouphael Y, Colla G. Seed Treatments with Microorganisms Can Have a Biostimulant Effect by Influencing Germination and Seedling Growth of Crops. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11030259. [PMID: 35161239 PMCID: PMC8838022 DOI: 10.3390/plants11030259] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/13/2022] [Accepted: 01/15/2022] [Indexed: 05/31/2023]
Abstract
Seed quality is an important aspect of the modern cultivation strategies since uniform germination and high seedling vigor contribute to successful establishment and crop performance. To enhance germination, beneficial microbes belonging to arbuscular mycorrhizal fungi, Trichoderma spp., rhizobia and other bacteria can be applied to seeds before sowing via coating or priming treatments. Their presence establishes early relationships with plants, leading to biostimulant effects such as plant-growth enhancement, increased nutrient uptake, and improved plant resilience to abiotic stress. This review aims to highlight the most significant results obtained for wheat, maize, rice, soybean, canola, sunflower, tomato, and other horticultural species. Beneficial microorganism treatments increased plant germination, seedling vigor, and biomass, as well as overcoming seed-related limitations (such as abiotic stress), both during and after emergence. The results are generally positive, but variable, so more scientific information needs to be acquired for different crops and cultivation techniques, with considerations to different beneficial microbes (species and strains) and under variable climate conditions to understand the effects of seed treatments.
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Affiliation(s)
- Mariateresa Cardarelli
- Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, 01100 Viterbo, Italy;
| | - Sheridan L. Woo
- BAT Center-Interuniversity Center for Studies on Bioinspired Agro-Environmental Technology, University of Naples Federico II, 80055 Portici, Italy;
- Department of Pharmacy, University of Naples Federico II, 80131 Napoli, Italy
- Task Force on Microbiome Studies, University of Naples Federico II, 80055 Portici, Italy
| | - Youssef Rouphael
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy;
| | - Giuseppe Colla
- Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, 01100 Viterbo, Italy;
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Effects of Bacillus amyloliquefaciens QSB-6 on the Growth of Replanted Apple Trees and the Soil Microbial Environment. HORTICULTURAE 2022. [DOI: 10.3390/horticulturae8010083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Apple replant disease (ARD), caused largely by soil-borne fungal pathogens, has seriously hindered the development of the apple industry. The use of antagonistic microorganisms has been confirmed as a low-cost and environmentally friendly means of controlling ARD. In the present study, we assessed the effects of Bacillus amyloliquefaciens QSB-6 on the growth of replanted apple saplings and the soil microbial environment under field conditions, thus providing a theoretical basis for the successful use of microbial biocontrol agents. Four treatments were implemented in three apple orchards: untreated replant soil (CK1), methyl bromide fumigation (CK2), blank carrier treatment (T1), and QSB-6 bacterial fertilizer treatment (T2). The plant height, ground diameter, and branch length of apple saplings treated with T2 in three replanted apple orchards were significantly higher than that of the CK1 treatment. Compared with the other treatments, T2 significantly increased the number of soil bacteria, the proportion of actinomycetes, and the activities of soil enzymes. By contrast, compared with the CK1 treatments, the phenolic acid content, the number of fungi, and the abundance of Fusarium oxysporum, Fusarium moniliforme, Fusarium proliferatum, and Fusarium solani in the soil were significantly reduced. PCoA and cluster analysis showed that soil inoculation with strain QSB-6 significantly decreased the Mcintosh and Brillouin index of soil fungi and increased the diversity of soil bacteria in T2 relative to CK1. The soil bacterial community structure in T2 was different from the other treatments, and the soil fungal communities of T2 and CK2 were similar. In summary, QSB-6 bacterial fertilizer shows promise as a potential bio-inoculum for the control of ARD.
