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    Abstract437)      PDF(pc) (251KB)(50025)       Save
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    Antioxidant Activity of Solvent Extracts of Xinjiang Propolis and Determination of Quercetin and Chrysin Propolis
    Buwihelqem Ababekri, Mutallip Amet Aminigul, Mamat Nizam Ehet, Yimit Rahman
    Biotechnology Bulletin    2013, 0 (2): 163-171.  
    Abstract384)      PDF(pc) (2778KB)(49778)       Save
    To study the DPPH free radical scavenging activity and anti-lipid peroxidation activity of Kuqa and Yili, and determine the content of the Quercetin and Chrysin in Xinjiang Yili propolis. Different extracts of raw propolis were extracted by four kinds of solvents, taking tea polyphenol as comparison; measure Kuqa and Yili, Xinjiang propolis extracts antioxidant activity in removal of DPPH(1, 1-Diphenyl- 1-picrylhydrazyl)free radicals and antioxidant properties of linoleic acid peroxidation. With 70% ethanol and methanol as solvent to extract Quercetin and Chrysin from Xinjiang Yili propolis, using HPLC(high performance liquid chromatography)to determine the content of the extracted Quercetin and Chrysin, the detection wavelength was 370 nm and 268 nm, respectively. Result showed that propolis different extracts in different concentrations has different scavenging free radical DPPH capacity, in partial experimental groups’ scavenging capacity is even surpassed to same concentration of tea polyphenol group; has antioxidant activity to linoleic acid, in which Yili propolis has higher antiperoxidation activity. The content of Quercetin was the lowest in the without defatted ethanol extracts(2.2950 mg/g), the highest in the defatted methanol extracts(2.8150 mg/g);The content of Chrysin was the lowest in the without defatted methanol extracts(60.72 mg/g), the highest in the defatted methanol extracts(74.37 mg/g). The Kuqa and Yili propolis has a certain extent of antioxidant capacity, this DPPH method is fast, sensitive and simple, this results showed that the Xinjiang propolis is a natural antioxidant, and waiting for further study and utilization; HPLC analysis showed that Quercetin and Chrysin the active ingredients of propolis samples from Xinjiang Yili were detected.
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    Transcriptome and RNA-Seq Technology
    Zhang Chunlan, Qin Zijuan, Wang Guizhi, Ji Zhibin, Wang Jianmin
    Biotechnology Bulletin    2012, 0 (12): 51-56.  
    Abstract1038)      PDF(pc) (1420KB)(7468)       Save
    The transcriptome is the complete set of transcripts for certain type of cells or tissues in a specific developmental stage orphysiological condition. Transcriptome analysis can reveal the organism's gene expressing level, structural variation, discovery of new genes. Theresearch methods and platforms of transcriptome are undergoing rapid changes. And bioinformatics analysis is also improved gradually. RNASeqas a new research method, it can be more quickly and afford more accurate transcriptome’s information while using the Next-generationSequencing(NGS)technology. This article compares several main methods and platforms of transcriptome in recent years, and review theprinciple, purpose, steps, bioinformatics’ analysis and applications in related fields of RNA-Seq. This will be afford useful reference for relatedresearch.
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    Abstract1147)      PDF(pc) (259KB)(5767)       Save
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    The Cancer-related Bioinformatics Databases
    Yang Jian, Cai Haoyang
    Biotechnology Bulletin    2015, 31 (11): 89-101.   DOI: 10.13560/j.cnki.biotech.bull.1985.2015.11.010
    Abstract905)   HTML    PDF(pc) (1223KB)(5127)       Save
    Malignant tumor has become one of the major diseases that takes seriously risks to human health. In recent years, the rapid development of high-throughput detection technology has become an important means in cancer research. In this way, the cancer genomics data accumulated rapidly. These data is important for the research of mechanisms of tumor initiation and development. Massive biological data management and mining have become the foundation and an important field in cancer research. This article describes the frequently used bioinformatics databases of human tumors, including comprehensive databases, databases of genomics, transcriptomics, proteomics, epigenetics, etc. Here we sum up the status quo of database development in China and abroad, and discuss the existing problems to assist current research.
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    Application Research Progress of Proteomics
    Yin Wen, Fu Xu, Li Ping
    Biotechnology Bulletin    2014, 0 (1): 32-38.  
