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Ehsan Sepahi,Saeed Tarighi,Farajollah Shahriari Ahmadi,Abdolreza Bagheri 한국미생물학회 2015 The journal of microbiology Vol.53 No.2
Ferula (Ferula asafoetida L.) and Dorema (Dorema aucheri Bioss.) both from Apiaceae family were tested for their antiquorum sensing (QS) activity against Pseudomonas aeruginosa. Both essential oils exhibited anti-QS activity at 25 μg/ml of concenteration. At this concenteration Ferula fully abolished and Dorema reduced the violacein production by C. violaceum. Pyocyanin, pyoverdine, elastase and biofilm production were decreased in Ferula oil treatments. Dorema oil reduced pyoverdine and elastase production, while pyocyanin and biofilm production were not affacted. Expresion analysis of QS-dependent genes confirmed our phenotypic data. Our data introduced native Dorema and Ferula plants as novel QS and virulence inhibitors.
Sazegari Sima,Niazi Ali,Shahriari-Ahmadi Farajollah,Afsharifar Alireza 한국원예학회 2022 Horticulture, Environment, and Biotechnology Vol.63 No.5
Terpenoid indole alkaloids (TIA) are important pharmaceuticals produced in low amounts through the terpenoid indole alkaloid pathway in Catharanthus roseus. Production of these alkaloids is controlled by biosynthetic and regulatory genes. CrMYC1 is a chief transcription factor that regulates terpenoid indole alkaloid production. In this study, we cloned CrMYC1 and overexpressed it in C. roseus hairy roots to investigate its effect on the production of the TIAs ajmalicine and catharan- thine. qRT-PCR results revealed that CrMYC1 expression in transgenic CrMYC1-overexpressing hairy root lines was 3–6 times higher than that of the wild-type hairy root control line. Also, we detected a significant increase in strictosidine β-D- glucosidase (SGD) expression, a critical enzyme in TIA biosynthesis, in the overexpression lines. HPLC analysis showed that CrMYC1 overexpression significantly improved the accumulation of ajmalicine (13 to 14-fold) and catharanthine (3 to 4.4-fold) compared to the control hairy root line. These results provide insight into the role of this understudied transcription factor in TIA pathway regulation and emphasize further research objectives.