Multifaceted activity of cytokinin in leaf development shapes its size and structure in Arabidopsis

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F19%3A43915546" target="_blank" >RIV/62156489:43210/19:43915546 - isvavai.cz</a>

Alternative codes found

RIV/68081707:_____/19:00504121 RIV/61389030:_____/19:00504121 RIV/61989592:15310/19:73598571 RIV/00216224:14740/19:00109276

Result on the web

<a href="https://doi.org/10.1111/tpj.14261" target="_blank" >https://doi.org/10.1111/tpj.14261</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/tpj.14285" target="_blank" >10.1111/tpj.14285</a>

Result language

angličtina

Original language name

Multifaceted activity of cytokinin in leaf development shapes its size and structure in Arabidopsis

Original language description

The phytohormone cytokinin has been shown to affect many aspects of plant development ranging from the regulation of the shoot apical meristem to leaf senescence. However, some studies have reported contradictory effects of cytokinin on leaf physiology. Therefore cytokinin treatments cause both chlorosis and increased greening and both lead to decrease or increase in cell size. To elucidate this multifaceted role of cytokinin in leaf development, we have employed a system of temporal controls over the cytokinin pool and investigated the consequences of modulated cytokinin levels in the third leaf of Arabidopsis. We show that, at the cell proliferation phase, cytokinin is needed to maintain cell proliferation by blocking the transition to cell expansion and the onset of photosynthesis. Transcriptome profiling revealed regulation by cytokinin of a gene suite previously shown to affect cell proliferation and expansion and thereby a molecular mechanism by which cytokinin modulates a molecular network underlying the cellular responses. During the cell expansion phase, cytokinin stimulates cell expansion and differentiation. Consequently, a cytokinin excess at the cell expansion phase results in an increased leaf and rosette size fueled by higher cell expansion rate, yielding higher shoot biomass. Proteome profiling revealed the stimulation of primary metabolism by cytokinin, in line with an increased sugar content that is expected to increase turgor pressure, representing the driving force of cell expansion. Therefore, the developmental timing of cytokinin content fluctuations, together with a tight control of primary metabolism, is a key factor mediating transitions from cell proliferation to cell expansion in leaves.

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

—

OECD FORD branch

10611 - Plant sciences, botany

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

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

Name of the periodical

Plant Journal

ISSN

0960-7412

e-ISSN

—

Volume of the periodical

97

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

20

Pages from-to

805-824

UT code for WoS article

000462684900002

EID of the result in the Scopus database

2-s2.0-85062641549