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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.
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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
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Sinong GF, Yasuda M, Nara Y, Lee CG, Dastogeer KMG, Tabuchi H, Nakai H, Djedidi S, Okazaki S. Distinct Root Microbial Communities in Nature Farming Rice Harbor Bacterial Strains With Plant Growth-Promoting Traits. Front Sustain Food Syst 2021. [DOI: 10.3389/fsufs.2020.629942] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A nature farming system is an ecological farming practice that entails cultivating crops without using chemical fertilizers and pesticides. To understand the diversity and functions of root microbiomes associated with nature farming systems, we compared the root microbial community of rice under nature farming conditions with those under conventional farming conditions. High-throughput amplicon analysis demonstrated a higher abundance and greater diversity of the root microbiome under unfertilized nature farming conditions than under conventional conditions. The application of chemical fertilizers reduced the microbial diversity and abundance of some beneficial taxa important for plant growth and health. Subsequently, we isolated and identified 46 endo- and epiphytic bacteria from rice roots grown under nature farming conditions and examined their plant growth-promoting activity. Six potential isolates were selected for plant growth assessment in insoluble P- and K-containing media. Most of the isolates promoted rice growth, and Pseudomonas koreensis AEPR1 was able to enhance rice growth significantly in both insoluble P- and K-containing media. Our data indicated that nature farming systems create a distinct root microbiome that is comparatively more diverse and supports plant growth under low-input cultivation practices than under conventional practices. The potential isolates could be exploited as sources with potential applications in sustainable agriculture.
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Djedidi S, Yokoyama T, Ohkama-Ohtsu N, Risal CP, Abdelly C, Sekimoto H. Author's Correction: Stress Tolerance and Symbiotic and Phylogenic Features of Root Nodule Bacteria Associated with Medicago Species in Different Bioclimatic Regions of Tunisia. Microbes Environ 2020; 35. [PMID: 32893261 PMCID: PMC7511780 DOI: 10.1264/jsme2.me10138e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Salem Djedidi
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology.,Laboratory of Plant Adaptation to Abiotic Stresses (LAPSA), Biotechnology Centre of Borj Cedria
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology
| | - Naoko Ohkama-Ohtsu
- Women's Future Development Organization, Tokyo University of Agriculture and Technology
| | - Chandra Prasad Risal
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology
| | - Chedly Abdelly
- Laboratory of Plant Adaptation to Abiotic Stresses (LAPSA), Biotechnology Centre of Borj Cedria
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Yuan K, Reckling M, Ramirez MDA, Djedidi S, Fukuhara I, Ohyama T, Yokoyama T, Bellingrath-Kimura SD, Halwani M, Egamberdieva D, Ohkama-Ohtsu N. Characterization of Rhizobia for the Improvement of Soybean Cultivation at Cold Conditions in Central Europe. Microbes Environ 2020; 35:ME19124. [PMID: 31996499 PMCID: PMC7104276 DOI: 10.1264/jsme2.me19124] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/13/2019] [Indexed: 11/23/2022] Open
Abstract
In central Europe, soybean cultivation is gaining increasing importance to reduce protein imports from overseas and make cropping systems more sustainable. In the field, despite the inoculation of soybean with commercial rhizobia, its nodulation is low. In many parts of Europe, limited information is currently available on the genetic diversity of rhizobia and, thus, biological resources for selecting high nitrogen-fixing rhizobia are inadequate. These resources are urgently needed to improve soybean production in central Europe. The objective of the present study was to identify strains that have the potential to increase nitrogen fixation by and the yield of soybean in German soils. We isolated and characterized 77 soybean rhizobia from 18 different sampling sites. Based on a multilocus sequence analysis (MLSA), 71% of isolates were identified as Bradyrhizobium and 29% as Rhizobium. A comparative analysis of the nodD and nifH genes showed no significant differences, which indicated that the soybean rhizobia symbiotic genes in the present study belong to only one type. One isolate, GMF14 which was tolerant of a low temperature (4°C), exhibited higher nitrogen fixation in root nodules and a greater plant biomass than USDA 110 under cold conditions. These results strongly suggest that some indigenous rhizobia enhance biological nitrogen fixation and soybean yield due to their adaption to local conditions.
