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Khuong NQ, Nhat NM, Thu LTM, Thuc LV. Influence of purple non-sulfur bacterial augmentation on soil nutrient dynamics and rice ( Oryza sativa) growth in acidic saline-stressed environments. PeerJ 2024; 12:e16943. [PMID: 38770100 PMCID: PMC11104354 DOI: 10.7717/peerj.16943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 01/24/2024] [Indexed: 05/22/2024] Open
Abstract
The aim of the current study was to assess the potency of the exopolymeric substances (EPS)-secreting purple non-sulfur bacteria (PNSB) on rice plants on acidic salt-affected soil under greenhouse conditions. A two-factor experiment was conducted following a completely randomized block design. The first factor was the salinity of the irrigation, and the other factor was the application of the EPS producing PNSB (Luteovulum sphaeroides EPS18, EPS37, and EPS54), with four replicates. The result illustrated that irrigation of salt water at 3-4‰ resulted in an increase in the Na+ accumulation in soil, resulting in a lower rice grain yield by 12.9-22.2% in comparison with the 0‰ salinity case. Supplying the mixture of L. sphaeroides EPS18, EPS37, and EPS54 increased pH by 0.13, NH4+ by 2.30 mg NH4+ kg-1, and available P by 8.80 mg P kg-1, and decreased Na+ by 0.348 meq Na+ 100 g-1, resulting in improvements in N, P, and K uptake and reductions in Na uptake, in comparison with the treatment without bacteria. Thus, the treatments supplied with the mixture of L. sphaeroides EPS18, EPS37, and EPS54 resulted in greater yield by 27.7% than the control treatment.
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Affiliation(s)
| | - Nguyen Minh Nhat
- College of Agriculture, Can Tho University, Ninh Kieu, Can Tho, Vietnam
| | - Le Thi My Thu
- College of Agriculture, Can Tho University, Ninh Kieu, Can Tho, Vietnam
| | - Le Vinh Thuc
- College of Agriculture, Can Tho University, Ninh Kieu, Can Tho, Vietnam
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Khuong NQ, Trong ND, Quang LT, Xuan LNT, Phong NT. The potency of a liquid biofertilizer containing bacterial strains of Rhodopseudomonas spp. on recovery of soil properties damaged by Al 3+ and Fe 2+ toxins and enhancement of rice yield in acid sulfate soil. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2023; 26:535-545. [PMID: 37668058 DOI: 10.1080/15226514.2023.2253913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
In the Mekong Delta Vietnam, rice is heavily affected by Al3+ and Fe2+ ions appearing in local acid sulfate soils (AAS). Therefore, the current study was carried out to assess the efficacy of a liquid biofertilizer (LB) containing nitrogen-fixing and phosphorus-solubilizing bacterial strains of Rhodopseudomonas spp. on remediation of soil characteristics and improvements of rice uptakes, growth, and yield. The experiment was designed in a randomized block design with nine treatments and four replications in an ASS. The results have shown that the LB application could contribute to the remediation of soil properties, including an increase in concentrations of NH4+ by 12.9%-19.4%, soluble P by 25.7%-42.6%, total N uptake by 40.7-64.0 kg ha-1 and total P uptake by 5.60-12.6 kg ha-1, and a decrease in concentrations of toxins, such as Al3+ by 12.1%-19.7% and Fe2+ by 16.6%-19.0%, compared to the treatment with the farmer-based fertilization. Thereby, grain yield was improved by 31.9%-32.2% with the LB versus the treatments without the bacteria and by 9.5%-11.1% compared to the commercial biofertilizer treatments. The application of LB reduced 25% N and 50% P of the recommendation versus the farmers' fertilization and improved performance of rice growth and yield cultivated on ASS which suffered from Al3+ and Fe2+ ions.
