1. Ohira K, Ojima K & Fujiwara A, Plant Cell Physiol, 14 (1973) 1113.
2. Raina SK, Sathish P & Sarma KS, Plant Cell Rep, 6 (1987) 43.
3. Murashige T & Skoog F, Physiol Plant, 15 (1962) 473.
4. Chu CC, Wang CC, Sun CS, Hsu C, Yin KC, Chu CY & Bi FY, Sci Sin, 18 (1975) 659.
5. Raina SK, Balachandran SM, Virmani SS & Zapata FJ, Int Rice Res News, 14 (1989) 4.