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Affiliation(s)
- Kun Yuan
- Institute of Global Innovation Research (GIR), Tokyo University of Agriculture and Technology, 3–5–8, Saiwai-cho, Fuchu-shi, Tokyo, 183–8509 Japan
| | - Moritz Reckling
- Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, 15374, Germany
| | - Maria Daniela Artigas Ramirez
- Institute of Global Innovation Research (GIR), Tokyo University of Agriculture and Technology, 3–5–8, Saiwai-cho, Fuchu-shi, Tokyo, 183–8509 Japan
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3–5–8, Saiwai-cho, Fuchu-shi, Tokyo, 183–8509 Japan
| | - Izumi Fukuhara
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3–5–8, Saiwai-cho, Fuchu-shi, Tokyo, 183–8509 Japan
| | - Takuji Ohyama
- Department of Agricultural Chemistry, Tokyo University of Agriculture, Tokyo, 156–8502, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3–5–8, Saiwai-cho, Fuchu-shi, Tokyo, 183–8509 Japan
| | | | - Mosab Halwani
- Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, 15374, Germany
| | - Dilfuza Egamberdieva
- Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, 15374, Germany
- Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, CAS, Urumqi, People’s Republic of China
| | - Naoko Ohkama-Ohtsu
- Institute of Global Innovation Research (GIR), Tokyo University of Agriculture and Technology, 3–5–8, Saiwai-cho, Fuchu-shi, Tokyo, 183–8509 Japan
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3–5–8, Saiwai-cho, Fuchu-shi, Tokyo, 183–8509 Japan
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Habibi S, Djedidi S, Ohkama-Ohtsu N, Sarhadi WA, Kojima K, Rallos RV, Ramirez MDA, Yamaya H, Sekimoto H, Yokoyama T. Isolation and Screening of Indigenous Plant Growth-promoting Rhizobacteria from Different Rice Cultivars in Afghanistan Soils. Microbes Environ 2019; 34:347-355. [PMID: 31527341 PMCID: PMC6934389 DOI: 10.1264/jsme2.me18168] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To develop biofertilizers for rice in Afghanistan, 98 plant growth-promoting rhizobacteria were isolated from rice plants and their morphological and physiological characteristics, such as indole-3-acetic acid production, acetylene reduction, phosphate and potassium solubilization, and siderophore production, were evaluated. The genetic diversity of these bacteria was also analyzed based on 16S rRNA gene sequences. Of 98 bacteria, 89.7% produced IAA, 54.0% exhibited nitrogenase activity, and 40% showed phosphate solubilization and siderophore production. Some isolates assigned to Pseudomonas (brassicacearum, chengduensis, plecoglossicida, resinovorans, and straminea) formed a relationship with rice, and P. resinovorans and P. straminea showed nitrogen fixation. Rhizobium borbori and R. rosettiformans showed a relationship with rice plants and nitrogen fixation. Among the isolates examined, AF134 and AF137 belonging to Enterobacter ludwigii and P. putida produced large amounts of IAA (92.3 μg mL−1) and exhibited high nitrogenase activity (647.4 nmol C2H4 h−1), respectively. In the plant growth test, more than 70% of the inoculated isolates showed significantly increased root and shoot dry weights. Highly diverse bacterial isolates showing promising rice growth-promoting traits were obtained from Afghanistan alkaline soils.
