High-frequency genetic transformation of Phalaenopsis amabilis orchid using tomato extract-enriched medium for the pre-culture of protocorms - Indrianto, A.; Purwantoro, A.; Martiwi, I. N. A.; Feroniasanti, Y. M. L.; Nadifah, F.; Mercuriana, I. S.; Dwiyani, R.; Iwakawa, H.; Yoshioka, Y.; Machida, Y.; Machida, C.