The best elongated ex vitro 4-month-old shoots derived from node cuttings under LED in previous treatment were sterilized and cut into nodes before cultured on SH medium supplemented with 1.0 mg l-1 TDZ, 0.3 mg l-1 NAA with different substrates including cotton, filter papers, gelrite or agar (Fig. 1e1, e2). All explants were placed under fluorescent lights.