Microbial resources for biopolymer production.

2016 ◽  
pp. 369-387
Author(s):  
F. M. Pelissari ◽  
H. Tibolla ◽  
T. Sartori ◽  
F. C. Menegalli
Keyword(s):  
Microbial Resources

The Distributive Characteristics of Soil Microorganisms at Dry Lake Wetland on Semiarid Grassland

2011 ◽  
Vol 71-78 ◽  
pp. 2882-2886 ◽  
Author(s):  
Yu Qin Shao ◽  
Zi Long Zhao ◽  
Miao Miao Hou ◽  
Hui Min ◽  
Zhong Ling Liu ◽  
...  
Keyword(s):  
Soil Microorganisms ◽  
The Other ◽  
Microbial Biomass C ◽  
Semiarid Grassland ◽  
Typical Steppe ◽  
Exploitation And Utilization ◽  
Significant Difference ◽  
Microbial Resources ◽  
Dry Lake ◽  
Lake Center

This research investigated the distributive characteristics of soil microorganisms at dry lake wetland on semiarid grassland. Four plots, typical steppe (DT), lake side (HB), lake bed (HD), and lake center (HX), were selected from Huitengxile located in semiarid grassland to conducted this investigation. The results showed that the number of aerobic bacteria at DT is 1.07 times that at HB, 1.14 times that at HX, and 1.45 times that at HD. The number of fungi at DT is 3.81 times that at HD, 10.65 times that at HB, and 25.75 times that at HX. There is significant difference between HX, HB and the other two plots (p<0.05). Also, there is significant difference between HD and DT. The number of Spore-forming bacteria at DT is 1.65 times that at HD, 2.15 times that at HB, and 6.35 times that at HX. There is significant difference between HD, HB and the other two plots, as well. The number of actinomycetes at HB is highest which is 2.12 times that at HD, 2.27 times that at DT, and 3.43 times that at HX. Moreover, there is a distinct feature of transverse distribution for soil microorganisms communities at dry lake wetland on semiarid grassland. Excluding actinomycetes, the number of soil microorganisms at dry lake wetland were both lower than that at typical steppe. There is a significant correlation between the total amount of soil microorganisms and microbial biomass C at dry lake wetland. These results can be used as the theoretical foundation for the restoration of degraded lake wetland, and the exploitation and utilization of wetland microbial resources.

Heterotrophic Bacterial Community Structure of Multistage Biofilters in a Commercial Pufferfish Takifugu rubripes RAS

2013 ◽  
Vol 726-731 ◽  
pp. 1621-1627 ◽  
Author(s):  
Zhu Chen ◽  
Ying Liu ◽  
Liang Zi Liu ◽  
Xiao Jing Wang ◽  
Zhi Pei Liu ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Heterotrophic Bacteria ◽  
Diversity Index ◽  
Community Diversity ◽  
Takifugu Rubripes ◽  
Recirculating Aquaculture ◽  
Microbial Resources

The success of a recirculating aquaculture system (RAS) greatly depends on the structure, dynamics and activities of microbial community. Heterotrophic bacteria as the major members play various roles. The heterotrophic bacterial community structure in threestaged biofilters was studied using four different media. 228 isolates belonging to 77species were obtained and affiliated toGammaproteobacteria,Alphaproteobacteria,Bacteroidetes,Firmicutes,ActinobacteriaandBetaproteobacteria.Gammaproteobacteriawas the predominant group. The concurrence was found between potential pathogens (VibrioandShewanella) and probiotics (BacillusandPseudomonas). On the basis of community diversity index, we could infer that differences existed between stages, and the diversity index increased along the biofilters. A comprehensive understanding of microbial community in RAS will be in favor of utilization of microbial resources and optimizing the culture systems' operation.

scholarly journals Exploring Indonesian Microbial Genetic Resources for Industrial Application

2016 ◽  
Author(s):  
Atit Kanti ◽  
◽  
Endang Sukara ◽  
Harmastini Sukiman ◽  
Puspita Lisdiyanti ◽  
...  
Keyword(s):  
Genetic Resources ◽  
Industrial Application ◽  
Sustainable Use ◽  
Culture Collections ◽  
Human Welfare ◽  
Microbial Resources

Indonesia is a mega biodiversity country consisting of various types of animals and plants, including genetic microbial resources. However, the exploration on microbes has not been yet extensively explored. This book highlights some important findings and achievements carried out by the microbiologists in LIPI on the sustainable use of Indonesian microbial genetic resources. Through this book, some successful processes of identification, characterization, and preservation in culture collections of Indonesian microbial genetic resources have been showed vividly. Some of potential microbes useful for human welfare are also described in this book, including their utilization for food, feed, health, and bioenergy. It is expected that this book can be a useful reference for those who are interested in the importance of microbial genetic resources for the prosperity of the nation as it revealed some significant findings on microbes, which have been isolated from various sources in Indonesia.

scholarly journals Exploring Microbial Resource of Different Rhizocompartments of Dominant Plants Along the Salinity Gradient Around the Hypersaline Lake Ejinur

2021 ◽  
Vol 12 ◽  
Author(s):  
Junqing Luo ◽  
Zhechao Zhang ◽  
Yazhou Hou ◽  
Fengwei Diao ◽  
Baihui Hao ◽  
...  
Keyword(s):  
High Throughput Sequencing ◽  
Salt Lake ◽  
Salinity Gradient ◽  
Salt Lakes ◽  
Hypersaline Environment ◽  
Hypersaline Lake ◽  
Littoral Zones ◽  
Microbial Resources ◽  
Bacteria And Fungi