    Abstract1014)      PDF(pc) (1201KB)(3924)       Save
    Proteomics is an emerging discipline for studying proteins composition and function in a type of cell, tissue or body fluids in a large-scale, high-throughput and systematic level. While genes determine the level of protein, but the level of gene expression can not represent the intracellular reactive protein levels. Proteomic analysis is a complement to the study of translation and modification and also an indispensable tool for a comprehensive understanding of genome expression. The development of proteomic technologies has greatly promoted the progress of proteomic research, and it has been widely used in various research fields.This paper revieweded the proteomic technologies and the applications in various fields are also briefly reviewed. Finally, some future issues are presented.
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    Abstract208)      PDF(pc) (647KB)(3904)       Save
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    Research of Reactive Oxygen Species in Plants and Its Application on Stress Tolerance
    Xue Xin, Zhang Qian, Wu Jinxia,
    Biotechnology Bulletin    2013, 0 (10): 6-11.  
    Abstract751)      PDF(pc) (1177KB)(3743)       Save
    The ROS(Reactive oxygen species)is a plant byproduct of aerobic metabolism,environmental stress also makes a large amount of a ROS accumulate in plant cells. Low concentrations of ROS can exist as a signaling molecule to induce the expression of defense genes and plant adaptation to the environment reaction. When the stress force in plant cells produce large amounts of reactive oxygen species, it will cause damage to intracellular macromolecules and other components, to impede normal plant metabolism and growth, and even death. Plants existence of active oxygen scavenging mechanism, the balance can be maintained within a certain range of reactive oxygen species. Studies have shown that the plants active oxygen scavenging mechanism can improve the resistance of plants. In this paper, an overview of the current dynamic of Reactive Oxygen Species, at the same time explore the application of plant active oxygen scavenging mechanism in improving plant stress resistance.
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    Principle of Whole Genome Amplification Technology and Its Progress
    Pan Xiaoming, Liang Xingguo
    Biotechnology Bulletin    2014, 0 (12): 47-54.   DOI: 10.13560/j.cnki.biotech.bull.1985.2014.12.008
    Abstract474)      PDF(pc) (2031KB)(3603)       Save
    The rapid developments of DNA array and next generation sequencing technologies had greatly promoted molecular biology techniques to be used in various fields. However, the limited quantity and quality of sample DNA may affect large scale genetic analyses. To overcome these problems, the whole genome amplification(WGA)technology was employed to amplify trace amounts of genomic DNA to sufficient quantity to meet the requirements of high throughput analyses. The highly efficient and reliable WGA methods also helped to realize large scale of genetic analyses based on even single cell. Moreover, as the single cell level research continues, more efficient WGA approaches were developed. This paper summarized the general WGA methods frequently used before and newly developed methods on basic principle level as well as the advantages and disadvantages of each method, which helped to make good use of the powerful WGA techniques.
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    Research Advances on the Mechanism of Glyceraldehydes-3-phosphate Dehydrogenase in Plant
    Lu Qian, Mi Xiaoju, Cui Jizhe
    Biotechnology Bulletin    2013, 0 (8): 1-6.  
    Abstract560)      PDF(pc) (1372KB)(3460)       Save
    Glycolysis and the Calvin cycle are critical metabolic pathways of energy supply and carbon fixation in plants. Glyceraldehyde-3-phosphate dehydrogenase plays a central role in glycolysis and the Calvin cycle. Recent research results disclosed that the function and regulation of GAPDH turned out to be quite diverse and complex. This article provides an overview of the latest progress on the GAPDH type and function, the specificity interaction of GAPDH and NAD(P), PRK/GAPDH/CP12 complex and regulation, and the mechanism of GAPDH response to stress in plants.
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    Progress on the Studies and Application of Clostridium butyricum
    Zhang Shanting Shi Yan Zhang Shuli Wang Haikuan
    Biotechnology Bulletin    2013, 0 (9): 27-33.  
