Počet záznamů: 1

Distribution, biological activities, metabolism, and the conceivable function of cis-zeatin-type cytokinins in plants

  1. 1.
    0365271 - UEB-Q 2012 RIV GB eng J - Článek v odborném periodiku
    Gajdošová, Silvia - Spíchal, Lukáš - Kamínek, Miroslav - Hoyerová, Klára - Novák, Ondřej - Dobrev, Petre - Galuszka, Petr - Klíma, Petr - Gaudinová, Alena - Žižková, Eva - Hanuš, Jan - Dančák, M. - Trávníček, B. - Pešek, Bedřich - Krupička, M. - Vaňková, Radomíra - Strnad, Miroslav - Motyka, Václav
    Distribution, biological activities, metabolism, and the conceivable function of cis-zeatin-type cytokinins in plants.
    Journal of Experimental Botany. Roč. 62, č. 8 (2011), s. 2827-2840 ISSN 0022-0957
    Grant CEP: GA MŠk(CZ) LC06034; GA AV ČR IAA600380701; GA AV ČR IAA600380805; GA ČR GA301/08/1649; GA ČR(CZ) GAP506/11/0774
    Výzkumný záměr: CEZ:AV0Z50380511
    Klíčová slova: Arabidopsis thaliana * cis-zeatin * cytokinin oxidase
    Kód oboru RIV: ED - Fyziologie
    Impakt faktor: 5.364, rok: 2011

    The comprehensive screen through the land plants is presented suggesting that cytokinins (CKs) of cis-zeatin (cisZ)-type occur generally in plant kingdom. Changing levels of trans-zeatin (transZ) and cisZ during the Arabidopsis ontogeny shows that levels of the two Z isomers can significantly differ during the plant lifespan with cisZ CKs prevalence in developmental stages associated with limited growth. cisZ and transZ have different metabolic fate in oat and tobacco and cisZ is a preferred substrate of some Arabidopsis cytokinin oxidase/dehydrogenase (CKX) isoforms. Any cis-trans isomerization wasn’t observed. Survey of employed bioassays illustrates ability of high doses of cisZ-type CKs to induce various physiological responses and CK signaling. These data argue against the image of cisZ-type CKs as the non-active or weakly active natural adjuncts to the trans isomers suggesting their conceivable function as delicate regulators of CK responses in growth-limiting conditions.
    Trvalý link: http://hdl.handle.net/11104/0200554
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