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Rapid reorganization of microtubular cytoskeleton accompanies early changes in nuclear ploidy and chromatin structure in postmitotic cells of barly leaves infected with powdery mildew. Baluska, F.; Bacigalova, K; Oud, J.L.; Hauskrecht, M.; Kubica, S. Published in: Protoplasma DOI:10.1007/BF01272854 Link to publication Citation for published version (APA):Baluska, F., Bacigalova, K., Oud, J. L., Hauskrecht, M., & Kubica, S. (1995). Rapid reorganization of microtubular cytoskeleton accompanies early changes in nuclear ploidy and chromatin structure in postmitotic cells of barly leaves infected with powdery mildew. Protoplasma, 185, 140-151. DOI: 10.1007/BF01272854 General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Summary. Post-mitotic ePidermal cells of barley leaves were found to contain, in addition to cortical microtubules (CMTs), distinct arrays of endoplasmic microtubules (EMTs). These encircle nuclei and continuously merge into the CMT arrays that underly the plasmalemma. Detailed three-dimensional reconstruction of both types of MTs during fungal infection showed that profound and very rapid MT rearrangements occurred especially in the case of incompatible (resistant) barley-powdery mildew genotype combination. The most early MT responses, followed by their subsequent complete disintegration, were recorded around nuclei. These events might be relevant for the induction of such nuclear processes as onset of DNA synthesis and nuclear chromatin condensation. Observed pattern of early infection events, as well as less prominent responses in the case of compatible (susceptible) barley-powdery mildew genotype combination, both findings suggest that rapid reorganization of the MT cytoskeleton could be involved in recognition of the fungus by host cells and in the initiation of resistance responses in barley leaves. We hypothesize that the integrity and dynamics of the MT cytoskeleton, especially of its perinuclear part, might participate in control mechanisms involved in activation of resistance genes.

Ondejková N., Hudecová M., Bacigálová K. (2010): First report on Monilinia fructicola in the Slovak Republic. Plant Protect Sci., 46: 181-184.The occurrence of Monilinia on stone and pome fruit trees in Slovakia was studied. Commonly distributed species Monilinia laxa, M. fructigena, and American species M. fructicola were determined by the methods used. M. fructicola was identified on the fruits of peach and nectarine imported to our country and on domestic plum fruits as well. To our knowledge, this is the first report on M. fructicola in Slovakia and a new member for Slovak mycobiota.

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