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Li R, Jiao H, Sun B, Song M, Yan G, Bai Z, Wang J, Zhuang X, Hu Q. Understanding Salinity-Driven Modulation of Microbial Interactions: Rhizosphere versus Edaphic Microbiome Dynamics. Microorganisms 2024; 12:683. [PMID: 38674627 PMCID: PMC11052110 DOI: 10.3390/microorganisms12040683] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 03/16/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024] Open
Abstract
Soil salinization poses a global threat to terrestrial ecosystems. Soil microorganisms, crucial for maintaining ecosystem services, are sensitive to changes in soil structure and properties, particularly salinity. In this study, contrasting dynamics within the rhizosphere and bulk soil were focused on exploring the effects of heightened salinity on soil microbial communities, evaluating the influences shaping their composition in saline environments. This study observed a general decrease in bacterial alpha diversity with increasing salinity, along with shifts in community structure in terms of taxa relative abundance. The size and stability of bacterial co-occurrence networks declined under salt stress, indicating functional and resilience losses. An increased proportion of heterogeneous selection in bacterial community assembly suggested salinity's critical role in shaping bacterial communities. Stochasticity dominated fungal community assembly, suggesting their relatively lower sensitivity to soil salinity. However, bipartite network analysis revealed that fungi played a more significant role than bacteria in intensified microbial interactions in the rhizosphere under salinity stress compared to the bulk soil. Therefore, microbial cross-domain interactions might play a key role in bacterial resilience under salt stress in the rhizosphere.
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Affiliation(s)
- Rui Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou 256606, China;
| | - Haihua Jiao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- Department of Biological Sciences and Technology, Changzhi University, Changzhi 046011, China
| | - Bo Sun
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Manjiao Song
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gaojun Yan
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhihui Bai
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jiancheng Wang
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou 256606, China;
| | - Xuliang Zhuang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Qing Hu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; (R.L.); (H.J.); (B.S.); (M.S.); (G.Y.); (Z.B.); (X.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Xiongan Innovation Institute, Xiongan New Area, Baoding 071000, China
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Guo Z, Ye W, Wang H, He W, Tian Y, Hu G, Lou Y, Pan H, Yang Q, Zhuge Y. Straw and phosphorus applications promote maize ( Zea mays L.) growth in saline soil through changing soil carbon and phosphorus fractions. Front Plant Sci 2024; 15:1336300. [PMID: 38313806 PMCID: PMC10835382 DOI: 10.3389/fpls.2024.1336300] [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] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 01/03/2024] [Indexed: 02/06/2024]
Abstract
Introduction Straw return has been widely recognized as an important carbon (C) enhancement measure in agroecosystems, but the C-phosphorus (P) interactions and their effects on plants in saline soils are still unclear. Methods In this study, we investigated the effects of straw return and three P application levels, no P fertilizer (Non-P), a conventional application rate of P fertilizer (CP), and a high application rate of P fertilizer (HP), on maize growth and soil C and P fractions through a pot experiment. Results and discussion The results revealed that the dry matter weight of maize plant was no difference between the two straw return levels and was 15.36% higher under HP treatments than under Non-P treatments. Plant nutrient accumulations were enhanced by straw addition and increased with increasing P application rate. Straw application reduced the activities of peroxidase (POD), superoxide dismutase (SOD), catalase, and the content of malondialdehyde (MDA) in maize plants by 31.69%, 38.99%, 45.96% and 27.04%, respectively. P application decreased SOD, POD activities and MDA content in the absence of straw. The contents of easily oxidized organic carbon (EOC), particulate organic carbon (POC) and the ratio of POC/SOC in straw-added soils were 10.23%, 17.00% and 7.27% higher, respectively, than those in straw-absent soils. Compared with Non-P treatments, HP treatments led to an increase of 12.05%, 23.04% in EOC, POC contents respectively, while a decrease of 18.12% in the contribution of MAOC to the SOC pool. Straw return improved the P status of the saline soil by increasing soil available P (14.80%), organic P (35.91%) and Ca2-P contents (4.68%). The structural equation model showed that straw and P applications could promote maize growth (indicated by dry matter weight, P accumulation, antioxidant enzyme activity and MDA content) through improving soil C and P availabilities. Conclusion This study provides evidence that straw return together with adequate P supply in saline soil can promote crop nutrient accumulation, attenuate the oxidation damage on crop growth, and be beneficial for SOC turnover and soil P activation.
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Affiliation(s)
- Zhenxin Guo
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Wenhua Ye
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Hui Wang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Wei He
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
- Observation and Research Station of Land Use Security in the Yellow River Delta, Ministry of Natural Resources (NMR), Shandong Provincial Territorial Spatial Ecological Restoration Center, Jinan, China
| | - Yanling Tian
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Guoqing Hu
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Yanhong Lou
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Hong Pan
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Quangang Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
| | - Yuping Zhuge
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Taian, China
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Hu Y, Ma X, Li XX, Tan S, Cheng M, Hou J, Cui HL. Halomicrococcus gelatinilyticus sp. nov. and Halosimplex aquaticum sp. nov., halophilic archaea isolated from saline soil and an inland solar saltern. Int J Syst Evol Microbiol 2024; 74. [PMID: 38197785 DOI: 10.1099/ijsem.0.006231] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2024] Open
Abstract
Two extremely halophilic archaeal strains, GSLN9T and XZYJT29T, were isolated from the saline soil in different regions of western China. Both strains GSLN9T and XZYJT29T have two 16S rRNA genes with similarities of 95.1 and 94.8 %, respectively. Strain GSLN9T was mostly related to the genus Halomicrococcus based on 16S rRNA (showing 91.0-96.0 % identities) and rpoB' genes (showing 92.0 % identity). Strain XZYJT29T showed 92.1-97.6 % (16S rRNA gene) and 91.4-93.1 % (rpoB' gene) sequence similarities to its relatives in the genus Halosimplex, respectively. The polar lipid profile of strain GSLN9T included phosphatidic acid (PA), phosphatidylglycerol (PG), phosphatidylglycerol phosphate methyl ester (PGP-Me), phosphatidylglycerol sulphate (PGS), sulphated mannosyl glucosyl diether (S-DGD-1) and sulphated galactosyl mannosyl glucosyl diether (S-TGD-1), mostly similar to that of Halomicrococcus hydrotolerans H22T. PA, PG, PGP-Me, S-DGD-1 (S-DGD-PA), S2-DGD, S-TGD-1 and an unidentified glycolipid were detected in strain XZYJT29T; this polar lipid composition is similar to those of members of the genus Halosimplex. The average nucleotide identity, digital DNA-DNA hybridization and average amino acid identity values between these two strains and their relatives of the genera Halomicrococcus and Halosimplex were no more than 82, 27 and 80 %, respectively, much lower than the thresholds for species demarcation. Other phenotypic characterization results indicated that strains GSLN9T and XZYJT29T can be differentiated from the current species of the genera Halomicrococcus and Halosimplex, respectively. These results revealed that strains GSLN9T (=CGMCC 1.15215T=JCM 30842T) and XZYJT29T (=CGMCC 1.15828T=JCM 31853T) represent novel species of Halomicrococcus and Halosimplex, for which the names Halomicrococcus gelatinilyticus sp. nov. and Halosimplex aquaticum sp. nov. are proposed.
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Affiliation(s)
- Yao Hu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xue Ma
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xin-Xin Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Shun Tan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Mu Cheng
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Jing Hou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Heng-Lin Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
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Wu S, Zhang Z, Sun H, Hu H. Responses of Rice Yield, N Uptake, NH 3 and N 2O Losses from Reclaimed Saline Soils to Varied N Inputs. Plants (Basel) 2023; 12:2446. [PMID: 37447008 PMCID: PMC10347052 DOI: 10.3390/plants12132446] [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] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/15/2023]
Abstract
It is of agronomic importance to apply nitrogen (N), but it has high environmental risks in reclaimed saline soils. Therefore, we should apply N fertilizer at an appropriate rate to increase crop yield but decrease N losses. In this soil column experiment, rice yield, N uptake, and ammonia (NH3) and nitrous oxide (N2O) losses were measured in four treatments with no N application (control) and with N applications of 160, 200, and 240 kg/ha (N160, N200, and N240, respectively). The results show that grain yield, spike number, and thousand-kernel weight increased with increases in N application rate, but there was no significant difference in grain yield between N200 and N240. However, the kernels per spike increased first and then decreased with the increase in N application, of which N200 was recorded to have the highest kernels per spike value, which was 16.8 and 9.8% higher than those of N160 and N240, respectively. Total NH3 volatilization of the rice season increased with increasing N input, especially during the first and second supplementary fertilization stages. The NH4+-N concentration of overlying water was relatively lower under the N200 treatment in these two stages, and the yield-scaled NH3 volatilization and the emission factor were the lowest in N200, which were 26.2-27.8% and 4.0-21.0% lower than those of N160 and N240, respectively. Among the three N-applied treatments, N2O losses and the emission factor as well as the yield-scaled N2O emissions were the lowest under the N200 treatment, which had 34.7% and 78.9% lower N2O emissions and 57.8% and 83.5% lower emission factors than those of the N160 and N240 treatments, respectively. Moreover, the gene copies of AOA and AOB amoA, nirS, and nirK in cultivated layer soils all reached the minimum under the N200 treatment. According to the comprehensive effects of N fertilizer on rice grain yield and NH3 and N2O losses, we recommend applying 200 kg/ha to reclaimed saline soil to ensure crop yield and reduce N losses.
