How endogenous BR content
and altered perception
of BRs influence thermal tolerance is poorly understood.
BR-induced thermotolerance in tomato seedlings with altered BR homeostasis was examined by assessing the survival, ion leakage and lipid peroxidation of seedlings from a BR-deficient mutant (extreme dwarf dx), a partially BR-insensitive mutant curl3−abs allele (curl3 altered brassinolide sensitivity) and a line overexpressing the Dwarf, BR-biosynthesis gene (35SD)