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  1. Article ; Online: Plant specialized metabolites in the rhizosphere of tomatoes: secretion and effects on microorganisms.

    Nakayasu, Masaru / Takamatsu, Kyoko / Yazaki, Kazufumi / Sugiyama, Akifumi

    Bioscience, biotechnology, and biochemistry

    2022  

    Abstract: Plants interact with microorganisms in the phyllosphere and rhizosphere. Here the roots exude plant specialized metabolites (PSM) that have diverse biological and ecological functions. Recent reports have shown that these PSMs influence the rhizosphere ... ...

    Abstract Plants interact with microorganisms in the phyllosphere and rhizosphere. Here the roots exude plant specialized metabolites (PSM) that have diverse biological and ecological functions. Recent reports have shown that these PSMs influence the rhizosphere microbiome, which is essential for the plant's growth and health. This review summarizes several specialized metabolites secreted into the rhizosphere of the tomato plant (Solanum lycopersicum), which is an important model species for plant research and a commercial crop. In this review, we focused on the effects of such plant metabolites on plant-microbe interactions. We also reviewed recent studies on improving the growth of tomatoes by analyzing and reconstructing the rhizosphere microbiome and discussed the challenges to be addressed in establishing sustainable agriculture.
    Language English
    Publishing date 2022-11-14
    Publishing country England
    Document type Journal Article
    ZDB-ID 1106450-x
    ISSN 1347-6947 ; 0916-8451
    ISSN (online) 1347-6947
    ISSN 0916-8451
    DOI 10.1093/bbb/zbac181
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  2. Article: Triterpenoid and Steroidal Saponins Differentially Influence Soil Bacterial Genera.

    Nakayasu, Masaru / Yamazaki, Shinichi / Aoki, Yuichi / Yazaki, Kazufumi / Sugiyama, Akifumi

    Plants (Basel, Switzerland)

    2021  Volume 10, Issue 10

    Abstract: Plant specialized metabolites (PSMs) are secreted into the rhizosphere, i.e., the soil zone surrounding the roots of plants. They are often involved in root-associated microbiome assembly, but the association between PSMs and microbiota is not well ... ...

    Abstract Plant specialized metabolites (PSMs) are secreted into the rhizosphere, i.e., the soil zone surrounding the roots of plants. They are often involved in root-associated microbiome assembly, but the association between PSMs and microbiota is not well characterized. Saponins are a group of PSMs widely distributed in angiosperms. In this study, we compared the bacterial communities in field soils treated with the pure compounds of four different saponins. All saponin treatments decreased bacterial α-diversity and caused significant differences in β-diversity when compared with the control. The bacterial taxa depleted by saponin treatments were higher than the ones enriched; two families, Burkholderiaceae and Methylophilaceae, were enriched, while eighteen families were depleted with all saponin treatments. Sphingomonadaceae, which is abundant in the rhizosphere of saponin-producing plants (tomato and soybean), was enriched in soil treated with α-solanine, dioscin, and soyasaponins. α-Solanine and dioscin had a steroid-type aglycone that was found to specifically enrich Geobacteraceae, Lachnospiraceae, and Moraxellaceae, while soyasaponins and glycyrrhizin with an oleanane-type aglycone did not specifically enrich any of the bacterial families. At the bacterial genus level, the steroidal-type and oleanane-type saponins differentially influenced the soil bacterial taxa. Together, these results indicate that there is a relationship between the identities of saponins and their effects on soil bacterial communities.
    Language English
    Publishing date 2021-10-15
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10102189
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  3. Article ; Online: α-Tomatine gradient across artificial roots recreates the recruitment of tomato root-associated

    Takamatsu, Kyoko / Toyofuku, Miwako / Okutani, Fuki / Yamazaki, Shinichi / Nakayasu, Masaru / Aoki, Yuichi / Kobayashi, Masaru / Ifuku, Kentaro / Yazaki, Kazufumi / Sugiyama, Akifumi

    Plant direct

    2023  Volume 7, Issue 12, Page(s) e550

    Abstract: α-Tomatine is a major saponin that accumulates in tomatoes ( ...

