Počet záznamů: 1
Root-shoot communication in tomato plants: cytokinin as a signal molecule modulating leaf photosynthetic activity
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SYSNO ASEP 0522675 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Root-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 autorů 4 Zdroj.dok. Journal of Experimental Botany. - : Oxford University Press - ISSN 0022-0957
Roč. 71, č. 1 (2020), s. 247-257Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Solanum lycopersicum ; Cytokinin ; leaf development ; photosynthesis ; source–sink relationship ; tomato ; xylem Vědní obor RIV EF - Botanika Obor OECD Plant sciences, botany Způsob publikování Open access Institucionální podpora UEB-Q - RVO:61389030 UT WOS 000524911100022 EID SCOPUS 85076583298 DOI 10.1093/jxb/erz399 Anotace Photosynthetic 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. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2021 Elektronická adresa https://academic.oup.com/jxb/article/71/1/247/5556948
Počet záznamů: 1