1
|
Wang T, Chen Q, Liang Q, Zhao Q, Lu X, Tian J, Guan Z, Liu C, Li J, Zhou M, Tian J, Liang C. Bacillus suppresses nitrogen efficiency of soybean-rhizobium symbiosis through regulation of nitrogen-related transcriptional and microbial patterns. PLANT, CELL & ENVIRONMENT 2024; 47:4305-4322. [PMID: 38963088 DOI: 10.1111/pce.15023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 05/21/2024] [Accepted: 06/21/2024] [Indexed: 07/05/2024]
Abstract
The regulation of legume-rhizobia symbiosis by microorganisms has obtained considerable interest in recent research, particularly in the common rhizobacteria Bacillus. However, few studies have provided detailed explanations regarding the regulatory mechanisms involved. Here, we investigated the effects of Bacillus (Bac.B) on Bradyrhizobium-soybean (Glycine max) symbiosis and elucidated the underlying ecological mechanisms. We found that two Bradyrhizobium strains (i.e. Bra.Q2 and Bra.D) isolated from nodules significantly promoted nitrogen (N) efficiency of soybean via facilitating nodule formation, thereby enhanced plant growth and yield. However, the intrusion of Bac.B caused a reverse shift in the synergistic efficiency of N2 fixation in the soybean-Bradyrhizobium symbiosis. Biofilm formation and naringenin may be importantin suppression of Bra.Q2 growth regulated by Bac.B. In addition, transcriptome and microbiome analyses revealed that Bra.Q2 and Bac.B might interact to regulateN transport and assimilation, thus influence the bacterial composition related to plant N nutrition in nodules. Also, the metabolisms of secondary metabolites and hormones associated with plant-microbe interaction and growth regulation were modulated by Bra.Q2 and Bac.B coinoculation. Collectively, we demonstrate that Bacillus negatively affects Bradyrhizobium-soybean symbiosis and modulate microbial interactions in the nodule. Our findings highlight a novel Bacillus-based regulation to improve N efficiency and sustainable agricultural development.
Collapse
Affiliation(s)
- Tianqi Wang
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Qianqian Chen
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Quan Liang
- College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming, China
| | - Qian Zhao
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Xing Lu
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Jihui Tian
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Zidi Guan
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Chang Liu
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Jifu Li
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Ming Zhou
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Jiang Tian
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| | - Cuiyue Liang
- Root Biology Center, State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China
| |
Collapse
|
2
|
Hnini M, Aurag J. Prevalence, diversity and applications potential of nodules endophytic bacteria: a systematic review. Front Microbiol 2024; 15:1386742. [PMID: 38812696 PMCID: PMC11133547 DOI: 10.3389/fmicb.2024.1386742] [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: 02/16/2024] [Accepted: 04/29/2024] [Indexed: 05/31/2024] Open
Abstract
Legumes are renowned for their distinctive biological characteristic of forming symbiotic associations with soil bacteria, mostly belonging to the Rhizobiaceae familiy, leading to the establishment of symbiotic root nodules. Within these nodules, rhizobia play a pivotal role in converting atmospheric nitrogen into a plant-assimilable form. However, it has been discerned that root nodules of legumes are not exclusively inhabited by rhizobia; non-rhizobial endophytic bacteria also reside within them, yet their functions remain incompletely elucidated. This comprehensive review synthesizes available data, revealing that Bacillus and Pseudomonas are the most prevalent genera of nodule endophytic bacteria, succeeded by Paenibacillus, Enterobacter, Pantoea, Agrobacterium, and Microbacterium. To date, the bibliographic data available show that Glycine max followed by Vigna radiata, Phaseolus vulgaris and Lens culinaris are the main hosts for nodule endophytic bacteria. Clustering analysis consistently supports the prevalence of Bacillus and Pseudomonas as the most abundant nodule endophytic bacteria, alongside Paenibacillus, Agrobacterium, and Enterobacter. Although non-rhizobial populations within nodules do not induce nodule formation, their presence is associated with various plant growth-promoting properties (PGPs). These properties are known to mediate important mechanisms such as phytostimulation, biofertilization, biocontrol, and stress tolerance, emphasizing the multifaceted roles of nodule endophytes. Importantly, interactions between non-rhizobia and rhizobia within nodules may exert influence on their leguminous host plants. This is particularly shown by co-inoculation of legumes with both types of bacteria, in which synergistic effects on plant growth, yield, and nodulation are often measured. Moreover these effects are pronounced under both stress and non-stress conditions, surpassing the impact of single inoculations with rhizobia alone.