    Abstract α-Tomatine is a major saponin that accumulates in tomatoes (
    Language English
    Publishing date 2023-12-18
    Publishing country England
    Document type Journal Article
    ISSN 2475-4455
    ISSN (online) 2475-4455
    DOI 10.1002/pld3.550
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  4. Article ; Online: An isoflavone catabolism gene cluster underlying interkingdom interactions in the soybean rhizosphere.

    Aoki, Noritaka / Shimasaki, Tomohisa / Yazaki, Wataru / Sato, Tomoaki / Nakayasu, Masaru / Ando, Akinori / Kishino, Shigenobu / Ogawa, Jun / Masuda, Sachiko / Shibata, Arisa / Shirasu, Ken / Yazaki, Kazufumi / Sugiyama, Akifumi

    ISME communications

    2024  Volume 4, Issue 1, Page(s) ycae052

    Abstract: Plant roots secrete various metabolites, including plant specialized metabolites, into the rhizosphere, and shape the rhizosphere microbiome, which is crucial for the plant health and growth. Isoflavones are major plant specialized metabolites found in ... ...

    Abstract Plant roots secrete various metabolites, including plant specialized metabolites, into the rhizosphere, and shape the rhizosphere microbiome, which is crucial for the plant health and growth. Isoflavones are major plant specialized metabolites found in legume plants, and are involved in interactions with soil microorganisms as initiation signals in rhizobial symbiosis and as modulators of the legume root microbiota. However, it remains largely unknown the molecular basis underlying the isoflavone-mediated interkingdom interactions in the legume rhizosphere. Here, we isolated
    Language English
    Publishing date 2024-04-09
    Publishing country England
    Document type Journal Article
    ISSN 2730-6151
    ISSN (online) 2730-6151
    DOI 10.1093/ismeco/ycae052
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Triterpenoid and Steroidal Saponins Differentially Influence Soil Bacterial Genera

    Nakayasu, Masaru / Yamazaki, Shinichi / Aoki, Yuichi / Yazaki, Kazufumi / Sugiyama, Akifumi

    Plants. 2021 Oct. 15, v. 10, no. 10

    2021  

    Abstract: Plant specialized metabolites (PSMs) are secreted into the rhizosphere, i.e., the soil zone surrounding the roots of plants. They are often involved in root-associated microbiome assembly, but the association between PSMs and microbiota is not well ... ...

    Abstract Plant specialized metabolites (PSMs) are secreted into the rhizosphere, i.e., the soil zone surrounding the roots of plants. They are often involved in root-associated microbiome assembly, but the association between PSMs and microbiota is not well characterized. Saponins are a group of PSMs widely distributed in angiosperms. In this study, we compared the bacterial communities in field soils treated with the pure compounds of four different saponins. All saponin treatments decreased bacterial α-diversity and caused significant differences in β-diversity when compared with the control. The bacterial taxa depleted by saponin treatments were higher than the ones enriched; two families, Burkholderiaceae and Methylophilaceae, were enriched, while eighteen families were depleted with all saponin treatments. Sphingomonadaceae, which is abundant in the rhizosphere of saponin-producing plants (tomato and soybean), was enriched in soil treated with α-solanine, dioscin, and soyasaponins. α-Solanine and dioscin had a steroid-type aglycone that was found to specifically enrich Geobacteraceae, Lachnospiraceae, and Moraxellaceae, while soyasaponins and glycyrrhizin with an oleanane-type aglycone did not specifically enrich any of the bacterial families. At the bacterial genus level, the steroidal-type and oleanane-type saponins differentially influenced the soil bacterial taxa. Together, these results indicate that there is a relationship between the identities of saponins and their effects on soil bacterial communities.
    Keywords Burkholderiaceae ; Geobacteraceae ; Lachnospiraceae ; Methylophilaceae ; Moraxellaceae ; Sphingomonadaceae ; glycyrrhizin ; metabolites ; microbiome ; rhizosphere ; soil ; soil bacteria ; soybeans ; steroid saponins ; tomatoes ; triterpenoids
    Language English
    Dates of publication 2021-1015
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2704341-1
    ISSN 2223-7747
    ISSN 2223-7747
    DOI 10.3390/plants10102189
    Database NAL-Catalogue (AGRICOLA)

