The effect of different hormone combinations on direct and indirect somatic embryogenesis in Agave americana

M Nazir, S Sadat, M Soltani Howyzeh - Iranian Journal of Plant …, 2019 - ijpp.saveh.iau.ir
M Nazir, S Sadat, M Soltani Howyzeh
Iranian Journal of Plant Physiology, 2019ijpp.saveh.iau.ir
Direct and indirect somatic embryogenesis in Agave Americana through basal parts of
micropropagated shoots were considered in this study. For micropropagation, 2 factors (BA
and NAA) were utilized in different concentrations. A factorial experiment based on a
completely randomized design (CRD) was accomplished with four replicates in a modified
Murashige and Skoog medium (MSB). BA in 3 mg/L along with NAA in 0.1 mg/L was the best
treatment for multiplication. Callus and embryo induction were evaluated using different …
Direct and indirect somatic embryogenesis in Agave Americana through basal parts of micropropagated shoots were considered in this study. For micropropagation, 2 factors (BA and NAA) were utilized in different concentrations. A factorial experiment based on a completely randomized design (CRD) was accomplished with four replicates in a modified Murashige and Skoog medium (MSB). BA in 3 mg/L along with NAA in 0.1 mg/L was the best treatment for multiplication. Callus and embryo induction were evaluated using different auxins in a CRD experiment with three replicates in MS medium supplemented with L2 vitamins. Picloram 2.5 and 2 mg/L and also Dicamba 1 mg/L induced 66.7%, 60%, and 53.3% of explants to somatic embryo, respectively. Also, 2,4-D 2 mg/L had the highest impact on callus induction (95.6%). Embryogenesis was studied using Dicamba and Picloram in the same culture medium in a factorial experiment based on CRD with three replicates. The results of orthogonal polynomial analaysisindicated that high concentrations of Dicamba from 0 to 1.5 mg/L had a significant effect on somatic embryo induction. However, higher concentrations had the opposite effect on somatic embryo numbers. Germination of somatic embryos was performed in MSB medium without growth regulators.
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