Working Document Series Open Access Influence of Auxin (2.4-D,NAA and TDZ) on callus induction from different explants of Hibiscus sabdariffa M. K. Mohammed · T. Remaz · F. A. A. Sayed · O. E. Sayeda The production of Hibiscus sabdariffa (Roselle) in Sudan has increased during the last few years mainly by increasing the area under production. The crop is sold in both domestic and foreign markets. It is also important as a natural color… RUF-39345 2018 CC BY 4.0 28 Jul 2021