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Affiliation(s)
- Si Wu
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China; (S.W.); (H.H.)
| | - Zhenhua Zhang
- Jiangsu Key Laboratory for Bioresource of Saline Soils, School of Wetlands, Yancheng Teachers University, Yancheng 224007, China;
- School of Agriculture and Environment, The University of Western Australia, Crawley, WA 6009, Australia
| | - Haijun Sun
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China; (S.W.); (H.H.)
| | - Haibo Hu
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, Nanjing 210037, China; (S.W.); (H.H.)
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ul Aibdin Z, Nafees M, Rizwan M, Ahmad S, Ali S, Obaid WA, Alsubeie MS, Darwish DBE, Abeed AHA. Combined effect of Zinc lysine and biochar on growth and physiology of wheat ( Triticum aestivum L.) to alleviate salinity stress. Front Plant Sci 2023; 13:1017282. [PMID: 36994320 PMCID: PMC10042136 DOI: 10.3389/fpls.2022.1017282] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 10/21/2022] [Indexed: 06/19/2023]
Abstract
Globally, Food security main threaten by abiotic stress like salinity and levels amongst the majority serious environmental stressors which reduce crop yield mass production. Biochar application has received much attention in agricultural practices as it enhances crop quality and production. The present study was carried out to analyze the role of lysine zinc and biochar on growth enhancement of wheat (Triticum aestivum L. cv. PU-2011) under saline stress (EC 7.17 dSm-1). Seeds were sown in pots containing saline soil with and without 2% biochar, and foliar application of Zn-lysine (0, 1.0, and 2.0 mM) was made at different time intervals during plant growth. A combined application of biochar and Zn-lysine 2.0 mM highly improved the physiological attributes such as chlorophyll a (37%), chlorophyll b (60%), total chlorophyll (37%), carotenoids (16%), photosynthesis rate (Pn) 45%, stomatal conductance (gs) 53%, transpiration rate (Tr) 56%, and water use efficiency (WUE) 55%. The levels of malondialdehyde (MDA) 38%, hydrogen peroxide (H2O2) 62%, and electrolyte leakage (EL) 48% were decreased with the combined application of biochar and Zn-lysine 2.0 mM as compared with other treatments. The activities of catalase (CAT) 67%, superoxide dismutase (SOD) 70%, and ascorbate peroxidase (APX) 61% as well as catalase (CAT) 67% were regulated with the combined biochar and Zn-lysine 2.0 mM treatment. Similarly, the combined application of biochar and zinc-lysine (2.0 mM) enhanced the growth and yield attributes such as shoot length (79%), root fresh weight (62%), shoot fresh weight (36%), root dry weight (86%), shoot dry weight (39%), grain weight (57%), and spike length (43%) as compared with untreated control. The concentrations of sodium (Na) decreased whereas potassium (K), iron (Fe), and zinc (Zn) concentrations were enhanced in plants with the combined application of Zn-lysine and biochar. Overall, results showed that the combined application of Zn-lysine (2.0 mM) and biochar significantly inhibited the negative effect of salinity and improved the growth and physiological performance of wheat plants. The combined use of Zn-lysine and biochar might be a practical solution to tackle salt stress in plants, but field studies by growing various crops under varied environmental conditions are needed before any recommendation to farmers.
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Affiliation(s)
- Zain ul Aibdin
- Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, Punjab, Pakistan
| | - Muhammad Nafees
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, China
| | - Muhammad Rizwan
- Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, Punjab, Pakistan
| | - Shoaib Ahmad
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, China
| | - Shafaqat Ali
- Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, Punjab, Pakistan
- Department of Biological Sciences and Technology, China Medical University, Taichung, Taiwan
| | - Wael A. Obaid
- Department of Biology, College of Science, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Moodi Saham Alsubeie
- Biology Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
| | - Doaa Bahaa Eldin Darwish
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk, Saudi Arabia
- Botany Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Amany H. A. Abeed
- Department of Botany and Microbiology, Faculty of Science, Assiut University, Assiut, Egypt
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Wang S, Ge S, Mai W, Tian C. Nitrogen Promotes the Salt-Gathering Capacity of Suaeda salsa and Alleviates Nutrient Competition in the Intercropping of Suaeda salsa/ Zea mays L. Int J Mol Sci 2022; 23:ijms232415495. [PMID: 36555131 PMCID: PMC9779500 DOI: 10.3390/ijms232415495] [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] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/04/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022] Open
Abstract
Nitrogen accelerates salt accumulation in the root zone of an euhalophyte, which might be beneficial for inhibiting the salt damage and interspecific competition for nutrients of non-halophytes in intercropping. However, the variations in the effect of euhalophyte/non-halophyte intercropping with nitrogen supply are poorly understood. Here, we selected the euhalophyte Suaeda salsa (suaeda) and non-halophyte Zea mays L. (maize) as the research objects, setting up three cropping patterns in order to explore the influence of nitrogen application on the intercropping effect in the suaeda/maize intercropping. The results showed that the biomass of maize in the intercropping was significantly lower than that in the monoculture, while for suaeda, it was higher in the intercropping than that in the monoculture. The biomass of maize under NO3--N treatment performed significantly higher than that under no nitrogen treatment. Moreover, under suitable NO3--N treatment, more salt ions (Na+, K+) gathered around the roots of suaeda, which weakened the salt damage on maize growth. In the intercropping, the effect of NO3--N on the maize growth was enhanced when compared with the non-significant effect of NH4+-N, but a positive effect of NH4+-N on suaeda growth was found. Therefore, the disadvantage of maize growth in the intercropping suaeda/maize might be caused by interspecific competition to a certain extent, providing an effective means for the improvement of saline-alkali land by phytoremediation.
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Affiliation(s)
- Shoule Wang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
- Shandong Institute of Pomology, Shandong Academy of Agricultural Sciences, Taian 271000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Shaoqing Ge
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenxuan Mai
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
- Correspondence: (W.M.); (C.T.)
| | - Changyan Tian
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
- Correspondence: (W.M.); (C.T.)
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Saito T, Oishi T, Inoue M, Iida S, Mihota N, Yamada A, Shimizu K, Inumochi S, Inosako K. Low-Error Soil Moisture Sensor Employing Spatial Frequency Domain Transmissometry. Sensors (Basel) 2022; 22:8658. [PMID: 36433254 PMCID: PMC9696516 DOI: 10.3390/s22228658] [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] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/30/2022] [Accepted: 11/07/2022] [Indexed: 06/16/2023]
Abstract
A new type of soil moisture sensor using spatial frequency domain transmissometry (SFDT) was evaluated. This sensor transmits and receives ultrawideband (1 to 6 GHz) radio waves between two separated antennas and measures the propagation delay time in the soil related to the dielectric constant. This method is expected to be less affected by air gaps between the probes and the soil, as well as being less affected by soil electrical conductivity (EC), than typical commercial sensors. The relationship between output and volumetric water content (θ), and the effects of air gaps and EC were evaluated through experiments using sand samples and the prototype SFDT sensor. The output of the SFDT sensor increased linearly with θ and was not affected by even a high salt concentration for irrigation water, such that the EC of the pore water was 9.2 dS·m-1. The SFDT sensor was almost unaffected by polyethylene tapes wrapped around the sensor to simulate air gaps, whereas a commercially available capacitance sensor significantly underestimated θ. Theoretical models of the SFDT sensor were also developed for the calibration equation and the air gaps. The calculation results agreed well with the experimental results, indicating that analytical approaches are possible for the evaluation of the SFDT sensor.