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Kumar S, Diksha, Sindhu SS, Kumar R. Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability. CURRENT RESEARCH IN MICROBIAL SCIENCES 2022; 3:100094. [PMID: 35024641 PMCID: PMC8724949 DOI: 10.1016/j.crmicr.2021.100094] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 12/09/2021] [Accepted: 12/09/2021] [Indexed: 01/02/2023] Open
Abstract
Agriculture plays an important role in a country's economy. In modern intensive agricultural practices, chemical fertilizers and pesticides are applied on large scale to increase crop production in order to meet the nutritional requirements of the ever-increasing world population. However, rapid urbanization with shrinking agricultural lands, dramatic change in climatic conditions and extensive use of agrochemicals in agricultural practices has been found to cause environmental disturbances and public health hazards affecting food security and sustainability in agriculture. Besides this, agriculture soils are continuously losing their quality and physical properties as well as their chemical (imbalance of nutrients) and biological health due to indiscriminate use of agrochemicals. Plant-associated microbes with their plant growth- promoting traits have enormous potential to solve these challenges and play a crucial role in enhancing plant biomass and crop yield under greenhouse and field conditions. The beneficial mechanisms of plant growth improvement include enhanced availability of nutrients (i.e., N, P, K, Zn and S), phytohormone modulation, biocontrol of phytopathogens and amelioration of biotic and abiotic stresses. This plant-microbe interplay is indispensable for sustainable agriculture and these microbes may perform essential role as an ecological engineer to reduce the use of chemical fertilizers. Various steps involved for production of solid-based or liquid biofertilizer formulation include inoculum preparation, addition of cell protectants such as glycerol, lactose, starch, a good carrier material, proper packaging and best delivery methods. In addition, recent developments of formulation include entrapment/microencapsulation, nano-immobilization of microbial bioinoculants and biofilm-based biofertilizers. Thus, inoculation with beneficial microbes has emerged as an innovative eco-friendly technology to feed global population with available resources. This review critically examines the current state-of-art on use of microbial strains as biofertilizers in different crop systems for sustainable agriculture and in maintaining soil fertility and enhancing crop productivity. It is believed that acquisition of advanced knowledge of plant-PGPR interactions, bioengineering of microbial communities to improve the performance of biofertilizers under field conditions, will help in devising strategies for sustainable, environment-friendly and climate smart agricultural technologies to deliver short and long terms solutions for improving crop productivity to feed the world in a more sustainable manner.
Modern intensive agricultural practices face numerous challenges that pose major threats to global food security. In order to address the nutritional requirements of the ever-increasing world population, chemical fertilizers and pesticides are applied on large scale to increase crop production. However, the injudicious use of agrochemicals has resulted in environmental pollution leading to public health hazards. Moreover, agriculture soils are continuously losing their quality and physical properties as well as their chemical (imbalance of nutrients) and biological health. Plant-associated microbes with their plant growth- promoting traits have enormous potential to solve these challenges and play a crucial role in enhancing plant biomass and crop yield. The beneficial mechanisms of plant growth improvement include enhanced nutrient availability, phytohormone modulation, biocontrol of phytopathogens and amelioration of biotic and abiotic stresses. Solid-based or liquid bioinoculant formulation comprises inoculum preparation, addition of cell protectants such as glycerol, lactose, starch, a good carrier material, proper packaging and best delivery methods. Recent developments of formulation include entrapment/microencapsulation, nano-immobilization of microbial bioinoculants and biofilm-based biofertilizers. This review critically examines the current state-of-art on use of microbial strains as biofertilizers and the important roles performed by these beneficial microbes in maintaining soil fertility and enhancing crop productivity.
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Key Words
- ABA, Abscisic acid
- ACC, 1-aminocyclopropane-1-carboxylic acid
- AM, Arbuscular mycorrhiza
- APX, Ascorbate peroxidase
- BGA, Blue green algae
- BNF, Biological nitrogen fixation
- Beneficial microorganisms
- Biofertilizers
- CAT, Catalase
- Crop production
- DAPG, 2, 4-diacetyl phloroglucinol
- DRB, Deleterious rhizospheric bacteria
- GA, Gibberellic acid
- GPX, Glutathione/thioredoxin peroxidase
- HCN, Hydrogen cyanide
- IAA, Indole acetic acid
- IAR, Intrinsic antibiotic resistance
- ISR, Induced systemic resistance
- KMB, Potassium mobilizing bacteria
- KSMs, Potassium-solubilizing microbes
- MAMPs, Microbes associated molecular patterns
- PAMPs, Pathogen associated molecular patterns
- PCA, Phenazine-1-carboxylic acid
- PGP, Plant growth-promoting
- PGPR, Plant growth-promoting rhizobacteria
- POD, Peroxidase
- PSB, Phosphate-solubilizing bacteria
- Rhizosphere
- SAR, Systemic acquired resistance
- SOB, Sulphur oxidizing bacteria
- Soil fertility
- Sustainable agriculture
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Affiliation(s)
- Satish Kumar
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, India
| | - Diksha
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, India
| | - Satyavir S Sindhu
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, India
| | - Rakesh Kumar
- Department of Microbiology, CCS Haryana Agricultural University, Hisar 125004, India
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Maitra S, Brestic M, Bhadra P, Shankar T, Praharaj S, Palai JB, Shah MMR, Barek V, Ondrisik P, Skalický M, Hossain A. Bioinoculants-Natural Biological Resources for Sustainable Plant Production. Microorganisms 2021; 10:51. [PMID: 35056500 PMCID: PMC8780112 DOI: 10.3390/microorganisms10010051] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 12/21/2021] [Accepted: 12/23/2021] [Indexed: 11/22/2022] Open
Abstract
Agricultural sustainability is of foremost importance for maintaining high food production. Irresponsible resource use not only negatively affects agroecology, but also reduces the economic profitability of the production system. Among different resources, soil is one of the most vital resources of agriculture. Soil fertility is the key to achieve high crop productivity. Maintaining soil fertility and soil health requires conscious management effort to avoid excessive nutrient loss, sustain organic carbon content, and minimize soil contamination. Though the use of chemical fertilizers have successfully improved crop production, its integration with organic manures and other bioinoculants helps in improving nutrient use efficiency, improves soil health and to some extent ameliorates some of the constraints associated with excessive fertilizer application. In addition to nutrient supplementation, bioinoculants have other beneficial effects such as plant growth-promoting activity, nutrient mobilization and solubilization, soil decontamination and/or detoxification, etc. During the present time, high energy based chemical inputs also caused havoc to agriculture because of the ill effects of global warming and climate change. Under the consequences of climate change, the use of bioinputs may be considered as a suitable mitigation option. Bioinoculants, as a concept, is not something new to agricultural science, however; it is one of the areas where consistent innovations have been made. Understanding the role of bioinoculants, the scope of their use, and analysing their performance in various environments are key to the successful adaptation of this technology in agriculture.
