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  1. Article ; Online: Pseudomonas fluorescens

    Wu, Yuanshuang / Xiao, Suhui / Qi, Jiaseng / Gong, Yongchang / Li, Kunzhi

    Plant signaling & behavior

    2022  Volume 17, Issue 1, Page(s) 2100626

    Abstract: ... An ... ...

    Abstract An endophytic
    MeSH term(s) Orchidaceae/microbiology ; Plant Tubers ; Polysaccharides ; Pseudomonas fluorescens ; Seedlings
    Chemical Substances Polysaccharides
    Language English
    Publishing date 2022-08-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1559-2324
    ISSN (online) 1559-2324
    DOI 10.1080/15592324.2022.2100626
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Pseudomonas fluorescens BsEB-1: an endophytic bacterium isolated from the root of Bletilla striata that can promote its growth

    Wu, Yuanshuang / Xiao, Suhui / Qi, Jiaseng / Gong, Yongchang / Li, Kunzhi

    Plant Signaling & Behavior. 2022 Dec. 31, v. 17, no. 1 p.2100626-

    2022  

    Abstract: An endophytic Pseudomonas fluorescens (BsEB-1) was obtained from the roots of Bletilla striata. We investigated its growth-promoting properties and observed the impact of its inoculation on both the growth and polysaccharide content of Bletilla striata ... ...

    Abstract An endophytic Pseudomonas fluorescens (BsEB-1) was obtained from the roots of Bletilla striata. We investigated its growth-promoting properties and observed the impact of its inoculation on both the growth and polysaccharide content of Bletilla striata tubers. It was found that BsEB-1 possessed three growth-promoting activities: phosphate-solubilizing, produced indoleacetic acid (IAA) and siderophores, but had no nitrogen-fixing activity. BsEB-1 could rapidly attach to the root hairs of Bletilla striata tissue culture seedlings and endophytically colonize the region of maturation in the roots. It also significantly promoted the rooting and transplant survival rate of the seedlings, as well as the growth and expansion of the tubers, but did not increase their polysaccharide content. Pseudomonas fluorescens BsEB-1 exhibits potential for applications in the artificial planting of Bletilla striata.
    Keywords Bletilla striata ; Pseudomonas fluorescens ; bacteria ; behavior ; endophytes ; indole acetic acid ; nitrogen fixation ; polysaccharides ; siderophores ; survival rate ; tissue culture ; growth-promoting activity ; endophytic colonization ; rooting and transplant survival rate ; the expansion and growth of Bletilla striata tuber
    Language English
    Dates of publication 2022-1231
    Publishing place Taylor & Francis
    Document type Article ; Online
    ISSN 1559-2324
    DOI 10.1080/15592324.2022.2100626
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  3. Article: Overexpression of a peroxidase gene (AtPrx64) of Arabidopsis thaliana in tobacco improves plant’s tolerance to aluminum stress

    Wu, Yuanshuang / Zhili Yang / Jingyi How / Huini Xu / Limei Chen / Kunzhi Li

    Plant molecular biology. 2017 Sept., v. 95, no. 1-2

    2017  

    Abstract: KEY MESSAGE: AtPrx64 is one of the peroxidases gene up-regulated in Al stress and has some functions in the formation of plant second cell wall. Its overexpression may improve plant tolerance to Al by some ways. Studies on its function under Al stress ... ...

    Abstract KEY MESSAGE: AtPrx64 is one of the peroxidases gene up-regulated in Al stress and has some functions in the formation of plant second cell wall. Its overexpression may improve plant tolerance to Al by some ways. Studies on its function under Al stress may help us to understand the mechanism of plant tolerance to Al stress. In Arabidopsis thaliana, the expressions of some genes (AtPrxs) encoding class III plant peroxidases have been found to be either up-regulated or down-regulated under aluminum (Al) stress. Among 73 genes that encode AtPrxs in Arabidopsis, AtPrx64 is always up-regulated by Al stress, suggesting this gene plays protective roles in response to such stress. In this study, transgenic tobacco plants were generated to examine the effects of overexpressing of AtPrx64 gene on the tolerance to Al stress. The results showed that overexpression of AtPrx64 gene increased the root growth and reduced the accumulation of Al and ROS in the roots. Compared with wild type controls, transgenic tobaccos had much less soluble proteins and malondialdehyde in roots and much more root citrate exudation. The activity of plasma membrane (PM) H⁺-ATPase, the phosphorylation of PM H⁺-ATPase and its interaction with 14-3-3 proteins increased in transgenic tobaccos; moreover, the content of lignin in root tips also increased. Taken together, these results showed that overexpression of AtPrx64 gene might enhance the tolerance of tobacco to Al stress.
    Keywords Arabidopsis thaliana ; H-transporting ATP synthase ; aluminum ; cell walls ; citrates ; exudation ; gene expression regulation ; gene overexpression ; genes ; lignin ; malondialdehyde ; peroxidase ; phosphorylation ; plasma membrane ; protective effect ; proteins ; root growth ; root tips ; tobacco ; transgenic plants
    Language English
    Dates of publication 2017-09
    Size p. 157-168.
    Publishing place Springer Netherlands
    Document type Article
    ZDB-ID 778032-1
    ISSN 1573-5028 ; 0167-4412
    ISSN (online) 1573-5028
    ISSN 0167-4412
    DOI 10.1007/s11103-017-0644-2
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Overexpression of a peroxidase gene (AtPrx64) of Arabidopsis thaliana in tobacco improves plant's tolerance to aluminum stress.