Collapse
Affiliation(s)
| | - Jamal Aurag
- Microbiology and Molecular Biology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| |
Collapse
|
3
|
Ahmed T, Noman M, Qi Y, Shahid M, Hussain S, Masood HA, Xu L, Ali HM, Negm S, El-Kott AF, Yao Y, Qi X, Li B. Fertilization of Microbial Composts: A Technology for Improving Stress Resilience in Plants. PLANTS (BASEL, SWITZERLAND) 2023; 12:3550. [PMID: 37896014 PMCID: PMC10609736 DOI: 10.3390/plants12203550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/28/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023]
Abstract
Microbial compost plays a crucial role in improving soil health, soil fertility, and plant biomass. These biofertilizers, based on microorganisms, offer numerous benefits such as enhanced nutrient acquisition (N, P, and K), production of hydrogen cyanide (HCN), and control of pathogens through induced systematic resistance. Additionally, they promote the production of phytohormones, siderophore, vitamins, protective enzymes, and antibiotics, further contributing to soil sustainability and optimal agricultural productivity. The escalating generation of organic waste from farm operations poses significant threats to the environment and soil fertility. Simultaneously, the excessive utilization of chemical fertilizers to achieve high crop yields results in detrimental impacts on soil structure and fertility. To address these challenges, a sustainable agriculture system that ensures enhanced soil fertility and minimal ecological impact is imperative. Microbial composts, developed by incorporating characterized plant-growth-promoting bacteria or fungal strains into compost derived from agricultural waste, offer a promising solution. These biofertilizers, with selected microbial strains capable of thriving in compost, offer an eco-friendly, cost-effective, and sustainable alternative for agricultural practices. In this review article, we explore the potential of microbial composts as a viable strategy for improving plant growth and environmental safety. By harnessing the benefits of microorganisms in compost, we can pave the way for sustainable agriculture and foster a healthier relationship between soil, plants, and the environment.
Collapse
Affiliation(s)
- Temoor Ahmed
- Xianghu Laboratory, Hangzhou 311231, China; (T.A.)
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China;
| | - Muhammad Noman
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China;
| | - Yetong Qi
- Xianghu Laboratory, Hangzhou 311231, China; (T.A.)
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad 38000, Pakistan;
| | - Sabir Hussain
- Department of Environmental Sciences, Government College University, Faisalabad 38040, Pakistan;
| | - Hafiza Ayesha Masood
- Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad 38000, Pakistan
- MEU Research Unit, Middle East University, Amman 11831, Jordan
| | - Lihui Xu
- Institute of Eco-Environmental Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China;
| | - Hayssam M. Ali
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Sally Negm
- Department of Life Sciences, College of Science and Art Mahyel Aseer, King Khalid University, Abha 62529, Saudi Arabia;
| | - Attalla F. El-Kott
- Department of Biology, College of Science, King Khalid University, Abha 61421, Saudi Arabia
| | - Yanlai Yao
- Xianghu Laboratory, Hangzhou 311231, China; (T.A.)
| | - Xingjiang Qi
- Xianghu Laboratory, Hangzhou 311231, China; (T.A.)
| | - Bin Li
- Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China;
| |
Collapse
|
4
|
Dhole AM, Shelat HN, Patel HK, Jhala YK. Evaluation of the Co-inoculation Effect of Rhizobium and Plant Growth Promoting Non-rhizobial Endophytes on Vigna radiata. Curr Microbiol 2023; 80:167. [PMID: 37024674 DOI: 10.1007/s00284-023-03266-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 03/11/2023] [Indexed: 04/08/2023]
Abstract
A unique feature of leguminous plants is the establishment of symbiotic bacterial genera inside root or stem nodules that is being recently re-evaluated for investigating the micro-flora discrete to nitrogen fixation. The present research was carried out to evaluate non-rhizobial endophytes and Rhizobium from root nodules of Vigna radiata and ascertain their co-inoculation effect in pot and field conditions. Each strain displayed one or more plant growth-promoting behaviors in varying degrees. The ability to fix nitrogen was observed in all strains; however, a noticeable enhancement in nitrogen fixation was observed when all three strains were co-inoculated. All three strains were found to possess the nifH gene, which plays a key role in the nitrogen fixation process. However, only Rhizobium sp. AAU B3 also had the nodD gene present. Furthermore, combinations of all three strains produced the highest levels of phosphate solubilization, potash mobilisation, Indole Acetic Acid (IAA), and the stress-relieving enzyme 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase. Interestingly, the succession of the root nodule formation within root hairs seedlings was observed under a fluorescence microscope and two NRE were found to be located inside the root nodules, indicating that they are endophytic. Additionally, a pot and field investigation revealed that the combination of chosen Rhizobium and NRE strains had a favorable impact on the growth and yield characteristics of a green gram. Selected bio-inoculants can reduce the utilization of synthetic fertilizers by 75%, which might lead to the restoration of the soil's health. Therefore, these bio-inoculants might be explored commercially for sustainable agriculture production.