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Affiliation(s)
- Tadaomi Saito
- Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Takahiro Oishi
- Sony Group Corporation, 1-7-1 Konan Minato-ku, Tokyo 108-0075, Japan
| | - Mitsuhiro Inoue
- Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Sachio Iida
- Sony Group Corporation, 1-7-1 Konan Minato-ku, Tokyo 108-0075, Japan
| | - Norihito Mihota
- Sony Group Corporation, 1-7-1 Konan Minato-ku, Tokyo 108-0075, Japan
| | - Atsushi Yamada
- Sony Group Corporation, 1-7-1 Konan Minato-ku, Tokyo 108-0075, Japan
| | - Kohei Shimizu
- Department of Dryland Science, Graduate School of Sustainability Science, Tottori University, 4-101 Koyama-Minami, Tottori 680-8550, Japan
| | - Satoru Inumochi
- United Graduate School of Agricultural Sciences, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
| | - Koji Inosako
- Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8553, Japan
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Kapadia C, Patel N, Rana A, Vaidya H, Alfarraj S, Ansari MJ, Gafur A, Poczai P, Sayyed RZ. Evaluation of Plant Growth-Promoting and Salinity Ameliorating Potential of Halophilic Bacteria Isolated From Saline Soil. Front Plant Sci 2022; 13:946217. [PMID: 35909789 PMCID: PMC9335293 DOI: 10.3389/fpls.2022.946217] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 06/17/2022] [Indexed: 05/09/2023]
Abstract
Among the biotic and abiotic stress affecting the physical, chemical, and biological properties of soil, salinity is a major threat that leads to the desertification of cultivable land throughout the world. The existence of diverse and versatile microbial populations inhabiting the nutrient-rich soil and varied soil conditions affects the soil dynamism. A normal soil constitutes 600 million bacteria belonging to about 20,000 species, which is reduced to 1 million with 5,000-8,000 species in stress conditions. Plant growth-promoting rhizobacteria (PGPR) are in symbiotic association with the plant system, which helps in combating the abiotic stress and increases the overall productivity and yield. These microorganisms are actively associated with varied cellular communication processes through quorum sensing and secondary metabolites such as the production of Indole-3-acetic acid (IAA), exopolysaccharide (EPS) siderophore, ammonia, ACC deaminase, and solubilization of phosphate. The present study focused on the isolation, identification, and characterization of the microorganisms isolated from the seacoast of Dandi, Navsari. Twelve isolates exhibited PGP traits at a high salt concentration of 15-20%. AD9 isolate identified as Bacillus halotolerans showed a higher ammonia production (88 ± 1.73 μg/mL) and phosphate solubilization (86 ± 3.06 μg/mL) at 15% salt concentration, while AD32* (Bacillus sp. clone ADCNO) gave 42.67 ±1.20 μg/mL IAA production at 20% salt concentration. AD2 (Streptomyces sp. clone ADCNB) and AD26 (Achromobacter sp. clone ADCNI) showed ACC deaminase activity of 0.61 ± 0.12 and 0.60 ± 0.04 nM α-ketobutyrate/mg protein/h, respectively. AD32 (Bacillus sp. clone ADCNL) gave a high siderophore activity of 65.40 ± 1.65%. These isolates produced salinity ameliorating traits, total antioxidant activities, and antioxidant enzymes viz. superoxide dismutase (SOD), Glutathione oxidase (GSH), and catalase (CAT). Inoculation of the multipotent isolate that produced PGP traits and salinity ameliorating metabolites promoted the plant growth and development in rice under salinity stress conditions. These results in 50% more root length, 25.00% more plant dry weight, and 41% more tillers compared to its control.
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Affiliation(s)
- Chintan Kapadia
- Department of Plant Molecular Biology and Biotechnology, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari, India
| | - Nafisa Patel
- Naran Lala College of Professional and Applied Sciences, Navsari, India
- *Correspondence: Nafisa Patel
| | - Ankita Rana
- Naran Lala College of Professional and Applied Sciences, Navsari, India
| | - Harihar Vaidya
- Department of Plant Molecular Biology and Biotechnology, ASPEE College of Horticulture and Forestry, Navsari Agricultural University, Navsari, India
| | - Saleh Alfarraj
- Zoology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad Javed Ansari
- Department of Botany, Hindu College (Mahatma Jyotiba Phule Rohilkhand University Bareilly), Moradabad, India
| | - Abdul Gafur
- Sinarmas Forestry Corporate Research and Development, Perawang, Indonesia
| | - Peter Poczai
- Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
- Peter Poczai
| | - R. Z. Sayyed
- Department of Entomology, Asian PGPR Society for Sustainable Agriculture, Auburn University, Auburn, AL, United States
- Department of Microbiology, PSGVP Mandal's‘S I Patil Arts, G B Patel Science, and STKV Sangh Commerce College, Shahada, India
- R. Z. Sayyed
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9
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Jiang H, Li S, Wang T, Chi X, Qi P, Chen G. Interaction Between Halotolerant Phosphate-Solubilizing Bacteria ( Providencia rettgeri Strain TPM23) and Rock Phosphate Improves Soil Biochemical Properties and Peanut Growth in Saline Soil. Front Microbiol 2021; 12:777351. [PMID: 35027913 PMCID: PMC8751486 DOI: 10.3389/fmicb.2021.777351] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/17/2021] [Indexed: 11/21/2022] Open
Abstract
Soil salinity has adverse effects on soil microbial activity and nutrient cycles and therefore limits crop growth and yield. Amendments with halotolerant phosphate-solubilizing bacteria (PSB) and rock phosphate (RP) may improve properties of saline soil. In this study, we investigated the effects of RP either alone or in combination with PSB (Providencia rettgeri strain TPM23) on peanut growth and soil quality in a saline soil. With the combined application of RP and PSB, plant length and biomass (roots and shoots) and uptake of phosphorus (P), nitrogen (N), and potassium (K) increased significantly. Soil Na+ and Cl- contents decreased in the PR alone or PR combined with PSB treatment groups. There were strongly synergistic effects of RP and PSB on soil quality, including a decrease in pH. The soil available N, P, and K contents were significantly affected by the PSB treatments. In addition, the alkaline phosphomonoesterases, urease, and dehydrogenase activities increased significantly compared with the untreated group; highest alkaline phosphomonoesterases activity was observed in the RP and PSB treatment groups. The composition of rhizosphere soil bacterial communities was determined using 454-pyrosequencing of the 16S rRNA gene. In the PR alone or PR combined with PSB treatment groups, the structure of the soil bacterial community improved with increasing richness and diversity. With PSB inoculation, the relative abundance of Acidobacteria, Chloroflexi, and Planctomycetes increased. The three phyla were also positively correlated with soil available N and root dry weight. These results suggested microbiological mechanisms by which the combined use of RP and PSB improved saline soil and promoted plant growth. Overall, the study indicates the combined use of RP and PSB can be an economical and sustainable strategy to increase plant growth in P-deficient and salt-affected soils.
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Affiliation(s)
- Huanhuan Jiang
- College of Life Sciences, Zhaoqing University, Zhaoqing, China
- Shandong Peanut Research Institute, Qingdao, China
| | - Sainan Li
- College of Life Sciences, Zhaoqing University, Zhaoqing, China
| | - Tong Wang
- Shandong Peanut Research Institute, Qingdao, China
| | - Xiaoyuan Chi
- Shandong Peanut Research Institute, Qingdao, China
| | - Peishi Qi
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, China
| | - Gang Chen
- College of Life Sciences, Zhaoqing University, Zhaoqing, China
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10
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Palchetti MV, Cantero JJ, Morales-Fierro V, Barboza GE, Moreira-Muñoz A. Living in extreme environments: distribution of Lyciumhumile (Solanaceae), an endemic halophyte from the Altiplano-Puna region, South America. PhytoKeys 2021; 185:1-15. [PMID: 34819777 PMCID: PMC8596562 DOI: 10.3897/phytokeys.185.71377] [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] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Accepted: 10/13/2021] [Indexed: 06/13/2023]
Abstract
Very few Solanaceae species are able to grow in saline soils; one of them is Lyciumhumile. This species is endemic to the Altiplano-Puna region (Central Andes, South America) where there are multiple extreme environmental conditions such as hypersaline soils. Here we present an updated description and distribution of L.humile including its new record for Bolivia at the edges of "Salar de Uyuni", the largest salt flat in the world; we discuss its ecological role in saline environments by analyzing soil salinity and cover-abundance values of the studied sites. According to IUCN criteria, we recommend a category of Least Concern for L.humile, but the growing development of lithium mining in saline environments of the Altiplano-Puna region may potentially threaten exclusive communities.
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Affiliation(s)
- María Virginia Palchetti
- Instituto Multidisciplinario de Biología Vegetal, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Juan José Cantero
- Instituto Multidisciplinario de Biología Vegetal, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Departamento de Biología Agrícola, Facultad de Agronomía y Veterinaria, Universidad Nacional de Río Cuarto, Río Cuarto, Argentina
| | | | - Gloria E. Barboza
- Instituto Multidisciplinario de Biología Vegetal, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Departamento de Ciencias Farmacéuticas, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Andrés Moreira-Muñoz
- Instituto de Geografía, Facultad de Ciencias del Mar y Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
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11
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Zheng Y, Xu Z, Liu H, Liu Y, Zhou Y, Meng C, Ma S, Xie Z, Li Y, Zhang CS. Patterns in the Microbial Community of Salt-Tolerant Plants and the Functional Genes Associated with Salt Stress Alleviation. Microbiol Spectr 2021; 9:e0076721. [PMID: 34704793 DOI: 10.1128/Spectrum.00767-21] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Salinity is an important abiotic stress affecting plant growth. We have known that plants can recruit beneficial microbes from the surrounding soil. However, the ecological functions of the core microbiome in salt-tolerant plants, together with their driving factors, remain largely unexplored. Here, we employed both amplicon and shotgun metagenomic sequencing to investigate the microbiome and function signatures of bulk soil and rhizocompartment samples from three salt-tolerant plants (legumes Glycine soja and Sesbania cannabina and nonlegume Sorghum bicolor). Strong filtration effects for microbes and functional genes were found in the rhizocompartments following a spatial gradient. The dominant bacteria belonged to Ensifer for legumes and Bacillus for S. bicolor. Although different salt-tolerant plants harbored distinct bacterial communities, they all enriched genes involved in cell motility, Na+ transport, and plant growth-promoting function (e.g., nitrogen fixation and phosphate solubilization) in rhizoplane soils, implying that the microbiome assembly of salt-tolerant plants might depend on the ecological functions of microbes rather than microbial taxa. Moreover, three metagenome-assembled genomes affiliated to Ensifer were obtained, and their genetic basis for salt stress alleviation were predicted. Soil pH, electrical conductivity, and total nitrogen were the most important driving factors for explaining the above microbial and functional gene selection. Correspondingly, the growth of an endophyte, Ensifer meliloti CL09, was enhanced by providing root exudates, suggesting that root exudates might be one of factors in the selection of rhizosphere and endosphere microbiota. Overall, this study reveals the ecological functions of the populations inhabiting the root of salt-tolerant plants. IMPORTANCE Salinity is an important but little-studied abiotic stressor affecting plant growth. Although several previous reports have examined salt-tolerant plant microbial communities, we still lack a comprehensive understanding about the functional characteristics and genomic information of this population. The results of this study revealed the root-enriched and -depleted bacterial groups, and found three salt-tolerant plants harbored different bacterial populations. The prediction of three metagenome-assembled genomes confirmed the critical role of root dominant species in helping plants tolerate salt stress. Further analysis indicated that plants enriched microbiome from soil according to their ecological functions but not microbial taxa. This highlights the importance of microbial function in enhancing plant adaptability to saline soil and implies that we should pay more attention to microbial function and not only to taxonomic information. Ultimately, these results provide insight for future agriculture using the various functions of microorganisms on the saline soil.