    Wu, Yuanshuang / Yang, Zhili / How, Jingyi / Xu, Huini / Chen, Limei / Li, Kunzhi

    Plant molecular biology

    2017  Volume 95, Issue 1-2, Page(s) 157–168

    Abstract: Key message: AtPrx64 is one of the peroxidases gene up-regulated in Al stress and has some functions in the formation of plant second cell wall. Its overexpression may improve plant tolerance to Al by some ways. Studies on its function under Al stress ... ...

    Abstract Key message: AtPrx64 is one of the peroxidases gene up-regulated in Al stress and has some functions in the formation of plant second cell wall. Its overexpression may improve plant tolerance to Al by some ways. Studies on its function under Al stress may help us to understand the mechanism of plant tolerance to Al stress. In Arabidopsis thaliana, the expressions of some genes (AtPrxs) encoding class III plant peroxidases have been found to be either up-regulated or down-regulated under aluminum (Al) stress. Among 73 genes that encode AtPrxs in Arabidopsis, AtPrx64 is always up-regulated by Al stress, suggesting this gene plays protective roles in response to such stress. In this study, transgenic tobacco plants were generated to examine the effects of overexpressing of AtPrx64 gene on the tolerance to Al stress. The results showed that overexpression of AtPrx64 gene increased the root growth and reduced the accumulation of Al and ROS in the roots. Compared with wild type controls, transgenic tobaccos had much less soluble proteins and malondialdehyde in roots and much more root citrate exudation. The activity of plasma membrane (PM) H
    MeSH term(s) 14-3-3 Proteins/metabolism ; Adaptation, Physiological/drug effects ; Adaptation, Physiological/genetics ; Aluminum/toxicity ; Arabidopsis/enzymology ; Arabidopsis/genetics ; Arabidopsis Proteins/chemistry ; Arabidopsis Proteins/genetics ; Arabidopsis Proteins/metabolism ; Cell Membrane/drug effects ; Cell Membrane/enzymology ; Citrates/metabolism ; Genes, Plant ; Hydrogen Peroxide/metabolism ; Lignin/metabolism ; Lipid Peroxidation/drug effects ; Malondialdehyde/metabolism ; Phosphorylation/drug effects ; Plant Roots/drug effects ; Plant Roots/genetics ; Plant Roots/growth & development ; Plants, Genetically Modified ; Protein Binding/drug effects ; Proton-Translocating ATPases/metabolism ; Solubility ; Stress, Physiological/drug effects ; Stress, Physiological/genetics ; Thioglycolates/metabolism ; Nicotiana/drug effects ; Nicotiana/genetics ; Nicotiana/growth & development ; Nicotiana/physiology
    Chemical Substances 14-3-3 Proteins ; Arabidopsis Proteins ; Citrates ; Thioglycolates ; Malondialdehyde (4Y8F71G49Q) ; 2-mercaptoacetate (7857H94KHM) ; Lignin (9005-53-2) ; Hydrogen Peroxide (BBX060AN9V) ; Aluminum (CPD4NFA903) ; Proton-Translocating ATPases (EC 3.6.3.14)
    Language English
    Publishing date 2017-08-16
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 778032-1
    ISSN 1573-5028 ; 0167-4412
    ISSN (online) 1573-5028
    ISSN 0167-4412
    DOI 10.1007/s11103-017-0644-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: [Endophytic fungal diversity of four bryophyte species in Dawei Mountain, Southwest of China].

