Abstract
Lepidium ostleri S.L. Welsh & Goodrich (Ostler’s peppergrass) is an endemic plant species restricted to Ordovician limestone outcrops associated with the San Francisco Mountain Range in western Utah. Due to restricted population distribution and proximity to modern mining operations, L. ostleri is a species of conservation interest. This study focused on the development of a micropropagation protocol for propagating mature plants using plant tissue culture methods. Indirect shoot organogenesis was obtained from L. ostleri explants on Murashige and Skoog (MS) medium augmented with various concentrations of BAP (6-Benzylaminopurine), kinetin (N6-furfuryladenine), and IAA (indole-3-acetic acid). Plantlets supporting shoots grown in vitro were pulse treated with differing strengths of indole-3-butyric acid (IBA) and transferred to sterile soil. Following root induction, plantlets were acclimated to ambient conditions. The successful development of a micropropagation protocol supports management activities for L. ostleri and also contributes to in vitro propagation knowledge at the species, genus, and family levels.
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