Collapse
Affiliation(s)
- Archana M Dhole
- B. A. College of Agriculture, Anand Agricultural University, Anand, Gujarat, 388110, India.
| | - Harsha N Shelat
- B. A. College of Agriculture, Anand Agricultural University, Anand, Gujarat, 388110, India
| | - Hiren K Patel
- B. A. College of Agriculture, Anand Agricultural University, Anand, Gujarat, 388110, India
| | - Yogeshvari K Jhala
- B. A. College of Agriculture, Anand Agricultural University, Anand, Gujarat, 388110, India
| |
Collapse
|
5
|
da Silva TR, Rodrigues RT, Jovino RS, Carvalho JRDS, Leite J, Hoffman A, Fischer D, Ribeiro PRDA, Rouws LFM, Radl V, Fernandes-Júnior PI. Not just passengers, but co-pilots! Non-rhizobial nodule-associated bacteria promote cowpea growth and symbiosis with (brady)rhizobia. J Appl Microbiol 2023; 134:lxac013. [PMID: 36626727 DOI: 10.1093/jambio/lxac013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 08/15/2022] [Accepted: 10/07/2022] [Indexed: 01/12/2023]
Abstract
AIMS To isolate and characterize non-rhizobial nodule-associated bacteria (NAB) from cowpea root-nodules regarding their performance of plant-growth-promoting mechanisms and their ability to enhance cowpea growth and symbiosis when co-inoculated with bradyrhizobia. METHODS AND RESULTS Sixteen NAB were isolated, identified, and in vitro evaluated for plant growth promotion traits. The ability to promote cowpea growth was analyzed when co-inoculated with Bradyrhizobium pachyrhizi BR 3262 in sterile and non-sterile substrates. The 16S rRNA gene sequences analysis revealed that NAB belonged to the genera Chryseobacterium (4), Bacillus (3), Microbacterium (3), Agrobacterium (1), Escherichia (1), Delftia (1), Pelomonas (1), Sphingomonas (1), and Staphylococcus (1). All strains produced different amounts of auxin siderophores and formed biofilms. Twelve out of the 16 strains carried the nifH, a gene associated with nitrogen fixation. Co-inoculation of NAB (ESA 424 and ESA 29) with Bradyrhizobium pachyrhizi BR 3262 significantly promoted cowpea growth, especially after simultaneous inoculation with the three strains. CONCLUSIONS NAB are efficient cowpea growth promoters and can improve the efficiency of the symbiosis between cowpea and the N2-fixing microsymbiont B. pachyrhizi BR 3262, mainly under a specific triple microbial association.
Collapse
Affiliation(s)
- Thaíse Rosa da Silva
- Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (Univasf), Petrolina, PE 56304-205, Brazil
| | - Ruth Terezinha Rodrigues
- Colegiado de Farmácia, Universidade Federal do Vale do São Francisco (Univasf), Petrolina, PE 56304-205, Brazil
| | | | | | - Jakson Leite
- Instituto Federal de Educação, Ciência e Tecnologia do Pará (IFPA), Campus Itaituba, Itaituba, PA 68183-300, Brazil
| | - Andreas Hoffman
- Helmholtz Munich, German Research Center for Environmental Health, Neuherberg, Munich 85764, Germany
| | - Doreen Fischer
- Helmholtz Munich, German Research Center for Environmental Health, Neuherberg, Munich 85764, Germany
| | - Paula Rose de Almeida Ribeiro
- Fundação de Amparo à Pesquisa do Estado de Pernambuco (Facepe), Recife, PE 50720-001, Brazil
- Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brasília, DF 71605-001, Brazil
- Embrapa Semiárido, Petrolina, PE 56302-970, Brazil
| | | | - Viviane Radl
- Helmholtz Munich, German Research Center for Environmental Health, Neuherberg, Munich 85764, Germany
| | | |
Collapse
|