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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389030%3A_____%2F20%3A00522675" target="_blank" >RIV/61389030:_____/20:00522675 - isvavai.cz</a>

Result on the web

<a href="https://academic.oup.com/jxb/article/71/1/247/5556948" target="_blank" >https://academic.oup.com/jxb/article/71/1/247/5556948</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/jxb/erz399" target="_blank" >10.1093/jxb/erz399</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10611 - Plant sciences, botany

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

JOURNAL OF EXPERIMENTAL BOTANY

ISSN

1460-2431

e-ISSN

—

Volume of the periodical

71

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

247-257

UT code for WoS article

000524911100022

EID of the result in the Scopus database

2-s2.0-85076583298