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Affiliation(s)
- Nguyen Quoc Khuong
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho, Vietnam
| | - Nguyen Duc Trong
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho, Vietnam
| | - Le Thanh Quang
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho, Vietnam
| | - Ly Ngoc Thanh Xuan
- Experimental and Practical Area, An Giang University, An Giang, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Ngo Thanh Phong
- Department of Biology, College of Natural Sciences, Can Tho University, Can Tho, Vietnam
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Khuong NQ, Sakpirom J, Oanh TO, Thuc LV, Thu LTM, Xuan DT, Quang LT, Xuan LNT. Isolation and characterization of novel potassium-solubilizing purple nonsulfur bacteria from acidic paddy soils using culture-dependent and culture-independent techniques. Braz J Microbiol 2023; 54:2333-2348. [PMID: 37507640 PMCID: PMC10484875 DOI: 10.1007/s42770-023-01069-0] [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: 03/11/2023] [Accepted: 07/15/2023] [Indexed: 07/30/2023] Open
Abstract
The current research as aimed (i) to isolate and select the purple nonsulfur bacteria (PNSB) possessing the potassium-solubilizing ability from acid paddy fields and (ii) to evaluate the ability to release the plant growth-promoting substances (PGPS) of selected PNSB. A total of 35 acid sulfate (AS) soil samples were collected in An Giang province, Vietnam. Then, 70 PNSB strains were isolated from the AS soil samples. In the current study, the isolated strains were screened and selected according to their tolerability to acidic conditions, ability to solubilize potassium, and characteristics of a plant growth promoter on basic isolation media with various incubation conditions. Therein, three strains, TT07.4, AN05.1, and AC04.1, presented the highest potassium solubilization under the microaerobic light (11.8-17.7 mg L-1) and aerobic dark (16.4-24.7 mg L-1) conditions and stresses from Al3+, Fe2+, and Mn2+ toxicity. The selected strains were identified as Rhodopseudomonas pentothenatexigens by the 16S rDNA sequence, with 99% similarity. The selected acidic-resistant strains possessed the traits of biofertilizers under both microaerobic light and aerobic dark conditions, with abilities to fix nitrogen (0.17-6.24; 7.93-11.2 mg L-1); solubilize phosphorus from insoluble compounds with 3.22-49.9 and 9.49-11.2 mg L-1 for Al-P, 21.9-25.8 and 20.2-25.1 mg L-1 for Ca-P, and 10.1-29.8 and 18.9-23.2 mg L-1 for Fe-P; produce 5-aminolevulinic acid (0.63-3.01; 1.19-6.39 mg L-1), exopolymeric substances (0.14-0.76; 0.21-0.86 mg L-1), indole-3-acetic acid (12.9-32.6; 13.6-17.8 mg L-1), and siderophores (28.4-30.3; 6.15-10.3%). The selected potassium-solubilizing strains have a great potential to apply in liquid form into rice seed and solid form in AS soils to supply nutrients and PGPS for enhancing rice growth and grain yield.
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Affiliation(s)
- Nguyen Quoc Khuong
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho, Vietnam
| | - Jakkapan Sakpirom
- Department of Science, Demonstration School of Phetchaburi Rajabhat University, Phetchaburi Rajabhat University, Phetchaburi, Thailand
| | - Truong Oanh Oanh
- Institute of Food and Biotechnology, Can Tho University, Can Tho, Vietnam
| | - Le Vinh Thuc
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho, Vietnam
| | - Le Thi My Thu
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho, Vietnam
| | - Do Thi Xuan
- Institute of Food and Biotechnology, Can Tho University, Can Tho, Vietnam
| | - Le Thanh Quang
- Institute of Food and Biotechnology, Can Tho University, Can Tho, Vietnam
| | - Ly Ngoc Thanh Xuan
- Experimental and Practical Area, An Giang University, An Giang, Vietnam; Vietnam National University, Ho Chi Minh City, Vietnam
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Khuong NQ, Thuc LV, Giang CT, Xuan LNT, Thu LTM, Isao A, Jun-Ichi S. Improvement of Nutrient Uptake, Yield of Black Sesame ( Sesamum indicum L.), and Alluvial Soil Fertility in Dyke by Spent Rice Straw from Mushroom Cultivation as Biofertilizer Containing Potent Strains of Rhodopseudomonas palustris. ScientificWorldJournal 2023; 2023:1954632. [PMID: 37138904 PMCID: PMC10151153 DOI: 10.1155/2023/1954632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 03/24/2023] [Accepted: 04/05/2023] [Indexed: 05/05/2023] Open
Abstract
The aim of the current research was to evaluate the effects of members of purple nonsulfur bacteria (PNSB), Rhodopseudomonas palustris strains of VNW02, TLS06, VNW64, and VNS89, mixed with spent rice straw (SRS) from mushroom cultivation as a carrier on promoting sesame growth and yield, and ameliorating the alluvial soil (AS) fertility in dykes. A 4 × 3 factorial experiment consisting of different levels of the solid PNSB biofertilizer mixture at 0, 3, 4, and 5 t·ha-1 (0, 1.81 × 108, 2.24 × 108, and 2.68 × 108 cells pot-1, respectively), and nitrogen (N) and phosphorus (P) inorganic fertilizer rates (100, 75, and 50 kg·N·ha-1; 60, 45, and 30 kg P2O5·ha-1, respectively) was performed in pots with the sesame variety of ADB1 in the dyked AS. The solid PNSB biofertilizer mixture at at least 3 t·ha-1 significantly enhanced the sesame seed yield by providing higher macronutrients for plants by increasing available N and soluble P concentrations in the soil. The solid PNSB biofertilizer mixture in addition to 75% of the recommended N and P fertilizers produced an equivalent yield in comparison to the utilized 100% of N and P inorganic fertilizers. The solid PNSB biofertilizer mixture in the SRS from the mushroom production reduced at least 25% of N and P chemical fertilizers for gaining the maximal seed yield and enriched soil characteristics for the sustainable black sesame cultivation in the dyked AS.