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Affiliation(s)
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology
| | - Naoko Ohkama-Ohtsu
- Institute of Agriculture, Tokyo University of Agriculture and Technology
| | | | - Katsuhiro Kojima
- Institute of Agriculture, Tokyo University of Agriculture and Technology
| | | | | | - Hiroko Yamaya
- Institute of Agriculture, Tokyo University of Agriculture and Technology
| | | | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology
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Hashami SZ, Nakamura H, Ohkama-Ohtsu N, Kojima K, Djedidi S, Fukuhara I, Haidari MD, Sekimoto H, Yokoyama T. Evaluation of Immune Responses Induced by Simultaneous Inoculations of Soybean (Glycine max [L.] Merr.) with Soil Bacteria and Rhizobia. Microbes Environ 2019; 34:64-75. [PMID: 30726789 PMCID: PMC6440728 DOI: 10.1264/jsme2.me18110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 11/25/2018] [Indexed: 11/12/2022] Open
Abstract
Legumes form root nodules and fix atmospheric nitrogen by establishing symbiosis with rhizobia. However, excessive root nodules are harmful to plants because of the resulting overconsumption of energy from photosynthates. The delay of an inoculation of the soybean super-nodulation mutant NOD1-3 with Bradyrhizobium diazoefficiens USDA110T by 5 d after an inoculation with several soil bacteria confirmed that one bacterial group significantly decreased root nodules throughout the study period. Moreover, no significant changes were observed in nitrogen fixation by root nodules between an inoculation with USDA 110T only and co-inoculation treatments. To clarify the potential involvement of PR proteins in the restriction of nodule formation in the plants tested, the relative expression levels of PR-1, PR-2, PR-5, and PDF1.2 in NOD1-3 roots were measured using real-time PCR. One group of soil bacteria (Gr.3), which markedly reduced nodule numbers, significantly induced the expression of PR-1, PR-5 and PDF1.2 genes by day 5 after the inoculation. By days 7, 10, and 20 after the inoculation, the expression levels of PR-2 and PR-5 were lower than those with the uninoculated treatment. Inoculations with this group of soil bacteria resulted in lower root nodule numbers than with other tested soil bacteria exerting weak inhibitory effects on nodulation, and were accompanied by the induction of plant defense-related genes. Thus, PR genes appear to play important roles in the mechanisms that suppresses nodule formation on soybean roots.
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Affiliation(s)
- Sayed Ziauddin Hashami
- The United Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT)3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509Japan
| | - Hiroyuki Nakamura
- Faculty of Agriculture, TUAT3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509Japan
| | - Naoko Ohkama-Ohtsu
- Institute of Agriculture, TUAT3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509Japan
| | - Katsuhiro Kojima
- Faculty of Agriculture, TUAT3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509Japan
| | - Salem Djedidi
- Faculty of Agriculture, TUAT3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509Japan
| | - Izumi Fukuhara
- Faculty of Agriculture, TUAT3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509Japan
| | | | - Hitoshi Sekimoto
- Faculty of Agriculture, Utsunomiya University7–1–2 Yoto, Utsunomiya 321–8585Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, TUAT3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509Japan
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7
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Aung HP, Mensah AD, Aye YS, Djedidi S, Oikawa Y, Yokoyama T, Suzuki S, Dorothea Bellingrath-Kimura S. Transfer of radiocesium from rhizosphere soil to four cruciferous vegetables in association with a Bacillus pumilus strain and root exudation. J Environ Radioact 2016; 164:209-219. [PMID: 27517724 DOI: 10.1016/j.jenvrad.2016.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 07/03/2016] [Accepted: 07/05/2016] [Indexed: 06/06/2023]
Abstract
This study was carried out to assess the effect of Bacillus pumilus on the roots of four cruciferous vegetables with different root structures in regard to enhancement of 137Cs bioavailability in contaminated rhizosphere soil. Results revealed that B. pumilus inoculation did not enhance the plant biomass of vegetables, although it increased root volume and root surface areas of all vegetables except turnip. The pH changes due to rhizosphere acidification by B. pumilus inoculation and root exudation did not affect the bioavailability of 137Cs. However, concentrations of 137Cs in plant tissues and soil-to-plant transfer values increased as a result of the larger root volume and root surface area of vegetables due to inoculation. Moreover, leafy vegetables, which possessed larger root volume and root surface areas, had a higher 137Cs transfer value than root vegetables.