    Abstract591)      PDF(pc) (1194KB)(3410)       Save
    Clostridium butyricum, as a probiotic has been studied widely, is a spore-forming, gram-positive anaerobe that is found in intestines of healthy animals and humans. As a novel spore-forming probiotic, C. butyricum can withstand the low pH, heat and many antibiotic compared with non-spore forming probiotics, and exert different health effects in host, such as regulation of intestinal microbial homeostasis, stabilization of the gastrointestinal barrier function, enzymatic activity inducing absorption and nutrition, immunomodulatory effects, improvement of the animal production performance. So it will be used more widely. In this paper, we reviewed advances in the biological function, the fermentation technology and the application in clinic and feed additive of C. butyricum. Some advices were also put forward for further research of C. butyricum.Key words: Clostridium butyricum Probiotic Fermentation Clinic Feed additive
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    Research Progresses in the Synthetic Biology of Terpenoids
    SUN Li-chao, LI Shu-ying, WANG Feng-zhong, XIN Feng-jiao
    Biotechnology Bulletin    2017, 33 (1): 64-75.   DOI: 10.13560/j.cnki.biotech.bull.1985.2017.01.007
    Abstract835)   HTML    PDF(pc) (1825KB)(3364)       Save
    The terpenoids represent the largest class of natural products with biological activities of antitumor and anti-allergy,thus they have been widely applied in the area of food,cosmetics and medical health,presenting huge potential and broad market prospects. Recent years,researchers applied functional genomics and metabonomics approaches to deeply study the biosynthesis pathways of terpenoids,providing tons of data for their synthetic biology. The construction of engineered yeasts using synthetic biology enabled the efficient synthesis of multi-target terpenoids,and highly improved the overall production level. Thus,the synthetic biology approach is expected to be an efficient way of producing plant-derived terpenoids. First,we introduced the concept of synthetic biology,summarized the important functions and applications of plant-derived terpenoids,briefly reviewed the biosynthesis pathways,and concluded the alternative production ways. Then,we discussed the design strategies of synthetic biology for terpenoids thoroughly. Finally,we elaborated the advances on the biosynthetic biology of varied terpenes with common terpenes as the studied cases.
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    Research Progress of Bacillus subtilis Expression System and Its Promoter Regulatory Elements
    Yu Xiaoxia, Tian Jian, Liu Xiaoqing, Wu Ningfeng
    Biotechnology Bulletin    2015, 31 (2): 35-44.   DOI: 10.13560/j.cnki.biotech.bull.1985.2015.02.005
    Abstract472)   HTML    PDF(pc) (1414KB)(3247)       Save
    As a Gram-positive bacteria, Bacillus subtilis is an attractive host for the production of heterologous secretory proteins for several reasons:it is non-pathogenic and the capable of secreting functional extracellular proteins directly to the culture medium, a great deal of vital information concerning large scale fermentation and production technology. One of the key factors for achieving high-level expression of heterologous proteins is the use of a strong and control promoter. In present, the promoters of Bacillus subtilis can be classified into three categories:constitutive promoters, inducer-specific promoters and autoinducible promoters. This paper described the advantages and disadvantages of Bacillus subtilis expression system and the classification of promoters. At the same time, we summarized the methods of the amplification of new promoters, which provided a foundation for improving Bacillus subtilis expression systems and the industrial production of heterologous proteins .
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    Genome Wide Association Study: Opportunities and Challenges in Genomic Research
    Zhang Yanming, Xing Guofang, Liu Meitao, Liu Xiaodong, Han Yuanhuai
    Biotechnology Bulletin    2013, 0 (6): 1-6.  
    Abstract729)      PDF(pc) (1355KB)(3213)       Save
    Genome wide association study(GWAS)is about screening for high-density molecular markers in certain populations in the range of the whole genome, then analyzing the correlations between the data of the molecular markers and the phenotypic traits. GWAS opened up a new chapter in genomic and genetic research, enabling linking genomics and genetics in unprecedented scale. GWAS is mainly applied in the analysis of complex traits of human diseases, leading to the identification of a number of genetic variants related to complex diseases and quantitative traits in human, hence it is to become one of the key approaches for human genomics. Application of GWAS in plant genomics just began, yet it has shown great advantages. It is becoming a research trend in plant genomics to use GWAS to discover genes related to complex quantitative traits to guide breeding programs. However, there exist some problems in GWAS, which are not as simple as expected. This review summarizes the current knowledge on GWAS with special emphasis on its applications in human and plant genomes and highlights its potential areas for future research.
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    Gene Editing Tools Mediated by CRISPR-Cas
    Zuo Qisheng, Li Dong, Zhang Ya’ni, Li Bichun
    Biotechnology Bulletin    2014, 0 (7): 37-43.  
    Abstract288)      PDF(pc) (1655KB)(3208)       Save
    Recently, with the deepening of the research and transformation of CRISPR-Cas system, it has been applied as a new gene targeting modification technology, which can be directed to silence target genes. At present, this technology has been successfully used in HEK293, mouse and zebrafish cells and generated stable gene knockout cell lines, meanwhile gene knockout models has been constructed on the models animals such as mice and fruit flies. With the advantages of simple design, short time-consuming and higher efficiency, CRISPR-Cas has become a gene targeting knockout technology with broad application prospect. In this paper, structure and function mechanism of the CRISPR-Cas, also the current applications of Cas9/gRNA were reviewed.
