Martin Hönig

Palacký University Olomouc · Centre of the Region Haná for Biotechnological and Agricultural Research

Hormone perception and signaling pathways play a fundamental regulatory function in the physiological processes of plants. Cytokinins, plant hormones, regulate cell division and meristem maintenance. The cytokinin signaling pathway is well-established in model plant Arabidopsis. Several negative feedback mechanisms, tightly controlling the cytokini...

Plants can acquire an improved resistance against pathogen attacks by exogenous application of natural or artificial compounds. In a process called chemical priming, application of these compounds causes earlier, faster and/or stronger responses to pathogen attacks. The primed defense may persist over a stress-free time (lag phase) and may be expre...

The chronic exposure of skin to ultraviolet (UV) radiation causes adverse dermal reactions, such as erythema, sunburn, photoaging, and cancer, by altering several signalling pathways associated with oxidative stress, inflammation, and DNA damage. One of the possible UV light protection strategies is the use of dermal photoprotective preparations. T...

Phytohormones (plant hormones) are a group of small signalling molecules that act as important endogenous regulators in plant development and stress responses. Previous research has identified the phytohormone species, jasmonates, auxins and abscisic acid, and their related compounds in stressed leaf extracts. However, in situ visualisations of end...

Cytokinins modulate a number of important developmental processes, including the last phase of leaf development, known as senescence, which is associated with chlorophyll breakdown, photosynthetic apparatus disintegration and oxidative damage. There is ample evidence that cytokinins can slow down all these senescence-accompanying changes. Here, we...

Isoprenoid cytokinins play a number of crucial roles in the regulation of plant growth and development. To study cytokinin receptor properties in plants, we designed and prepared fluorescent derivatives of 6-[(3-methylbut-2-en-1-yl)amino]purine (N6-isopentenyladenine, iP) with several fluorescent labels attached to the C2 or N9 atom of the purine m...

Eleven 6-furfurylaminopurine (kinetin, Kin) derivatives were synthesized to obtain biologically active compounds. The prepared compounds were characterized using1H NMR, mass spectrometry combined with HPLC purity determination and elemental C, H, N analyses. The biological activity of new derivatives was tested on plant cells and tissues in cytokin...