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Effect of ethanol on the longevity and abscission of bougainvillea flower  [PDF]
A. B.M.Sharif Hossain
Maejo International Journal of Science and Technology , 2007,
Abstract: The experiment was carried out to study the effect of different concentrations of ethanol on bougainvillea flower vase life and delay abscission. Young and fresh flowers were harvested from 4 years bougainvillea trees randomly. Flower stems (petiole) were placed individually in an open solution containing different concentrations of ethanol immediately after harvesting and were placed at 28 0C of room temperature. The treatments were water control, 2, 4, 8, 10, 20, 30, 40, 50 and 70% ethanol. Positive response was found in case of 8 and 10% ethanol after 5 days of treatment. Dry weight was higher in lower concentration of ethanol and lower in higher concentration. Flower longevity was 2 days more in 8 and 10% ethanol than water control and other concentrations of ethanol. Petal wilting and abscission occurred 2 days later than water control. Perianth abscission was later in 8 and 10% ethanol than water control. Percent petal scar (color changing) was later in water control, 2, 4, 8 and 10 than 20, 30, 40, 50 and 70% ethanol The result showed flower vase life was significantly affected by ethanol concentrations and longevity was more in 8 and 10% ethanol than water control and other concentrations.
Anti-diabetic Properties of the Aqueous Leaf Extract of Bougainvillea glabra (Glory of the Garden) on Alloxan-Induced Diabetic Rats  [PDF]
Grace I. Adebayo,Oluwakemi T. Alabi,Bamidele V. Owoyele,Ayodele O. Soladoye
Records of Natural Products , 2009,
Abstract: The antidiabetic and antilipidemic effects of Bougainvillea glabra was investigated in this study using 25 male wistar rats. The rats were divided into 5 groups comprising of five animals each. These groups include a normal control (administered saline), an extract control (administered 100 mg/kg of extract) and a diabetic control (untreated group). The remaining two groups were administered 100mg/kg and 400 mg/kg of the extract respectively. The study lasted for three weeks although blood samples were obtained from the rat tails after every week. The results show that the extract significantly (p< 0.05) reduced the hyperglycaemia from 12±0.40 mmol/L (Diabetic Control) to 4.04±0.03 mmol/L (400 mg/kg group). Likewise, the extract significantly reduced the Total Cholesterol (TC), Triglyceride (TG) and Low-Density Lipoprotein Cholesterol (LDL-Cholesterol), while increasing the High-Density Lipoprotein Cholesterol (HDL-C). In conclusion, the observations from this study show that Bougainvillea glabra has antidiabetic effect and beneficial effects on blood lipid profile, thus justifying the use of the plant by traditional medicine practitioners for the treatment of diabetes mellitus.
New Dye-Sensitized Solar Cells Obtained from Extracted Bracts of Bougainvillea Glabra and Spectabilis Betalain Pigments by Different Purification Processes  [PDF]
Angel Ramon Hernandez-Martinez,Miriam Estevez,Susana Vargas,Fracisco Quintanilla,Rogelio Rodriguez
International Journal of Molecular Sciences , 2011, DOI: 10.3390/ijms12095565
Abstract: The performance of a new dye-sensitized solar cell (DSSC) based in a natural dye extracted from the Bougainvillea spectabilis’ bracts, is reported. The performance of this solar cell was compared with cells prepared using extract of the Bougainvillea glabra and mixture of both extracts; in both cases the pigments were betalains, obtained from Reddish-purple extract. These dyes were purified to different extents and used for the construction of solar cells that were electrically characterized. The materials were characterized using FTIR and UV-Vis. Solar cells were assembled using TiO 2 thin film on indium tin oxide (ITO)-coated glass; a mesoporous film was sensitized with the Bougainvillea extracts. The obtained solar energy conversion efficiency was of 0.48% with a current density J SC of 2.29 mA/cm 2 using an irradiation of 100 mW/cm 2 at 25 °C.
Colours Intensity and Flower Longevity of Garden Roses
Antonio Ferrante,Alice Trivellini,Giovanni Serra
Research Journal of Biological Sciences , 2012, DOI: 10.3923/rjbsci.2010.125.130
Abstract: Interactions of garden botanical composition with human senses generate sensations and emotions that may give pleasure and welfare to observers. Among the garden plants, roses are the most important for the wide range of varieties and flower colours. This review is focused on physiological factors that regulate flower longevity and colour persistence in roses that are generally used for garden decorations. Genes that encode for pigments biosynthesis can be used for improving flower colours. The colour persistence of flowers is tightly related to senescence. In fact, senescence associated genes have been discovered and the study of their function may be useful for genetic improvement for extending the flowering periods. The flower colour and the length of the flowering periods are very important factors that contribute to the garden beauty. Colours cannot be objectively appreciated because they can be differently appreciated by the observers. Therefore, sensations and emotions that rose alone or in combinations with other shrubs and perennials in a garden cannot be predictable.
