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Zhao L, Kang C, Zhang S, Cui L, Xu S, Wang Y, Zhang Y, Gu S. Bacillus cereus CGMCC 1.60196: a promising bacterial inoculant isolated from biological soil crusts for maize growth enhancement. Front Microbiol 2024; 15:1461949. [PMID: 39314878 PMCID: PMC11416921 DOI: 10.3389/fmicb.2024.1461949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2024] [Accepted: 08/29/2024] [Indexed: 09/25/2024] Open
Abstract
Soil microbial inoculants are widely recognized as an environmentally friendly strategy for promoting crop growth and increasing productivity. However, research on utilizing the microbial resources from desert biological soil crusts to enhance crop growth remains relatively unexplored. In the present work, a bacterial strain designated AC1-8 with high levels of amylase, protease, and cellulase activity was isolated from cyanobacterial crusts of the Tengger Desert and identified as Bacillus cereus (CGMCC 1.60196). The refinement of the fermentation parameters of B. cereus CGMCC 1.60196 determined that the most effective medium for biomass production was composed of 5 g/L glucose, 22 g/L yeast extract and 15 g/L MgSO4, and the optimal culture conditions were pH 6.0, temperature 37°C, inoculation quantity 3% and agitation speed 240 rpm. Furthermore, the utilization of B. cereus CGMCC 1.60196 has resulted in substantial improvements in various growth parameters of maize seedlings, including shoot length, shoot fresh and dry weights, root fresh and dry weights, and the contents of chlorophyll a, chlorophyll b, and total chlorophyll. The most pronounced growth promotion was observed at an application concentration of 1 × 109 CFU/m2. These results suggest that the novel B. cereus strain, isolated from cyanobacterial crusts, can be regarded as an exemplary biological agent for soil improvement, capable of enhancing soil conditions, promoting crop cultivation and supporting food production.
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Affiliation(s)
- Lina Zhao
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Chenrui Kang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Shipeng Zhang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Linlin Cui
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Shuaihua Xu
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Yudong Wang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Yue Zhang
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Shaobin Gu
- College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
- Henan Engineering Research Center of Food Microbiology, Luoyang, China
- National Demonstration Center for Experimental Food Processing and Safety Education, Luoyang, China
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Wu J, Hou X, Xu L, Zhou Q, Wang Y, Guo Z, Adomako MO, Ma Q. Belowground bud banks and land use change: roles of vegetation and soil properties in mediating the composition of bud banks in different ecosystems. FRONTIERS IN PLANT SCIENCE 2024; 14:1330664. [PMID: 38250452 PMCID: PMC10796614 DOI: 10.3389/fpls.2023.1330664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 12/12/2023] [Indexed: 01/23/2024]
Abstract
Introduction Belowground bud banks play integral roles in vegetation regeneration and ecological succession of plant communities; however, human-caused changes in land use severely threaten their resilience and regrowth. Although vegetation attributes and soil properties mediate such anthropogenic effects, their influence on bud bank size and composition and its regulatory mechanisms under land use change have not been explored. Methods We conducted a field investigation to examine impacts of land use change on bud bank size and composition, vegetation attributes, and soil properties in wetlands (WL), farmlands (FL), and alpine meadow (AM) ecosystems in Zhejiang Province, China. Results Overall, 63 soil samples in close proximity to the vegetation quadrats were excavated using a shovel, and samples of the excavated soil were placed in plastic bags for onward laboratory soil analysis. The total bud density (1514.727 ± 296.666) and tiller bud density (1229.090 ± 279.002) in wetland ecosystems were significantly higher than in farmland and alpine meadow ecosystems [i.e., total (149.333 ± 21.490 and 573.647 ± 91.518) and tiller bud density (24.666 ± 8.504 and 204.235 ± 50.550), respectively]. While vegetation attributes critically affected bud banks in WL ecosystems, soil properties strongly influenced bud banks in farmland and alpine meadow ecosystems. In wetland ecosystems, total and tiller buds were predominantly dependent on soil properties, but vegetation density played a significant role in farmlands and alpine meadow ecosystems. Root sprouting and rhizome buds significantly correlated with total C in the top 0 - 10 cm layer of farmland and alpine meadow ecosystems, respectively, and depended mainly on soil properties. Discussion Our results demonstrate that land use change alters bud bank size and composition; however, such responses differed among bud types in wetland, farmland, and alpine meadow ecosystems.