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    Advances and Applications on Methodology of 16S rRNA Sequencing in Gut Microbiota Analysis
    Li Dongping, Guo Mingzhang, Xu Wentao
    Biotechnology Bulletin    2015, 31 (2): 71-77.   DOI: 10.13560/j.cnki.biotech.bull.1985.2015.02.010
    Abstract350)   HTML    PDF(pc) (1090KB)(3175)       Save
    16S rRNA sequencing is one of the high-throughput-sequencing-based methods used in gut microbiota analysis. Almost all the bacterial species in gut microbiota can be quantified through 16S rRNA sequencing, which has made this method into the mainstream. Two issues are very important in the application of 16S rRNA sequencing:sequencing strategy and bioinformatic analysis. In this review, three aspects of the sequencing strategy, including sequencing platform, sequencing region, and data size were discussed. While on bioinformatic analysis, the advance in sequences cluster and annotation, microbiota structure analysis, key taxa screening and functional analysis were reviewed here.
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    Advances of Metatranscriptomics Technology
    Ma Shu, Liu Huhu, Tian Yun, Lu Xiangyang
    Biotechnology Bulletin    2012, 0 (12): 46-50.  
    Abstract441)      PDF(pc) (1362KB)(3016)       Save
    Metatranscriptomics is a new subject to study the transcription situation and regulation rules of entire genomes of colonialorganism under a certain specific environment and period in the overall level. The emergence, research strategies and current applications of theMetatranscriptomic were reviewed briefly and the application prospect of it was also anticipated in this paper.
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    Genetic Analysis of FBA Trait in Upland Cotton with Major Gene Plus Polygenes Mixed Genetic Model
    MA Qi, LI Ji-lian, XU Shou-zhen, CHEN Hong, LIU Wen-hao, NING Xinzhu, LIN Hai
    Biotechnology Bulletin    2022, 38 (10): 148-158.   DOI: 10.13560/j.cnki.biotech.bull.1985.2021-1606
    Abstract326)   HTML5)    PDF(pc) (3670KB)(2968)       Save

    Cotton plant architecture is closely related to cultivation mode,mechanical collection efficiency and yield. Fruit branch angle(FBA)is one of the key factors that determine cotton plant architecture. Exploring the genetic characteristics on FBA of upland cotton(Gossyp-ium hirsutum)will provide important guidance for genetic breeding of cotton plant architecture. In this study,a natural population composed of 418 accessions of upland cotton from different regions,were used as the research object. Then,measuring the FBA with digital display protractor,we performed the variability and correlation analysis of FBA in different positions of cotton main stem,as well as the phenotypic description and statistical analysis of FBA of natural populations in different ecological environments. Simultaneously,the combined populations four generations(P1,P2,F1 and F2)constructed by parents with extremely different fruit branch angles were selected as the research objects,the multi-generation joint genetic analysis of FBA phenotypic traits of the four generations was carried out,and the genetic effect and heritability of major genes were estimated using the mixed genetic model of major gene plus polygenes of plant quantitative traits. Phenotypic identification analysis showed that the coefficient of variation for FBA in the natural population of upland cotton was relatively small,and the average coefficient of variation under the four environments was 5.63%. Furthermore,the middle fruit branch(the 4th-6th position from the base)angles best represented the level of FBA of the whole cotton plant. Additionally,mixed genetic model for major gene plus polygene demonstrated that the optimal model for controlling FBA was two major genes with equal additive effect,the additive effect value of major gene was 3.65,and the heritability was 90.22%. These results revealed that the FBA of upland cotton was mainly controlled by the main gene,and the heritability of the main gene was high. The above results are conducive to clarifying the genetic law of FBA of upland cotton,which is of important practical significance for molecular genetic analysis of FBA and plant architecture genetic breeding of upland cotton.

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    Research Progress of Structural Characteristics and Functions of Calcium-dependent Protein Kinases in Plants
    Jiang Shanshan, Zhang Dan, Kong Xiangpei, Zhou Yan, Li Dequan
    Biotechnology Bulletin    2013, 0 (6): 12-19.  
    Abstract309)      PDF(pc) (1634KB)(2961)       Save
    The calcium ion(Ca2+)is known as a key second messenger in plants, intracellular Ca2+ signals are relayed to downstream(transcription factors, NADPH oxidases genes)via different calcium sensor proteins(CaMs, CaMLs, CBLs, CDPKs), which further causes expression of related genes and responses to abiotic and biotic stresses. Calcium-dependent protein kinases(CDPKs)which are Ser/The protein kinases found in plants and some protozoa, play crucial roles in Ca2+-mediated signaling pathways. CDPKs are encoded by multigene families and are divided into four subgroups. CDPKs exhibit overlapping and distinct expression patterns, sub-cellular localizations, substrate specificities and redundancy and/or diversity functions. Here we review the recent advances on the structural characteristics, expression patterns, localizations, regulations substrates both in vivo and in vitro, inhibitors and functions in response to abiotic and biotic stresses of CDPKs in order to shed light on the functions and regulatory mechanisms.