Bract Size Enlargement and Longevity of Bougainvillea spectabilis as Affected by GA3 and Phloemic Stress  [PDF]
Mohammed Saifuddin,A.B.M. Sharif Hossain,Normaniza Osman,K.M. Moneruzzaman
Asian Journal of Plant Sciences , 2009,
Abstract: A field experiment was conducted to assess the effect of gibberellic acid (GA3 100 and 150 ppm), phloemic stress and combination of 100 ppm GA3 and phloemic stress on Bougainvillea bract blooming, expansion, development and bract longevity under exposed sun light condition (400-700 μEm-2 sec-1). A seven-years-old Bougainvillea plant was used in this experiment. Fifteen selected brunches were applied with 100, 150 ppm GA3, phloemic stress, 100 ppm GA3+phloemic stress and water control. The results showed that 100 ppm GA3 increased the length of petiole, bract size and shape by 40%. Bract blooming was three days earlier in 100 ppm GA3 treated branches and 4 days earlier in 150 ppm GA3 than in water control. Bract longevity (required days from bract initiation to abscission) was higher for 4 in phloemic stress and for 2 days in 100 ppm GA3+phloemic stress than in water control. However, bract longevity was shorter in 100 and 150 ppm GA3 than in control. The number of bracts per branch was higher in 100 ppm GA3+phloemic stress and phloemic stress than the other treatments. Petal size and petiole length were the highest in 100 ppm GA3. But there were no significant changes in bract size and color development in phloemic stress. Maximum chlorophyll fluorescence was observed in phloemic stress. Quantum yield (Fv/Fm) was higher in phloemic stress and 100 ppm GA3+phloemic stress than in other treatments. The findings suggested that gibberellic acid played an important role to induce rapid bract blooming and expansion whereas, phloemic stress increased total number of bract and longevity.
The Effects of Naphthaleneacetic Acid and Gibberellic Acid in Prolonging Bract Longevity and Delaying Discoloration of Bougainvillea spectabilis  [PDF]
Mohammed Saifuddin,A.B.M.S. Hossain,O. Normaniza,A. Nasrulhaq Boyce
Biotechnology , 2009,
Abstract: In this study, experiments were conducted to investigate the effects of NAA and GA3 on bract longevity under exposed sunlight conditions and six months of observation. Bougainvillea bracts at four different stages of bract development were sprayed with gibberellic acid (100 ppm GA3), naphthaleneacetic acid (50, 100 and 150 ppm NAA) and mixed GA3 (100 ppm) and NAA concentrations (50,100 and 150 ppm). Bract longevity was found to be almost 10 days longer in NAA (50, 100 and 150 ppm) than in the water control and in GA3 (100 ppm) treatment. In the case of GA3 and NAA (50, 100 and 150 ppm) treatment on alternative days, bract longevity was 30 days longer when compared with the water control. It was also observed that a delay in discoloration and stomata conductance were increased in the presence of GA3 with low a concentration of NAA. The results indicated that the prolonging effect of low concentrations of NAA at the initial budding stages was more effective compared with its application at other stages of development and at higher concentrations. Maximum bract weight and shoot length were observed in the GA3 and GA3 plus NAA treated flowers.
Antibacterial Activity of Bougainvillea Glabra, Eucalyptus Globulus, Gnaphalium Attenuatum, and Propolis Collected in Mexico  [PDF]
Oswaldo Javier Enciso-Díaz, Alfonso Méndez-Gutiérrez, Lourdes Hernández De Jesús, Ashutosh Sharma, María Luisa Villarreal, Alexandre Cardoso Taketa
Pharmacology & Pharmacy (PP) , 2012, DOI: 10.4236/pp.2012.34058
Abstract: Bougainvillea glabra C., Eucalyptus globules Labill., and Gnaphalium attenuatum DC., as well as propolis, have been used in Mexican traditional medicine as a remedy to treat respiratory illnesses. There are few biological reports of such material collected in Mexico, despite the high demand for them as raw material for popular and industrial uses. The antibacterial activity of the plants and propolis studied here were evaluated against a panel of bacteria using three different methodologies: agar disc diffusion, macro and micro dilution methods. E. globules and G. attenuatum extracts showed the strongest active values (P > 0.05) in the agar disc diffusion method with a range of 8 - 22 mm inhibition zone, MIC values ranging from 25 - 250g/mL, and MBC values of 25 - 500g/mL obtained by macro and micro dilution methods. B. glabra extracts were active against E. coli, S. typhi, K. pneumoniae, S. aureus and S. agalactiae, with 8 - 13 mm inhibition zone, MICs ranging from 500 - 3000g/mL, and MBCs of 1000 - 3000g/mL. The propolis extract turned out to be active against E. coli, K. pneumoniae, S. aureus and S. agalactiae, with values of 7 - 12 mm, MICs of 1000 - 2000g/mL, and MBCs of 2000 - 2500g/mL. E. globules and G. attenuatum extracts were the most active in the three methodologies assayed. This is also the first time that the antibacterial activity of G. attenuatum has been experimentally demonstrated. The microdilution method showed to be more sensitive, less expensive and minor time-consuming technique compared with the other two.
