Počet záznamů: 1  

Root-shoot communication in tomato plants: cytokinin as a signal molecule modulating leaf photosynthetic activity

  1. 1.
    SYSNO ASEP0522675
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevRoot-shoot communication in tomato plants: cytokinin as a signal molecule modulating leaf photosynthetic activity
    Tvůrce(i) Glanz-Idan, N. (IL)
    Tarkowski, P. (CZ)
    Turečková, Veronika (UEB-Q) RID, ORCID
    Wolf, S. (DE)
    Celkový počet autorů4
    Zdroj.dok.Journal of Experimental Botany. - : Oxford University Press - ISSN 0022-0957
    Roč. 71, č. 1 (2020), s. 247-257
    Poč.str.11 s.
    Jazyk dok.eng - angličtina
    Země vyd.GB - Velká Británie
    Klíč. slovaSolanum lycopersicum ; Cytokinin ; leaf development ; photosynthesis ; source–sink relationship ; tomato ; xylem
    Vědní obor RIVEF - Botanika
    Obor OECDPlant sciences, botany
    Způsob publikováníOpen access
    Institucionální podporaUEB-Q - RVO:61389030
    UT WOS000524911100022
    EID SCOPUS85076583298
    DOI10.1093/jxb/erz399
    AnotacePhotosynthetic activity is affected by exogenous and endogenous inputs, including source-sink balance. Reducing the source to sink ratio by partial defoliation or heavy shading resulted in significant elevation of the photosynthetic rate in the remaining leaf of tomato plants within 3 d. The remaining leaf turned deep green, and its area increased by almost 3-fold within 7 d. Analyses of photosynthetic activity established up-regulation due to increased carbon fixation activity in the remaining leaf, rather than due to altered water balance. Moreover, senescence of the remaining leaf was significantly inhibited. As expected, carbohydrate concentration was lower in the remaining leaf than in the control leaves, however, expression of genes involved in sucrose export was significantly lower. These results suggest that the accumulated fixed carbohydrates were primarily devoted to increasing the size of the remaining leaf. Detailed analyses of the cytokinin content indicated that partial defoliation alters cytokinin biosynthesis in the roots, resulting in a higher concentration of trans-zeatin riboside, the major xylem-translocated molecule, and a higher concentration of total cytokinin in the remaining leaf. Together, our findings suggest that trans-zeatin riboside acts as a signal molecule that traffics from the root to the remaining leaf to alter gene expression and elevate photosynthetic activity.
    PracovištěÚstav experimentální botaniky
    KontaktDavid Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469
    Rok sběru2021
    Elektronická adresahttps://academic.oup.com/jxb/article/71/1/247/5556948
Počet záznamů: 1  

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