1
|
Artigas Ramírez MD, Agake SI, Maeda M, Kojima K, Ohkama-Ohtsu N, Yokoyama T. Diversity of Fast-Growth Spore-Forming Microbes and Their Activity as Plant Partners. Microorganisms 2023; 11:microorganisms11020232. [PMID: 36838197 PMCID: PMC9961442 DOI: 10.3390/microorganisms11020232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/15/2023] [Accepted: 01/16/2023] [Indexed: 01/18/2023] Open
Abstract
Biofertilizers are agricultural materials capable of reducing the usage amounts of chemical fertilizers. Spore-forming microorganisms (SFM) could be used for plant growth promotion or to improve plant health. Until now, biofertilizers based on SFM have been applied for rice and other crops. In this study, we isolated and characterized SFM, which were colonized on the Oryza sativa L. roots. SFM were analyzed regarding the short-term effects of biofertilization on the nursery growths. Analysis was performed without nitrogen or any inorganic fertilizer and was divided into two groups, including bacteria and fungi. SF-bacteria were dominated by the Firmicutes group, including species from Viridibacillus, Lysinibacillus, Solibacillus, Paenibacillus, Priestia, and mainly Bacillus (50%). The fungi group was classified as Mucoromycota, Basidiomycota, and mainly Ascomycota (80%), with a predominance of Penicillium and Trichoderma species. In plant performance in comparison with B. pumilus TUAT1, some bacteria and fungus isolates significantly improved the early growth of rice, based on 48 h inoculum with 107 CFU mL-1. Furthermore, several SFM showed positive physiological responses under abiotic stress or with limited nutrients such as phosphorous (P). Moreover, the metabolic fingerprint was obtained. The biofertilizer based on SFM could significantly reduce the application of the inorganic fertilizer and improve the lodging resistances of rice, interactively enhancing better plant health and crop production.
Collapse
Affiliation(s)
- María Daniela Artigas Ramírez
- Iriomote Station, Tropical Biosphere Research Center, University of the Ryukyus, 870 Uehara, Yaeyama, Taketomi, Okinawa 907-1541, Japan
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu, Tokyo 183-8538, Japan
| | - Shin-ichiro Agake
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu, Tokyo 183-8538, Japan
| | - Masumi Maeda
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Harumi-cho 3-8-8, Fuchu, Tokyo 183-8538, Japan
| | - Katsuhiro Kojima
- Faculty of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu, Tokyo 183-8538, Japan
| | - Naoko Ohkama-Ohtsu
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu, Tokyo 183-8538, Japan
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Harumi-cho 3-8-8, Fuchu, Tokyo 183-8538, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Harumi-cho 3-8-8, Fuchu, Tokyo 183-8538, Japan
- Faculty of Food and Agricultural Science, Fukushima University, Kanayagawa 1, Fukushima 960-1296, Japan
- Correspondence: ; Tel.: +81-24-548-8420
| |
Collapse
|
2
|
Mortuza MF, Djedidi S, Ito T, Agake SI, Sekimoto H, Yokoyama T, Okazaki S, Ohkama-Ohtsu N. Genetic and Physiological Characterization of Soybean-Nodule-Derived Isolates from Bangladeshi Soils Revealed Diverse Array of Bacteria with Potential Bradyrhizobia for Biofertilizers. Microorganisms 2022; 10:2282. [PMID: 36422352 PMCID: PMC9698105 DOI: 10.3390/microorganisms10112282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/05/2022] [Accepted: 11/15/2022] [Indexed: 12/13/2023] Open
Abstract
Genetic and physiological characterization of bacteria derived from nodules of leguminous plants in the exploration of biofertilizer is of paramount importance from agricultural and environmental perspectives. Phylogenetic analysis of the 16S rRNA gene of 84 isolates derived from Bangladeshi soils revealed an unpredictably diverse array of nodule-forming and endosymbiotic bacteria-mostly belonging to the genus Bradyrhizobium. A sequence analysis of the symbiotic genes (nifH and nodD1) revealed similarities with the 16S rRNA gene tree, with few discrepancies. A phylogenetic analysis of the partial rrn operon (16S-ITS-23S) and multi-locus sequence analysis of atpD, glnII, and gyrB identified that the Bradyrhizobium isolates belonged to Bradyrhizobium diazoefficiens, Bradyrhizobium elkanii, Bradyrhizobium liaoningense and Bradyrhizobium yuanmingense species. In the pot experiment, several isolates showed better activity than B. diazoefficiens USDA110, and the Bho-P2-B2-S1-51 isolate of B. liaoningense showed significantly higher acetylene reduction activity in both Glycine max cv. Enrei and Binasoybean-3 varieties and biomass production increased by 9% in the Binasoybean-3 variety. Tha-P2-B1-S1-68 isolate of B. diazoefficiens significantly enhanced shoot length and induced 10% biomass production in Binasoybean-3. These isolates grew at 1-4% NaCl concentration and pH 4.5-10 and survived at 45 °C, making the isolates potential candidates for eco-friendly soybean biofertilizers in salty and tropical regions.