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  6. Article: Two Distinct Soil Disinfestations Differently Modify the Bacterial Communities in a Tomato Field

    Nakayasu, Masaru / Ikeda, Kyoko / Yamazaki, Shinichi / Aoki, Yuichi / Yazaki, Kazufumi / Washida, Haruhiko / Sugiyama, Akifumi

    Agronomy. 2021 July 07, v. 11, no. 7

    2021  

    Abstract: Reductive soil disinfestation (RSD) and soil solarization (SS) were evaluated based on environmental factors, microbiome, and suppression of Fusarium oxysporum in a tomato field soil. Soil environmental factors (moisture content, electric conductivity, ... ...

    Abstract Reductive soil disinfestation (RSD) and soil solarization (SS) were evaluated based on environmental factors, microbiome, and suppression of Fusarium oxysporum in a tomato field soil. Soil environmental factors (moisture content, electric conductivity, pH, and redox potential (RP)) were measured during soil disinfestations. All factors were more strongly influenced by RSD than SS. 16S rRNA amplicon sequencing of RSD- and SS-treated soils was performed. The bacterial communities were taxonomically and functionally distinct depending on treatment methods and periods and significantly correlated with pH and RP. Fifty-four pathways predicted by PICRUSt2 (third level in MetaCyc hierarchy) were significantly different between RSD and SS. Quantitative polymerase chain reaction demonstrated that both treatments equally suppressed F. oxysporum. The growth and yield of tomato cultivated after treatments were similar between RSD and SS. RSD and SS shaped different soil bacterial communities, although the effects on pathogen suppression and tomato plant growth were comparable between treatments. The existence of pathogen-suppressive microbes, other than Clostridia previously reported to have an effect, was suggested. Comparison between RSD and SS provides new aspects of unknown disinfestation patterns and the usefulness of SS as an alternative to RSD.
    Keywords Clostridia ; Fusarium oxysporum ; agronomy ; disease control ; disinfestation ; electrical conductivity ; microbiome ; pH ; plant growth ; quantitative polymerase chain reaction ; redox potential ; soil ; soil bacteria ; soil solarization ; tomatoes ; water content
    Language English
    Dates of publication 2021-0707
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2607043-1
    ISSN 2073-4395
    ISSN 2073-4395
    DOI 10.3390/agronomy11071375
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Biosynthesis of dillapiole/apiole in dill (Anethum graveolens): characterization of regioselective phenylpropene O‐methyltransferase

    Koeduka, Takao / Watanabe, Bunta / Shirahama, Konomi / Nakayasu, Masaru / Suzuki, Shiro / Furuta, Takumi / Suzuki, Hideyuki / Matsui, Kenji / Kosaka, Tomoyuki / Ozaki, Shin‐ichi

    The Plant Journal. 2023 Feb., v. 113, no. 3 p.562-575

    2023  

    Abstract: The phenylpropene volatiles dillapiole and apiole impart one of the characteristic aromas of dill (Anethum graveolens) weeds. However, very few studies have been conducted to investigate the chemical composition of volatile compounds from different ... ...

