As to root
formation, it is known that GA3 in tissue culture mimics an
inhibitor during rhizogenesis (Sutter, 1996; Yıldırım and
Turker, 2009), as seen in the present study, producing 1.8
root per explant with a frequency of 40% explant-forming
roots (compare root formation effects of PGR-free LS and
GA3 medium).