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Affiliation(s)
- Sagar Maitra
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | - Marian Brestic
- Department of Plant Physiology, Slovak University of Agriculture, Tr. A. Hlinku 2, 949 01 Nitra, Slovakia;
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food, and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague, Czech Republic;
| | - Preetha Bhadra
- Department of Biotechnology, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India;
| | - Tanmoy Shankar
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | - Subhashisa Praharaj
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | - Jnana Bharati Palai
- Department of Agronomy, M.S. Swaminathan School of Agriculture, Centurion University of Technology and Management, Paralakheundi 761 211, India; (S.M.); (T.S.); (S.P.); (J.B.P.)
| | | | - Viliam Barek
- Department of Water Resources and Environmental Engineering, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 949 01 Nitra, Slovakia;
| | - Peter Ondrisik
- Department of Plant Physiology, Slovak University of Agriculture, Tr. A. Hlinku 2, 949 01 Nitra, Slovakia;
| | - Milan Skalický
- Department of Botany and Plant Physiology, Faculty of Agrobiology, Food, and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague, Czech Republic;
| | - Akbar Hossain
- Bangladesh Wheat and Maize Research Institute, Dinajpur 5200, Bangladesh;
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Plant Tolerance to Drought Stress in the Presence of Supporting Bacteria and Fungi: An Efficient Strategy in Horticulture. HORTICULTURAE 2021. [DOI: 10.3390/horticulturae7100390] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Increasing temperature leads to intensive water evaporation, contributing to global warming and consequently leading to drought stress. These events are likely to trigger modifications in plant physiology and microbial functioning due to the altered availability of nutrients. Plants exposed to drought have developed different strategies to cope with stress by morphological, physiological, anatomical, and biochemical responses. First, visible changes influence plant biomass and consequently limit the yield of crops. The presented review was undertaken to discuss the impact of climate change with respect to drought stress and its impact on the performance of plants inoculated with plant growth-promoting microorganisms (PGPM). The main challenge for optimal performance of horticultural plants is the application of selected, beneficial microorganisms which actively support plants during drought stress. The most frequently described biochemical mechanisms for plant protection against drought by microorganisms are the production of phytohormones, antioxidants and xeroprotectants, and the induction of plant resistance. Rhizospheric or plant surface-colonizing (rhizoplane) and interior (endophytic) bacteria and fungi appear to be a suitable alternative for drought-stress management. Application of various biopreparations containing PGPM seems to provide hope for a relatively cheap, easy to apply and efficient way of alleviating drought stress in plants, with implications in productivity and food condition.
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Development of Banana Peel Powder as Organic Carrier based Bioformulation and Determination of its Plant Growth Promoting Efficacy in Rice Cr100g. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2021. [DOI: 10.22207/jpam.15.3.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Agriculture is the primary source of income for more than 50 % of the Indian population and the current challenge in the agricultural industry is the increased crop production with sustainable agricultural practices from the shrinking cropland area. Plant Growth Promoting Rhizobacteria (PGPR) has been used as a bio inoculants for increasing the crop yield and the effectiveness of PGPR as biofertilizers majorly depends on the selection of the best carrier material, proper formulation of microorganisms and mode of delivery of the formulation. So, the present study investigates the effect of PGPR bacterial strains isolated from the Siruvani forest region, Coimbatore, Tamil Nadu. We have tested the efficacy of these PGPR strains using both in vitro seed germination assay and in vivo pot culture studies in CR100G rice seeds. We have used the banana peel powder (Patent No: 202041010982) as a novel organic carrier material for the development of bioformulation, along with talc as an inorganic carrier material to perform the in vivo study. The results showed that the rice plants treated with banana peel powder based bioformulation gives the highest shoot length (15.78 cm) when compared to the control (10.48 cm) on the 14th day, 21st and 45th day of seed seeding. The grain yield also increased in the Non-Enriched Banana Single (NEBS) bacterium group (125%) when normalized with the control. Thus, our current study suggests that Banana peel powder could be the better approach to be used as an organic carrier material for the development of Biofertilizers in future.