    Abstract The phenylpropene volatiles dillapiole and apiole impart one of the characteristic aromas of dill (Anethum graveolens) weeds. However, very few studies have been conducted to investigate the chemical composition of volatile compounds from different developmental stages and plant parts of A. graveolens. In this study, we examined the distribution of volatile phenylpropenes, including dillapiole, in dill plants at various developmental stages. We observed that young dill seedlings accumulate high levels of dillapiole and apiole, whereas a negligible proportion was found in the flowering plants and dry seeds. Based on transcriptomics and co‐expression approaches with phenylpropene biosynthesis genes, we identified dill cDNA encoding S‐adenosyl‐L‐methionine‐dependent O‐methyltransferase 1 (AgOMT1), an enzyme that can convert 6‐ and 2‐hydroxymyristicin to dillapiole and apiole, respectively, via the methylation of the ortho‐hydroxy group. The AgOMT1 protein shows an apparent Kₘ value of 3.5 μm for 6‐hydroxymyristicin and is 75% identical to the anise (Pimpinella anisum) O‐methyltransferase (PaAIMT1) that can convert isoeugenol to methylisoeugenol via methylation of the hydroxy group at the para‐position of the benzene ring. AgOMT1 showed a preference for 6‐hydroxymyristicin, whereas PaAIMT1 displayed a large preference for isoeugenol. In vitro mutagenesis experiments demonstrated that substituting only a few residues can substantially affect the substrate specificity of these enzymes. Other plants belonging to the Apiaceae family contained homologous O‐methyltransferase (OMT) proteins highly similar to AgOMT1, converting 6‐hydroxymyristicin to dillapiole. Our results indicate that apiaceous phenylpropene OMTs with ortho‐methylating activity evolved independently of phenylpropene OMTs of other plants and the enzymatic function of AgOMT1 and PaAIMT1 diverged recently.
    Keywords Anethum graveolens ; Pimpinella anisum ; anise ; benzene ; biosynthesis ; chemical composition ; dill ; eugenol ; methylation ; methyltransferases ; mutagenesis ; regioselectivity ; substrate specificity ; transcriptomics
    Language English
    Dates of publication 2023-02
    Size p. 562-575.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 1088037-9
    ISSN 1365-313X ; 0960-7412
    ISSN (online) 1365-313X
    ISSN 0960-7412
    DOI 10.1111/tpj.16068
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    In stock of ZB MED Bonn / Germany

    Z 6071: Show issues

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  8. Article ; Online: Enhancement of developmentally regulated daidzein secretion from soybean roots in field conditions as compared with hydroponic culture.

    Toyofuku, Miwako / Okutani, Fuki / Nakayasu, Masaru / Hamamoto, Shoichiro / Takase, Hisabumi / Yazaki, Kazufumi / Sugiyama, Akifumi

    Bioscience, biotechnology, and biochemistry

    2021  Volume 85, Issue 5, Page(s) 1165–1169

    Abstract: Analyses of metabolite secretions by field-grown plants remain scarce. We analyzed daidzein secretion by field-grown soybean. Daidzein secretion was higher during early vegetative stages than reproductive stages, a trend that was also seen for ... ...

    Abstract Analyses of metabolite secretions by field-grown plants remain scarce. We analyzed daidzein secretion by field-grown soybean. Daidzein secretion was higher during early vegetative stages than reproductive stages, a trend that was also seen for hydroponically grown soybean. Daidzein secretion was up to 10 000-fold higher under field conditions than hydroponic conditions, leading to a more accurate simulation of rhizosphere daidzein content.
    MeSH term(s) Genistein/isolation & purification ; Genistein/metabolism ; Glucosides/biosynthesis ; Glucosides/isolation & purification ; Hydroponics/methods ; Isoflavones/biosynthesis ; Isoflavones/isolation & purification ; Organ Specificity ; Plant Leaves/growth & development ; Plant Leaves/metabolism ; Plant Roots/growth & development ; Plant Roots/metabolism ; Rhizosphere ; Glycine max/growth & development ; Glycine max/metabolism
    Chemical Substances Glucosides ; Isoflavones ; genistin (1POG3SCN5T) ; malonylgenistin (2AUB85VT2K) ; daidzin (4R2X91A5M5) ; 6''-O-malonyldaidzin (54CE6OWE7A) ; daidzein (6287WC5J2L) ; Genistein (DH2M523P0H)
    Language English
    Publishing date 2021-03-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1106450-x
    ISSN 1347-6947 ; 0916-8451
    ISSN (online) 1347-6947
    ISSN 0916-8451
    DOI 10.1093/bbb/zbab017
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4647: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (2.OG)
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  9. Article: Development of two-dimensional qualitative visualization method for isoflavones secreted from soybean roots using sheets with immobilized bovine serum albumin