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Affiliation(s)
- Jing Wu
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China
| | - Xianzhang Hou
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China
| | - Lan Xu
- Department of Natural Resource Management, South Dakota State University, Brookings, SD, United States
| | - Quanlai Zhou
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Yongcui Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
| | - Ziwu Guo
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hanzhou, China
| | - Michael Opoku Adomako
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, School of Life Sciences, Taizhou University, Taizhou, China
- Institute of Wetland Ecology and Clone Ecology, Taizhou University, Taizhou, China
| | - Qun Ma
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
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Liu H, Pausch J, Wu Y, Xu H, Liu G, Ma L, Xue S. Implications of plant N/P stoichiometry influenced by arbuscular mycorrhizal fungi for stability of plant species and community in response to nutrient limitation. OIKOS 2022. [DOI: 10.1111/oik.09649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hongfei Liu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F Univ. Yangling PR China
- Agroecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), Univ. of Bayreuth Bayreuth Germany
- Chinese Academy of Sciences and Ministry Water Resources, Inst. of Soil and Water Conservation Yangling PR China
| | - Johanna Pausch
- Agroecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), Univ. of Bayreuth Bayreuth Germany
| | - Yang Wu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F Univ. Yangling PR China
- Chinese Academy of Sciences and Ministry Water Resources, Inst. of Soil and Water Conservation Yangling PR China
| | - Hongwei Xu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F Univ. Yangling PR China
- Chinese Academy of Sciences and Ministry Water Resources, Inst. of Soil and Water Conservation Yangling PR China
| | - Guobin Liu
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F Univ. Yangling PR China
- Chinese Academy of Sciences and Ministry Water Resources, Inst. of Soil and Water Conservation Yangling PR China
| | - LiHui Ma
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F Univ. Yangling PR China
- Chinese Academy of Sciences and Ministry Water Resources, Inst. of Soil and Water Conservation Yangling PR China
| | - Sha Xue
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F Univ. Yangling PR China
- Chinese Academy of Sciences and Ministry Water Resources, Inst. of Soil and Water Conservation Yangling PR China
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Nitrogen Addition Does Not Change AMF Colonization but Alters AMF Composition in a Chinese Fir (Cunninghamia lanceolata) Plantation. FORESTS 2022. [DOI: 10.3390/f13070979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Aims: Our aim was to investigate how N addition affects arbuscular mycorrhizal fungal (AMF) growth in Chinese fir plantations. Methods: A Chinese fir plantation was treated with four different N addition treatments for one and half years starting in April 2019. AMF colonization, hyphal length density, community composition, and soil properties were under measurement. Results: N addition caused inapparent effects on AMF colonization, hyphal length density, and functional guilds (rhizophilic, edaphophilic, and ancestral). The predominant AMF species in the soil was Septoglomus viscosum. N addition altered AMF community and some rare species (e.g., Entrophospora infrequens) disappeared with N addition. Conclusion: AMF community structure was more sensitive to short-time N deposition than the symbiotic relationship between AMF and host plants.
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Zhou J, Wilson GWT, Cobb AB, Zhang Y, Liu L, Zhang X, Sun F. Mycorrhizal and rhizobial interactions influence model grassland plant community structure and productivity. MYCORRHIZA 2022; 32:15-32. [PMID: 35037106 DOI: 10.1007/s00572-021-01061-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 11/24/2021] [Indexed: 05/20/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi and rhizobium are likely important drivers of plant coexistence and grassland productivity due to complementary roles in supplying limiting nutrients. However, the interactive effects of mycorrhizal and rhizobial associations on plant community productivity and competitive dynamics remain unclear. To address this, we conducted a greenhouse experiment to determine the influences of these key microbial functional groups on communities comprising three plant species by comparing plant communities grown with or without each symbiont. We also utilized N-fertilization and clipping treatments to explore potential shifts in mycorrhizal and rhizobial benefits across abiotic and biotic conditions. Our research suggests AM fungi and rhizobium co-inoculation was strongly facilitative for plant community productivity and legume (Medicago sativa) growth and nodulation. Plant competitiveness shifted in the presence of AM fungi and rhizobium, favoring M. sativa over a neighboring C4 grass (Andropogon gerardii) and C3 forb (Ratibida pinnata). This may be due to rhizobial symbiosis as well as the relatively greater mycorrhizal growth response of M. sativa, compared to the other model plants. Clipping and N-fertilization altered relative costs and benefits of both symbioses, presumably by altering host-plant nitrogen and carbon dynamics, leading to a relative decrease in mycorrhizal responsiveness and proportional biomass of M. sativa relative to the total biomass of the entire plant community, with a concomitant relative increase in A. gerardii and R. pinnata proportional biomass. Our results demonstrate a strong influence of both microbial symbioses on host-plant competitiveness and community dynamics across clipping and N-fertilization treatments, suggesting the symbiotic rhizosphere community is critical for legume establishment in grasslands.
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Affiliation(s)
- Jiqiong Zhou
- Department of Grassland Science, College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, Sichuan, China.
- Department of Grassland Science, College of Grassland Science & Technology, China Agricultural University, Beijing, China.
| | - Gail W T Wilson
- Department of Natural Resource Ecology and Management, Oklahoma State University, Stillwater, OK, 008C AGH74078, USA
| | - Adam B Cobb
- Department of Natural Resource Ecology and Management, Oklahoma State University, Stillwater, OK, 008C AGH74078, USA
| | - Yingjun Zhang
- Department of Grassland Science, College of Grassland Science & Technology, China Agricultural University, Beijing, China
| | - Lin Liu
- Department of Grassland Science, College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Xinquan Zhang
- Department of Grassland Science, College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
| | - Feida Sun
- Department of Grassland Science, College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, Sichuan, China
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Müller LM. Underground connections: arbuscular mycorrhizal fungi influence on interspecific plant-plant interactions. PLANT PHYSIOLOGY 2021; 187:1270-1272. [PMID: 34734288 PMCID: PMC8566273 DOI: 10.1093/plphys/kiab397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 08/07/2021] [Indexed: 06/13/2023]
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