Abscisic Acid-Cytokinin Antagonism Modulates Resistance Against Pseudomonas syringae in Tobacco

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F14%3A00453057" target="_blank" >RIV/86652079:_____/14:00453057 - isvavai.cz</a>

Result on the web

<a href="https://apsjournals.apsnet.org/doi/10.1094/PHYTO-03-14-0076-R" target="_blank" >https://apsjournals.apsnet.org/doi/10.1094/PHYTO-03-14-0076-R</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1094/PHYTO-03-14-0076-R" target="_blank" >10.1094/PHYTO-03-14-0076-R</a>

Result language

angličtina

Original language name

Abscisic Acid-Cytokinin Antagonism Modulates Resistance Against Pseudomonas syringae in Tobacco

Original language description

Phytohormones are known as essential regulators of plant defenses, with ethylene, jasmonic acid, and salicylic acid as the central immunity backbone, while other phytohormones have been demonstrated to interact with this. Only recently, a function of the classic phytohormone cytokinin in plant immunity has been described in Arabidopsis, rice, and tobacco. Although interactions of cytokinins with salicylic acid and auxin have been indicated, the complete network of cytokinin interactions with other immunity-relevant phytohormones is not yet understood. Therefore, we studied the interaction of kinetin and abscisic acid as a negative regulator of plant immunity to modulate resistance in tobacco against Pseudomonas syringae. By analyzing infection symptoms, pathogen proliferation, and accumulation of the phytoalexin scopoletin as a key mediator of kinetin-induced resistance in tobacco, antagonistic interaction of these phytohormones in plant immunity was identified. Kinetin reduced abscisic acid levels in tobacco, while increased abscisic acid levels by exogenous application or inhibition of abscisic acid catabolism by diniconazole neutralized kinetin-induced resistance. Based on these results, we conclude that reduction of abscisic acid levels by enhanced abscisic acid catabolism strongly contributes to cytokinin-mediated resistance effects. Thus, the identified cytokinin-abscisic acid antagonism is a novel regulatory mechanism in plant immunity.

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

2014

Confidentiality

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

Name of the periodical

Phytopathology

ISSN

0031-949X

e-ISSN

—

Volume of the periodical

104

Issue of the periodical within the volume

12

Country of publishing house

US - UNITED STATES

Number of pages

7

Pages from-to

1283-1288

UT code for WoS article

000345149900003

EID of the result in the Scopus database

2-s2.0-84910624499