Cis- and trans-zeatin differentially modulate plant immunity

0426001 - ÚVGZ 2014 RIV US eng J - Journal Article
Grosskinsky, D. K. - Edelsbrunner, K. - Pfeifhofer, H. - van der Graaff, E. - Roitsch, Thomas
Cis- and trans-zeatin differentially modulate plant immunity.
Plant Signaling & Behavior. Roč. 8, č. 7 (2013), "e24798.1"-"e24798.4". ISSN 1559-2316. E-ISSN 1559-2324
Institutional support: RVO:67179843
Keywords : Pseudomonas syringae * cytokinin * phytohormone * plant defense * plant immunity * plant pathogen interaction * plant resistance * tobacco * zeatin
Subject RIV: ED - Physiology

Phytohormones are essential regulators of various processes in plant growth and development. Several phytohormones are also known to regulate plant responses to environmental stress and pathogens. Only recently, cytokinins have been demonstrated to play an important role in plant immunity. Increased levels of cytokinins such as trans-zeatin, which are considered highly active, induced resistance against mainly (hemi)biotrophic pathogens in different plant species. In contrast, cis-zeatin is commonly regarded as a cytokinin exhibiting low or no activity. Here we comparatively study the impact of both zeatin isomers on the infection of Nicotiana tabacum by the (hemi)biotrophic microbial pathogen Pseudomonas syringae. We demonstrate a biological effect of cis-zeatin and a differential effect of the two zeatin isomers on symptom development, defense responses and bacterial multiplication.
Permanent Link: http://hdl.handle.net/11104/0231780