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Pagina 1 a partire dal 1696 risultati
Metabolism of [14C]nicotine in wild species of Nicotiana.
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Nicotine metabolism was studied in a number of wild species of the genus Nicotiana. It was shown that exogenous alkaloid, labeled with 14C on the methyl, as well as in each of the heterocycles individually, when introduced into the above-ground organs of these species during the period of their
Wild tobacco genomes reveal the evolution of nicotine biosynthesis.
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Nicotine, the signature alkaloid of Nicotiana species responsible for the addictive properties of human tobacco smoking, functions as a defensive neurotoxin against attacking herbivores. However, the evolution of the genetic features that contributed to the assembly of the nicotine biosynthetic
First Report of Branched Broomrape (Orobanche ramosa) on Oilseed Rape (Brassica napus), Wild Mustard (Sinapis arvensis), and Wild Vetch (Vicia spp.) in Northern Greece.
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Branched broomrape (Orobanche ramosa L.) is a chlorophyll-lacking, root parasitic plant that infects many crops and wild species (2). Plants are densely hairy with minute, glandular hairs, particularly on flowers and upper stems. Stems are erect, often branched just above the ground, and brown to
Induction of the sticky plant defense syndrome in wild tobacco.
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Many plants engage in protective mutualisms, offering resources such as extrafloral nectar and shelters to predatory arthropods in exchange for protection against herbivores. Recent work indicates that sticky plants catch small insects and provide this carrion to predators who defend the plants
Evolution of a novel and adaptive floral scent in wild tobacco.
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Many plants emit diverse floral scents that mediate plant-environment interactions and attain reproductive success. However, how plants evolve biosynthesis of novel and adaptive floral volatiles remains unclear. Here, we show that in the wild tobacco, Nicotiana attenuata, a dominant species-specific
Congenital deformities in swine induced by wild tree tobacco, Nicotiana glauca.
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Eighty-four of 147 piglets from 20 purebred Hampshire gilts that were bred to purebred Hampshire boars and then fed Nicotiana glauca during various periods of gestation were congenitally deformed. The deformities occurred in piglets from gilts on experiments in 3 separate years during which 4
Teratogenicity and toxicity of wild tree tobacco, Nicotiana glauca in sheep.
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Collections of Nicotiana glauca containing from 0.45-1.14 mg anabasine per gram dry weight of plant induced moderate - severe toxic signs in pregnant ewes and teratogenic effects in their offspring when the ewes were given single daily doses of the plant that provided from 1.66 - 3.42 mg anabasine
Flower-specific jasmonate signaling regulates constitutive floral defenses in wild tobacco.
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Optimal defense (OD) theory predicts that within a plant, tissues are defended in proportion to their fitness value and risk of predation. The fitness value of leaves varies greatly and leaves are protected by jasmonate (JA)-inducible defenses. Flowers are vehicles of Darwinian fitness in flowering
Abscisic acid negatively regulates elicitor-induced synthesis of capsidiol in wild tobacco.
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In the Solanaceae, biotic and abiotic elicitors induce de novo synthesis of sesquiterpenoid stress metabolites known as phytoalexins. Because plant hormones play critical roles in the induction of defense-responsive genes, we have explored the effect of abscisic acid (ABA) on the synthesis of
ZEITLUPE is required for shade avoidance in the wild tobacco Nicotiana attenuata.
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Being shaded is a common environmental stress for plants, especially for densely planted crops. Shade decreases red: far-red (R:FR) ratios that inactivate phytochrome B (PHYB) and subsequently release phytochrome interaction factors (PIFs). Shaded plants display elongated hypocotyls, internodes, and
Genetic resistance to Peronospora tabacina in Nicotiana langsdorffii, a South American wild tobacco.
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Several accessions of Nicotiana langsdorffii, a wild tobacco relative native to South America, express an incompatible interaction in response to infection by Peronospora tabacina, an oömycete that causes blue mold disease of tobacco (N. tabacum) and many other species of Nicotiana. In resistant
First Report of Wild tomato mosaic virus Infecting Tobacco (Nicotiana tabacum) in China.
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Wild tomato mosaic virus (WTMV), a potyvirus, has been reported in Laichau, Vietnam, infecting Solanum torvum (wild tomato) in 2008 (3), and Kanchanaburi, Thailand, infecting Capsicum spp. in 2013 (KF250353). In mid-May 2013, Nicotiana tabacum showing yellowing, mosaic, and/or ringspot symptoms were
Effects of AM colonization on "wild tobacco" plants grown in zinc-contaminated soil.
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This greenhouse study aimed to determine the effect of colonization by the arbuscular mycorrhizal (AM) fungus (Glomus intraradices Schenck & Smith) on the "wild" tobacco (Nicotiana rustica L. var. Azteca), under soil-zinc (Zn) conditions. Plants of N. rustica were grown in AM or non-AM inoculated
Sequence of the psbA gene from wild type and triazin-resistant Nicotiana plumbaginifolia.
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AFLP analysis of genetic polymorphism and evolutionary relationships among cultivated and wild Nicotiana species.
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Amplified fragment length polymorphism (AFLP) analysis was used to determine the degree of intra- and inter-specific genetic variation in the genus Nicotiana. Forty-six lines of cultivated tobacco (Nicotiana tabacum L.) and seven wild Nicotiana species, including N. sylvestris, N. tomentosiformis,
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