Identification of the Arabidopsis dry2/sqe1-5 mutant reveals a central role for sterols in drought tolerance and regulation of reactive oxygen species. by Posé, D, Castanedo, I, Borsani, O, Nieto, B, Rosado, A, Taconnat, L, Ferrer, A, Dolan, L, Valpuesta, V, Botella, M