Collapse
Affiliation(s)
- Md Firoz Mortuza
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu-shi, Tokyo 183-8509, Japan
- Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Bangladesh Atomic Energy Commission, Ganakbari, Savar, Dhaka 1207, Bangladesh
| | - Salem Djedidi
- Faculty of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu-shi, Tokyo 183-8509, Japan
| | - Takehiro Ito
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu-shi, Tokyo 183-8509, Japan
| | - Shin-ichiro Agake
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Harumi-cho 3-8-1, Fuchu-shi, Tokyo 183-8509, Japan
| | - Hitoshi Sekimoto
- Faculty of Agriculture, Utsunomiya University, Utsunomiya-shi, Tochigi 321-8505, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu-shi, Tokyo 183-8509, Japan
- Faculty of Food and Agricultural Sciences, Fukushima University, Kanayagawa 1, Fukushima-shi, Fukushima 960-1248, Japan
| | - Shin Okazaki
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu-shi, Tokyo 183-8509, Japan
| | - Naoko Ohkama-Ohtsu
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Harumi-cho 3-8-1, Fuchu-shi, Tokyo 183-8509, Japan
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Saiwai-cho 3-5-8, Fuchu-shi, Tokyo 183-8509, Japan
| |
Collapse
|
3
|
Damo JLC, Ramirez MDA, Agake SI, Pedro M, Brown M, Sekimoto H, Yokoyama T, Sugihara S, Okazaki S, Ohkama-Ohtsu N. Isolation and Characterization of Phosphate Solubilizing Bacteria from Paddy Field Soils in Japan. Microbes Environ 2022; 37. [PMID: 35598988 PMCID: PMC9530731 DOI: 10.1264/jsme2.me21085] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Phosphorus (P) is abundant in soil and is essential for plant growth and development; however, it is easily rendered insoluble in complexes of different types of phosphates, which may lead to P deficiency. Therefore, increases in the amount of P released from phosphate minerals using microbial inoculants is an important aspect of agriculture. The present study used inorganic phosphate solubilizing bacteria (iPSB) in paddy field soils to develop microbial inoculants. Soils planted with rice were collected from different regions of Japan. Soil P was sequentially fractionated using the Hedley method. iPSB were isolated using selective media supplemented with tricalcium phosphate (Ca-P), aluminum phosphate (Al-P), or iron phosphate (Fe-P). Representative isolates were selected based on the P solubilization index and soil sampling site. Identification was performed using 16S rRNA and rpoB gene sequencing. Effectiveness was screened based on rice cultivar Koshihikari growth supplemented with Ca-P, Al-P, or Fe-P as the sole P source. Despite the relatively homogenous soil pH of paddy field sources, three sets of iPSB were isolated, suggesting the influence of fertilizer management and soil types. Most isolates were categorized as β-Proteobacteria (43%). To the best of our knowledge, this is the first study to describe the genera Pleomorphomonas, Rhodanobacter, and Trinickia as iPSB. Acidovorax sp. JC5, Pseudomonas sp. JC11, Burkholderia sp. JA6 and JA10, Sphingomonas sp. JA11, Mycolicibacterium sp. JF5, and Variovorax sp. JF6 promoted plant growth in rice supplemented with an insoluble P source. The iPSBs obtained may be developed as microbial inoculants for various soil types with different P fixation capacities.
Collapse
Affiliation(s)
| | | | - Shin-ichiro Agake
- United Graduate School of Agriculture, Tokyo University of Agriculture and Technology
| | - Mannix Pedro
- National Institute of Molecular Biology and Biotechnology, University of the Philippines Los Baños
| | - Marilyn Brown
- National Institute of Molecular Biology and Biotechnology, University of the Philippines Los Baños
| | | | | | - Soh Sugihara
- Institute of Agriculture, Tokyo University of Agriculture and Technology
| | - Shin Okazaki
- Institute of Agriculture, Tokyo University of Agriculture and Technology
| | - Naoko Ohkama-Ohtsu
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology
| |
Collapse
|