Effect of Different Concentrations of Kinetin and NAA on Micropropagation of Gardenia Jasminoides

Volume 13 , Issue 1 , January 2010 , Pages 103-120

Authors

¹ College of Agriculture, University of Duhok

The goal of this study was to use plant tissue culture technique in vegetative propagation of

Gardenia (Gardenia jasminoides) by using single nodes and shoot tips excised from soft cuttings and

treated with different concentrations of growth regulators.The results revealed that the use of different

disinfistants was highly effective in reducing cultures contamination. The use of mercuric chloride (0.1%,

HgCl2) for 10 minutes was very effective in preventing contamination and gave the highest survival

percentage (99%). During the culture of shoot tips at initiation stage, a nutrient medium contained (2

mgl-1 kinetin+ 0.6 mgl-1 NAA) gave the highest values of average number of shoots and leaves and growth

length (2.3 shoots/ explant, 2.4 leaves and 1.9 cm respectively).At vegetative multiplication stage, The

culture of shoot tips on a nutrient medium containing (3 mgl-1 kinetin) gave the highest values of

average number of shoots and leaves (2.9 shoots/ explant, 3.6 leaves respectively).As for growth length,

the results revealed that the highest value was achieved by MS medium supplemented by 2 mgl-1 kinetin +

0.1 mgl-1 NAA (3.3 cm). Regarding rooting process, MS medium supplemented by 4 mgl-1 NAA gave the

highest average number and length of roots (4.0 roots and 2.50 cm respectively).Also, the medium

supplemented by 8 mgl-1 IAA gave the highest number and length of roots (3.40 roots and 3.50 cm

respectively). Plantlets obtained were transferred to pots and acclimatized with 95 % success.

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