    Zhou, Wenna / Wu, Yuanshuang / Chu, Long / Li, Wei / Li, Haiyan

    Wei sheng wu xue bao = Acta microbiologica Sinica

    2015  Volume 55, Issue 6, Page(s) 764–771

    Abstract: Objective: We analyzed endophytic fungi from 4 bryophyte species: Mnium sp. , Marchantia polymorpha, Polytrichum commune and Hylocomium splendens, collected from Dawei Mountain, Southwest of China, to study the diversity of fungal endophytes of ... ...

    Abstract Objective: We analyzed endophytic fungi from 4 bryophyte species: Mnium sp. , Marchantia polymorpha, Polytrichum commune and Hylocomium splendens, collected from Dawei Mountain, Southwest of China, to study the diversity of fungal endophytes of bryophytes in different environment and their roles in the evolution from aquaqtic plant to terrestrial plant.
    Methods: Endophytic fungi were isolated by culturable method and identified to species or genera level based on morphological characteristics and molecular analysis.
    Results: Nine hundred fungal endophytes were isolated from 630 tissue segments of 4 different plants. All endophytes were identified to 57 taxon. Among them, Xylaria, Colletotrichum, Penicillium and Trichoderma were the dominant genera. The Shannon index (H') and similarity coefficients (CS) of endophytic fungi from 4 plants were 1.80 - 3.22 and 0.409 - 0.613, respectively, higher than those of bryophytes growing in extreme environments.
    Conclusion: The diversity and richness of endophytes from 4 bryophytes in Dawei Mountain are similar to those of plants growing in the similar environment.
    MeSH term(s) Biodiversity ; Bryophyta/microbiology ; China ; Endophytes/classification ; Endophytes/genetics ; Endophytes/isolation & purification ; Fungi/classification ; Fungi/genetics ; Fungi/isolation & purification ; Phylogeny ; Plant Leaves/microbiology ; Plant Roots/microbiology
    Language Chinese
    Publishing date 2015-06-04
    Publishing country China
    Document type English Abstract ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 412683-x
    ISSN 0001-6209 ; 0098-9150
    ISSN 0001-6209 ; 0098-9150
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Study of characteristic aroma components of baked Wujiatai green tea by HS-SPME/GC-MS combined with principal component analysis

    Wu, Yuanshuang / Chen Wang / Ming Lian / Qingxiong Meng / Shidong Lv / Xuemei Gao

    CyTA: journal of food. 2016 July 2, v. 14, no. 3

    2016  

    Abstract: In this study, the aroma components of six Wujiatai green teas were extracted and identified using headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS), and principal component analysis (PCA) was ... ...

    Abstract In this study, the aroma components of six Wujiatai green teas were extracted and identified using headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS), and principal component analysis (PCA) was further used to reveal possible differences in these teas based on their aroma components. The results showed that, although there are some similarities in the aroma composition and content between Wujiatai green tea and regular green and black teas, the former had its own unique aroma characteristics. We suggest that the ‘baking’ procedure of Wujiatai green tea possibly causes the formation and/or increase of some aroma components, thus resulting in a more durable and prominent aroma characteristic as well as superior quality compared with the other teas investigated in this paper.
    Keywords baking ; black tea ; gas chromatography-mass spectrometry ; green tea ; headspace analysis ; odors ; principal component analysis ; solid phase microextraction
    Language English
    Dates of publication 2016-0702
    Size p. 423-432.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 1947-6345
    DOI 10.1080/19476337.2015.1123298
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  7. Article: Oolong tea made from tea plants from different locations in Yunnan and Fujian, China showed similar aroma but different taste characteristics.

    Wang, Chen / Lv, Shidong / Wu, Yuanshuang / Gao, Xuemei / Li, Jiangbing / Zhang, Wenrui / Meng, Qingxiong

    SpringerPlus

    2016  Volume 5, Page(s) 576

    Abstract: Consistent aroma characteristics are important for tea products. However, understanding the formation of tea aroma flavor and correspondingly proposing applicable protocols to control tea quality and consistency remain major challenges. Oolong tea is one ...