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Cui HL, Shi XW, Yin XM, Yang XY, Hou J, Zhu L. Halobaculum halophilum sp. nov. and Halobaculum salinum sp. nov., isolated from salt lake and saline soil. Int J Syst Evol Microbiol 2021; 71. [PMID: 34283016 DOI: 10.1099/ijsem.0.004900] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two halophilic archaeal strains, Gai3-2T and NJ-3-1T, were isolated from salt lake and saline soil samples, respectively, collected in PR China. The 16S rRNA gene sequences of the two strains were 97.5% similar to each other. Strains Gai3-2T and NJ-3-1T had the highest sequence similarities to 'Halobonum tyrrellense' G22 (96.7 and 97.8%, respectively), and displayed similarities of 91.5-93.5% and 92.3-94.7%, respectively, to Halobaculum members. Phylogenetic analysis revealed that the two strains formed different branches and clustered tightly with 'H. tyrrellense' G22 and Halobaculum members. The average nucleotide identity (ANI), in silico DNA-DNA hybridization (isDDH) and amino acid identity (AAI) values between the two strains were 83.1, 26.9 and 77.9%, respectively, much lower than the threshold values proposed as a species boundary. These values between the two strains and 'H. tyrrellense' G22 (ANI 77.9-78.2%, isDDH 22.5-22.6% and AAI 68.8-69.3%) and Halobaculum members (ANI 77.53-77.63%, isDDH 21.8-22.3% and AAI 68.4-69.4%) were almost identical, and much lower than the recommended threshold values for species delimitation. These results suggested that strains Gai3-2T and NJ-3-1T represent two novel species of Halobaculum. Based on phenotypic, chemotaxonomic and phylogenetic properties, strains Gai3-2T (=CGMCC 1.16080T=JCM 33550T) and NJ-3-1T (=CGMCC 1.16040T=JCM 33552T) represent two novel species of the genus Halobaculum, for which the name Halobaculum halophilum sp. nov. and Halobaculum salinum sp. nov. are proposed.
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Affiliation(s)
- Heng-Lin Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xiao-Wei Shi
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xue-Meng Yin
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xiao-Yan Yang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Jing Hou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Lin Zhu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
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13
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Wang BL, Wang C, Liu ML. [Ecological remediation of earthworms on soil-plant system: A review]. Ying Yong Sheng Tai Xue Bao 2021; 32:2259-2266. [PMID: 34212632 DOI: 10.13287/j.1001-9332.202106.034] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Soil-plant system is the basic structural unit of the biosphere, with close mutual feedback between soil and plants. The degradation of soil exerts various abiotic stresses to plants, disturbs the physiological metabolism of plants, and inhibits nutrient acquisition. Earthworms are known as "ecosystem engineers", which can regulate soil physical-chemical-biological characteristics, improve the quality of the degraded soil (saline soil, heavy metals and organic pollutants contaminated soil), alleviate plants under stress, increase soil nutrient availability, promote plant growth. Furthermore, through the secretion of signal substances, earthworms could improve the resistance of plants. The ecological remediation effects of earthworms on soil-plant system are of great significance for improving environment of plant growth and maintaining the health and stability of soil.
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Affiliation(s)
- Bing-Lei Wang
- Beijing Key Laboratory of Biodiversity and Organic Agriculture/College of Resources and Environment, China Agricultural University, Beijing 100193, China
| | - Chong Wang
- Beijing Key Laboratory of Biodiversity and Organic Agriculture/College of Resources and Environment, China Agricultural University, Beijing 100193, China
| | - Meng-Li Liu
- Beijing Key Laboratory of Biodiversity and Organic Agriculture/College of Resources and Environment, China Agricultural University, Beijing 100193, China
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14
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Yang XY, Yin XM, Hou J, Zhu L, Cui HL. Halosimplex halophilum sp. nov. and Halosimplex salinum sp. nov., isolated from saline soil and a salt mine. Int J Syst Evol Microbiol 2021; 71. [PMID: 33881980 DOI: 10.1099/ijsem.0.004775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A polyphasic study was undertaken to determine the taxonomic position of two halophilic archaeal strains, TH32T and YPL4T, isolated from saline soil and a salt mine in PR China, respectively. Strains TH32T and YPL4T both have two dissimilar 16S rRNA genes. The two strains exhibited sequence similarities of 91.5-95.5 % for 16S rRNA genes and 90.9 % for the rpoB' gene. Sequence similarities of 16S rRNA genes and the rpoB' gene between the two strains and the current four members of Halosimplex were 90.6-97.4 % and 91.4-93.5 %, respectively. Phylogenetic analysis revealed that the two strains formed different branches separating them from the current Halosimplex members. Several phenotypic characteristics differentiate strains TH32T and YPL4T from current Halosimplex members. The polar lipids of the two strains are phosphatidic acid, phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester and four glycolipids. Two of the glycolipids are chromatographically identical to disulfated mannosyl glucosyl diether and sulfated mannosyl glucosyl diether, respectively, and the remaining two glycolipids are unidentified. The average nucleotide identity (ANI) and in silico DNA-DNA hybridization (DDH) values between the two strains and the current members of Halosimplex (ANI 80.4-89.2 % and in silico DDH 24.0-41.8 %) were much lower than the threshold values proposed as a species boundary, suggesting that the two strains represent novel species of Halosimplex. The values between the two strains (ANI 81.3 % and in silico DDH 24.9 %) were also much lower than the recommended threshold values, which revealed that the two strains represent two genomically different species of Halosimplex. These results showed that strains TH32T (=CGMCC 1.15190T=JCM 30840T) and YPL4T (=CGMCC 1.15329T=JCM 31108T) represent two novel species of Halosimplex, for which the names Halosimplex halophilum sp. nov. and Halosimplex salinum sp. nov. are proposed.
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Affiliation(s)
- Xiao-Yan Yang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xue-Meng Yin
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Jing Hou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Lin Zhu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Heng-Lin Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, PR China
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15
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Wang X, Li YH, Wang RY, Shi FZ, Xu ST. [Remote sensing inversion of surface soil organic matter at jointing stage of winter wheat based on unmanned aerial vehicle multispectral]. Ying Yong Sheng Tai Xue Bao 2020; 31:2399-2406. [PMID: 32715706 DOI: 10.13287/j.1001-9332.202007.023] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The rapid monitoring of soil organic matter (SOM) content in large-scale salinized wheat fields can provide data for promoting research in saline soils and carbon cycle. Based on field sampling and remote sensing images of unmanned aerial vehicle, we established remote sensing prediction models of regional SOM using three methods, i.e., multiple linear regression (MLR), partial least squares (PLSR), and support vector machine regression (SVR) for bare land and wheat field, respectively. The models were validated and compared to identify the optimal inversion model of SOM. Moreover, the SOM in the area was inverted using the optimal model, with the inversion results being compared with the data by interpolation. The results showed that the spectrum after the filtering of 5×5 median was best related to surface SOM. Among the three models, the SVR model had the highest prediction accuracy, followed by the PLSR, while the MLR lowest. The SVR model was the best one for estimating wheat field, with coefficient of determination (R2) and root mean square error (RMSE) of 0.89 and 0.20, respectively, and the validated R2 and RMSE were 0.82 and 0.24, respectively. The bare land SOM was also best fitted by the SVR model, with R2 and RMSE were 0.63, 0.26, respectively, and the verified R2 and RMSE were 0.61, 0.25, respectively, but without statistical significance. The inversion of the optimal model revealed that SOM content in this region ranged from 17.51 to 22.53 g·kg-1, with an average of 19.51 g·kg-1, which was generally consistent with the field measurement. Compared with the inversion results, the interpolation data were limited in accuracy. Overall, our study suggested that the unmanned aerial vehicle-based multi-spectral analysis could be applied to quick and accurate estimation of SOM content in saline soil at the jointing stage of winter wheat.
