Rapid phosphorylation of MAP kinase-like proteins in two species of Arctic kelps in response to temperature and UV radiation stress

► Presence of two MAPKs in two species of Arctic kelps has been shown. ► Activation of p38-like and JNK-like proteins occurs under temperature and UV stress. ► A p38-like protein of 40 kDa in L. solidungula and 42 kDa in S. latissima was detected. ► JNKs had 42 and 36 kDa in L. solidungula and 40 and 36 kDa in S. latissima. ► Differential MAPKs activation response occurs in these Arctic kelp species.