ergosterol/nicotiana

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Ergosterol treatment leads to the expression of a specific set of defence-related genes in tobacco.

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Ergosterol is the main sterol of most fungi. Production of reactive oxygen species after the treatment of tobacco and tomato cells by nano-molar concentrations of ergosterol was previously observed as well as the activation of some stress activated mitogen-activated protein kinases on alfalfa cells.

Ergosterol elicits oxidative burst in tobacco cells via phospholipase A2 and protein kinase C signal pathway.

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Ergosterol, a typical fungal sterol, induced in tobacco (Nicotiana tabacum L. cv. Xanthi) suspension cells the synthesis of reactive oxygen species and alkalization of the external medium that are dependent on the mobilization of calcium from internal stores. We used specific inhibitors to elucidate

Elucidation of signaling molecules involved in ergosterol perception in tobacco.

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Ergosterol, a principal compound of the fungal plasma membrane, is regarded as a pathogen-associated molecular pattern. In the present study, the role of salicylic acid (SA), jasmonic acid (JA) and spermine signaling pathways after ergosterol elicitation were evaluated. SA, JA and spermine

Ergosterol-induced sesquiterpenoid synthesis in tobacco cells.

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Plants have the ability to continuously respond to microbial signals in their environment. One of these stimuli is a steroid from fungal membranes, ergosterol, which does not occur in plants, but acts as a pathogen-associated molecular pattern molecule to trigger defence mechanisms. Here we

Cytosolic calcium rises and related events in ergosterol-treated Nicotiana cells.

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The typical fungal membrane component ergosterol was previously shown to trigger defence responses and protect plants against pathogens. Most of the elicitors mobilize the second messenger calcium, to trigger plant defences. We checked the involvement of calcium in response to ergosterol using

Multi-platform metabolomic analyses of ergosterol-induced dynamic changes in Nicotiana tabacum cells.

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Metabolomics is providing new dimensions into understanding the intracellular adaptive responses in plants to external stimuli. In this study, a multi-technology-metabolomic approach was used to investigate the effect of the fungal sterol, ergosterol, on the metabolome of cultured tobacco cells.

Host Pah1p phosphatidate phosphatase limits viral replication by regulating phospholipid synthesis.

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Replication of positive-strand RNA viruses [(+)RNA viruses] takes place in membrane-bound viral replication complexes (VRCs). Formation of VRCs requires virus-mediated manipulation of cellular lipid synthesis. Here, we report significantly enhanced brome mosaic virus (BMV) replication and much

Delta7-sterol-C5-desaturase: molecular characterization and functional expression of wild-type and mutant alleles.

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An Arabidopsis thaliana recessive monogenic mutant (ste1-1) presenting a deficiency of the delta7-sterol-C5(6)-desaturase step in the sterol pathway has been reported previously [12]. To further characterize ste1-1, Arabidopsis, Nicotiana tabacum and Homo sapiens cDNAs encoding

Molecular and enzymatic characterizations of novel bifunctional 3beta-hydroxysteroid dehydrogenases/C-4 decarboxylases from Arabidopsis thaliana.

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We have isolated two cDNAs from Arabidopsis thaliana encoding bifunctional 3beta-hydroxysteroid dehydrogenase/C-4 decarboxylases (3betaHSD/D) involved in sterol synthesis, termed At3betaHSD/D1 and At3betaHSD/D2. Transformation of the yeast ergosterol auxotroph erg26 mutant, which lacks 3betaHSD/D

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