Cold acclimation in bryophytes: low-temperature-induced freezing tolerance in Physcomitrella patens is associated with increases in expression levels of stress-related genes but not with increase in level of endogenous abscisic acid. - Minami,A..; Nagao,M..; Ikegami,K..; Koshiba,T..; Arakawa,K..; Fujikawa,S..; Takezawa,D.. (Planta, 2005)