scholarly journals Carotenoid-Related Volatile Compounds of Tobacco (Nicotiana tabacum L.) Essential Oils

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3446 ◽  
Author(s):  
Venelina Popova ◽  
Tanya Ivanova ◽  
Tsvetko Prokopov ◽  
Milena Nikolova ◽  
Albena Stoyanova ◽  
...  
Keyword(s):  
Nicotiana Tabacum ◽  
Essential Oils ◽  
Degradation Products ◽  
Chemical Components ◽  
Total Carotenoids ◽  
Process Duration ◽  
Nicotiana Tabacum L ◽  
Insight Into ◽  
Β Carotene ◽  
Carotenoid Degradation

Tobacco (Nicotiana tabacum L.) aroma is an important attribute of tobacco quality and is influenced by a variety of minor chemical components, including carotenoid degradation products. The objectives of this work were to determine the content of the most important fragrance-shaping carotenoid degradation products in the essential oils (EOs) of the three types of Bulgarian tobacco—Oriental (OR), flue-cured Virginia (FCV), and Burley (BU)—and to compare them with other aromatic products from tobacco. The content of total carotenoids and β-carotene was highest in BU tobacco (22.23 and 20.34 mg/100 g DW, respectively), followed by OR (13.60 and 12.09 mg/100 g DW in variety “Plovdiv 7” (Pd7); 6.27 and 5.45 mg/100 g DW in “Krumovgrad” (Kr), and FCV (5.93 and 3.73 mg/100 g DW). EOs were obtained by hydrodistillation in an acidified medium, and the main aroma-impact compounds from carotenoid degradation (identified by GC-MS) were as follows: FCV-α-ionone (0.61 mg/100 g DW), dihydro-β-ionone (0.96 mg/100 g DW), β-damascenone (1.26 mg/100 g DW); BU-α-ionone (0.73 mg/100 g DW), dihydro-β-ionone (1.19 mg/100 g DW), β-damascenone (1.35 mg/100 g DW); OR(Kr)-α-ionone (0.20 mg/100 g DW), β-ionone (1.08 mg/100 g DW), dihydro-β-ionone (1.34 mg/100 g DW), β-damascenone (0.36 mg/100 g DW); OR(Pd7)-α-ionone (1.43 mg/100 g DW), dihydro-β-ionone (1.73 mg/100 g DW), β-damascenone (1.23 mg/100 g DW). Ionone and its derivatives were not identified in the aroma extraction products concrete, resinoid, or absolute. The results suggest that temperature, pH of the medium, process duration, and possibly other unknown factors affect carotenoid transformation. The study provides insight into the composition of tobacco EOs and may be of interest to the fragrance industry.

CHANGES IN LEAF PIGMENTS DURING SENESCENCE AND CURING OF FLUE-CURED TOBACCO

1984 ◽  
Vol 64 (1) ◽  
pp. 229-232 ◽  
Author(s):  
WILLIAM A. COURT ◽  
JOHN G. HENDEL
Keyword(s):  
Nicotiana Tabacum ◽  
Plant Growth ◽  
Chlorophyll A ◽  
Chlorophyll B ◽  
Nicotiana Tabacum L ◽  
Pigment Concentrations ◽  
Oxygen Substitution ◽  
Β Carotene ◽  
Carotenoid Degradation

Neoxanthin, violaxanthin, lutein, β-carotene, chlorophyll a and chlorophyll b in the leaves of flue-cured tobacco (Nicotiana tabacum L.) were determined in samples collected at intervals from the middle of July through harvest. Harvested leaves were also sampled at intervals during flue curing for pigment determinations. Except where interrupted by rainfall or irrigation, pigment concentrations progressively declined during plant growth; this degradation was accelerated during flue curing. Carotenoid degradation during flue curing was proportional to the degree of oxygen substitution of the carotenoid. Chlorophyll a and chlorophyll b in cured tissue were typically less than 1% of the amounts present at harvest.Key words: Carotenoids, chlorophyll, tobacco (flue-cured), flue curing, senescence

Anticytokinin Activity of N-Phenyl-and N-Pyridylcarbamates

1990 ◽  
Vol 45 (1-2) ◽  
pp. 89-95 ◽  
Author(s):  
Ryo Shimizu ◽  
Hajime Iwamura ◽  
Toshio Fujita
Keyword(s):  
Nicotiana Tabacum ◽  
New Class ◽  
Nicotiana Tabacum L ◽  
Insight Into

A new class of non-adenylate anticytokinins, alkyl and phenyl N-phenylcarbamates and related phenyl N-pyridylcarbamates, has been developed. They have a structure that has an immediate resemblance to the non-adenylate class of cytokinins, N ,N′-diphenylureas, and N-pyridyl-N′-phenylureas, and the design of the molecule was made based on insight into the bioisoteric nature between the previous, non-adenylate s-triazine anticytokinins and the carbamate and urea structures. The activity in terms of the I50 value of the most potent members, 4-fluoro- and 4-chlorophenyl N-(2-chloro-4-pyridyl)carbamates, was 0.3 - 0.5 x 10-6 M when examined by the tobacco (Nicotiana tabacum L.) callus assay in the presence of 0.05 x 10-6 M kinetin.