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Elhaissoufi W, Ghoulam C, Barakat A, Zeroual Y, Bargaz A. Phosphate bacterial solubilization: A key rhizosphere driving force enabling higher P use efficiency and crop productivity. J Adv Res 2021; 38:13-28. [PMID: 35572398 PMCID: PMC9091742 DOI: 10.1016/j.jare.2021.08.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/07/2021] [Accepted: 08/19/2021] [Indexed: 02/06/2023] Open
Abstract
Phosphate bacteria bio-solubilization significantly increase crop P acquisition and productivity. Phosphate solubilizing bacteria increase RP agronomic efficiency as well as P fertilizers efficiency. This process can be optimized through a rational bacterial screening to assure efficient PSB are selected. Appropriate formulation of PSB is a sustainable approach to enhance P-fertilizers efficiency. Development of innovative PSB-Phosphate formulations is likely to sustain crop production.
Background Increasing crop production to feed a growing population has driven the use of mineral fertilizers to ensure nutrients availability and fertility of agricultural soils. After nitrogen, phosphorus (P) is the second most important nutrient for plant growth and productivity. However, P availability in most agricultural soils is often limited because P strongly binds to soil particles and divalent cations forming insoluble P-complexes. Therefore, there is a constant need to sustainably improve soil P availability. This may include, among other strategies, the application of microbial resources specialized in P cycling, such as phosphate solubilizing bacteria (PSB). This P-mediating bacterial component can improve soil biological fertility and crop production, and should be integrated in well-established formulations to enhance availability and efficiency in use of P. This is of importance to P fertilization, including both organic and mineral P such as rock phosphate (RP) aiming to improve its agronomic efficiency within an integrated crop nutrition system where agronomic profitability of P and PSB can synergistically occur. Aim of Review The purpose of this review is to discuss critically the important contribution of PSB to crop P nutrition in concert with P fertilizers, with a specific focus on RP. We also highlight the need for PSB bioformulations being a sustainable approach to enhance P fertilizer use efficiency and crop production. Key Scientific Concepts of Review We first recognize the important contribution of PSB to sustain crop production, which requires a rational approach for both screening and evaluation of PSB enabling an accurate assessment of the bacterial effects both alone and in intertwined interaction with plant roots. Furthermore, we propose new research ideas about the development of microbial bioformulations based on PSB with a particular focus on strains exhibiting synergetic effects with RP.
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Baltazar M, Correia S, Guinan KJ, Sujeeth N, Bragança R, Gonçalves B. Recent Advances in the Molecular Effects of Biostimulants in Plants: An Overview. Biomolecules 2021; 11:biom11081096. [PMID: 34439763 PMCID: PMC8394449 DOI: 10.3390/biom11081096] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/17/2021] [Accepted: 07/21/2021] [Indexed: 01/10/2023] Open
Abstract
As the world develops and population increases, so too does the demand for higher agricultural output with lower resources. Plant biostimulants appear to be one of the more prominent sustainable solutions, given their natural origin and their potential to substitute conventional methods in agriculture. Classified based on their source rather than constitution, biostimulants such as humic substances (HS), protein hydrolysates (PHs), seaweed extracts (SWE) and microorganisms have a proven potential in improving plant growth, increasing crop production and quality, as well as ameliorating stress effects. However, the multi-molecular nature and varying composition of commercially available biostimulants presents challenges when attempting to elucidate their underlying mechanisms. While most research has focused on the broad effects of biostimulants in crops, recent studies at the molecular level have started to unravel the pathways triggered by certain products at the cellular and gene level. Understanding the molecular influences involved could lead to further refinement of these treatments. This review comprises the most recent findings regarding the use of biostimulants in plants, with particular focus on reports of their molecular influence.
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Affiliation(s)
- Miguel Baltazar
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal; (S.C.); (B.G.)
- Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production (Inov4Agro), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
- Correspondence:
| | - Sofia Correia
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal; (S.C.); (B.G.)
- Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production (Inov4Agro), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
| | - Kieran J. Guinan
- BioAtlantis Ltd., Clash Industrial Estate, Tralee, V92 RWV5 County Kerry, Ireland; (K.J.G.); (N.S.)
| | - Neerakkal Sujeeth
- BioAtlantis Ltd., Clash Industrial Estate, Tralee, V92 RWV5 County Kerry, Ireland; (K.J.G.); (N.S.)
| | - Radek Bragança
- BioComposites Centre, Bangor University, Bangor LL57 2UW, UK;
| | - Berta Gonçalves
- Centre for the Research and Technology of Agro-Environmental and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal; (S.C.); (B.G.)
- Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production (Inov4Agro), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
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de Moraes ACP, Ribeiro LDS, de Camargo ER, Lacava PT. The potential of nanomaterials associated with plant growth-promoting bacteria in agriculture. 3 Biotech 2021; 11:318. [PMID: 34194902 PMCID: PMC8190246 DOI: 10.1007/s13205-021-02870-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Accepted: 05/31/2021] [Indexed: 01/18/2023] Open
Abstract
The impacts of chemical fertilizers and pesticides have raised public concerns regarding the sustainability and security of food supplies, prompting the investigation of alternative methods that have combinations of both agricultural and environmental benefits, such as the use of biofertilizers involving microbes. These types of microbial inoculants are living microorganisms that colonize the soil or plant tissues when applied to the soil, seeds, or plant surfaces, facilitating plant nutrient acquisition. They can enhance plant growth by transforming nutrients into a form assimilable by plants and by acting as biological control agents, known as plant growth-promoting bacteria. The potential use of bacteria as biofertilizers in agriculture constitutes an economical and eco-friendly way to reduce the use of chemical fertilizers and pesticides. In this context, nanotechnology has emerged as a new source of quality enrichment for the agricultural sector. The use of nanoparticles can be an effective method to meet the challenges regarding the effectiveness of biofertilizers in natural environments. Given the novel sustainable strategies applied in agricultural systems, this review addresses the effects of nanoparticles on beneficial plant bacteria for promoting plant growth.
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Affiliation(s)
- Amanda Carolina Prado de Moraes
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
- Biotechnology Graduation Program (PPG-Biotec), Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
| | - Lucas da Silva Ribeiro
- Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
| | - Emerson Rodrigues de Camargo
- Interdisciplinary Laboratory of Electrochemistry and Ceramics, Department of Chemistry, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
| | - Paulo Teixeira Lacava
- Laboratory of Microbiology and Biomolecules, Department of Morphology and Pathology, Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
- Biotechnology Graduation Program (PPG-Biotec), Federal University of São Carlos (UFSCar), Rod. Washington Luiz, s/n, São Carlos, 13565-905 Brazil
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Plant growth promoting soil microbiomes and their potential implications for agricultural and environmental sustainability. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00806-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Oszust K, Pylak M, Frąc M. Trichoderma-Based Biopreparation with Prebiotics Supplementation for the Naturalization of Raspberry Plant Rhizosphere. Int J Mol Sci 2021; 22:ijms22126356. [PMID: 34198606 PMCID: PMC8232080 DOI: 10.3390/ijms22126356] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 06/07/2021] [Accepted: 06/10/2021] [Indexed: 11/16/2022] Open
Abstract
The number of raspberry plants dying from a sudden outbreak of gray mold, verticillium wilt, anthracnosis, and phytophthora infection has increased in recent times, leading to crop failure. The plants suffer tissue collapse and black roots, symptoms similar to a Botrytis-Verticillium-Colletotrichum-Phytophthora disease complex. A sizeable number of fungal isolates were acquired from the root and rhizosphere samples of wild raspberries from different locations. Subsequent in vitro tests revealed that a core consortium of 11 isolates of selected Trichoderma spp. was the most essential element for reducing in phytopathogen expansion. For this purpose, isolates were characterized by the efficiency of their antagonistic properties against Botrytis, Verticillium, Colletotrichum and Phytophthora isolates and with hydrolytic properties accelerating the decomposition of organic matter in the soil and thus making nutrients available to plants. Prebiotic additive supplementation with a mixture of adonitol, arabitol, erythritol, mannitol, sorbitol, and adenosine was proven in a laboratory experiment to be efficient in stimulating the growth of Trichoderma isolates. Through an in vivo pathosystem experiment, different raspberry naturalization-protection strategies (root inoculations and watering with native Trichoderma isolates, applied separately or simultaneously) were tested under controlled phytotron conditions. The experimental application of phytopathogens attenuated raspberry plant and soil properties, while Trichoderma consortium incorporation exhibited a certain trend of improving these features in terms of a short-term response, depending on the pathosystem and naturalization strategy. What is more, a laboratory-scale development of a biopreparation for the naturalization of the raspberry rhizosphere based on the Trichoderma consortium was proposed in the context of two application scenarios. The first was a ready-to-use formulation to be introduced while planting (pellets, gel). The second was a variant to be applied with naturalizing watering (soluble powder).
