anatabine/nicotiana tabacum

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Antisense-mediated down-regulation of putrescine N-methyltransferase activity in transgenic Nicotiana tabacum L. can lead to elevated levels of anatabine at the expense of nicotine.

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Nicotiana tabacum L. produces a number of pyridine alkaloids, with nicotine representing the major component and anatabine comprising most of the remainder of the alkaloid fraction. An antisense approach was used here to down-regulate activity of the important enzyme putrescine N-methyltransferase

RNAi-mediated down-regulation of ornithine decarboxylase (ODC) leads to reduced nicotine and increased anatabine levels in transgenic Nicotiana tabacum L.

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In leaf and root tissues of Nicotiana tabacum L. (common tobacco), nicotine is by far the predominant pyridine alkaloid, with anatabine representing only a minor component of the total alkaloid fraction. The pyrrolidine ring of nicotine is derived from the diamine putrescine, which can be

Why does anatabine, but not nicotine, accumulate in jasmonate-elicited cultured tobacco BY-2 cells?

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Suspension-cultured cells of Nicotiana tabacum cv. Bright Yellow-2 (BY-2) grow rapidly in a highly homogenous population and still exhibit the general behavior of plant cells, and thus are often used as model systems in several areas of plant molecular and cellular biology, including secondary

Anatalline and other methyl jasmonate-inducible nicotine alkaloids from Nicotiana tabacum cv. By-2 cell cultures.

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Anatalline [2,4-di(3-pyridyl)piperidine] accumulation was shown to be induced by methyl jasmonate in Nicotiana tabacum cv. BY-2 cell cultures. Beside anatabine, anatalline represented the most abundant alkaloid, moreover, it was always present in two isomeric forms occurring always in similar

Effects of down-regulating ornithine decarboxylase upon putrescine-associated metabolism and growth in Nicotiana tabacum L.

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Transgenic plants of Nicotiana tabacum L. homozygous for an RNAi construct designed to silence ornithine decarboxylase (ODC) had significantly lower concentrations of nicotine and nornicotine, but significantly higher concentrations of anatabine, compared with vector-only controls. Silencing of ODC

Involvement of the leaf-specific multidrug and toxic compound extrusion (MATE) transporter Nt-JAT2 in vacuolar sequestration of nicotine in Nicotiana tabacum.

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Alkaloids play a key role in higher plant defense against pathogens and herbivores. Following its biosynthesis in root tissues, nicotine, the major alkaloid of Nicotiana species, is translocated via xylem transport toward the accumulation sites, leaf vacuoles. Our transcriptome analysis of methyl

Molecular genetics of alkaloid biosynthesis in Nicotiana tabacum.

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Alkaloids represent an extensive group of nitrogen-containing secondary metabolites that are widely distributed throughout the plant kingdom. The pyridine alkaloids of tobacco (Nicotiana tabacum L.) have been the subject of particularly intensive investigation, driven largely due to the widespread

Ethylene response factor NtERF91 positively regulates alkaloid accumulations in tobacco (Nicotiana tabacum L.).

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Tobacco alkaloid metabolism is regulated by various transcription factors (TFs). Here, we have characterized a non-NIC2 locus gene, Ethylene Response Factor 91 (ERF91), function in regulation of alkaloid accumulation in tobacco. NtERF91 was preferentially expressed in roots and induced by jasmonic

Chemical Responses of Nicotiana tabacum (Solanaceae) Induced by Vibrational Signals of a Generalist Herbivore.

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Plants are able to sense their environment and respond appropriately to different stimuli. Vibrational signals (VS) are one of the most widespread yet understudied ways of communication between organisms. Recent research into the perception of VS by plants showed that they are ecologically

Antisense-mediated reduction in ADC activity causes minor alterations in the alkaloid profile of cultured hairy roots and regenerated transgenic plants of Nicotiana tabacum.

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In species of the genus Nicotiana, as in most plants, the important polyamine precursor putrescine can be derived from the amino acids ornithine and/or arginine via the activity of ornithine decarboxylase (ODC) and/or arginine decarboxylase (ADC), respectively. Nicotiana species also utilize

Validation of a GC-FID method for rapid quantification of nicotine in fermented extracts prepared from Nicotiana tabacum fresh leaves and studies of nicotine metabolites.

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A new GC-FID method, which allows rapid and reliable quantitation of nicotine in tobacco leaf extracts, was developed and validated. To avoid nicotine adsorption on the column, an amine-deactivated capillary column was used. The method developed was applied to study the degradation of nicotine in a

Antiparasitic properties of leaf extracts derived from selected Nicotiana species and Nicotiana tabacum varieties.

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Within the traditional pharmacopeia, tobacco (Nicotiana spp.) is often cited as an efficient pesticide. This activity is generally attributed to nicotine, but tobacco plants contain other alkaloids that could potentially contribute to this effect. In this study, we tested methanolic extracts of N.

Alkaloid Changes in Tobacco Seeds during Germination.

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Nicotine, nornicotine, anabasine, and anatabine, normally found in growing and mature tobacco (Nicotiana tabacum L.) plants, were extracted and quantified from mature tobacco seeds and young tobacco seedlings. The rate of net alkaloid disappearance and accumulation in tobacco seedlings was related

Alkaloid chemophenetics and transcriptomics of the Nicotiana genus

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In this study, we determined the pyridine alkaloid content (nicotine, nornicotine, anabasine, anatabine, cotinine, and myosmine) of 58 species and 2 subspecies of the Nicotiana genus by ultra-high-performance liquid chromatography coupled with mass spectrometry. We observed clear correlation between

Tobacco NUP1 transports both tobacco alkaloids and vitamin B6.

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The purine permeases (PUPs) constitute a large plasma membrane-localized transporter family in plants that mediates the proton-coupled uptake of nucleotide bases and their derivatives, such as adenine, cytokinins, and caffeine. A Nicotiana tabacum (tobacco) PUP-family transporter, nicotine uptake

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