IAA (indole-3-acetic acid). First androgenic embryos were placed on B 5 medium without plant growth regulators and then on MS medium containing 0.2 mg·L -1 BAP and 1 mg·L -1 NAA (α-naphthaleneacetic acid). Androgenic embryos died on B 5 regeneration medium without plant growth regulators. On MS medium first shoots and callus with and without roots were obtained. Rosettes withered during following passages whereas callus tissue developed further. The quantity of DNA in this tissue equivalent to 4X chromosomes.