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Affiliation(s)
- Nguyen Quoc Khuong
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho 94000, Vietnam
| | - Le Vinh Thuc
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho 94000, Vietnam
| | - Cao Tien Giang
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho 94000, Vietnam
| | - Ly Ngoc Thanh Xuan
- Experimental and Practical Area, An Giang University, Long Xuyen, An Giang 90000, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Le Thi My Thu
- Faculty of Crop Science, College of Agriculture, Can Tho University, Can Tho 94000, Vietnam
| | - Akagi Isao
- Faculty of Agriculture, Kagoshima University, Kagoashima 890-8580, Japan
| | - Sakagami Jun-Ichi
- Faculty of Agriculture, Kagoshima University, Kagoashima 890-8580, Japan
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WeiXie L, Yang R, Liu B, Lei N, Peng S, Li J, Tong J, Deng R, Li J. Effects of Pb-, Cd-resistant bacterium Pantoea sp. on growth, heavy metal uptake and bacterial communities in oligotrophic growth substrates of Lolium multiflorum Lam. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:50742-50754. [PMID: 35237915 DOI: 10.1007/s11356-022-19180-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 02/08/2022] [Indexed: 06/14/2023]
Abstract
Phosphate-solubilizing bacteria (PSB) can accelerate phytoremediation, especially in those fertilized soils. However, PSB function in oligotrophic growth substrates remains poorly studied. In this study, we isolated lead (Pb)- and cadmium (Cd)-resistant PSB from contaminated sandy soil at an abandoned lubricant plant. The isolated Pantoea sp. PP4 (PP4 hereafter) can produce organic acid and IAA (Indole-3-acetic acid) and dissolve up to 238 mg/L of inorganic phosphate Ca2(PO4)3, exhibiting biosorption capability for Pb and bioprecipitation for Pb and Cd. In the sand pot experiment, inoculation of PP4 increased the accumulation of Pb and Cd in Lolium multiflorum Lam. by 28.9% and 95.5%, respectively, and increased the available phosphorous in oligotrophic river sand by 30.8% (P < 0.05). Meanwhile, the growth of Lolium multiflorum Lam. was also stimulated, resulting in 89.2%, 57.1%, 184.6%, and 28.5% increase in fresh weight, dry weight, root length, and shoot length, respectively. NMDS analysis showed that the bacterial communities in river sand were more clustered after inoculation with PP4. These results indicated that the application of Pantoea sp. PP4 can facilitate the phytoremediation of Pb and Cd in oligotrophic growth substrates, forming a convergent bacterial community. Our findings highlighted the importance of identifying ideal PSB to improve phytoremediation efficiency in oligotrophic environments.
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Affiliation(s)
- Luyao WeiXie
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Ruilan Yang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Boyu Liu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Ningfei Lei
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Shuming Peng
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Jingji Li
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Jin Tong
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Ran Deng
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China
| | - Jing Li
- College of Ecology and Environment, Chengdu University of Technology, Chengdu, 610059, People's Republic of China.
- State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu, 610059, People's Republic of China.
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