Involved in endocytosis positive regulation. Acts in early endocytic membrane fusion and membrane trafficking of recycling endosomes (PubMed:18547399, PubMed:23342166). Confers salt tolerance (PubMed:23342166). GTP + H2O = GDP + H(+) + phosphate Homooligomer, and heterooligomer with EHD2. By salinity stress. The EH domain (1-93) is critical for vesicular localization. Early flowering in short-day growth conditions (PubMed:18547399). Slightly slower endocytosis with delayed internalization (PubMed:18547399, PubMed:23342166). Reduced Brefeldin A sensitivity (PubMed:23342166). Belongs to the TRAFAC class dynamin-like GTPase superfamily. Dynamin/Fzo/YdjA family. EHD subfamily.