Table 3. Percentages of pro-embryogenic calluses observed after nine subcultures on Chée and Pool (1987) supplemented with 1) 4.52 µM of 2,4-D; 2) 2.89 µM TDZ and 3) 4.52 µM of 2,4-D and 2.89 µM TDZ.

Cultivars

Phytohormones
combinations

% of pro-embryogenic
calluses after nine subcultures

 ‘Muscat Raf-raf’

 2,4-D
 TDZ
 2,4-D+ TDZ

 30 ± 4.13 b
 56.6 ± 7.79 a
 76.6 ± 4.9 a

 ‘Kahli Kerkennah’

 2,4-D
 TDZ
 2,4-D+ TDZ

 13.3 ± 2.2 b
 83.3 ± 8.8 a
 96.6 ± 8.1  a

 ‘Asli’

 2,4-D
 TDZ
 2,4-D+ TDZ

 6.6 ± 1.25 b
 57 ± 8.1 a
 76 ± 6.8 a

 ‘Arich Dressé’

 2,4-D
 TDZ
 2,4-D+ TDZ

 23.3 ± 3.1 b
 36.6 ± 8.98 b
 63.3 ± 4 a

 ‘Arich Ahmar’

 2,4-D
 TDZ
 2,4-D+ TDZ

 13.3 ± 2.2 b
 20 ± 7.0 b
 53.3 ± 5.9 a

 ‘Kahli Sfax’

 2,4-D
 TDZ
 2,4-D+ TDZ

 23.3 ± 3.74 c
 43.3 ± 5.57 b
 100 ± 4.9 a

 ‘Turky’

 2,4-D
 TDZ
 2,4-D+ TDZ

 26.6 ± 5.13 b
 46.6 ± 9.4 b
 90 ± 3.1 a

 ‘Khamri Tozeur’

 2,4-D
 TDZ
 2,4-D+ TDZ

 24 ± 3.13 b
 49 ± 9.4 b
 90 ± 5.2 a