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Vassileva M, Malusà E, Sas-Paszt L, Trzcinski P, Galvez A, Flor-Peregrin E, Shilev S, Canfora L, Mocali S, Vassilev N. Fermentation Strategies to Improve Soil Bio-Inoculant Production and Quality. Microorganisms 2021; 9:1254. [PMID: 34207668 PMCID: PMC8229917 DOI: 10.3390/microorganisms9061254] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/21/2021] [Accepted: 06/07/2021] [Indexed: 12/04/2022] Open
Abstract
The application of plant beneficial microorganisms has been widely accepted as an efficient alternative to chemical fertilizers and pesticides. Isolation and selection of efficient microorganisms, their characterization and testing in soil-plant systems are well studied. However, the production stage and formulation of the final products are not in the focus of the research, which affects the achievement of stable and consistent results in the field. Recent analysis of the field of plant beneficial microorganisms suggests a more integrated view on soil inoculants with a special emphasis on the inoculant production process, including fermentation, formulation, processes, and additives. This mini-review describes the different groups of fermentation processes and their characteristics, bearing in mind different factors, both nutritional and operational, which affect the biomass/spores yield and microbial metabolite activity. The characteristics of the final products of fermentation process optimization strategies determine further steps of development of the microbial inoculants. Submerged liquid and solid-state fermentation processes, fed-batch operations, immobilized cell systems, and production of arbuscular mycorrhiza are presented and their advantages and disadvantages are discussed. Recommendations for further development of the fermentation strategies for biofertilizer production are also considered.
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Affiliation(s)
- Maria Vassileva
- Department of Chemical Engineering, University of Granada, C/Fuentenueva s/n, 18071 Granada, Spain; (M.V.); (A.G.); (E.F.-P.)
| | - Eligio Malusà
- The National Institute of Horticultural Research, 96-100 Skierniewice, Poland; (E.M.); (L.S.-P.); (P.T.)
| | - Lidia Sas-Paszt
- The National Institute of Horticultural Research, 96-100 Skierniewice, Poland; (E.M.); (L.S.-P.); (P.T.)
| | - Pawel Trzcinski
- The National Institute of Horticultural Research, 96-100 Skierniewice, Poland; (E.M.); (L.S.-P.); (P.T.)
| | - Antonia Galvez
- Department of Chemical Engineering, University of Granada, C/Fuentenueva s/n, 18071 Granada, Spain; (M.V.); (A.G.); (E.F.-P.)
| | - Elena Flor-Peregrin
- Department of Chemical Engineering, University of Granada, C/Fuentenueva s/n, 18071 Granada, Spain; (M.V.); (A.G.); (E.F.-P.)
| | - Stefan Shilev
- Department of Microbiology and Environmental Biotechnology, University of Agriculture-Plovdiv, 4000 Plovdiv, Bulgaria;
| | - Loredana Canfora
- Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics, 00184 Roma, Italy; (L.C.); (S.M.)
| | - Stefano Mocali
- Research Centre for Agriculture and Environment, Council for Agricultural Research and Economics, 00184 Roma, Italy; (L.C.); (S.M.)
| | - Nikolay Vassilev
- Department of Chemical Engineering, University of Granada, C/Fuentenueva s/n, 18071 Granada, Spain; (M.V.); (A.G.); (E.F.-P.)
- Institute of Biotechnology, University of Granada, 18071 Granada, Spain
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Soumare A, Diédhiou AG, Arora NK, Tawfeeq Al-Ani LK, Ngom M, Fall S, Hafidi M, Ouhdouch Y, Kouisni L, Sy MO. Potential Role and Utilization of Plant Growth Promoting Microbes in Plant Tissue Culture. Front Microbiol 2021; 12:649878. [PMID: 33854489 PMCID: PMC8039301 DOI: 10.3389/fmicb.2021.649878] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/01/2021] [Indexed: 11/04/2022] Open
Abstract
Plant growth promoting microbes (PGPMs) play major roles in diverse ecosystems, including atmospheric nitrogen fixation, water uptake, solubilization, and transport of minerals from the soil to the plant. Different PGPMs are proposed as biofertilizers, biostimulants, and/or biocontrol agents to improve plant growth and productivity and thereby to contribute to agricultural sustainability and food security. However, little information exists regarding the use of PGPMs in micropropagation such as the in vitro plant tissue culture. This review presents an overview of the importance of PGPMs and their potential application in plant micropropagation. Our analysis, based on published articles, reveals that the process of in vitro classical tissue culture techniques, under strictly aseptic conditions, deserves to be reviewed to allow vitroplants to benefit from the positive effect of PGPMs. Furthermore, exploiting the potential benefits of PGPMs will lead to lessen the cost production of vitroplants during micropropagation process and will make the technique of plant tissue culture more efficient. The last part of the review will indicate where research is needed in the future.
