Comparative Phytochemical Investigation and Determination of Total Phenols and Flavonoid Concentration in Leaves and Flowers Extract of Delonix regia (Boj. Ex. Hook)

Medicinal plants are the potent source of biologically active compounds and have always been of field of interest for the effective chemotherapeutic agents and offering a broad spectrum of activity with greater emphasis on preventive action. The objective of the present study was to evaluate the phytochemical constituents, total phenol and total flavonoids content in leaves and flowers different extract of Delonix regia. Qualitative analysis of various phytochemical constituents and quantitative analysis of total phenolics and flavonoids were determined by the well-known test protocol available in the literature. Quantitative analysis of phenolic and flavonoids was carried out by Folins Ciocalteau reagent method and aluminium chloride method respectively. Phytochemical analysis revealed the presence of phenols, flavonoids, alkaloids and carbohydrate. The present study concluded that the crude extract of Delonix regia is a rich source of secondary phytoconstituents which impart significant antioxidant potential. It is expected that the important phytochemical properties recognized by our study in the indigenous medicinal plants will be very useful in the curing of various diseases when taken along with our food. Keywords: Delonix regia, Phytochemical screening, Folins ciocalteau reagent, Aluminium chlorid

Efficacy of Fungicides for Control of White Mold (Sclerotinia sclerotiorum Lib.) De Bary in Lima Bean

White mold of lima bean (Phaseolous lunatus) caused by Sclerotinia sclerotiorum is a major disease in India. Isolates of the pathogen from different region of Uttar Pradesh were assayed both in vitro and in the greenhouse (in vivo) for their sensitivity to eight commercially available fungicides, viz., dithiocarbamic acid, carbendazim, ziram, phenylthiourea, carboxin + dithiocarbamic acid, difenoconazole, hydrogen sulphide, and mancozeb. Phenylthiourea and difenoconazole were found to be most effective and these inhibited radial growth of the test organism a level of to 71.5% and 70.5%, respectively. These two fungicides were also found as most promising in controlling the disease under greenhouse conditions, reducing disease severity to 0.14% and 0.22%, respectively compared to the control where it was 18.9%

Recurrent Somatic Embryogenesis and Plantlet Regeneration in Psidium guajava L.

A simple and efficient protocol for recurrent somatic embryogenesis and plant regeneration is one of the prerequisites for genetic improvement of guava. An efficient reproducible regeneration somatic embryogenesis protocol was developed in four genotypes of Psidium guajava L. using immature zygotic embryo as starter explant. Somatic embryogenesis induction was obtained on MS basal medium supplemented with 2.0 mgL-1 2, 4-D, 400 mgL-1 L-glutamine, 6% sucrose and 500 mgL-1 Malt extract. Following SE induction different developmental stages of somatic embryos (Globular, heart-shaped, torpedo, cotyledonary) was directly obtained and further recurrent embryogenesis also obtained upon prolonged incubation in induction media. Addition of polyethylene glycol (50 mgL-1) significantly improved the embryos maturation in MS supplemented with and 3% sucrose. The regeneration in MS medium supplemented with BAP (0.5 mgL-1), NAA (0.2 mgL-1), casein hydrolysate (100 mgL-1) and 3% sucrose. High plant regeneration frequency and intensity of somatic embryos (58.5%) obtained. Plant maturation on MS medium supplemented with BAP 2.0 mgL-1 with 2% sucrose. The rooted plants was successfully acclimatize in the greenhouse with a survival rate of 85%. This somatic embryogenesis protocol developed would be helpful in establishment of genetically modified guava aimed at seedlessness, increased shelf life and wilt disease

Filtre de Dériche architectures temps réel pour la segmentation multi-résolution

Si le filtre de Deriche est couramment utilisé sous sa forme logicielle, son implantation matérielle temps réel reste un challenge. Dans cet article, nous proposons de résoudre les effets de bords d'image liés à l'implantation récursive, de montrer que des coefficients sur 3 bits sont suffisants en récursif et qu'un filtre RIF à noyau large conduit à des résultats de qualité comparable à l'approche RII pour une complexité moindre, rendant possible la multi-résolution temps réel