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Affiliation(s)
- Xi Wang
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, Shandong, China
| | - Yu-Huan Li
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, Shandong, China
| | - Rui-Yan Wang
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, Shandong, China
| | - Feng-Zhi Shi
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, Shandong, China
| | - Shao-Tang Xu
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Tai'an 271018, Shandong, China
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16
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El-Bassiouny HMS, Abdallah MMS, El-Enany MAM, Sadak MS. Nano-Zinc Oxide and <i>Arbuscular mycorrhiza</i> Effects on Physiological and Biochemical Aspects of Wheat Cultivars under Saline Conditions. Pak J Biol Sci 2020; 23:478-490. [PMID: 32363833 DOI: 10.3923/pjbs.2020.478.490] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND OBJECTIVE Saline soils are restrictive factors to agriculture in arid and semi-arid regions, plant growth and productivity. Thus, it was important to consider how, nano-zinc oxide or bulk zinc oxide alleviates the oxidative salt stress in the presence of Arbuscular mycorrhiza (AM) fungi by two wheat cultivars (Sids 13 and Sakha 94). MATERIALS AND METHODS A field experiment was carried out during two winter successive seasons to study the beneficial role of nano-zinc oxide or bulk zinc oxide with different concentrations (5 and 10 mg L-1) in enhancing growth, some biochemical and physiological of two wheat cultivars under saline soil. RESULTS Soaking both wheat cultivars with nano-zinc oxide or bulk zinc oxide in the presence of AM improved growth parameters. All treatments increased significantly photosynthetic pigments, IAA, phenols contents, organic antioxidant enzyme activities and significant decrease in lipid peroxidation. some changes are observed in protein patterns, so several proteins were disappear, but others were selectively improved and synthesis of the new groups of protein was formed, some of these responses were observed through the effect of nano-zinc oxide or bulk zinc oxide and AM. CONCLUSION Nano-ZnO (10 mg L-1) in the presence of AM was the most effective treatments on both cultivars. Results showed superiority of Sakha 94 cultivar in most growth parameters and biochemical aspects than Sids 13 cultivar.
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17
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Xu L, Huang XX, Fan DL, Sun JQ. Lysobacter alkalisoli sp. nov., a chitin-degrading strain isolated from saline-alkaline soil. Int J Syst Evol Microbiol 2020; 70:1273-1281. [PMID: 31851606 DOI: 10.1099/ijsem.0.003911] [Citation(s) in RCA: 19] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Strains of Lysobacter, thought to play vital roles in the environment for their high enzyme production capacity, are ubiquitous in various ecosystems. During an analysis of bacterial diversity in saline soil, a Gram-stain-negative, aerobic, chitin-degrading bacterial strain, designated SJ-36T, was isolated from saline-alkaline soil sampled at Tumd Right Banner, Inner Mongolia, PR China. Strain SJ-36T grew at 4-40 °C (optimum, 30 °C), pH 5.0-10.0 (optimum, pH 7.0-8.0) and 0-6 % NaCl (optimum, 1.0 %). Oxidase and catalase activities were positive. A phylogenetic tree based on 16S rRNA gene sequences and the phylogenomic tree both showed that strain SJ-36T formed a tight clade with Lysobacter maris KMU-14T (sharing 97.6 % 16S rRNA gene similarity) and Lysobacter aestuarii S2-CT (97.8 %). The major polar lipids of strain SJ-36T were phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, two unidentified lipids and one unidentified phospholipid. The major fatty acids were iso-C15 : 0 (37.5 %), summed feature 9 (14.0 %; iso-C17 : 1ω9c and/or C16 : 0 10-methyl) and iso-C11 : 0 (10.6 %). Q-8 was the predominant ubiquinone. Its genomic DNA G+C content was 66.6 mol%. The average nucleotide identity values of strain SJ-36T to L. maris KMU-14T, L. aestuarii S2-CT and other type strains were 81.5, 79.1 and <79.0 %, respectively. The results of physiological, phenotypic and phylogenetic characterizations allowed the discrimination of strain SJ-36T from its phylogenetic relatives. Lysobacter alkalisoli sp. nov. is therefore proposed with strain SJ-36T (=CGMCC 1.16756T=KCTC 43039T) as the type strain.
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Affiliation(s)
- Lian Xu
- Inner Mongolia Key Laboratory of Environmental Pollution Prevention and Waste Resource Recycle & Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, PR China
| | - Xiao-Xian Huang
- Inner Mongolia Key Laboratory of Environmental Pollution Prevention and Waste Resource Recycle & Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, PR China
| | - De-Liang Fan
- Inner Mongolia Key Laboratory of Environmental Pollution Prevention and Waste Resource Recycle & Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, PR China
| | - Ji-Quan Sun
- Inner Mongolia Key Laboratory of Environmental Pollution Prevention and Waste Resource Recycle & Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, PR China
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18
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Li M, Kong D, Wang Y, Ma Q, Han X, Zhou Y, Jiang X, Zhang Y, Ruan Z, Zhang Q. Photobacterium salinisoli sp. nov., isolated from a sulfonylurea herbicide-degrading consortium enriched with saline soil. Int J Syst Evol Microbiol 2019; 69:3910-3916. [PMID: 31693472 DOI: 10.1099/ijsem.0.003705] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, aerobic, motile, rod-shaped bacterium, designated strain LAM9072T, was isolated from a sample of a sulfonylurea herbicide-degrading consortium enriched with saline soil. The optimal temperature and pH for the growth of strain LAM9072T were 35 °C and 7.0, respectively. Strain LAM9072T could grow in the presence of NaCl up to 9 % (w/v). Comparative analysis of the 16S rRNA gene sequences revealed that strain LAM9072T was closely related to members of the family Vibrionaceae, with the highest similarities to Photobacterium halotolerans MACL01T (97.7 %) and Photobacterium galatheae S2753T (97.7 %). Strain LAM9072T formed a distinct phylogenetic subclade within the genus Photobacterium in the 16S rRNA gene phylogenetic trees. The results of multi-locus sequence analysis revealed a distinct lineage with P. halotolerans MACL01T as its closest relative. The genomic G+C content was 50.2 mol%. The DNA-DNA hybridization values between strain LAM9072T and P. halotolerans LMG 22194T and P. galatheae LMG 28894T were 41.6 and 22.2 %, respectively. The average nucleotide identity values were 90.9 and 78.8 %, respectively, by comparing the draft genome sequences of strain LAM9072T and P. halotolerans LMG 22194T and P. galatheae LMG 28894T. The major fatty acids were summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c), C16 : 0 and summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c). Ubiquinone 8 was detected as the predominant respiratory quinone. The main polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, aminophospholipid and four unidentified lipids. Based on its phenotypic characteristics and the results of genotypic analyses, we propose that strain LAM9072T represents a novel species, for which the name Photobacteriumsalinisoli sp. nov. is proposed. The type strain is LAM9072T (=ACCC 19961T=JCM 30852T).
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Affiliation(s)
- Miaomiao Li
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
- College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Delong Kong
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
| | - Yani Wang
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
| | - Qingyun Ma
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
| | - Xiaoyan Han
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
- College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang 330045, PR China
| | - Yiqing Zhou
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
| | - Xu Jiang
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
| | - Yuqin Zhang
- Chinese Academy of Medical Sciences and Peking Union Medical College, Institute of Medicinal Biotechnology, Beijing 100050, PR China
| | - Zhiyong Ruan
- Key Laboratory of Microbial Resources (Ministry of Agriculture, China), Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, PR China
| | - Qinghua Zhang
- College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang 330045, PR China
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A LBLT, Yao HZ, Song YF, Fei YH, She DL. [Effects of soil structure improvement on chlorophyll fluorescence parameters and yield of rice in a coastal reclamation region]. Ying Yong Sheng Tai Xue Bao 2019; 30:3435-3442. [PMID: 31621230 DOI: 10.13287/j.1001-9332.201910.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
To examine the effects of soil structure improvement due to the amendment of biochar and polyacrylamide (PAM) on the chlorophyll fluorescence characteristics of rice leaves and the yield of rice, a pit cultivation experiment was carried out in a coastal reclamation region. Three levels of biochar (0%, 2% and 5% by the mass of 0-20 cm surface soil and noted as B1, B2 and B3, respectively) and PAM (0‰, 0.4‰ and 1‰ by the mass of 0-20 cm surface soil and noted as P1,P2 and P3, respectively) were applied to the adopted soil, respectively. The results of the three-year experiment showed that an appropriate application quantity of biochar and PAM could improve the fluorescence characteristics of rice leaves. However, high levels of biochar and PAM had no obvious or even a negative effect. Among all the treatments, the B2P2 treatment always had the highest the maximum photochemical efficiency (Fv/Fm), the actual photochemical efficiency of photosystem II (ΦPS2), the photochemical quenching coefficient (qP) and the non-photochemical quenching coefficient (NPQ) values during the whole growth period. The chlorophyll content (SPAD value) of rice leaves showed no significant difference among different biochar application levels. However, it showed significant differences among different PAM application levels, with the highest value under the soil amended with 0.4‰ PAM (the P2 treatment). The application of biochar and PAM had significant impacts on rice yield, with the highest yield, namely 7236 kg·hm-2, presenting under the B2P2 treatment, which was 28.5% higher than that of the control. The improved soil structure of the coastal saline soil due to the amendment of biochar and PAM affects rice yield mainly through its influences on the 1000-grain weight, the spike number per hole, the grain number per spike and the seed setting rate. It is concluded that improving soil structure by applying an appropriate quantity of biochar and PAM is conducive to increase the chlorophyll fluorescence characteristics and the yield of rice in the coastal reclamation region.