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Affiliation(s)
- Han Phyo Aung
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Akwasi Dwira Mensah
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Yi Swe Aye
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Yosei Oikawa
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Sohzoh Suzuki
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
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Djedidi S, Kojima K, Ohkama-Ohtsu N, Bellingrath-Kimura SD, Yokoyama T. Growth and (137)Cs uptake and accumulation among 56 Japanese cultivars of Brassica rapa, Brassica juncea and Brassica napus grown in a contaminated field in Fukushima: Effect of inoculation with a Bacillus pumilus strain. J Environ Radioact 2016; 157:27-37. [PMID: 26986237 DOI: 10.1016/j.jenvrad.2016.02.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 02/18/2016] [Accepted: 02/23/2016] [Indexed: 06/05/2023]
Abstract
Fifty six local Japanese cultivars of Brassica rapa (40 cultivars), Brassica juncea (10 cultivars) and Brassica napus (6 cultivars) were assessed for variability in growth and (137)Cs uptake and accumulation in association with a Bacillus pumilus strain. Field trial was conducted at a contaminated farmland in Nihonmatsu city, in Fukushima prefecture. Inoculation resulted in different responses of the cultivars in terms of growth and radiocesium uptake and accumulation. B. pumilus induced a significant increase in shoot dry weight in 12 cultivars that reached up to 40% in one B. rapa and three B. juncea cultivars. Differences in radiocesium uptake were observed between the cultivars of each Brassica species. Generally, inoculation resulted in a significant increase in (137)Cs uptake in 22 cultivars, while in seven cultivars it was significantly decreased. Regardless of plant cultivar and bacterial inoculation, the transfer of (137)Cs to the plant shoots (TF) varied by a factor of up to 5 and it ranged from to 0.011 to 0.054. Five inoculated cultivars, showed enhanced shoot dry weights and decreased (137)Cs accumulations, among which two B. rapa cultivars named Bitamina and Nozawana had a significantly decreased (137)Cs accumulation in their shoots. Such cultivars could be utilized to minimize the entry of radiocesium into the food chain; however, verifying the consistency of their radiocesium accumulation in other soils is strongly required. Moreover, the variations in growth and radiocesium accumulation, as influenced by Bacillus inoculation, could help selecting well grown inoculated Brassica cultivars with low radiocesium accumulation in their shoots.
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Affiliation(s)
- Salem Djedidi
- Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Katsuhiro Kojima
- Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | - Naoko Ohkama-Ohtsu
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
| | | | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.
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Aung HP, Aye YS, Mensah AD, Omari RA, Djedidi S, Oikawa Y, Ohkama-Ohtsu N, Yokoyama T, Bellingrath-Kimura SD. Relations of fine-root morphology on (137)Cs uptake by fourteen Brassica species. J Environ Radioact 2015; 150:203-212. [PMID: 26355648 DOI: 10.1016/j.jenvrad.2015.08.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 08/28/2015] [Accepted: 08/30/2015] [Indexed: 06/05/2023]
Abstract
Fourteen Brassica species consisting of seven leafy vegetables and seven root vegetables were examined for (137)Cs uptake differences in relation to their fine-root morphological characters. A pot experiment was conducted from November 2014 to February 2015 in a Phytroton using a contaminated soil of Fukushima prefecture. Leafy vegetables showed bigger root diameters, larger root surface area and larger root volume. Consequently, leafy vegetables had higher (137)Cs uptake compared to root vegetables. Among the three fine-root parameters, only root surface area was observed as a significant contributing factor to higher (137)Cs uptake in terms of transfer factor (TF, dry weight basis). Kakina exhibited higher (137)Cs TF value (0.20) followed by Chinese cabbage (0.18) and mizuna (0.17). Lower TF values were observed in turnip (0.059), rutabaga (Kitanoshou) (0.062) and radish (Ha daikon) (0.064).