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Affiliation(s)
- Abdoulaye Soumare
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco.,Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal.,Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Senegal
| | - Abdala G Diédhiou
- Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal.,Centre d'Excellence Africain en Agriculture pour la Sécurité Alimentaire et Nutritionnelle (CEA-AGRISAN), UCAD, Dakar, Senegal.,Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), Dakar, Senegal
| | - Naveen Kumar Arora
- Department of Environmental Science, School of Earth and Environmental Sciences, BBA University, Lucknow, India
| | - Laith Khalil Tawfeeq Al-Ani
- Department of Plant Protection, College of Agriculture Engineering Sciences, University of Baghdad, Baghdad, Iraq.,School of Biology Science, Universiti Sains Malaysia, Penang, Malaysia
| | - Mariama Ngom
- Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal.,Laboratoire Campus de Biotechnologies Végétales (LCBV), Département de Biologie Végétale, Faculté des Sciences et Techniques, UCAD, Dakar, Senegal
| | - Saliou Fall
- Laboratoire Commun de Microbiologie (LCM) IRD/ISRA/UCAD, Centre de Recherche de Bel Air, Dakar, Senegal
| | - Mohamed Hafidi
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco.,Laboratory of Microbial Biotechnologies, Agrosciences and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Yedir Ouhdouch
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco.,Laboratory of Microbial Biotechnologies, Agrosciences and Environment, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakesh, Morocco
| | - Lamfeddal Kouisni
- AgroBioSciences Program, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco
| | - Mame Ourèye Sy
- Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop (UCAD), Dakar, Senegal.,Laboratoire Campus de Biotechnologies Végétales (LCBV), Département de Biologie Végétale, Faculté des Sciences et Techniques, UCAD, Dakar, Senegal
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Raimi A, Roopnarain A, Adeleke R. Biofertilizer production in Africa: Current status, factors impeding adoption and strategies for success. SCIENTIFIC AFRICAN 2021. [DOI: 10.1016/j.sciaf.2021.e00694] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Aasfar A, Bargaz A, Yaakoubi K, Hilali A, Bennis I, Zeroual Y, Meftah Kadmiri I. Nitrogen Fixing Azotobacter Species as Potential Soil Biological Enhancers for Crop Nutrition and Yield Stability. Front Microbiol 2021; 12:628379. [PMID: 33717018 PMCID: PMC7947814 DOI: 10.3389/fmicb.2021.628379] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Accepted: 02/05/2021] [Indexed: 12/20/2022] Open
Abstract
Biological nitrogen fixation (BNF) refers to a microbial mediated process based upon an enzymatic "Nitrogenase" conversion of atmospheric nitrogen (N2) into ammonium readily absorbable by roots. N2-fixing microorganisms collectively termed as "diazotrophs" are able to fix biologically N2 in association with plant roots. Specifically, the symbiotic rhizobacteria induce structural and physiological modifications of bacterial cells and plant roots into specialized structures called nodules. Other N2-fixing bacteria are free-living fixers that are highly diverse and globally widespread in cropland. They represent key natural source of nitrogen (N) in natural and agricultural ecosystems lacking symbiotic N fixation (SNF). In this review, the importance of Azotobacter species was highlighted as both important free-living N2-fixing bacteria and potential bacterial biofertilizer with proven efficacy for plant nutrition and biological soil fertility. In addition, we described Azotobacter beneficial plant promoting traits (e.g., nutrient use efficiency, protection against phytopathogens, phytohormone biosynthesis, etc.). We shed light also on the agronomic features of Azotobacter that are likely an effective component of integrated plant nutrition strategy, which contributes positively to sustainable agricultural production. We pointed out Azotobacter based-biofertilizers, which possess unique characteristics such as cyst formation conferring resistance to environmental stresses. Such beneficial traits can be explored profoundly for the utmost aim to research and develop specific formulations based on inoculant Azotobacter cysts. Furthermore, Azotobacter species still need to be wisely exploited in order to address specific agricultural challenges (e.g., nutrient deficiencies, biotic and abiotic constraints) taking into consideration several variables including their biological functions, synergies and multi-trophic interactions, and biogeography and abundance distribution.
