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5187 results about "Nicotiana tabacum" patented technology

Nicotiana tabacum, or cultivated tobacco, is an annually-grown herbaceous plant. It is found only in cultivation, where it is the most commonly grown of all plants in the genus Nicotiana, and its leaves are commercially grown in many countries to be processed into tobacco. It grows to heights between 1 and 2 meters. Research is ongoing into its ancestry among wild Nicotiana species, but it is believed to be a hybrid of Nicotiana sylvestris, Nicotiana tomentosiformis, and possibly Nicotiana otophora.

Oligochitosan and plant source substance-containing agricultural composition and applications

The invention relates to an oligochitosan and plant source substance-containing agricultural composition and applications, wherein the plant source substance is prepared by one or more of derris, tripterygium glycosides, tobacco, pyrethrum cinerariifolium, tagetes erecta, eupatorium adenophorum, radix stemonae, cayenne pepper, macleaya cordata, radix sophorae flavescentis, pyrethrum cinerariifolium, chinaberry, excoecaria sebifera, black nightshade herb, rhododendron sinensis sweet, coriaria sinica maxim, garlic, fruit of cubeb litsea tree, yellow flowered rhododendron, thymelaea, radix euphorbiae lantu, lysimachia foenum-graecum hance, peppermint, calamendiol, cortex cinnamomi, black pepper, artemisia scoparia, rhizoma alpiniae officinarum, mugwort, pepper, cynanchum komarovii, chinese honeylocust abnormal fruit, stramonium, ginko, camphora officinarum, caulis spatholobi, chinese mosla herb, herba asari, red sandalwood, erythrina indica, myrsine africana and fructus cnidii. The composition is low in people and livestock and non-target organism toxicity, fast degraded in the environment, low in residue, and free from environmental pollution. The oligochitosan and certain plant source substances in the composition are mixed and can achieve synergistic interaction, and the usage amount of the plant source substances can be reduced.
Owner:HAINAN ZHENGYE ZHONGNONG HIGH TECH

Compositions and methods for minimizing nornicotine synthesis in tobacco

Compositions and methods for reducing the level of nornicotine and N′-nitrosonornicotine (NNN) in tobacco plants and plant parts thereof are provided. The compositions comprise isolated polynucleotides and polypeptides for a root-specific nicotine demethylases, CYP82E10, and variants thereof, that are involved in the metabolic conversion of nicotine to nornicotine in these plants. Compositions of the invention also include tobacco plants, or plant parts thereof, comprising a mutation in a gene encoding a CYP82E10 nicotine demethylase, wherein the mutation results in reduced expression or function of the CYP82E10 nicotine demethylase. Seed of these tobacco plants, or progeny thereof, and tobacco products prepared from the tobacco plants of the invention, or from plant parts or progeny thereof, are also provided. Methods for reducing the level of nornicotine, or reducing the rate of conversion of nicotine to nornicotine, in a tobacco plant, or plant part thereof are also provided. The methods comprise introducing into the genome of a tobacco plant a mutation within at least one allele of each of at least three nicotine demethylase genes, wherein the mutation reduces expression of the nicotine demethylase gene, and wherein a first of these nicotine demethylase genes encodes a root-specific nicotine demethylase involved in the metabolic conversion of nicotine to nornicotine in a tobacco plant or a plant part thereof. The methods find use in the production of tobacco products that have reduced levels of nornicotine and its carcinogenic metabolite, NNN, and thus reduced carcinogenic potential for individuals consuming these tobacco products or exposed to secondary smoke derived from these products.
Owner:NORTH CAROLINA STATE UNIV
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