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Affiliation(s)
- Limu-Bu-Lai-Ti A
- College of Agricultural Engineering, Hohai University, Nanjing 210098, China
| | - Huai-Zhu Yao
- Development Center for Science and Technology of Rural Water Resources of Jiangsu, Nanjing 210029, China
| | - Yun-Fei Song
- Bureau of Natural Resources of Jintan District, Changzhou 213200, Jiangsu, China
| | - Yuan-Hang Fei
- College of Agricultural Engineering, Hohai University, Nanjing 210098, China
| | - Dong-Li She
- College of Agricultural Engineering, Hohai University, Nanjing 210098, China
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Wang F, Sun Y, Shi Z. Arbuscular Mycorrhiza Enhances Biomass Production and Salt Tolerance of Sweet Sorghum. Microorganisms 2019; 7:microorganisms7090289. [PMID: 31450847 PMCID: PMC6780689 DOI: 10.3390/microorganisms7090289] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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] [Received: 07/13/2019] [Revised: 08/14/2019] [Accepted: 08/21/2019] [Indexed: 01/24/2023] Open
Abstract
Arbuscular mycorrhizal (AM) fungi (AMF) are widely known to form a symbiosis with most higher plants and enhance plant adaptation to a series of environmental stresses. Sweet sorghum (Sorghum bicolor (L.) Moench) is considered a promising alternative feedstock for bioalcohol production because of its sugar-rich stalk and high biomass. However, little is known of AMF benefit for biomass production and salt tolerance of sweet sorghum. Here, we investigated the effects of Acaulospora mellea ZZ on growth and salt tolerance in two sweet sorghum cultivars (Liaotian5 and Yajin2) under different NaCl addition levels (0, 0.5, 1, 2, and 3 g NaCl/kg soil). Results showed AMF colonized the two cultivars well under all NaCl addition levels. NaCl addition increased mycorrhizal colonization rates in Yajin2, but the effects on Liaotian5 ranged from stimulatory at 0.5 and 1 g/kg to insignificant at 2 g/kg, and even inhibitory at 3 g/kg. High NaCl addition levels produced negative effects on both AM and non-AM plants, leading to lower biomass production, poorer mineral nutrition (N, P, K), higher Na+ uptake, and lower soluble sugar content in leaves. Compared with non-AM plants, AM plants of both cultivars had improved plant biomass and mineral uptake, as well as higher K+/Na+ ratio, but only Yajin2 plants had a low shoot/root Na ratio. AM inoculation increased the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), and soluble sugar content in leaves. Overall, both cultivars benefited from mycorrhization, and Yajin2 with less salt tolerance showed higher mycorrhizal response. In conclusion, AMF could help to alleviate the negative effects caused by salinity, and thus showed potential in biomass production of sweet sorghum in saline soil.
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Affiliation(s)
- Fayuan Wang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China.
- Key Laboratory of Soil Resources and Environment in Qianbei of Guizhou Province, Zunyi Normal University, Zunyi 563002, China.
| | - Yuhuan Sun
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Zhaoyong Shi
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China
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21
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Sun RJ, Chen WF, Song XL, Luo YF, Liu LJ. [Distribution characteristics and edge effect of soil water and salt in silvopastoral system of the Yellow River Delta, China]. Ying Yong Sheng Tai Xue Bao 2019; 30:2549-2557. [PMID: 31418177 DOI: 10.13287/j.1001-9332.201908.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
We measured soil water and salt distribution characteristics at 0-40 cm soil depth in a silvopastoral system of Fraxinus chinensis and Robinia pseudoacacia mixed forest × Medicago sativa, which is located in Land Use Scientific Observation Field Base of Ministry of Land and Resource in Wudi, Shandong Province, China. The moving split-window technique was used to analyze the internal-system edge effect. The results showed that both soil water and salt contents in this system heterogeneously distributed in the horizontal direction. The variation of soil water was greater and that of soil salt contents was the smaller when closer to the soil surface. With the mixed forest tree row as the boundary line, the contents of soil water and salt on both sides showed similar change trend. With the decreases of distance to the tree row, soil water content reduced first and then increased but the salt contents had a stable fluctuation at 0-10 cm soil layer. Soil water content showed a trend of decrease-flat-decrease but the salt contents first enhanced and then reduced at 10-20 cm soil layer, respectively. At the deeper soil layer (20-40 cm), the water content fluctuated stably but the salt content continued increasing. Both the contents of soil water and salt in the vertical direction increased significantly with soil depth. Except HCO3- and K+, there was a similar change trend between ions and total salt content in the soil of silvopastoral system, and the correlation between these ions and total salt content was Na+>Cl->SO42->Mg2+>Ca2+. Based on the technique of moving split-window, the edge effect zone of soil water in the silvopastoral system was 2.5 m from the east side of the tree row to 2 m from the west side. Soil salinity in the silvopastoral system was mainly affected by the tree row within the range of 1.0 m, and by both of the tree row and M. sativa within the range of 1.0-3.0 m.
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Affiliation(s)
- Ruo Jun Sun
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,Shandong Engineering & Technology Research Center for Saline-alkali Land Phyto-micro Remediation, Tai'an 271018, Shandong, China
| | - Wei Feng Chen
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,Shandong Engineering & Technology Research Center for Saline-alkali Land Phyto-micro Remediation, Tai'an 271018, Shandong, China
| | - Xi Liang Song
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,Shandong Engineering & Technology Research Center for Saline-alkali Land Phyto-micro Remediation, Tai'an 271018, Shandong, China
| | - Yan Feng Luo
- College of Resources and Environment, Shandong Agricultural University, Tai'an 271018, Shandong, China.,Shandong Engineering & Technology Research Center for Saline-alkali Land Phyto-micro Remediation, Tai'an 271018, Shandong, China
| | - Li Jun Liu
- Shandong Wudi Gold Land Development and Construction Co. Ltd., Binzhou 251900, Shandong, China
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Zhang T, Deng Y, Lan H, Zhang F, Zhang H, Wang C, Tan Y, Yu R. Experimental Investigation of the Compactability and Cracking Behavior of Polyacrylamide-Treated Saline Soil in Gansu Province, China. Polymers (Basel) 2019; 11:polym11010090. [PMID: 30960073 PMCID: PMC6402008 DOI: 10.3390/polym11010090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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] [Received: 11/21/2018] [Revised: 12/24/2018] [Accepted: 12/28/2018] [Indexed: 11/16/2022] Open
Abstract
Polyacrylamide (PAM) is a water-soluble polymer with the ability to enhance a soil's stability. PAM is currently being used to prevent irrigation-induced erosion and enhance the infiltration in farmland soil. To improve the compaction properties of the saline-soil-based filling material that is used in highway subgrade and the cracking resistance capacity of a saline soil's crust, the consistency limits, compactability, microstructure, and cracking morphology of untreated and PAM-treated saline soil were investigated. The saline soils were sampled from the soil crust and a depth of 2.0⁻3.0 m in Gansu Province, China. Two PAM concentrations (0.1% and 0.5% in mass ratio) were selected. The liquid limits and plastic limits of the saline soil samples from the surface (0⁻0.05 m) and a depth of 2.0⁻3.0 m noticeably increased as PAM concentration increased. The maximum dry densities decreased as PAM concentration and plasticity increased, and the optimum water contents of the two saline soil types did not significantly change. These results suggest that a higher shearing resistance between particles partially prevented compression from occurring during compaction. Mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) test results showed that the PAM agent dispersed the bulky pellets, and the soil's structure was formed by flaky and acicular platelets that filled the micropores. A quantitative analysis of crack patterns showed that the cross-points of the crack network and the crack length decreased as the PAM concentration increased. These results indicate that an increase in PAM reduces the shrinkage strain and the flaws or pores within saline soils. Therefore, PAM's stabilizing effect on saline soil under a wetting⁻drying cycle was proven.
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Affiliation(s)
- Tongwei Zhang
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Department of Geological Engineering, College of Civil Engineering and Mechanics, Lanzhou University, Tianshui Road 222, Lanzhou 730000, China.
| | - Yongfeng Deng
- Institute of Geotechnical Engineering, School of Transportation, Southeast University, SiPailou 2, Nanjing 210096, China.
| | - Hengxing Lan
- State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
- School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710064, China.
| | - Fanyu Zhang
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Department of Geological Engineering, College of Civil Engineering and Mechanics, Lanzhou University, Tianshui Road 222, Lanzhou 730000, China.
| | - Huyuan Zhang
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Department of Geological Engineering, College of Civil Engineering and Mechanics, Lanzhou University, Tianshui Road 222, Lanzhou 730000, China.
| | - Chong Wang
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Department of Geological Engineering, College of Civil Engineering and Mechanics, Lanzhou University, Tianshui Road 222, Lanzhou 730000, China.
| | - Yu Tan
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Department of Geological Engineering, College of Civil Engineering and Mechanics, Lanzhou University, Tianshui Road 222, Lanzhou 730000, China.
| | - Rongguang Yu
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Department of Geological Engineering, College of Civil Engineering and Mechanics, Lanzhou University, Tianshui Road 222, Lanzhou 730000, China.
