Cytokinins modulate auxin-induced organogenesis in plants via regulation of the auxin efflux

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F09%3A00039832" target="_blank" >RIV/00216224:14310/09:00039832 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/09:00039833

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Cytokinins modulate auxin-induced organogenesis in plants via regulation of the auxin efflux

Popis výsledku v původním jazyce

Cytokinins (CKs) and auxins were shown to be the principal regulators of plant organogenesis. However, the molecular mechanisms of the auxin/CKs interaction are still largely unknown. Here we show that auxin is able to induce organogenic response in hypocotyl explants, while CK modulates the auxin-induced organogenesis via regulation of intercellular auxin distribution. De novo organogenesis is accompanied with production of endogenous CKs and tissue-specific activation of CK signalling. CKs reduce auxin efflux from tobacco cells and regulate the expression of auxin efflux carriers from the PIN family. Finally, endogenous CKs are necessary to maintain proper auxin distribution and PINs expression in Arabidopsis roots. We propose a model, in which auxinacts as a trigger of the organogenic processes, whose output is modulated by the endogenously produced CKs via regulation of expression of auxin efflux carriers.

Název v anglickém jazyce

Cytokinins modulate auxin-induced organogenesis in plants via regulation of the auxin efflux

Popis výsledku anglicky

Cytokinins (CKs) and auxins were shown to be the principal regulators of plant organogenesis. However, the molecular mechanisms of the auxin/CKs interaction are still largely unknown. Here we show that auxin is able to induce organogenic response in hypocotyl explants, while CK modulates the auxin-induced organogenesis via regulation of intercellular auxin distribution. De novo organogenesis is accompanied with production of endogenous CKs and tissue-specific activation of CK signalling. CKs reduce auxin efflux from tobacco cells and regulate the expression of auxin efflux carriers from the PIN family. Finally, endogenous CKs are necessary to maintain proper auxin distribution and PINs expression in Arabidopsis roots. We propose a model, in which auxinacts as a trigger of the organogenic processes, whose output is modulated by the endogenously produced CKs via regulation of expression of auxin efflux carriers.

Druh

O - Ostatní výsledky

CEP obor

EB - Genetika a molekulární biologie

OECD FORD obor

—

Projekt

<a href="/cs/project/LC06034" target="_blank" >LC06034: Regulace morfogeneze rostlinných buněk a orgánů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2009

Kód důvěrnosti údajů

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