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Affiliation(s)
- Han Phyo Aung
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
| | - Yi Swe Aye
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
| | - Akwasi Dwira Mensah
- Department of International Environmental and Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
| | - Richard Ansong Omari
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
| | - Yosei Oikawa
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
| | - Naoko Ohkama-Ohtsu
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo, 183-8509, Japan
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Aung HP, Djedidi S, Oo AZ, Aye YS, Yokoyama T, Suzuki S, Sekimoto H, Bellingrath-Kimura SD. Growth and (137)Cs uptake of four Brassica species influenced by inoculation with a plant growth-promoting rhizobacterium Bacillus pumilus in three contaminated farmlands in Fukushima prefecture, Japan. Sci Total Environ 2015; 521-522:261-269. [PMID: 25847170 DOI: 10.1016/j.scitotenv.2015.03.109] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Revised: 03/23/2015] [Accepted: 03/25/2015] [Indexed: 06/04/2023]
Abstract
The effectiveness of the plant growth-promoting rhizobacterium Bacillus pumilus regarding growth promotion and radiocesium ((137)Cs) uptake was evaluated in four Brassica species grown on different (137)Cs contaminated farmlands at Fukushima prefecture in Japan from June to August 2012. B. pumilus inoculation did not enhance growth in any of the plants, although it resulted in a significant increase of (137)Cs concentration and higher (137)Cs transfer from the soil to plants. The Brassica species exhibited different (137)Cs uptake abilities in the order Komatsuna>turnip>mustard>radish. TF values of (137)Cs ranged from 0.018 to 0.069 for all vegetables. Komatsuna possessed the largest root surface area and root volume, and showed a higher (137)Cs concentration in plant tissue and higher (137)Cs TF values (0.060) than the other vegetables. Higher (137)Cs transfer to plants was prominent in soil with a high amount of organic matter and an Al-vermiculite clay mineral type.
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Affiliation(s)
- Han Phyo Aung
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Aung Zaw Oo
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Yi Swe Aye
- Department of International Environmental and Agricultural Science, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Sohzoh Suzuki
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
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Aung HP, Djedidi S, Yokoyama T, Suzuki S, Bellingrath-Kimura SD. Transfer of radiocesium to four cruciferous vegetables as influenced by organic amendment under different field conditions in Fukushima Prefecture. J Environ Radioact 2015; 140:148-155. [PMID: 25483355 DOI: 10.1016/j.jenvrad.2014.11.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 11/11/2014] [Accepted: 11/19/2014] [Indexed: 06/04/2023]
Abstract
Soil-to-plant transfer of radiocesium ((137)Cs) in four cruciferous vegetables as influenced by cattle manure-based compost amendment was investigated. Komatsuna, mustard, radish and turnip were cultivated in three different (137)Cs-contaminated fields at Nihonmatsu City in Fukushima Prefecture from June to August 2012. Results revealed that organic compost amendments stimulated plant biomass production and tended to induce higher (137)Cs concentration in the cruciferous vegetables in most cases. Among the studied sites, Takanishi soil possessing low exchangeable potassium (0.10 cmolc kg(-1)) was associated with an increased concentration of (137)Cs in plants. Radiocesium transfer factor (TF) values of the vegetables ranged from 0.025 to 0.119. The increase in (137)Cs TFs was dependent on larger plant biomass production, high organic matter content, and high sand content in the studied soils. Average (137)Cs TF values for all study sites and compost treatments were higher in Komatsuna (0.072) and radish (0.059), which exhibited a higher biomass production compared to mustard and turnip. The transferability of (137)Cs to vegetables from soils was in the order Komatsuna > radish > mustard > turnip. The highest (137)Cs TF value (0.071) of all vegetables was recorded for a field where the soil had high organic matter content and a high clay proportion of 470 g kg(-1) consisting of Al-vermiculite clay mineral.