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Al-Maliki S, Al-Masoudi M. Interactions between Mycorrhizal Fungi, Tea Wastes, and Algal Biomass Affecting the Microbial Community, Soil Structure, and Alleviating of Salinity Stress in Corn Yield ( Zeamays L.). Plants (Basel) 2018; 7:plants7030063. [PMID: 30096837 PMCID: PMC6161139 DOI: 10.3390/plants7030063] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/27/2018] [Accepted: 08/02/2018] [Indexed: 06/08/2023]
Abstract
Soil salinity has an adverse impact on soil biological properties and growth of corn plant, majorly in arid and semi-arid lands. A mesocosm experiment was conducted to investigate the effect of mycorrhizal fungi (M) (Glomus mosseae), tea wastes (T), algal dried biomass (A), and their combinations on soil respiration, total bacteria, total fungi, soil mean weight diameter (MWD), and corn yield (Zeamays L.). under saline and non-saline soils. Results showed that M, T, and A treatments increased significantly CO₂ release compared to the control. Whereas, M significantly decreased CO₂ release compared to T and A treatments. In non-saline soil, M increased greatly MWD, bacterial and fungal counts, and infection rate. Whereas, the opposite was true in the saline soil; neither M nor T improved bacterial communities and MWD. However, in the saline soil, M + T was highly efficient in improving MWD, SOC, bacterial and fungal counts, infection rate, and corn grain yield. It can be suggested that the inoculation of mycorrhizal fungi with tea wastes in saline soils considered an important strategy that increases the toleration of the corn plant to salinity by improving soil microbial activity, MWD, SOC, infection rate, and total grain yield.
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Affiliation(s)
- Salwan Al-Maliki
- Soil and Water Science Department, College of Agriculture, Al-Qasim Green University, Al Qasim 13239, Iraq.
| | - Mugtaba Al-Masoudi
- Soil and Water Science Department, College of Agriculture, Al-Qasim Green University, Al Qasim 13239, Iraq.
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de Melo HF, de Souza ER, de Almeida BG, Mulas M. Water potential in soil and Atriplex nummularia (phytoremediator halophyte) under drought and salt stresses. Int J Phytoremediation 2018; 20:249-255. [PMID: 29053341 DOI: 10.1080/15226514.2017.1374334] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Atriplex nummularia is a halophyte widely employed to recover saline soils and was used as a model to evaluate the water potentials in the soil-plant system under drought and salt stresses. Potted plants grown under 70 and 37% of field capacity irrigated with solutions of NaCl and of a mixture of NaCl, KCl, MgCl2 and CaCl2 reproducing six electrical conductivity (EC): 0, 5, 10, 20, 30, and 40 dS m-1. After 100 days, total water (Ψw, plant) and osmotic (Ψo, plant) potentials at predawn and midday and Ψo, soil, matric potential (Ψm, soil) and Ψw, soil were determined. The type of ion in the irrigation water did not influence the soil potential, but was altered by EC. The soil Ψo component was the largest contributor to Ψw, soil. Atriplex is surviving ECs close to 40 dS m-1 due to the decrease in the Ψw. The plants reached a Ψw of approximately -8 MPa. The water potentials determined for different moisture levels, EC levels and salt types showed huge importance for the management of this species in semiarid regions and can be used to recover salt affected soils.
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Affiliation(s)
- Hidelblandi Farias de Melo
- a Federal Rural University of Pernambuco - UFRPE, Department of Agronomy , Rua Dom Manuel de Medeiros , Recife , Pernambuco , Brazil
| | - Edivan Rodrigues de Souza
- a Federal Rural University of Pernambuco - UFRPE, Department of Agronomy , Rua Dom Manuel de Medeiros , Recife , Pernambuco , Brazil
| | - Brivaldo Gomes de Almeida
- a Federal Rural University of Pernambuco - UFRPE, Department of Agronomy , Rua Dom Manuel de Medeiros , Recife , Pernambuco , Brazil
| | - Maurizio Mulas
- b University of Sassari , Department of Sciences of Nature and of Land , Sassari , Italy
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Cao YT, She DL. [Effects of biochar and PAM application on saline soil hydraulic properties of coastal reclamation region]. Ying Yong Sheng Tai Xue Bao 2017; 28:3684-3690. [PMID: 29692112 DOI: 10.13287/j.1001-9332.201711.014] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Disc infiltration tests were carried out to study the soil infiltration characteristics under different rates of soil amendments application, and to investigate the effects of biochar and polyacrylamide (PAM) application on saline soil hydraulic properties, pore characteristics and contribution of each pore to soil water flow in coastal reclamation region. The results showed that soil satura-ted hydraulic conductivity increased by 46.4% when biochar was applied at 2% compared with the control, and decreased with increasing PAM application. The total effective soil porosity and r>100 μm pores were increased by 8.3% and 10.2% (P<0.05) with the application of 2% biochar alone. The total effective soil porosity and different radius pores decreased with the PAM application. Particularly, the total effective soil porosity decreased markedly when PAM was applied at 1‰ and the reduction was up to 88%. With the application of biochar and PAM, the contribution of r<100 μm pores to water flow decreased and the pores with r>500 μm played a major role in determining water flows.
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Affiliation(s)
- Yu Tong Cao
- Ministry of Education Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, Nanjing 210098, China
| | - Dong Li She
- 1 Ministry of Education Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China, Hohai University, Nanjing 210098, China.,2 College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
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Djaballah CE, Kitouni M, Raoult D, Khelaifia S. "Streptomyces massilialgeriensis" sp. nov., a new bacterial species isolated from an extremely saline soil collected from the dry lake of Ank el Djamel in Algeria. New Microbes New Infect 2018; 21:18-9. [PMID: 29188064 DOI: 10.1016/j.nmni.2017.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/26/2017] [Accepted: 10/04/2017] [Indexed: 12/22/2022] Open
Abstract
We report here the main characteristics of “Streptomyces massilialgeriensis” strain S35T (CSUR = P3927), a new bacterial species within the Streptomyces genus, isolated from an extremely saline soil sample collected from the site of Garaet Ank Djemel in the Wilaya of Oum El Bouaghi, Algeria.
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Li YL, Qiao JF, Dong TY, Wang HJ. [Hyperspectral inversion of soil water and salt content in soils with different textures]. Ying Yong Sheng Tai Xue Bao 2016; 27:3807-3815. [PMID: 29704337 DOI: 10.13287/j.1001-9332.201612.021] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
In order to monitor soil water and salt content of saline soil conveniently and quickly, this paper took the typical salinization irrigation district of Xinjiang as the research object, obtained the spectral curve of soil water and salt content by using portable spectrometers based on the hyperspectral technology, transformed the original spectra of soil using the first order differential, second order differential and continuum removal methods. The results showed that the transformation of the original spectral data was beneficial to fingerprint band extraction of soil properties, and the method was not same in soils with different textures. In loam soil, continuum removal analysis was the best method for extraction of characteristic bands when the soil water content was 0% and 10%, first order differential equations were the best method when the soil water content was 15%, and second order differential equations were the best method when the soil water content was 19%. In sandy soil, continuum removal analysis was the best method for extraction of characteristic bands when the soil water content was 0%, whereas second order differential equations were the best method when soil water content was 10%, 15% or 19%. The transformed data were screened for inversion models of soil water and salt content by using the partial least squares regression method. When thesalinity was < 6.38 mS·cm-1 in loam soil and < 5.94 mS·cm-1 in sandy soil, the decision coefficients (Rcal2), internal cross validation (Rcv2), and external validation (Rval2) were greater than 0.65 (P<0.05). When the soil moisture content was less than 16% in loam soil and 12% in sandy soil, the inversion accuracy of model was higher. The results would provide a reference threshold for si-multaneously monitoring soil water and salt content in salinized areas.
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Affiliation(s)
- Ya Li Li
- Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, Xinjiang, China
| | - Jiang Fei Qiao
- Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, Xinjiang, China
| | - Tian Yu Dong
- Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, Xinjiang, China
| | - Hai Jiang Wang
- Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, Xinjiang, China
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Sun H, Zhang JF, Xu HS, Chen GC, Wang LP. [Variations of soil microbial community composition and enzyme activities with different salinities on Yuyao coast, Zhejiang, China]. Ying Yong Sheng Tai Xue Bao 2016; 27:3361-3370. [PMID: 29726164 DOI: 10.13287/j.1001-9332.201610.034] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
In October 2015, soil samples with different salinity were collected in a coast area in Yuyao, Zhejiang, and soil microbial community composition, soil catalase, urease activities, as well as soil physical and chemical properties were studied. The results showed that Nitrospira took absolute advantage in the bacterial community, and showed good correlations to total potassium. Cladosporium and Fusarium were predominant in the fungal community. Meanwhile, Cladosporium was related to soil urease and total nitrogen, and same correlation was found between Fusarium and soil urease. Catalase activity ranged from 3.52 to 4.56 mL·g-1, 3.08 to 4.61 mL·g-1 and 5.81 to 6.91 mL·g-1 for soils with heavy, medium and weak salinity, respectively. Catalase activity increased with the soil layer deepening, which was directly related to soil total potassium, and indirectly related to pH, organic matter, total nitrogen and total phosphorus through total potassium. Soil urease activity ranged among 0.04 to 0.52 mg·g-1, 0.08 to 1.07 mg·g-1 and 0.27 to 8.21 mg·g-1 for each saline soil, respectively. Urease activity decreased with soil layer deepening which was directly related to soil total nitrogen, and was indirectly related to pH, organic matter and total potassium through total nitrogen. The total phosphorus was the largest effect factor on the bacterial community CCA ordination, and the urease was on fungal community.