Lake littoral zones can also be regarded as another extremely hypersaline environment due to hypersaline properties of salt lakes. In this study, high-throughput sequencing technique was used to analyze bacteria and fungi from different rhizocompartments (rhizosphere and endosphere) of four dominant plants along the salinity gradient in the littoral zones of Ejinur Salt Lake. The study found that microbial α-diversity did not increase with the decrease of salinity, indicating that salinity was not the main factor on the effect of microbial diversity. Distance-based redundancy analysis and regression analysis were used to further reveal the relationship between microorganisms from different rhizocompartments and plant species and soil physicochemical properties. Bacteria and fungi in the rhizosphere and endosphere were the most significantly affected by SO42–, SOC, HCO3–, and SOC, respectively. Correlation network analysis revealed the potential role of microorganisms in different root compartments on the regulation of salt stress through synergistic and antagonistic interactions. LEfSe analysis further indicated that dominant microbial taxa in different rhizocompartments had a positive response to plants, such as Marinobacter, Palleronia, Arthrobacter, and Penicillium. This study was of great significance and practical value for understanding salt environments around salt lakes to excavate the potential microbial resources.

scholarly journals Microbial diversity in raw milk and Sayram Ketteki from southern of Xinjiang, China

2021 ◽  
Author(s):  
Dongla Gao ◽  
Weihua Wang ◽  
Zhanjiang Han ◽  
Qian Xi ◽  
Ruicheng Guo ◽  
...  
Keyword(s):  
High Throughput ◽  
Fungal Community ◽  
High Throughput Sequencing ◽  
Principal Component ◽  
Raw Milk ◽  
Fermented Milk ◽  
Community Diversity ◽  
Sampling Location ◽  
Fungal Community Structure ◽  
Microbial Resources

Raw milk and fermented milk are rich in microbial resources, which are essential for the formation of texture, flavor and taste. In order to gain a deeper knowledge of the bacterial and fungal community diversity in local raw milk and home-made yogurts from Sayram town, Baicheng county, Akesu area, southern of Xinjiang, China,30 raw milk and 30 home-made yogurt samples were collected and experiment of high-throughput sequencing was implemented.The results of experiments revealed the species of fungi in raw milk was the most, and the species of bacteria in fermented milk was the least.Based on principal component analysis (PCA), it was found that the bacterial and fungal community structure differed in samples from two types of dairy products.And the presence of 15 bacterial and 12 fungal phyla, comprising 218 bacterial and 495 fungal genera respectively, among all samples. Firmicutes and Ascomycota,Lactobacillus and Candida were the predominant phyla and genera of bacteria and fungi, respectively. The results indicated that the microbial community of raw milk differs from home-made yogurts due to sampling location and manufacturing process. The study suggested that high-throughput sequencing could provide a better understanding of microbiological diversity as well as lay a theoretical foundation for selecting beneficial microbial resources from this natural yogurt.

scholarly journals Screening of Heavy Metal-Immobilizing Bacteria and Its Effect on Reducing Cd2+ and Pb2+ Concentrations in Water Spinach (Ipomoea aquatic Forsk.)

2020 ◽  
Vol 17 (9) ◽  
pp. 3122 ◽  
Author(s):  
Tiejun Wang ◽  
Xiaoyu Wang ◽  
Wei Tian ◽  
Lunguang Yao ◽  
Yadong Li ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Dry Weight ◽  
Water Spinach ◽  
Rhizosphere Soils ◽  
Microbial Resources ◽  
Heavy Pollution ◽  
Ipomoea Aquatic ◽  
Bacillus Thuringensis ◽  
Strong Ability

Microbial immobilization is considered as a novel and environmentally friendly technology that uses microbes to reduce heavy metals accumulation in plants. To explore microbial resources which are useful in these applications, three water spinach rhizosphere soils polluted by different levels of heavy metals (heavy pollution (CQ), medium pollution (JZ), and relative clean (NF)) were collected. The community composition of heavy metal-immobilizing bacteria in rhizosphere soils and its effects on reducing the Cd2+ and Pb2+ concentrations in water spinach were evaluated. Four hundred strains were isolated from the CQ (belonging to 3 phyla and 14 genera), JZ (belonging to 4 phyla and 25 genera) and NF (belonged to 6 phyla and 34 genera) samples, respectively. In the CQ sample, 137 strains showed a strong ability to immobilize Cd2+ and Pb2+, giving Cd2+ and Pb2+ removal rates of greater than 80% in solution; Brevundimonas, Serratia, and Pseudoarthrobacter were the main genera. In total, 62 strains showed a strong ability to immobilize Cd2+ and Pb2+ in the JZ sample and Bacillus and Serratia were the main genera. A total of 22 strains showed a strong ability to immobilize Cd2+ and Pb2+ in the NF sample, and Bacillus was the main genus. Compared to the control, Enterobacter bugandensis CQ-7, Bacillus thuringensis CQ-33, and Klebsiella michiganensis CQ-169 significantly increased the dry weight (17.16–148%) of water spinach and reduced the contents of Cd2+ (59.78–72.41%) and Pb2+ (43.36–74.21%) in water spinach. Moreover, the soluble protein and Vc contents in the shoots of water spinach were also significantly increased (72.1–193%) in the presence of strains CQ-7, CQ-33 and CQ-169 compared to the control. In addition, the contents of Cd and Pb in the shoots of water spinach meet the standard for limit of Cd2+ and Pb2+ in vegetables in the presence of strains CQ-7, CQ-33 and CQ-169. Thus, the results provide strains as resources and a theoretical basis for the remediation of Cd- and Pb-contaminated farmlands for the safe production of vegetables.

Microbial Resources from Wild and Captive Animals

2019 ◽  
pp. 39-49
Author(s):  
Birbal Singh ◽  
Gorakh Mal ◽  
Sanjeev K. Gautam ◽  
Manishi Mukesh
Keyword(s):  
Microbial Resources
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