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Affiliation(s)
- Han Phyo Aung
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Salem Djedidi
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Tadashi Yokoyama
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
| | - Sohzoh Suzuki
- Institute of Agriculture, Tokyo University of Agriculture and Technology, Saiwaicho 3-5-8, Fuchu, Tokyo 183-8509, Japan
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Djedidi S, Terasaki A, Aung HP, Kojima K, Yamaya H, Ohkama-Ohtsu N, Bellingrath-Kimura SD, Meunchang P, Yokoyama T. Evaluation of the possibility to use the plant-microbe interaction to stimulate radioactive 137Cs accumulation by plants in a contaminated farm field in Fukushima, Japan. J Plant Res 2015; 128:147-159. [PMID: 25398196 DOI: 10.1007/s10265-014-0678-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Accepted: 09/27/2014] [Indexed: 06/04/2023]
Abstract
Field experiments in a contaminated farmland in Nihonmatsu city, Fukushima were conducted to assess the effectiveness of the plant-microbe interaction on removal of radiocesium. Before plowing, 93.3% of radiocesium was found in the top 5 cm layer (5,718 Bq kg DW(-1)). After plowing, Cs radioactivity in the 0-15 cm layer ranged from 2,037 to 3,277 Bq kg DW(-1). Based on sequential extraction, the percentage of available radiocesium (water soluble + exchangeable) was fewer than 10% of the total radioactive Cs. The transfer of (137)Cs was investigated in three agricultural crops; komatsuna (four cultivars), Indian mustard and buckwheat, inoculated with a Bacillus or an Azospirillum strains. Except for komatsuna Nikko and Indian mustard, inoculation with both strains resulted in an increase of biomass production by the tested plants. The highest (137)Cs radioactivity concentration in above-ground parts was found in Bacillus-inoculated komatsuna Nikko (121 Bq kg DW(-1)), accompanied with the highest (137)Cs TF (0.092). Furthermore, komatsuna Nikko-Bacillus and Indian mustard-Azospirillum associations gave the highest (137)Cs removal, 131.5 and 113.8 Bq m(-2), respectively. Despite the beneficial effect of inoculation, concentrations of (137)Cs and its transfer to the tested plants were not very high; consequently, removal of (137)Cs from soil would be very slow.
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Affiliation(s)
- Salem Djedidi
- Department of Biological Production Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-chou, Fuchu, Tokyo, 183-8509, Japan
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13
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Djedidi S, Kojima K, Yamaya H, Ohkama-Ohtsu N, Bellingrath-Kimura SD, Watanabe I, Yokoyama T. Stable cesium uptake and accumulation capacities of five plant species as influenced by bacterial inoculation and cesium distribution in the soil. J Plant Res 2014; 127:585-597. [PMID: 25002227 DOI: 10.1007/s10265-014-0647-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 04/25/2014] [Indexed: 06/03/2023]
Abstract
The effects of inoculation with Bacillus and Azospirillum strains on growth and cesium accumulation of five plant species, Komatsuna, Amaranth, sorghum, common millet and buckwheat, grown on cesium-spiked soil were assessed for potential use in cesium remediation. Pot experiments were performed using "artificially" Cs-contaminated soil. Three treatments were applied based on Cs location in the soil. For a soil height of 15 cm in the pots, Cs was added as follows: in the top five cm to imitate no ploughing condition; in the bottom five cm simulating inverted ploughing; and uniformly distributed Cs reproducing normal plowing. Generally, inoculation of Cs-exposed plants significantly enhanced growth and tolerance to this element. Transfer factor (ratio of Cs concentration in the plant tissues to that in surrounding soil) was strongly influenced by Cs distribution, with higher values in the top-Cs treatment. Within this treatment, inoculation of Komatsuna with Bacillus and Azospirillum strains resulted in the greatest transfer factors of 6.55 and 6.68, respectively. Cesium content in the shoots was high in the Azospirillum-inoculated Komatsuna, Amaranth, and buckwheat, i.e., 1,830, 1,220, and 1,030 µg per pot, respectively (five plants were grown in each pot). Therefore, inoculation of Komatsuna and Amaranth with the strains tested here could be effective in enhancing Cs accumulation. The decrease of Cs transfer under uniform- and bottom-Cs treatments would suggest that countermeasures aiming at decreasing the transfer of Cs could rely on ploughing practices.
