Nitrogen (N) strongly affects plant growth and metabolism. Although ammonium toxicity has been reported, the effects of nitrogen on shikonin biosynthesis remain obscure. In this study, we tested four different concentrations NH4+ Arnebia euchroma hairy roots (AEHR) to clarify influence AEHR accumulation in them possible mechanisms. The results showed that compared with 0% treatment (only nitrat...

Alkannin/shikonin (±)-5, 8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthoquinone), also known as Shikalkin, is a racemic mixture of naturally occurring isohexenylnaphthazarin compounds. The (S) isomer is called as alkannin and (R) isomer is called as shikonin. Study was undertaken with an objective to develop a method for isolation of shikalkin from roots of Arnebia nobilis Reichb.f. b...

OBJECTIVES The aim of this study was to investigate wound healing effects of Arnebia densiflora (Nordm.) Ledeb. root extracts on rat palatal mucosa. METHODS A 10-mm full-thickness mucosal wounds were created on midline of rats' palate by using scalpel. In the experimental groups, a ten percent extract of A. densiflora roots was topically applied once a day as ointment on the wounds. After wou...

High-valued medicinal plants Achillea millefolium, Acorus calamus, Arnebia nobilis, Fumaria indica, Gymnema sylvestre, Origanum vulgare, Paeonia emodi, Peganum harmala, Psoralea corylifolia, Rauwolfia serpentina, and Vetiveria zizanioides were identified with the help of taxonomical markers and investigated for characterization and palynological studies. These parameters are used to analyze the...