    Abstract Consistent aroma characteristics are important for tea products. However, understanding the formation of tea aroma flavor and correspondingly proposing applicable protocols to control tea quality and consistency remain major challenges. Oolong tea is one of the most popular teas with a distinct flavor. Generally, oolong tea is processed with the leaves of tea trees belonging to different subspecies and grown in significantly different regions. In this study, Yunnan and Fujian oolong teas, green tea, black tea, and Pu-erh tea were collected from major tea estates across China. Their sensory evaluation, main water-soluble and volatile compounds were identified and measured. The sensory evaluation, total polysaccharide, caffeine, and catechin content of Yunnan oolong tea was found to be different from that of Fujian oolong tea, a result suggesting that the kinds of tea leaves used in Yunnan and Fujian oolong teas were naturally different. However, according to their aroma compounds, principal component analysis (PCA) and cluster analysis (CA) of the volatile compounds showed that the two types of oolong teas were similar and cannot be clearly distinguished from each other; they are also different from green, black, and Pu-erh teas, a result indicating that the same oolong tea processing technology applied to different tea leaves results in consistent aroma characteristics. The PCA analysis results also indicated that benzylalcohol, indole, safranal, linalool oxides, β-ionone, and hexadecanoic acid methyl ester highly contributed to the distinct aroma of oolong tea compared with the other three types of teas. This study proved that the use of the same processing technology on two kinds of tea leaves resulted in a highly consistent tea aroma.
    Language English
    Publishing date 2016-05-10
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2661116-8
    ISSN 2193-1801
    ISSN 2193-1801
    DOI 10.1186/s40064-016-2229-y
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  8. Article ; Online: Study of aroma formation and transformation during the manufacturing process of Biluochun green tea in Yunnan Province by HS-SPME and GC-MS.

    Wang, Chen / Lv, Shidong / Wu, Yuanshuang / Lian, Ming / Gao, Xuemei / Meng, Qingxiong

    Journal of the science of food and agriculture

    2016  Volume 96, Issue 13, Page(s) 4492–4498

    Abstract: Background: Biluochun is a typical non-fermented tea and is also famous for its unique aroma in China. Few studies have been performed to evaluate the effect of the manufacturing process on the formation and content of its aroma.: Results: The ... ...

    Abstract Background: Biluochun is a typical non-fermented tea and is also famous for its unique aroma in China. Few studies have been performed to evaluate the effect of the manufacturing process on the formation and content of its aroma.
    Results: The volatile components were extracted at different manufacturing process steps of Biluochun green tea using fully automated headspace solid-phase microextraction (HS-SPME) and further characterised by gas chromatography-mass spectrometry (GC-MS). Among 67 volatile components collected, the fractions of linalool oxides, β-ionone, phenylacetaldehyde, aldehydes, ketones, and nitrogen compounds were increased while alcohols and hydrocarbons declined during the manufacturing process. The aroma compounds decreased the most during the drying steps.
    Conclusion: We identified a number of significantly changed components that can be used as markers and quality control during the producing process of Biluochun. The drying step played a major role in the aroma formation of green tea products and should be the most important step for quality control. © 2016 Society of Chemical Industry.
    MeSH term(s) Analytic Sample Preparation Methods ; Automation, Laboratory ; Biomarkers/analysis ; Camellia sinensis/chemistry ; Camellia sinensis/growth & development ; Camellia sinensis/metabolism ; China ; Food Handling ; Food Inspection/methods ; Food Quality ; Freeze Drying ; Gas Chromatography-Mass Spectrometry ; Hot Temperature ; Odorants ; Plant Leaves/chemistry ; Plant Leaves/growth & development ; Plant Leaves/metabolism ; Plant Shoots/chemistry ; Plant Shoots/growth & development ; Plant Shoots/metabolism ; Quality Control ; Solid Phase Microextraction ; Tea/chemistry ; Terpenes/analysis ; Terpenes/chemistry ; Terpenes/metabolism ; Volatile Organic Compounds/analysis ; Volatile Organic Compounds/chemistry ; Volatile Organic Compounds/metabolism ; Volatilization
    Chemical Substances Biomarkers ; Tea ; Terpenes ; Volatile Organic Compounds
    Language English
    Publishing date 2016-10
    Publishing country England
    Document type Comparative Study ; Journal Article
    ZDB-ID 184116-6
    ISSN 1097-0010 ; 0022-5142
    ISSN (online) 1097-0010
    ISSN 0022-5142
    DOI 10.1002/jsfa.7663
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Comparative analysis of volatiles difference of Yunnan sun-dried Pu-erh green tea from different tea mountains: Jingmai and Wuliang mountain by chemical fingerprint similarity combined with principal component analysis and cluster analysis.

    Wu, Yuanshuang / Lv, Shidong / Wang, Chen / Gao, Xuemei / Li, Jiangbing / Meng, Qingxiong

    Chemistry Central journal

    2016  Volume 10, Page(s) 11

    Abstract: Background: Modern instrumental analysis technology can provide various chemical data and information on tea samples. Unfortunately, it remains difficult to extract the useful information. We describe the use of chemical fingerprint similarities, ... ...