Structural Comportment of Extract of Bougainvillea xbuttiana Flower Incorporated in Silica Xerogel Matrix  [PDF]
José Martínez-Mendoza, Erika Espericueta-González, Diana Espericueta-González, Gerardo Ortega-Zarzosa, Azdrubal Lobo Guerrero
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.76078
Abstract: Measurement of the fluorescence comportment of Bougainvillea xbuttiana flowers embedded in silica xerogels matrix prepared with two different water to tetraethyl-orthosilicate [Si(OC2H5)4] ratio molar of 11 and 5, without heat-treatment, we report the grade of biostability of compound. The structural comportment for the PSI and PSII present in Bougainvillea flower is similar to the structural comportment for these photosystems present in leaves when they are incorporated on inorganic matrix such as silica xerogels. The contribution of the natural pigment of this kind of flower such as betalains which consist of betaxanthins and betacyanins, determines their colors contributed in the range of wavelength from about 550 nm to 660 nm.
Effect of Sowing Media and Gibberellic Acid on the Growth and Seedling Establishment of Bougainvillea glabra, Ixora coccinea and Rosa chinensis. 2. Root Characters
AA Fagge, AA Manga
Bayero Journal of Pure and Applied Sciences , 2011,
Abstract: Two pot experiments were carried out in the screen house of the Faculty of Agriculture Bayero University Kano (Latitudes 80 421N and 90301N) during the wet and dry seasons of 2008/2009 to investigate the effects of Sowing Media and Gibberellic acid (GA3) concentrations on the growth and seedling establishment of three ornamental plant species. The treatments consisted of three sowing media (Top soil TS, mixtures of Top soil plus Poultry manure TS+PM and Top soil plus Sawdust TS+SD) in the ratio of 2:1, three GA3 concentrations (0, 100 and 200ppm) and three plant species (Bougainvillea, Ixora and Rose); factorially combined and laid out in a completely randomized design with four repetitions. The results indicated that TS+SD medium gave significantly (P<0.05) higher number of roots and root lengths per plant while the least was with TS+PM medium. TS and TS+SD media were significantly higher than TS+PM medium in terms of root fresh weight and root dry weight per plant. Application of GA3 at 100ppm compared to 0 and 200ppm concentrations gave significantly (P<0.05) better responses for all the root characters. The same trend was true for Bougainvillea compared to Ixora and Rosa. Hence, based on the outcomes of this experiment, combinations of TS+SD medium and GA3 at 100ppm concentration are recommended for better root establishment, growth. and development in relation to the three plants under study.
Effect of Sowing Media and Gibberellic Acid on the Seedling Establishment and Growth of Bougainvillea glabra, Ixora coccinea and Rosa chinensis. 1: Shoot Characters
AA Fagge, AA Manga
Bayero Journal of Pure and Applied Sciences , 2011,
Abstract: Two pot experiments were carried out in the screen house of the Faculty of Agriculture Bayero University Kano (Latitudes 80 421N and 90301N) during the wet and dry seasons of 2008/2009 to investigate the effects of Sowing Media and Gibberellic acid(GA3) concentrations on the seedling establishment and growth of three ornamental plant species. The treatments consisted of three sowing media (Top soil TS, mixtures of Top soil plus Poultry manure TS+PM and Top soil plus Sawdust TS+SD) in the ratio of 2:1, three GA3 concentrations (0, 100 and 200ppm) and three plant species (Bougainvillea, Ixora and Rose); factorially combined and laid out in a completely randomized design with four repetitions. The results indicated that TS and TS+SD gave significantly (P<0.05) greater number of days to bud break, leaf area, leaf fresh weight and leaf dry weight per plant. Application of GA3 at 100ppm gave higher value of all the characters studied except number of days to bud break, where no significant difference was observed among the different concentrations. Bougainvillea was significantly (P<0.05) higher than the other plants in all the characters except days to bud break. The Combination of TS+SD medium and GA3 at 100ppm concentration is recommended for the good growth and development of the shoot characters.
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