Abstract Background Weather change in high-altitude areas subjects mature tobacco ( Nicotiana tabacum L.) to cold stress, which damages leaf yield and quality. A brupt diurnal temperature differences (the daily dropping more than 20 °C) along with rainfall tobacco-growing at an altitude above 2450 m, caused stress field-grown tobacco. Results After the flue-cured suffered field, surface color o...

Cysteine proteinases are involved in various physiological and developmental processes in plants. Two cDNAs from senescent and non-senescent tobacco leaves were isolated with degenerate primers designed from conserved regions of plant senescence-associated cysteine proteinases using rapid amplification of cDNA ends (RACE). Both sequences encode papain-like cysteine proteinases: the 833 bp fragm...

Tobacco products, including cigarettes, cigars, chewing tobacco, snuff, and loose pipe tobacco, contain the dried, processed leaves of the tobacco plant Nicotiana rustica or Nicotiana tabacum. All forms of tobacco contain nicotine, an extremely addictive drug that can act as both a central nervous system stimulant and depressant. In addition to nicotine, tobacco contains thousands of other chem...

Introduction An investigation of the chemical changes that take place in tobacco during curing is in progress at the Kentucky Agricultural Experiment Station. Attempts are being made to determine what the normal changes are and how they are influenced by such variables as temperature and relative humidity, which have been shown to influence the final quality of tobacco. A study of this type add...