    Abstract Background: Modern instrumental analysis technology can provide various chemical data and information on tea samples. Unfortunately, it remains difficult to extract the useful information. We describe the use of chemical fingerprint similarities, combined with principal component and cluster analyses, to distinguish and recognize Pu-erh green teas, which from two tea mountains, Wuliang and Jingmai, in the Pu-erh district of Yunnan province. The volatile components of all 20 Pu-erh green teas (10 Wuliang and 10 Jingmai teas) were extracted and identified by headspace solid-phase micro extraction (HS-SPME) combined with gas chromatography-mass spectrometry (GC-MS).
    Results: Sixty-three volatiles (including alcohols, hydrocarbons, ketones, and aldehydes) were identified in the 20 Pu-erh green teas, and differences in compound compositions between them were also observed. Through fingerprint similarity, combined with principal component and cluster analyses, the 20 Pu-erh green teas were differentiated successfully based on their volatile characteristics.
    Conclusions: This study demonstrates that the GC-MS combined with chemical fingerprint and unsupervised pattern recognition method is suitable for the investigation of the volatile profiling and evaluating the quality and authenticity of teas related to the different origins.Graphical abstractDifferentiate Pu-erh green teas from different tea mountains by using chemical fingerprint similarity and multivariate statistical methods.
    Language English
    Publishing date 2016-03-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 2272440-0
    ISSN 1752-153X
    ISSN 1752-153X
    DOI 10.1186/s13065-016-0159-y
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  10. Article: Application of gas chromatography-mass spectrometry and chemometrics methods for assessing volatile profiles of Pu-erh tea with different processing methods and ageing years

    Lv, Shidong / Gao, Xuemei / Lian, Ming / Meng, Qingxiong / Wang, Chen / Wei, Jifu / Wu, Yuanshuang

    RSC advances. 2015 Oct. 15, v. 5, no. 107

    2015  

    Abstract: Volatile changes and the post-fermentation ageing process of tea remain largely unknown. Additionally, the understanding of ageing and storage processes of tea mostly rely on sensory experience and lack the support of scientific and accurate data. In ... ...

    Abstract Volatile changes and the post-fermentation ageing process of tea remain largely unknown. Additionally, the understanding of ageing and storage processes of tea mostly rely on sensory experience and lack the support of scientific and accurate data. In this paper, a method was developed based on head-space solid phase microextraction/gas chromatography-mass spectrometry (HS-SPME/GC-MS) combined with multivariate statistical methods to assess volatile profiles in different types of Pu-erh teas, including raw, ripe and aged Pu-erh teas. A total of 122 aroma components were identified in 57 Pu-erh teas. Differences in the manufacturing method and years in storage of Pu-erh teas resulted in different compositions and contents of volatile components. The characteristic volatiles in aged teas were hexadecanoic acid, dihydroactinidiolide, caffeine, linalool, 6,10,14-trimethyl-2-pentadecanone, β-ionone, cedrol, and phytol; the characteristic volatiles in raw teas were linalool, tridecane, caffeine, dihydroactinidiolide, β-ionone, 6,10,14-trimethyl-2-pentadecanone, dodecane, etc.; and the characteristic volatiles in ripe teas were 1,2,3-trimethoxybenzene, hexadecanoic acid, 1,2,4-trimethoxybenzene, dihydroactinidiolide, 6,10,14-trimethyl-2-pentadecanon, caffeine, and 1,2,3-trimethoxy-5-methyl-benzene. Through principal component analysis (PCA), clustering analysis (CA) and orthogonal projection to latent structures-discriminate analysis (OPLS-DA), three different kinds of Pu-erh teas were classified successfully. Additionally, aged Pu-erh teas showed similar volatile constituents as ripe teas. This study suggested that HS-SPME/GC-MS combined with chemometrics methods is accurate, sensitive, fast, universal and ideal for rapid routine analysis and discrimination of Pu-erh teas with different processing technologies and storage times.
    Keywords beta-ionone ; caffeine ; cedrol ; chemometrics ; cluster analysis ; gas chromatography-mass spectrometry ; headspace analysis ; linalool ; manufacturing ; multivariate analysis ; odors ; palmitic acid ; principal component analysis ; solid phase microextraction ; tea ; volatile compounds
    Language English
    Dates of publication 2015-1015
    Size p. 87806-87817.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c5ra15381f
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