INHERITANCE OF A SHORT-INTERNODE TRAIT IN TOBACCO

1982 ◽  
Vol 24 (6) ◽  
pp. 653-659
Author(s):  
Paul D. Legg ◽  
G. B. Collins
Keyword(s):  
Nicotiana Tabacum ◽  
Plant Height ◽  
Mutant Line ◽  
Chemical Components ◽  
Maternal Parent ◽  
Short Internode ◽  
Burley Tobacco ◽  
Nicotiana Tabacum L

A short-internode mutation in burley tobacco (Nicotiana tabacum L.) was inherited as a monogenic trait. Heterozygous plants varied in phenotype from comparable to the short-internode mutant to intermediate between mutant and normal plants. In generations following crosses between the mutant line and three burley cultivars, the degree of expression of dominance varied by years, maternal parent, cultivar background, and percentage of germplasm from the mutant parent. The short-internode line was reduced in plant height and had narrower leaves than the three cultivars. Also, the mutant line had more leaves than two of the three cultivars and was comparable to the cultivars in yield and several chemical components. Short-internode cultivars could be developed for use in present production or in mechanized handling systems.

scholarly journals Effects of Exogenous Abscisic Acid (ABA) on Carotenoids and Petal Color in Osmanthus fragrans ‘Yanhonggui’

Plants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 454
Author(s):  
Yucheng Liu ◽  
Bin Dong ◽  
Chao Zhang ◽  
Liyuan Yang ◽  
Yiguang Wang ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Metabolic Pathway ◽  
Carotenoid Biosynthesis ◽  
Carotenoid Content ◽  
Native Plant ◽  
Total Carotenoids ◽  
Osmanthus Fragrans ◽  
Carotenoid Accumulation ◽  
Β Carotene ◽  
Carotenoid Degradation

Osmanthus fragrans is a well-known native plant in China, and carotenoids are the main group of pigments in the petals. Abscisic acid (ABA) is one of the products of the metabolic pathway of carotenoids. Application of ABA could affect pigmentation of flower petals by changing the carotenoid content. However, little is known about the effects of ABA treatment on carotenoid accumulation in O. fragrans. In this study, different concentrations of ABA (0, 150 and 200 mg/L) were spread on the petals of O. fragrans ‘Yanhonggui’. The petal color of ‘Yanhonggui’ receiving every ABA treatment was deeper than that of the control. The content of total carotenoids in the petals significantly increased with 200 mg/L ABA treatment. In the petals, α-carotene and β-carotene were the predominant carotenoids. The expression of several genes involved in the metabolism of carotenoids increased with 200 mg/L ABA treatment, including PSY1, PDS1, Z-ISO1, ZDS1, CRTISO, NCED3 and CCD4. However, the transcription levels of the latter two carotenoid degradation-related genes were much lower than of the five former carotenoid biosynthesis-related genes; the finding would explain the significant increase in total carotenoids in ‘Yanhonggui’ petals receiving the 200 mg/L ABA treatment.

Tobacco Chemistry/Chemische Zusammensetzung des Tabaks

1976 ◽  
Vol 8 (6) ◽  
Author(s):  
Arne J. Aasen ◽  
Sven-Olof Almquist ◽  
Curt R. Enzell
Keyword(s):  
Nicotiana Tabacum ◽  
Nicotiana Tabacum L

Abstract35: two isomeric 5,6-Epoxy-3-hydroxy-7-megastigmen-9-ones from Nicotiana tabacum L.

Inheritance of the Conversion of Nicotine to Nornicotine in Varieties of Nicotiana tabacum L. and Related Amphiploids 1

Crop Science ◽  
1964 ◽  
Vol 4 (4) ◽  
pp. 349-353 ◽  
Author(s):  
T. J. Mann ◽  
J. A. Weybrew ◽  
D. F. Matzinger ◽  
J. L. Hall
Keyword(s):  
Nicotiana Tabacum ◽  
Nicotiana Tabacum L
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