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Affiliation(s)
- Hui Sun
- Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
| | - Jian Feng Zhang
- Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
| | - Hua Sen Xu
- Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
| | - Guang Cai Chen
- Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
| | - Li Ping Wang
- Yuyao Forestry Technological Extension Station, Yuyao 315400, Zhejiang, China
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Lashari MS, Ye Y, Ji H, Li L, Kibue GW, Lu H, Zheng J, Pan G. Biochar-manure compost in conjunction with pyroligneous solution alleviated salt stress and improved leaf bioactivity of maize in a saline soil from central China: a 2-year field experiment. J Sci Food Agric 2015; 95:1321-1327. [PMID: 25042565 DOI: 10.1002/jsfa.6825] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [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: 03/17/2014] [Revised: 07/06/2014] [Accepted: 07/10/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND Salinity is a major stress threatening crop production in dry lands. A 2-year field experiment was conducted to assess the potential of a biochar product to alleviate salt-stress to a maize crop in a saline soil. The soil was amended with a compost at 12 t ha(-1) of wheat straw biochar and poultry manure compost (BPC), and a diluted pyroligneous solution (PS) at 0.15 t ha(-1) (BPC-PS). Changes in soil salinity and plant performance, leaf bioactivity were examined in the first (BPC-PS1) and second (BPC-PS2) year following a single amendment. RESULTS While soil salinity significantly decreased, there were large increases in leaf area index, plant performance, and maize grain yield, with a considerable decrease in leaf electrolyte leakage when grown in amendments. Maize leaf sap nitrogen, phosphorus and potassium increased while sodium and chloride decreased, leaf bioactivity related to osmotic stress was significantly improved following the treatments. These effects were generally greater in the second than in the first year. CONCLUSION A combined amendment of crop straw biochar with manure compost plus pyroligneous solution could help combat salinity stress to maize and improve productivity in saline croplands in arid/semi-arid regions threatened increasingly by global climate change.
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Affiliation(s)
- Muhammad Siddique Lashari
- Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, China; Faculty of Crop Production, Department of Soil Science, Sindh Agriculture University, Tandojam, 70060, Pakistan
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Flowers TJ, Munns R, Colmer TD. Sodium chloride toxicity and the cellular basis of salt tolerance in halophytes. Ann Bot 2015; 115:419-31. [PMID: 25466549 PMCID: PMC4332607 DOI: 10.1093/aob/mcu217] [Citation(s) in RCA: 268] [Impact Index Per Article: 29.8] [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: 06/19/2014] [Revised: 08/01/2014] [Accepted: 09/19/2014] [Indexed: 05/18/2023]
Abstract
BACKGROUND Halophytes are the flora of saline soils. They adjust osmotically to soil salinity by accumulating ions and sequestering the vast majority of these (generally Na(+) and Cl(-)) in vacuoles, while in the cytoplasm organic solutes are accumulated to prevent adverse effects on metabolism. At high salinities, however, growth is inhibited. Possible causes are: toxicity to metabolism of Na(+) and/or Cl(-) in the cytoplasm; insufficient osmotic adjustment resulting in reduced net photosynthesis because of stomatal closure; reduced turgor for expansion growth; adverse cellular water relations if ions build up in the apoplast (cell walls) of leaves; diversion of energy needed to maintain solute homeostasis; sub-optimal levels of K(+) (or other mineral nutrients) required for maintaining enzyme activities; possible damage from reactive oxygen species; or changes in hormonal concentrations. SCOPE This review discusses the evidence for Na(+) and Cl(-) toxicity and the concept of tissue tolerance in relation to halophytes. CONCLUSIONS The data reviewed here suggest that halophytes tolerate cytoplasmic Na(+) and Cl(-) concentrations of 100-200 mm, but whether these ions ever reach toxic concentrations that inhibit metabolism in the cytoplasm or cause death is unknown. Measurements of ion concentrations in the cytosol of various cell types for contrasting species and growth conditions are needed. Future work should also focus on the properties of the tonoplast that enable ion accumulation and prevent ion leakage, such as the special properties of ion transporters and of the lipids that determine membrane permeability.
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Affiliation(s)
- Timothy J Flowers
- School of Plant Biology and ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia, CSIRO Agriculture, GPO Box 1600, Canberra, ACT, 2601, Australia and School of Life Sciences, University of Sussex, Falmer, Brighton BN7 1BD, UK School of Plant Biology and ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia, CSIRO Agriculture, GPO Box 1600, Canberra, ACT, 2601, Australia and School of Life Sciences, University of Sussex, Falmer, Brighton BN7 1BD, UK
| | - Rana Munns
- School of Plant Biology and ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia, CSIRO Agriculture, GPO Box 1600, Canberra, ACT, 2601, Australia and School of Life Sciences, University of Sussex, Falmer, Brighton BN7 1BD, UK School of Plant Biology and ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia, CSIRO Agriculture, GPO Box 1600, Canberra, ACT, 2601, Australia and School of Life Sciences, University of Sussex, Falmer, Brighton BN7 1BD, UK School of Plant Biology and ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia, CSIRO Agriculture, GPO Box 1600, Canberra, ACT, 2601, Australia and School of Life Sciences, University of Sussex, Falmer, Brighton BN7 1BD, UK
| | - Timothy D Colmer
- School of Plant Biology and ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia, CSIRO Agriculture, GPO Box 1600, Canberra, ACT, 2601, Australia and School of Life Sciences, University of Sussex, Falmer, Brighton BN7 1BD, UK
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Yousuf B, Kumar R, Mishra A, Jha B. Differential distribution and abundance of diazotrophic bacterial communities across different soil niches using a gene-targeted clone library approach. FEMS Microbiol Lett 2014; 360:117-25. [PMID: 25196726 DOI: 10.1111/1574-6968.12593] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 08/27/2014] [Accepted: 08/31/2014] [Indexed: 11/30/2022] Open
Abstract
Diazotrophs are key players of the globally important biogeochemical nitrogen cycle, having a significant role in maintaining ecosystem sustainability. Saline soils are pristine and unexplored habitats representing intriguing ecosystems expected to harbour potential diazotrophs capable of adapting in extreme conditions, and these implicated organisms are largely obscure. Differential occurrence of diazotrophs was studied by the nifH gene-targeted clone library approach. Four nifH gene clone libraries were constructed from different soil niches, that is saline soils (low and high salinity; EC 3.8 and 7.1 ds m(-1) ), and agricultural and rhizosphere soil. Additionally, the abundance of diazotrophic community members was assessed using quantitative PCR. Results showed environment-dependent metabolic versatility and the presence of nitrogen-fixing bacteria affiliated with a range of taxa, encompassing members of the Alphaproteobacteria, Betaproteobacteria, Deltaproteobacteria, Gammaproteobacteria, Cyanobacteria and Firmicutes. The analyses unveiled the dominance of Alphaproteobacteria and Gammaproteobacteria (Pseudomonas, Halorhodospira, Ectothiorhodospira, Bradyrhizobium, Agrobacterium, Amorphomonas) as nitrogen fixers in coastal-saline soil ecosystems, and Alphaproteobacteria and Betaproteobacteria (Bradyrhizobium, Azohydromonas, Azospirillum, Ideonella) in agricultural/rhizosphere ecosystems. The results revealed a repertoire of novel nitrogen-fixing bacterial guilds particularly in saline soil ecosystems.
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Affiliation(s)
- Basit Yousuf
- Discipline of Marine Biotechnology and Ecology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, Gujarat, India; Academy of Scientific and Innovative Research (AcSIR), CSIR, New Delhi, India
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Pfetffer CM, Bloss HE. Growth and nutrition of guayule (Parthenium argentatum) in a saline soil as influenced by vesicular-arbuscular mycorrhiza and phosphorus fertilization. New Phytol 1988; 108:315-321. [PMID: 33873940 DOI: 10.1111/j.1469-8137.1988.tb04168.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Growth of guayule (Parthenium argentatum A. Gray) in a moderate and a highly saline-sodie soil was increased by inoculation with Glomus intraradices Schenck & Smith. The growth of guayule plants was stimulated equally by the addition to the soil of either 100 μg g1 of phosphorus (P) or inoculum of G. intraradices. Mycorrhizal plants had increased concentrations of PO4 and decreased concentrations of Na in shoot tissues compared to non inoculated control plants. Addition of 100/μgg 1 of P to the soil increased the accumulation of PO4 in the shoot tissues and in most instances decrease accumulation of Cu, Zn, Na, K, and SO4 . Concentrations of Na, K, and Cl and frequently Mn in the shoot tissues were increased while the concentrations of PO4 and SO4 in shoot tissues were generally decreased by the addition of NaCl to the soil. Addition of 100μgg 1 of P to the soil did not markedly affect the colonization of guayule roots by G. intraradices. The roots of mycorrhizal guayule grown in soil with NaCl added contained decreased numbers of arbuscules and vesicles. Addition of both P and NaCl to the soil reduced the formation of arbuscules and vesicles and reduced the occurrence of moderate and heavy levels of root colonization.
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Affiliation(s)
- C M Pfetffer
- Department of Plant Pathology, University of Arizona, Tucson, Arizona 85721, U.S.A
| | - H E Bloss
- Department of Plant Pathology, University of Arizona, Tucson, Arizona 85721, U.S.A
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