Effect of the source of the plant part and plant growth regulators on the establishment and multiplication of vegetative branches of Rosmarinus officinalis L. in vitro

Abstract

This search was carried out in the plant tissue culture laboratory at the College of Agriculture at the University of Kerbala from 2021 to 2022. The study included the use of in vitro technology in the use of plant parts and different combinations in the emergence and multiplication of farms vegetative branches of rosemary, the study was carried out in two stages after performing the sterilization process: the first included the emergence of vegetative farms by planting the growing tops and side nodes on the MS nutrient medium with different concentrations (0 , 1, 2, 3 mg.L-1) BA, and the second stage was carried out by cultivating the growths resulting from the nodes grown in the previous stage on the (MS) media, that was prepared with various concentrations (0, 1, 2, 3 mg.L-1) BA and ( 0, 0.1, 0.2, 0.4mg.L-1) NAA, The results of the study showed the superiority of the apical, as it achieved a response rate of 57.5% compared to the lateral shoots, which recorded a response rate of 37.5%, and the con. of 1 mg.l-1 BA was superior and achieved a response rate of 80% comparison with the neutral treat that earn a response rate It reached 15%, and the results showed that the same concentration of benzyl adenine at a concentration of 2 mg.l-1 achieved of higher average in the number and length of branches (4.74 branches.plantlet-1, 4.12 cm), while the concentration achieved 3 mg .l- 1 of it had the higher rate of leaves number and the Fresh and Dry weight of the branches (15.24 leaves.plantlet-1, 2986 mg and 1823 mg), respectively, comparison with the neutral treat that achieved the lower average, and the concentration 0.2 mg.L-1 NAA exceeded in achieving The highest average number of branches, leaves, fresh &dry weight of branches was (4.16 branches.plantlet-1 and 14.21 leaves.plantlet-1, 2606 mg and 1594 mg) respectively, while the concentration exceeded 0.4 mg.L-1 NAA in achieving the highest rate The length of the branches reached 3.74 cm. All experiments were carried out using CRD (utterly randomized design). Keywords: explants type ; plant growth regulators ; micro propagation ; rosemary ; tissue culture