State Key Laboratory of Agricultural Microbiology;
College of Life Science and Technology;
Huazhong Agricultural University;
Wuhan 430070;
China;
Department of Plant;
Soil and Entomological Sciences and Program of Microbiology;
Molecular Biology and Biochemistry;
University of Idaho;
Moscow;
ID 83844;
USA;
cytokinin; ethylene; biosynthesis; LHK1; Lotus; japonicus; MAPK; cascade; root; nodule; symbiosis;