@Article{IPB-1043, author = {Clarke, S.M. and Cristescu, S.M. and Miersch, O. and Harren, F.J.M. and Wasternack, C. and Mur, L.A.J.}, title = {{Jasmonates act with salicylic acid to confer basal thermotolerance in \textit{Arabidopsis thaliana}}}, year = {2009}, pages = {175-187}, journal = {New Phytol}, doi = {10.1111/j.1469-8137.2008.02735.x}, url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2008.02735.x/abstract}, volume = {182}, abstract = {The cpr5-1 Arabidopsis thaliana mutant exhibits constitutive activation of salicylic acid (SA), jasmonic acid (JA) and ethylene (ET) signalling pathways and displays enhanced tolerance of heat stress (HS). cpr5-1 crossed with jar1-1 (a JA-amino acid synthetase) was compromised in basal thermotolerance, as were the mutants opr3 (mutated in OPDA reductase3) and coi1-1 (affected in an E3 ubiquitin ligase F-box; a key JA-signalling component). In addition, heating wild-type Arabidopsis led to the accumulation of a range of jasmonates: JA, 12-oxophytodienoic acid (OPDA) and a JA-isoleucine (JA-Ile) conjugate. Exogenous application of methyl jasmonate protected wild-type Arabidopsis from HS. Ethylene was rapidly produced during HS, with levels being modulated by both JA and SA. By contrast, the ethylene mutant ein2-1 conferred greater thermotolerance. These data suggest that JA acts with SA, conferring basal thermotolerance while ET may act to promote cell death.} }