Indirect organogenesis of Aceh patchouli leaf explants (Pogostemon cablin Benth) by in vitro

Abstract

The Aceh patchouli plant (Pogostemon cablin. Benth) is a plantation plant that produces essential oils with great potential, known as patchouli oil. The use of in vitro culture techniques on patchouli plants needs to be developed to meet the needs of patchouli seeds. This study aimed to analyze the effect of plant growth regulators (PGRs) cytokinins 6-Benzyl Amino Purine (BAP) and Thidiazuron (TDZ) and auxin 1-Naphthaleneacetic Acid (NAA) on the organogenesis ability of Aceh patchouli leaf explants var. Lhokseumawe. The treatments analyzed were P1 = MS; P2 = BAP 0.75 mg.l−1, P3 = BAP 1.0 mg.l−1, P4 = TDZ 0.75 mg.l−1, P5 = TDZ 1.0 mg.l−1, P6 = NAA 0.5 mg.l−1, P7 = NAA 1.0 mg.l−1, P8 = BAP 0.75 mg.l−1 + NAA 0.5 mg.l−1, P9 = BAP 0.75 mg.l−1 + NAA 1.0 mg.l−1, P10 = BAP 1.0 mg.l−1 + NAA 0.5 mg.l−1, P11 = BAP 1.0 mg.l−1 + NAA 1.0 mg.l−1, P12 = TDZ 0.75 mg.l−1 + NAA 0.5 mg.l−1, P13 = TDZ 0.75 mg.l−1 + NAA 1.0 mg. l−1, P14 = TDZ 1.0 mg.l−1 + NAA 0.5 mg.l−1, P15 = TDZ 1.0 mg.l−1 + NAA 1.0 mg.l-1. The percentage of callus induction observed, percentage of shoot induction, percentage of browning, percentage of contamination and percentage of live explants at 28 DAI. The results showed that the percentage of explants forming callus was 56.4%, and the percentage of explants forming organ was 54.6%. In these two parameters the treatment of P14 and P15 gave the best results of 6.6% respectively. The percentage of explants experiencing browning was 26.1%, treatment P1 gave the highest response for this parameter, namely 6.6%. The parameter percentage of live explants was 71.3%. The best response was found in treatment P2, P3, P12 and P15, which were 6.6% each. The fastest bud formation occurred at 14 Days After Initiation (DAI) in P4 treatment. The resulting shoots look quite vigor and have formed leaves. In the combination treatment P14, showed the best results, the addition of auxin was able to increase the initiation of embryogenic callus.