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The antimicrobial effect of the polyphenol mangiferin obtained from leaves of mango tr was studied according to the diffusion method. The solutions of mangiferin in polyetl ene glycol-400 showed an activity with regard to seven bacterial and five fungal spec - Bacillus pumilus, Bacillus cereus, Staphylococcus aureus, Staphylococcus citreus, Escherichia ( Salmonella agona, Klebsiella pneumoniae, Saccharomyces cerevisiae, Thermoascus aurantiai Trichoderma reesei, Aspergillus ßavus and Aspergillus fiimigatus. Its antioxidant activity w regard to the free radical 2,2-diphenyl-l-picrylhydrazyl (DPPH) was also studied, as concentration of mangiferin causing 50% inhibition of the free radical (ICS0) was assa; to be 7.5 ± 0.0075 jug/ml.
The present investigation is aimed at studying the effect of ethrel on the ripening of off-season fruits of Mangifera indica L. var. Neelum. The control fruits were kept in the laboratory naturally while the experimental fruits were treated with different concentrations of ethrel (100, 200 and 300 ppm). In control fruits, partial ripening led to incomplete metabolic changes, which did not alter the presence of sourness in the fruits. Hence, they were not fit to be eaten. On the other hand, the fruits treated with different concentrations (100, 200 and 300 ppm) of ethrel ripened on 13th day, 11th day and 9th day respectively after treatment. The colour changed from green greenish to yellow and the fruits were palatable in nature. The starch decreased during ripening, both in the treated and control fruits. On the other hand, the sugar, alpha-amylase, beta-amylase, activities increased. Among the different 100, 200 and 300 ppm ethrel treatments, the 200 ppm alone had the optimum effect on the ripening of off-season fruits of Mangifera indica L. var. Neelum.
A severe white rot decay of a very old mango (Mangifera indica L.) tree trunk was observed form Himachal Pradesh, a hilly state of north India. The initial of decaying symptoms were firstly noticed in 2010 which progressed with destructive tissue death of tree trunk. A spongy, sessile, bracket-fungus was found associated with the decay. Morphological and microscopic examination of the collected specimens confirmed the fungus as Phellinus gilvus (Schw.) Pat. Since, P. gilvus is a saprobic fungus having a wide host range worldwide and M. indica is one of the most attacked hosts in India. Therefore, the present report is an important addition to the existing knowledge which will be helpful in understanding the pathogen diversity and interaction with host.
The study was performed on 137 Y. enterocolitica strains belonging to various serological groups, including 75 O3 group strains isolated form human clinical material. The agglutination test on slides was carried out on this strains using Mangifera indica extract of own production. Agglutinating preparation obtained from the seeds of M. indica agglutinated Y. enterocolitica organisms possessing the pVY plasmid and CRMOX+ phenotype in dilutions to 1,56 µm/ml. In identification tests conducted paralelly agglutination solution was used in concentrations of 100 and 10 µm/ml. All clones of Y. enterocolitica from 03 group from cultures at 37°C and with CRMOX+ phenotype possessing the pVY plasmid were agglutinated by the extract. Agglutination failed to develop in the cultures of these clones incubated at 25°C. Yersinia clones not containing the pVY plasmid with CRMOX" phenotype were resistant to agglutination. The virulence plasmid was found in 44 out of 75 strains of Y. enterocolitica O3 and was identified by restriction analysis after plasmid DNA digestion with Eco RI enzyme. The obtained results agreed with those of Wauters et al. in 1995 and confirmed the opinion of these authors on the usefulness of the test with M. indica agglutinin for the identification of virulent Y. enterocolitica strains.
Mango (Mangifera indica L.) is a highly popular tropical fruit. One of the factors causing the low production of mango is fruit drop. Many factors cause fruit drop, one of them being a phytohormonal imbalance. The objective of this research was to compare the content of indole-3-acetic acid (IAA), 1-amino cyclopropane-1- carboxylic acid (ACC), and carbohydrate between persistent and pre-abscission fruits of two cultivars Gadung 21 and Lalijiwo. Pre-abscission fruit had lower IAA and total sugar, but higher ACC and starch than persistent fruit for both cultivars.
The present invention was undertaken to study and determine the effect of potassium metabisulphite (6%) and potassium sorbate (350 ppm) treatments on the nutritional quality of osmotically-dehydrated, infrared- and microwave-blanched dried mango slices (local cultivars “Chaunsa” and “Fajri”) stored for the period of 6 months under ambient conditions. The studied parameters included physical characteristics such as water activity, non-enzymatic browning, and color values, chemical parameters such as moisture, ash, fi ber, acidity and content of proteins, sugars, vitamin C, total carotenoids, and sensory attributes such as appearance, fl avor and texture. Vitamin C content in osmotically-dried mango slices was higher than that of IR and MW blanched dried mango slices but the content of vitamin C of both cultivars was lower than of the fresh mango samples (Chaunsa: 135 mg/100 g, Fajri: 94 mg/100 g). Signifi cant loss was noticed in total carotenoids content of both the cultivars with passage of time because of their susceptibility to oxidative loss caused by dry heat. No growth of yeast and mold was detected in potassium sorbate-treated dried mango slices due to their preservative effect. From the point of view of the composition and sensory quality, dried mango slices of both the cultivars have excellent nutritional qualities.
Mangiferin, a C-glucopyranoside of 1, 3, 6, 7-tetrahydroxyxanthone, has been isolated from various parts of Mangifera indica (Anacardiaceae). The conclusive structure of mangiferin has been established by various researchers using a wide range of chemical and spectral analytical techniques. Mangiferin has been traditionally used in some parts of world as anti-inflammatory, analgesic, antipyretic, antioxidant, immunomodulator, antitumor, antiviral, and anthelminthic and in obesity treatment. The present article is an attempt to encompass various aspects and details related to the characterization of mangiferin and its subsequent pharmacological screening. The literature data on mangiferin has been comprehensively reviewed and evaluated by the authors and hence, the article contains brief description of phytochemical and pharmacological investigations conducted on mangiferin till now and thus may prove as a guiding force for further research in this particular area.
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