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Affiliation(s)
- Salem Djedidi
- Department of Biological Production Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-chou, Fuchu, Tokyo, 183-8509, Japan
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14
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Djedidi S, Yokoyama T, Tomooka N, Ohkama-Ohtsu N, Risal CP, Abdelly C, Sekimoto H. Phenotypic and genetic characterization of rhizobia associated with alfalfa in the Hokkaido and Ishigaki regions of Japan. Syst Appl Microbiol 2012; 34:453-61. [PMID: 21684705 DOI: 10.1016/j.syapm.2011.04.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Revised: 04/01/2011] [Accepted: 04/04/2011] [Indexed: 11/30/2022]
Abstract
Twenty five rhizobial isolates were obtained from root nodules of Medicago sativa inoculated with soil samples collected from the Sapporo region and Ishigaki Island in Japan. To study their diversity and characterize them in relation to the climatic conditions of their soils of origin, a polyphasic approach analyzing stress tolerance, symbiotic and genetic properties was used. Stress tolerance assays revealed marked variations in salinity, pH and temperature tolerance. Isolates originating from a sub-tropical climate in alkaline soil (Ishigaki Island) tolerated high temperature, salinity and pH levels. Moreover, isolates recovered from a temperate climate in acidic soil (Sapporo) were sensitive to high temperature and salinity, and tolerated acidic pH. Phylogenetic analysis of conserved 16S rRNA and recA genes, and symbiotic nodA and nifDK revealed 25 isolates to be closely related to Ensifer meliloti. Furthermore, the branch patterns of phylogenetic trees constructed from different genes revealed the existence of at least two E. meliloti types in the soils studied. These results may be relevant to programs directed towards improving crop productivity through biofertilization with locally adapted and genetically defined strains.
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Affiliation(s)
- Salem Djedidi
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan
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15
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Risal CP, Djedidi S, Dhakal D, Ohkama-Ohtsu N, Sekimoto H, Yokoyama T. Phylogenetic diversity and symbiotic functioning in mungbean (Vigna radiata L. Wilczek) bradyrhizobia from contrast agro-ecological regions of Nepal. Syst Appl Microbiol 2011; 35:45-53. [PMID: 22178390 DOI: 10.1016/j.syapm.2011.06.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2011] [Revised: 06/13/2011] [Accepted: 06/15/2011] [Indexed: 11/16/2022]
Abstract
Nepal consists wide range of climatic and topographical variations. Here, we explored the phylogeny of native mungbean bradyrhizobia isolated from different agro-ecological regions of Nepal and accessed their nodulation and nitrogen fixation characteristics. Soil samples were collected from three agro-ecological regions with contrasting climate and topography. A local mungbean cultivar, Kalyan, was used as a trap plant. We characterized isolates based on the full nucleotide sequence of the 16S rRNA, ITS region, and nodA genes; and partial sequences of nodD1 and nifD genes. We found 50% of isolates phylogenetically related to B. yuanmingense, 13% to B. japonicum, 8% to B. elkanii, and 29% to novel phylogenetic origin. Results of the inoculation test suggested that expression of different symbiotic genes in isolates resulted in different degrees of symbiotic functioning. Our results indicate B. yuanmingense and novel strains are more efficient symbiotic partners than B. elkanii for the local mungbean cv. Kalyan. We also found most mungbean rhizobial genotypes were conserved across agro-ecological regions. All the strains from tropical Terai region belonged to B. yuanmingense or a novel lineage of B. yuanmingense, and dominance of B. japonicum related strains was observed in the Hill region. Higher genetic diversity of Bradyrhizobium strains was observed in temperate and sub-tropical region than in the tropical region.
