Abstract
ABSTRACT A procedure for producing somatic embryos enriched with dibenzyl trisulfide (DTS) using a hormone-dependent culture system is reported for Petiveria alliacea L. (Guinea hen weed). Leaf explants were cultured on a Murashige and Skoog medium supplemented with a range of naphthaleneacetic acid (NAA) concentrations and a fixed concentration of benzyladenine (BAP) at 11.0 μM and sucrose or glucose at 30 g l−1. Leaf explants cultured on all media types started to form callus at the cut surfaces of the discs 10–14 d after initiation. The type of sugar used influenced average fresh weight, the propensity to form roots, as well as the embryogenic response. The highest mean fresh weight (337.7±26.18 mg) and mean root number (23.7±1.69) was produced on media enriched with sucrose and supplemented with 53.7 μM NAA and 11.0 μM BAP. An ethanol extract of rhizogenic/embryogenic callus or somatic embryos was subjected to high-performance liquid chromatography analysis, which revealed the presence of DTS in both ...
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