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- W3118534479 abstract "Agrobacterium tumefaciens mediated transformation is a major tool in plant biotechnology. Catharanthus roseus suspension cultures were inoculated with A. tumefaciens strain carrying β-glucuronidase (gus) gene in presence of either Co2+ or cobalt nanoparticles (CoNPs) at 2.5, 5, 7.5, and 10 mg/L. Co2+ at 2.5 mg/L as well as CoNPs at 2.5, 5, and 7.5 mg/L enhanced expression of gus gene in plant cells. The enhancing effects can be attributed to the observed increase in virulence B1 (virB1) gene expression and potential subsequent improvement in transformation efficiency through the inhibitory effect of cobalt on ethylene biosynthesis in plant cells. Ethylene is a major hindrance against transformation success through suppression of vir gene expression. The Agrobacterium friend role of cobalt was lost upon a further increase in cobalt concentration due to abusing defense genes working against both heavy metal-induced oxidative stress and Agrobacterium-associated biotic stress. Results reflected the better performance of CoNPs, compared with Co2+ in the enhancement of expression of gus gene that can be attributed to lower sensitivity of plant defense system, represented with an expression of genes encoding phenylalanine ammonia-lyase (PAL), peroxidase (POD) and one of the class 1 pathogenesis-related proteins (CrPR1a), to cobalt nano form than ionic form. Such enhancements may suggest a potential role for CoNPs in enhancing the production of therapeutically important compounds employing transient expression of foreign genes in addition to improving Agrobacterium-mediated transformation that needs further investigation. The 2,4-D (2,4- dichlorophenoxyacetic acid), 5-bromo-4-choloro-3-indolyl-βglucuronic acid (X-gluc), aminoethoxyvinylglycine (AVG), cobalt nanoparticles (CoNPs), deionized water (DW), glucuronidase (GUS), glucuronidase gene (gus), hygromycin phosphotransferase gene (hpt), indole acetic acid (IAA), malondialdehyde (MDA), Murashige, and Skoog (MS), negative control (NC), pathogenesis-related (PR), phenylalanine ammonia-lyase (PAL), phenylalanine ammonia-lyase (PAL), peroxidase (POD), peroxidase gene (POD), polyvinylpyrrolidone (PVP), positive control (PC), standard deviation (SD), transmission electron microscopy (TEM), virulence genes (vir), YEP (yeast extract peptone)" @default.
- W3118534479 created "2021-01-18" @default.
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- W3118534479 date "2020-01-01" @default.
- W3118534479 modified "2023-10-18" @default.
- W3118534479 title "Effects of cobalt ions and cobalt nanoparticles on transient expression of gus gene in catharanthus roseus suspension cultures" @default.
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- W3118534479 doi "https://doi.org/10.1080/16878507.2020.1847386" @default.
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