Effects of heat treatment on metabolism of tobacco plants infected with Potato virus Y

0549630 - ÚEB 2022 RIV DE eng J - Journal Article
Hýsková, V. - Bělonožníková, K. - Doričová, V. - Kavan, D. - Gillarová, S. - Henke, S. - Synková, Helena - Ryšlavá, H. - Čeřovská, Noemi
Effects of heat treatment on metabolism of tobacco plants infected with Potato virus Y.
Plant Biology. Roč. 23, č. 1 (2021), s. 131-141. ISSN 1435-8603. E-ISSN 1438-8677
R&D Projects: GA MŠMT(CZ) EF16_019/0000738
Institutional support: RVO:61389030
Keywords : glycosidases * Hatch–Slack cycle * heat shock * Hsp70 * Hsp90 * phenolic acids * Potato virus Y
OECD category: Biochemical research methods
Impact factor: 3.877, year: 2021
Method of publishing: Open access
http://doi.org/10.1111/plb.13234

Many factors affect successful virus propagation and plant defence responses. Heat shock protein (Hsp) expression after heat shock plays an ambiguous role in viral infection. On the one hand, Hsp70 participates in plant defence response, on the other hand, Hsp70 could interact with viral proteins and facilitate virus propagation. Here, we studied metabolic adaptations of Nicotiana tabacum L. subjected to heat shock (42 °C, 2 h) before or after inoculating the plants with Potato virus Y (potyvirus). RT-qPCR and ELISA were used for potyvirus quantification. Hsp70 and Hsp90 isoforms were analysed by Western blotting. Salicylic, quinic and chlorogenic acid content was determined by LC-MS. The activity of Hatch–Slack enzymes (as markers of potyviral infection in tobacco) and glycosidases was assayed. Application of heat shock before or after inoculation showed accelerated potyviral propagation in comparison with only inoculated plants. Plants exposed to heat shock and concurrently inoculated showed higher potyviral content, higher amount of Hsp70, together with late decline of quinic acid content and low chlorogenic acid content. Spread of potyviral infection correlated with enhanced salicylic acid content and activities of enzymes of the Hatch–Slack cycle, α- and β-galactosidase, α-mannosidase, α-glucosidase and β-N-acetylhexosaminidase. Heat shock proteins accelerate potyviral propagation. The lower weight cytosolic and mitochondrial Hsp70 (~50-75 kDa) persist throughout the viral infection. Also, the plant defense response results in increase of salicylic and chlorogenic acids but decrease of quinic acid content.
Permanent Link: http://hdl.handle.net/11104/0325588