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139 results

  1. CORESTA Congress, Edinburgh, 2010, AP 01; TSRC, Tob. Sci. Res. Conf., 2010, 64, abstr. 45

    Nicotine is enantioselectively demethylated by cytochrome P450 enzyme CYP82E4

    University of Kentucky, Dept. of Plant & Soil Sciences, Lexington, KY, USA
    Nicotine and nornicotine are two of the dominant alkaloids found in tobacco (N. tabacum L.), and known precursors to 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and N'-nitrosonornicotine (NNN).  In tobacco nicotine is N-demethylated to...
  2. CORESTA Congress, Edinburgh, 2010, AP 02

    The effect of topping on yield, quality and TSNA accumulation in Burley tobacco

    University of Kentucky, Dept. of Plant & Soil Sciences, Lexington, KY, USA
    It is known that lower alkaloids result in lower TSNAs, and that untopped tobacco has lower alkaloids than topped tobacco. The objective of this study was to quantify the effect of not topping on TSNAs, other nitrogenous components, physical...
  3. CORESTA Congress, Edinburgh, 2010, AP 03

    Improvement on the trait of nicotine to nornicotine conversion for Chinese Burley hybrids and the effectiveness of quality increase and harm reduction

    SHI Hongzhi; LI Chao; YANG Xingyou; LIU Guoshun; ZHOU Kaixu; DI Huihui; ZHANG Dinggui
    Henan Agricultural University, National Tobacco Cultivate Physiology and Biochemistry Research Centre, Zhengzhou, China.
    The problem of nicotine to nornicotine conversion is severe in Burley production in Sichuan, which is a fast growing Burley producing area in China. The improvement on the trait of nicotine conversion for a series of Burley hybrids was conducted...
  4. CORESTA Congress, Edinburgh, 2010, AP 04

    Decrease in contents of TSNAs and NOx in smoke by reduced expression of nitrate transporter gene (NtNRT1)

    Japan Tobacco Inc., Leaf Tobacco Research Lab., Oyama, Tochigi, Japan.
    We previously reported (CORESTA 2004) that two members of a low-affinity nitrate transporter gene family NtNRT1 isolated from Nicotiana tabacum , NtNRT1.1 and NtNRT1.2, showed the highest expression in roots, and that overexpression of NtNRT1.1...
  5. CORESTA Congress, Edinburgh, 2010, AP 05

    Abundance of tomato spotted wilt thrips vectors on alternative plant hosts associated with the tobacco farmscape in Georgia, U.S.A

    Georgia Mountain Research and Education Center, Blairsville, GA, USA
    Certain species of insect pests called thrips (Family: Thripidae) are known to transmit, or vector, tomato spotted wilt (TSW), a serious virus of flue-cured tobacco produced in the USA. The weed species present in the tobacco farmscape were sampled...
  6. CORESTA Congress, Edinburgh, 2010, AP 07

    Isolation of protein from Spinacia oleracea against tobacco mosaic virus and research on the antiviral mechanism

    JIN Guanghui; YANG Jun; YIN Qisheng; SONG Jizhen; JIN Lifeng; XUE Chaoqun; LUO Chaopeng
    Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, Henan, China
    Tobacco mosaic virus (TMV) is a worldwide-occurring tobacco viral disease and usually results in big losses in tobacco production. How to inhibit TMV infection and replication has become a hotspot in the field of plant virus disease control....
  7. CORESTA Congress, Edinburgh, 2010, AP 09

    Establishment and application of multiple RT-PCR for detection of TMV, CMV and PVY in tobacco

    CHEN Dexin; YANG Jinguang; ZHANG Shuai; SHEN Lili; QIAN Yumei; WANG Changshuan; HUANG Jin; WANG Fenglong
    Chinese Academy of Agricultural Science, Key Lab. of Tobacco Pest Monitoring Controlling & Integrated Mgt, STMB, Tobacco Research Inst., Qingdao, China
    The sequences of tobacco mosaic virus (TMV), cucumber mosaic virus (CMV) and potato virus Y (PVY) in the GenBank database were aligned using DNAMAN 6.0 version software, and the primers were designed on the conserved regions. And the multiple RT-PCR...