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Affiliation(s)
- Chandra Prasad Risal
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, 183-8509, Japan
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16
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Djedidi S, Yokoyama T, Ohkama-Ohtsu N, Risal CP, Abdelly C, Sekimoto H. Stress tolerance and symbiotic and phylogenic features of root nodule bacteria associated with Medicago species in different bioclimatic regions of Tunisia. Microbes Environ 2011; 26:36-45. [PMID: 21487201 DOI: 10.1264/jsme2.me10138] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Thirty two rhizobial isolates were obtained from different bioclimatic regions of Tunisia using as trap plants, Medicago sativa, Medicago ciliaris, Medicago polymorpha and Medicago minima. To study their diversity and characterize them in relation to Mediterranean conditions, abiotic stress resistance, symbiotic properties and genetic diversity in terms of 16S rRNA and nodA sequences were assessed. Five isolates from M. sativa, three from M. ciliaris and three from M. minima could grow at 45°C. Only two isolates from M. sativa grew at 4% NaCl. The most stress tolerant isolates were obtained from arid soils. A phylogenetic analysis of 16S rRNA genes revealed 29 isolates to be closely related to Ensifer including one (Pl.3-9) that showed a 16S rRNA sequence similar to that of Ensifer meliloti and nodA sequence similar to that of Ensifer medicae. However, three isolates were categorized into Agrobacterium containing the nodA of Ensifer. Furthermore, these isolates developed nodules on original hosts. The results for the four isolates suggest horizontal gene transfer between the species.
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Affiliation(s)
- Salem Djedidi
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, 3–5–8 Saiwai-cho, Fuchu, Tokyo 183–8509, Japan
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17
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Risal CP, Yokoyama T, Ohkama-Ohtsu N, Djedidi S, Sekimoto H. Genetic diversity of native soybean bradyrhizobia from different topographical regions along the southern slopes of the Himalayan Mountains in Nepal. Syst Appl Microbiol 2010; 33:416-25. [PMID: 20851547 DOI: 10.1016/j.syapm.2010.06.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2010] [Revised: 06/11/2010] [Accepted: 06/17/2010] [Indexed: 11/29/2022]
Abstract
Soybean-nodulating bradyrhizobia are genetically diverse and are classified into different species. In this study, the genetic diversity of native soybean bradyrhizobia isolated from different topographical regions along the southern slopes of the Himalayan Mountains in Nepal was explored. Soil samples were collected from three different topographical regions with contrasting climates. A local soybean cultivar, Cobb, was used as a trap plant to isolate bradyrhizobia. A total of 24 isolates selected on the basis of their colony morphology were genetically characterized. For each isolate, the full nucleotide sequence of the 16S rRNA gene and ITS region, and partial sequences of the nifD and nodD1 genes were determined. Two lineages were evident in the conserved gene phylogeny; one representing Bradyrhizobium elkanii (71% of isolates), and the other representing Bradyrhizobium japonicum (21%) and Bradyrhizobium yuanmingense (8%). Phylogenetic analyses revealed three novel lineages in the Bradyrhizobium elkanii clade, indicating high levels of genetic diversity among Bradyrhizobium isolates in Nepal. B. japonicum and B. yuanmingense strains were distributed in areas from 2420 to 2660 m above sea level (asl), which were mountain regions with a temperate climate. The B. elkanii clade was distributed in two regions; hill regions ranging from 1512 to 1935 m asl, and mountain regions ranging from 2420 to 2660 m asl. Ten multi-locus genotypes were detected; seven among B. elkanii, two among B. japonicum, and one among B. yuanmingense-related isolates. The results indicated that there was higher species-level diversity of Bradyrhizobium in the temperate region than in the sub-tropical region along the southern slopes of the Himalayan Mountains in Nepal.
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Affiliation(s)
- Chandra Prasad Risal
- United Graduate School of Agri. Science, Tokyo Univ. of Agri. and Tech., Tokyo 183-8509, Japan
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Zaiem A, Djedidi S, Ben Abdallah K, Ayed K, Boussen S, Hamza M, Haddad S. [Acute lymphoblastic transformation of chronic myeloid leukemia]. Tunis Med 1983; 61:283-6. [PMID: 6597988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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19
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Djedidi S, Ben Khalifa F, Kamoun S, Ayed K, Ben Ayed H. [Association of Basedow's disease and myasthenia: apropos of a case]. Tunis Med 1981; 59:133-7. [PMID: 6894813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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