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International Journal of Medicinal Mushrooms
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ISSN Druckformat: 1521-9437
ISSN Online: 1940-4344

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International Journal of Medicinal Mushrooms

DOI: 10.1615/IntJMedMushr.v11.i2.90
pages 199-205

Virus Resistance Induced by Glucuronoxylomannan Isolated from Submerged Cultivated Yeast-like Cell Biomass of Medicinal Yellow Brain Mushroom Tremella mesenterica Ritz.: Fr. (Heterobasidiomycetes) in Hypersensitive Host Plants

Oleksiy G. Kovalenko
D.K. Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03143 Kiev, Ukraine
Olena N. Polishchuk
D.K. Zabolotny Institute of Microbiology and Virology, National Academy of Sciences of Ukraine, 03143 Kiev, Ukraine
Solomon P. Wasser
N.G. Kholodny Institute of Botany, NAS of Ukraine, 2 Tereshchenkovskaya Str., Kiev 01004, Ukraine; International Center for Cryptogamic Plants and Fungi, Institute of Evolution, University of Haifa, Mount Carmel, Haifa, Israel


The ability of exopolysaccharides produced by medicinal mushroom Tremella mesenterica to influence the mechanisms of plant resistance to viruses has been studied. It was established that neutral polysaccharides (100−1000 μg/mL) can inhibit the formation of local lesions induced by the tobacco mosaic virus (TMV) (86%−96%) in Nicotiana tabacum and Datura stramonium plants. Acid water-soluble glucuronoxylomannan (GXM) in a concentration of 1000−2500 μg/mL activates the mechanisms of virus localization and also the acquired virus resistance (AVR) in plants supersensitive to TMV de novo. This is confirmed by the fact that actinomycin D (10−20 μg/mL), an inhibitor of DNA-dependent RNA-polymerase, partially inhibits the development of AVR. The possibility of using the natural product GXM as an instrument to study the mechanism of AVR as a method to decrease viral infection lesions in plants is under discussion.

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