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Arabidopsis KNOXI proteins activate cytokinin biosynthesis

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F05%3A00002282" target="_blank" >RIV/61989592:15310/05:00002282 - isvavai.cz</a>

  • Alternative codes found

    RIV/61389030:_____/05:00030698

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Arabidopsis KNOXI proteins activate cytokinin biosynthesis

  • Original language description

    Plant architecture is shaped through the continuous formation of organs by meristems [1]. Class I KNOTTED1-like homeobox (KNOXI) genes are expressed in the shoot apical meristem (SAM) and are required for SAM maintenance [2-6]. KNOXI proteins and cytokinin, a plant hormone intimately associated with the regulation of cell division [7, 8], share overlapping roles, such as meristem maintenance and repression of senescence [2, 9-11], but their mechanistic and hierarchical relationship have yet to be defined. Here, we show that activation of three different KNOXI proteins using an inducible system resulted in a rapid increase in mRNA levels of the cytokinin biosynthesis gene isopentenyl transferase 7 (AtlPT7) and in the activation of ARR5, a cytokinin response factor. We further demonstrate a rapid and dramatic increase in cytokinin levels following activation of the KNOXI protein SHOOT MERISTEMLESS (STM). Application of exogenous cytokinin or expression of a cytokinin biosynthesis gene th

  • Czech name

    Proteiny KNOXI z Arabidopsis aktivují biosyntézu cytokininů

  • Czech description

    Architektura rostlin je dána postupným formováním orgánů z meristémů. Významnou roli při formování vrcholového meristému stonku rostliny hrají homeoboxové geny KNOXI. Aktivace tří různých KNOXI proteinů vede k rychlému nárůstu hladiny mRNA isopentenyltransferasy 7 (AtIPT7), podílející se na biosyntéze cytokininů. Bylo prokázáno, že v důsledku aktivace AtIPT7 dojde k nárůstu hladin cytokininů a potažmo k aktivaci ARR5, cytokininového odezvového faktoru. Lze tedy shrnout, že tvorba vrcholového meristému stonku je regulována KNOXI proteiny prostřednictvím aktivace biosyntézy cytokininů.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CE - Biochemistry

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2005

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Current Biology

  • ISSN

    0960-9822

  • e-ISSN

  • Volume of the periodical

    15

  • Issue of the periodical within the volume

    17

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    6

  • Pages from-to

    1566-1571

  • UT code for WoS article

  • EID of the result in the Scopus database