    Onodera, Takeshi / Miyazaki, Haruna / Li, Xinzhu / Wang, Jin / Nakayasu, Masaru / Yatabe, Rui / Tahara, Yusuke / Hosoki, Ai / Sakurai, Nozomu / Sugiyama, Akifumi

    Biosensors & bioelectronics. 2022 Jan. 15, v. 196

    2022  

    Abstract: A visualization method for the qualitative evaluation of soybean isoflavones secreted from soybean roots by transferring them onto a sheet with immobilized bovine serum albumin (BSA) was developed. BSA was chemically bonded onto a glass microfiber filter. ...

    Abstract A visualization method for the qualitative evaluation of soybean isoflavones secreted from soybean roots by transferring them onto a sheet with immobilized bovine serum albumin (BSA) was developed. BSA was chemically bonded onto a glass microfiber filter. The fluorescence quenching resulting from the interaction of BSA with soybean isoflavones such as daidzein and daidzin was utilized. Fluorescence images before and after soybean roots were placed in contact with the sheets with immobilized BSA were taken with an electron-multiplying charge-coupled device camera. The fluorescence quenching in the images was visualized and analyzed. Soybean isoflavones were extracted from the sheets for quantitative analysis, and the correlation coefficient between the quenched fluorescence intensity per sheet and the total amount of soybean isoflavones was 0.78 (p < 0.01), indicating a high correlation. The quenched fluorescence intensity was lower in pumpkin roots, which do not secrete soybean isoflavone. It was found from analyzed images that soybean isoflavone is secreted in larger amounts from the basal region of the taproot and the tips of the lateral roots of soybean.
    Keywords biosensors ; bovine serum albumin ; cameras ; daidzein ; daidzin ; fluorescence ; glass ; pumpkins ; quantitative analysis ; soybeans ; tap roots
    Language English
    Dates of publication 2022-0115
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 1011023-9
    ISSN 1873-4235 ; 0956-5663
    ISSN (online) 1873-4235
    ISSN 0956-5663
    DOI 10.1016/j.bios.2021.113705
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    In stock of ZB MED Cologne/Königswinter

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  10. Article ; Online: Tomato root-associated

    Nakayasu, Masaru / Takamatsu, Kyoko / Kanai, Keiko / Masuda, Sachiko / Yamazaki, Shinichi / Aoki, Yuichi / Shibata, Arisa / Suda, Wataru / Shirasu, Ken / Yazaki, Kazufumi / Sugiyama, Akifumi

    mBio

    2023  Volume 14, Issue 5, Page(s) e0059923

    Abstract: Importance: Saponins are a group of plant specialized metabolites with various bioactive properties, both for human health and soil microorganisms. Our previous works demonstrated ... ...

    Abstract Importance: Saponins are a group of plant specialized metabolites with various bioactive properties, both for human health and soil microorganisms. Our previous works demonstrated that
    MeSH term(s) Humans ; Sapogenins/metabolism ; Solanum lycopersicum ; Steroids ; Saponins/metabolism ; Plants/metabolism
    Chemical Substances Sapogenins ; Steroids ; Saponins
    Language English
    Publishing date 2023-09-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2557172-2
    ISSN 2150-7511 ; 2161-2129
    ISSN (online) 2150-7511
    ISSN 2161-2129
    DOI 10.1128/mbio.00599-23
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