Effect of salicylic acid on the development of induced Thermotolerance and induction of heat shock protein synthesis in the Arabidopsis thaliana cell culture

• Published in: Russian journal of plant physiology Vol. 56; no. 1; pp. 68 - 73
• Main Authors: Pavlova, E. L, Rikhvanov, E. G, Tauson, E. L, Varakina, N. N, Gamburg, K. Z, Rusaleva, T. M, Borovskii, G. B, Voinikov, V. K
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : SP MAIK Nauka/Interperiodica 2009; SP MAIK Nauka/Interperiodica
• Subjects: Arabidopsis thaliana; Biomedical and Life Sciences; Cell culture; Electron transport; Gene expression; Heat shock proteins; HSP; induced thermotolerance; Life Sciences; Mitochondria; Plant Physiology; Plant Sciences; Research Papers; Salicylic acid; Stress; Temperature effects; Arabidopsis thaliana; salicylic acid; induced thermotolerance; HSP; mitochondria
• ISSN: 1021-4437; 1608-3407
• DOI: 10.1134/S1021443709010105

Salicylic acid (SA) could be involved in the development of tolerance to abiotic stresses, to heat shock in particular. Under normal conditions (26°C), treatment with SA improved the tolerance of heterotrophic Arabidopsis thaliana (L.) Heynh culture to severe heat shock (50°C). Under mild heat shock (37°C) inducing the development of thermotolerance, the presence of SA, in contrast, reduced the capability of arabidopsis cells to tolerate high temperature (50°C) and simultaneously suppressed induction of HSP synthesis (Hsp101 and Hsp17.6) important for the development of induced thermotolerance. Since SA suppressed cell respiration and activated the alternative pathway of electron transport, SA is supposed, by modulating mitochondria functions, to be an endogenous regulator of plant stress gene expression.