Accumulation of perchlorate in tobacco plants: development of a plant kinetic modelElectronic supplementary information (ESI) available: Tables S1 and S2 showing perchlorate content in tobacco plants and solutions and Figs S1 and S2 showing mean nutrient solution utilization rates and average fresh weights for perchlorate-amended plants. See http://www.rsc.org/suppdata/em/b3/b300570d/

2003 ◽  
Vol 5 (3) ◽  
pp. 505 ◽  
Author(s):  
Sarah E. Sundberg ◽  
J. Jackson Ellington ◽  
John J. Evans ◽  
Deborah A. Keys ◽  
Jeffrey W. Fisher
Keyword(s):  
Nutrient Solution ◽  
Supplementary Information ◽  
Tobacco Plants

VARIETAL DIFFERENCES IN CALCIUM LEVEL IN LEAVES OF FLUE-CURED TOBACCO

1963 ◽  
Vol 43 (2) ◽  
pp. 141-145 ◽  
Author(s):  
E. T. McEvoy
Keyword(s):  
Nutrient Solution ◽  
Calcium Level ◽  
Calcium Uptake ◽  
Leaf Tissue ◽  
Rapid Test ◽  
Radioactivity Measurement ◽  
Tobacco Plants ◽  
Varietal Differences ◽  
White Gold ◽  
Chemical Assay

Radioactivity measurement of leaf samples of tobacco plants following a 6-day absorption period in Ca45-labelled nutrient solution was found to be a rapid test for varietal differences in calcium uptake. Using this method, significant differences in the uptake of calcium were found among varieties and strains of flue-cured tobacco and the ranking of the calcium uptake potential of five strains of tobacco agreed with that obtained by chemical assay. The concentration of Ca45 in the leaf tissue was highest in Delcrest and Hicks, lowest in White Mammoth, and intermediate in Virginia Gold, White Gold, and Jadel. The same ranking of these varieties was obtained when the plants were grown in soil with added Ca45 for a 7-week absorption period. The importance of these tests is based on the findings of other workers that leaf content of calcium is inversely related to quality.

scholarly journals Bioaccumulation of 60Co2+ ions in tobacco plants

2022 ◽  
Vol 7 (1) ◽  
pp. 41-49
Author(s):  
Ľuboš Vrtoch ◽  
Martin Pipíška ◽  
Miroslav Horník ◽  
Jozef Augustín
Keyword(s):  
Growth Rate ◽  
Nutrient Solution ◽  
Root Surface ◽  
Tobacco Plants ◽  
Initial Concentration ◽  
Nicotiana Tabacum L ◽  
Tobacco Roots ◽  
Radionuclide Uptake ◽  
Exchangeable Form

Tobacco has previously been used in investigations of metals and radionuclide uptake. This study presents determination of bioaccumulation and translocation of 60Co2+ ions in tobacco plants (Nicotiana tabacum L.) grown in Hoagland’s nutrient solution. Cobalt concentration in tobacco plants increased with increasing concentration in nutrient solution. Bioaccumulation from the initial concentration C0 = 0.96 μM Co reached 90% after 7 day cultivation. Only small amounts of Co accumulated in roots, up to 2 - 4 % were removable from roots by washing with 0.1 M CoCl2, indicating that this portion of Co is bound to the root surface in ion-exchangeable form. Tobacco roots retained approximately 2/3 of accumulated cobalt and 1/3 was transported to shoots. Autoradiography revealed that 60Co was preferentially localized in younger leaves. Prolongation of cultivation time did not change the [Co]roots : [Co]shoots ratio significantly. Relationships between growth rate, transpiration rate, uptake and distribution of cobalt in plant tissue are discussed.

UTILIZING COMBINATION OF HERBICIDE COMMAND AND GROWTH STIMULATORS MELAFEN AND EMISTIM C FOR TOBACCO SEEDLING GROWING

2020 ◽  
Keyword(s):  
Toxic Effect ◽  
Leaf Area ◽  
Economic Effect ◽  
Seedling Development ◽  
Root Mass ◽  
Qualitative Properties ◽  
Tobacco Plants ◽  
Prolonged Effect ◽  
Agricultural Plants

Efficiency of combination of soil herbicide Command (CE 0.02 ml/m2) and growth stimulators Melafen and Emistim S for tobacco seedling growing in sheltered ground has been studied. Before studies inhibition properties of herbicide on first stage of tobacco growing were found. For decreasing effect of herbicide ’s depression and increasing growing processes researches during greenhouse and field stages have been carried. It has been found that soaking seeds in solution of growth stimulator Melafen (concentration 0.05 %) and Emistim S (concentration 0.00001 %) during 3 hours in combination with further treatments on basic stages of seedling development (cotyledon and ready for transplanting before pulling out) led not only to decreasing toxic effect of herbicide but also increasing qualitative properties of tobacco plants. Growth stimulators led to increasing length of plants from collar to growing point by 46-62 %, to end of tips - by 20-35 %, above ground plant mass - by 42 - 86 %, root mass - by 32 %. It was also noticed 28 - 36 % increasing outcome of standard seedlings from m2 in time of transplanting. Due to prolonged effect of Melafen and Emistim S seedlings transplanted into field were with increased surviving properties. Later, due to increased growing rate it was noticed increasing leaf area by 9-18 % and productivity - by 16-24 %. Economic effect due to utilizing growth stimulators Melafen and Emistim S during seedling stage reaches 360 and 470 rubles/m2 and during field stage - 66 and 98 th.rubles/ha respectively. Offered elaboration can be utilized for protecting systems of different agricultural plants where utilizing soil herbicides is recommended. Also quality of cured tobacco grown with stimulators had been improved.

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