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    Clone and Function Analysis MiR160f in Common Wild Rice(Oryza rufipogon Griff.)
    Yang Songnan,Wang Jiao,Chen Zongxiang,Tian Xinjie,Zhang Jingwen,Long Yan,Pei Xinwu,Yuan Qianhua
    Biotechnology Bulletin    2014, 0 (11): 114-118.  
    Abstract284)      PDF(pc) (1780KB)(2887)       Save
    MicroRNAs are a class of non-coding RNAs involved in post- transcriptional control of gene expression. Former study on Arabidopsis thaliana reveals that miR160 involves in root cell division and differentiation by regulating auxin response factors(ARF)thus influence the root development. This study cloned miR160f gene from common wild rice and transferred into Arabidopsis thaliana to identify its function. The results showed that over-expression of miR160f decreased the number of rosette leaves, shortened bloting time, leading to early flowering. RT-PCR showed the expressions of gene ARF10,ARF16 and ARF17 are down-regulation caused by miR160f in transgenic Arabidopsis thaliana, while the deficiency of ARF10 and ARF16 protein can inhibit root cap cell differentiation, lose control of cell division and lead to ectopic expansion of apical stem cell populations Therefore, the result demonstrates that miR160 not only influence on root development, but also may influence flowering time of common wild rice.
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    Advances in Metabonomics and Its Applications
    Zhou QiuxiangYu Xiaobin, Tu Guoquan, Wang Qiang, Hu Wenjun, Li Hanguang1, 3
    Biotechnology Bulletin    2013, 0 (1): 49-55.  
    Abstract361)      PDF(pc) (1232KB)(2856)       Save
    Metabonomics(or metabolomics)is an essential part of systems biology. Through the study of metabolic changes inorganisms, their physiological and biochemical status can be known and the internal principle can be discovered. The meaning and research taskof metabonomics were introduced in this paper. Generation, technological platform of metabonomics and its application in plants, microorganisms,disease diagnosis and toxicology were summarized. A review on the development trend and challenges were also given.
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    The Research Progress of Protein Acetylation
    Lü Binna, Liang Wenxing
    Biotechnology Bulletin    2015, 31 (4): 166-174.   DOI: 10.13560/j.cnki.biotech.bull.1985.2015.03.003
    Abstract459)   HTML    PDF(pc) (936KB)(2705)       Save
    Protein acetylation is a ubiquitous, reversible and highly regulated protein post-translational modification. It mainly occurs in ?-NH2 of protein lysine residues. Protein acetylation was firstly reported about 50 years ago, and now has been the international research hotspot in the field of protein. Acetylation is catalyzed by lysine acetyltransferases and lysine deacetylases, It was involved in almost every aspects of biological processes, including transcription, stress response, central metabolism and protein synthesis and degradation, etc. In recent years, the detection technology of acetylation, which includes mass spectrometry(MS)and protein chip and so on, has developed rapidly and provides a powerful tool for advanced study of acetylation. Protein acetylation is widely used and mainly plays an important role in metabolic diseases. In addition, histone deacetylase inhibitor(HDACIs)has become the potential agent to treat a variety of diseases such as heart disease, diabetes, and cancer. This review probes and summarizes the study process, function, detecting techniques and applications of the acetylation, and also discusses the future directions as well as the prospects of protein acetylation research.
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    Advance in the Nucleotide Binding and Oligomerization Domain (NOD)-like Receptors (NLRs)
    Li Yiping, Wang Xiao
    Biotechnology Bulletin    2013, 0 (7): 36-40.  
    Abstract360)      PDF(pc) (1243KB)(2554)       Save
    The innate immune system is the first line of defense against microorganisms, recent studies identified a new kind of protein, the nucleotide binding and oligomerization domain (NOD)-like receptors (NLRs) which can recognize and respond against pathogens, play an important role in the innate immune of the plant and animal. Activation of NLR proteins results in inflammatory responses mediated either by NF-κB, MAPK or Caspase-1 activation. The paper summarized the NLR family and the inflammatory diseases associated with it. The NLR family in the treatment of inflammatory diseases were also prospected.
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