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Chemical investigation of the oleo-gum resin of Ferula assa-foetida L. from Yasuj region led to the identification of five sesquiterpene coumarins namely, conferone (1), badrakemin (2), feslol (3), isosamarcandin (4) and samarcandin (5). The compounds were characterised by detailed 1D ((1)H and (13)C) and 2D NMR (HMBC, HSQC and NOESY) experiments. Among these compounds, conferone (1) and isosamarcandin (4) are being newly reported in F. assa-foetida L.

A factorial experiment based on a completely randomized design with three replicates was conducted to evaluate effects of sixteen different mixtures of organic nitrogen sources and antibiotics which were supplemented to an Murashige and Skoog (MS) medium containing 4 mg L−1 2,4-Dichlorophenoxyacetic acid (2,4-D), 0.4 mg L−1 benzyl-aminopurine (BAP), 30 g L−1 sucrose, 8 g L−1 Agar-agar on fresh weight and dry weight (assessed after three days of drying at 70°C) of calli and in vitro callogenesis from scutellum of four indigenous Iranian Indica rice (Oryza sativa L.) cultivars, including ‘Hashemi’, ‘Gerdeh’, ‘Hasani’, and ‘Gharib’. It was found that proline at 2.8 g L−1 is the most effective source of organic nitrogen in enhancing growth, whereas asparagine at 0.75 g L−1 inhibited the calli growth. Hygromycin at 50 mg L−1, with slight differences between the cultivars, could effectively stunt the growth of untransformed calli. Mixture of cefotaxime (250 mg L−1) and vancomycin (250 mg L−1) did not have any s...

High performance liquid chromatography method was used to analyze six phenolic acids in 15 rice cultivars hull water extracts as representative cultivars collected according to the results of our previous study. Dinorado hull extract had the highest phenolic acid content among the treatments. None of the six phenolic acids were detected in Line-229 hull extract by HPLC, while, Dashti-sard had the highest p-hydroxy benzoic acid content. Phenolic contents had significant correlation with percent inhibition of root growth of barnyardgrass. Eleven of the tested cultivars were chosen and grown in hydroponics system to study their root exudates effects on growth traits of barnyardgrass seedlings, in a completely randomized design with four replications. Root exudates of Dinorado, Neda, Domsorkh and Dular showed the highest inhibitory activities of barnyardgrass growth parameters while; Line-229 root exudates had the highest stimulatory effects on growth traits of this plant. Rice root exudates obtained...