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Affiliation(s)
- Abderrahim Aasfar
- Green Biotechnology Laboratory, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Rabat Design Centre, Rabat, Morocco.,Laboratory of Health Sciences and Technologies, High Institute of Health Sciences, Hassan 1st University, Settat, Morocco
| | - Adnane Bargaz
- AgroBioSciences-Microbiome, Laboratory of Plant-Microbe Interactions, Mohammed VI Polytechnic University, Ben Guerir, Morocco
| | - Kaoutar Yaakoubi
- Green Biotechnology Laboratory, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Rabat Design Centre, Rabat, Morocco
| | - Abderraouf Hilali
- Laboratory of Health Sciences and Technologies, High Institute of Health Sciences, Hassan 1st University, Settat, Morocco
| | - Iman Bennis
- Green Biotechnology Laboratory, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Rabat Design Centre, Rabat, Morocco
| | | | - Issam Meftah Kadmiri
- Green Biotechnology Laboratory, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Rabat Design Centre, Rabat, Morocco.,AgroBioSciences-Microbiome, Laboratory of Plant-Microbe Interactions, Mohammed VI Polytechnic University, Ben Guerir, Morocco
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Identification of Beneficial Microbial Consortia and Bioactive Compounds with Potential as Plant Biostimulants for a Sustainable Agriculture. Microorganisms 2021; 9:microorganisms9020426. [PMID: 33669534 PMCID: PMC7922931 DOI: 10.3390/microorganisms9020426] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 01/28/2023] Open
Abstract
A growing body of evidence demonstrates the potential of various microbes to enhance plant productivity in cropping systems although their successful field application may be impaired by several biotic and abiotic constraints. In the present work, we aimed at developing multifunctional synthetic microbial consortia to be used in combination with suitable bioactive compounds for improving crop yield and quality. Plant growth-promoting microorganisms (PGPMs) with different functional attributes were identified by a bottom-up approach. A comprehensive literature survey on PGPMs associated with maize, wheat, potato and tomato, and on commercial formulations, was conducted by examining peer-reviewed scientific publications and results from relevant European projects. Metagenome fragment recruitments on genomes of potential PGPMs represented in databases were also performed to help identify plant growth-promoting (PGP) strains. Following evidence of their ability to coexist, isolated PGPMs were synthetically assembled into three different microbial consortia. Additionally, the effects of bioactive compounds on the growth of individually PGPMs were tested in starvation conditions. The different combination products based on microbial and non-microbial biostimulants (BS) appear worth considering for greenhouse and open field trials to select those potentially adoptable in sustainable agriculture.
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Szymańska S, Sikora M, Hrynkiewicz K, Tyburski J, Tretyn A, Gołębiewski M. Choosing source of microorganisms and processing technology for next generation beet bioinoculant. Sci Rep 2021; 11:2829. [PMID: 33531601 PMCID: PMC7854725 DOI: 10.1038/s41598-021-82436-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 01/12/2021] [Indexed: 11/09/2022] Open
Abstract
The increase of human population and associated increasing demand for agricultural products lead to soil over-exploitation. Biofertilizers based on lyophilized plant material containing living plant growth-promoting microorganisms (PGPM) could be an alternative to conventional fertilizers that fits into sustainable agricultural technologies ideas. We aimed to: (1) assess the diversity of endophytic bacteria in sugar and sea beet roots and (2) determine the influence of osmoprotectants (trehalose and ectoine) addition during lyophilization on bacterial density, viability and salt tolerance. Microbiome diversity was assessed based on 16S rRNA amplicons sequencing, bacterial density and salt tolerance was evaluated in cultures, while bacterial viability was calculated by using fluorescence microscopy and flow cytometry. Here we show that plant genotype shapes its endophytic microbiome diversity and determines rhizosphere soil properties. Sea beet endophytic microbiome, consisting of genera characteristic for extreme environments, is more diverse and salt resistant than its crop relative. Supplementing osmoprotectants during root tissue lyophilization exerts a positive effect on bacterial community salt stress tolerance, viability and density. Trehalose improves the above-mentioned parameters more effectively than ectoine, moreover its use is economically advantageous, thus it may be used to formulate improved biofertilizers.
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Affiliation(s)
- Sonia Szymańska
- Department of Microbiology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University (NCU), Lwowska 1, 87-100, Toruń, Poland
| | - Marcin Sikora
- Center for Modern Interdisciplinary Technologies, Nicolaus Copernicus University (NCU), Toruń, Poland
| | - Katarzyna Hrynkiewicz
- Department of Microbiology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University (NCU), Lwowska 1, 87-100, Toruń, Poland.
| | - Jarosław Tyburski
- Center for Modern Interdisciplinary Technologies, Nicolaus Copernicus University (NCU), Toruń, Poland.,Chair of Plant Physiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University (NCU), Lwowska 1, 87-100, Toruń, Poland
| | - Andrzej Tretyn
- Center for Modern Interdisciplinary Technologies, Nicolaus Copernicus University (NCU), Toruń, Poland.,Chair of Plant Physiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University (NCU), Lwowska 1, 87-100, Toruń, Poland
| | - Marcin Gołębiewski
- Center for Modern Interdisciplinary Technologies, Nicolaus Copernicus University (NCU), Toruń, Poland. .,Chair of Plant Physiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University (NCU), Lwowska 1, 87-100, Toruń, Poland.
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Role of Useful Fungi in Agriculture Sustainability. Fungal Biol 2021. [DOI: 10.1007/978-3-030-60659-6_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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