3 results on '"Maiti, Satyabrata"'
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2. Plant regeneration from callus cultures of Vitex trifolia (Lamiales: Lamiaceae): a potential medicinal plant
- Author
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Samantaray, Sanghamitra, Bishoyi, Ashok Kumar, and Maiti, Satyabrata
- Subjects
micropropagation ,Plants, Medicinal ,regeneración plantas ,food and beverages ,in vitro ,ADN polimórfico amplificado aleatoriamente ,Random Amplified Polymorphic DNA Technique ,plantas medicinales ,Vitex ,micropropagación ,medicinal plant ,lcsh:Biology (General) ,Plant Growth Regulators ,adn polimórfico amplificado aleatoriamente ,inter simple sequence repeats ,Regeneration ,repetición inter secuencia simple ,plant regeneration ,lcsh:QH301-705.5 ,Plant Shoots ,randomly amplified polymorphic dna ,Microsatellite Repeats - Abstract
Vitex trifolia is a shrub species with popular use as a medicinal plant, for which leaves, roots and flowers have been reported to heal different distresses. The increasing exploitation of these plants has endangered its conservation, and has importantly justified the use of biotechnological tools for their propagation. Our aim was to present an efficient protocol for plant regeneration through organogenesis; and simultaneously, to analyze the genetic homogeneity of the established clonal lines by Randomly Amplified Polymorphic DNA (RAPD) and Inter Simple Sequence Repeat (ISSR) markers. Plantlet regeneration was achieved in callus cultures derived from stem, leaf and petiole explants of V. trifolia on a differently supplemented Murashige & Skoog medium, and incubated at 25±2ºC under a light intensity of 61μmol/m2s from cool white fluorescent lamps and a 16h photoperiod. The rate of shoot bud regeneration was positively correlated with the concentration of hormones in the nutrient media. Shoot buds regenerated more rapidly from stem and petiole explants as compared to leaf explants on medium containing 11.10μM BAP in combination with 0.54μMNAA. Addition of 135.74-271.50μM adenine sulphate (Ads) and 0.72-1.44μM gibberellic acid (GA3) to the culture medium increased the growth of shoot buds. The highest rate of shoot bud regeneration responses was obtained in stem explants using 11.10μM BAP in combination with 0.54μM NAA, 271.50μM Ads and 1.44μM GA3. In vitro rooting of the differentiated shoots was achieved in media containing 1.23μM indole butyric acid (IBA) with 2% (w/v) sucrose. Regenerated plantlets were successfully established in soil with 86% survival under field condition. Randomly Amplified Polymorphic DNA and Inter Simple Sequence Repeat markers analyses have confirmed the genetic uniformity of the regenerated plantlets derived from the second up to fifth subcultures. This protocol may help in mass propagation and conservation of this important medicinal plant of great therapeutic potential. Vitex trifolia es una especie arbustiva de uso popular como planta medicinal, sus hojas, raíces y flores se han reportado para la cura de diferentes aflicciones. El aumento de la explotación de estas plantas ha puesto en peligro su conservación y ha justificado el uso de herramientas biotecnológicas para su propagación. El objetivo de esta investigación fue presentar un protocolo eficiente para la regeneración de estas plantas a través de la organogénesis, y analizar la homogeneidad genética de las líneas clonales establecidas por ADN polimórfico amplificado aleatoriamente (RAPD) mediante la repetición de marcadores de inter secuencia simple (ISSR). La regeneración de plántulas se logró en cultivos de callos derivados de explantes de tallo, hoja y pecíolo de V. trifolia en un medio diferenciado Murashige & Skoog, que se incubaron a 25±2ºC bajo una intensidad de luz de 61μmol/m2s con lámparas fluorescentes blancas y un fotoperíodo de 16h. La tasa de regeneración de brotes se correlacionó positivamente con la concentración de las hormonas en el medio nutritivo. Los brotes se regeneraron más rápidamente a partir de explantes de tallo y pecíolos en comparación con explantes de hoja. La mayor tasa de regeneración de brotes se obtuvo en los explantes de tallo utilizando 11.10μM BAP en combinación con 0.54μM NAA, 271.50μM Ads y 1.44μM GA3. Este protocolo puede ayudar a la propagación masiva y conservación de esta importante planta medicinal de gran potencial terapéutico.
- Published
- 2013
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3. Factors influencing rapid clonal propagation of Chlorophytum arundinaceum (Liliales: Liliaceae), an endangered medicinal plant.
- Author
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Samantaray, Sanghamitra and Maiti, Satyabrata
- Subjects
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CHLOROPHYTUM , *LILIALES , *MEDICINAL plants , *PLANT roots , *GERMINATION , *PLANT habitats - Abstract
Chlorophytum arundinaceum is an important medicinal plant and its tuberous roots are used for various health ailment treatments. It has become an endangered species in the Eastern Ghats, and a rare medicinal herb in India, due to its excessive collection from its natural habitat and its destructive harvesting techniques, coupled with poor seed germination and low vegetative multiplication ratio. In order to contribute to its production systems, an efficient protocol was developed for in vitro clonal propagation through shoot bud culture. For this, multiple shoots were induced from shoot bud explants on Murashige and Skoog's medium supplemented with 2.5-3.0mg/L BAP, 0.01-0.1mg/L NAA and 3% (w/v) sucrose. Inclusion of Adenine Sulphate (25mg/L) in the culture medium improved the frequency of multiple shoot production and recovered the chlorotic symptoms of the leaves. Media having pH 5.9 and 4% sucrose showed significant improvement on shoot bud multiplication and growth. In vitro flowering was observed when the subcultures were carried out for over four months in the same multiplication media. Rooting was readily achieved upon transferring the shoots on to half- strength MS medium supplemented with 0.1mg/L IBA and 2% (w/v) sucrose. Micropropagated plantlets were hardened in the green house, successfully established, and flowered in the field. This method could effectively be applied for the conservation and clonal propagation to meet the demand of planting materials. Rev. Biol. Trop. 59 (1): 435-445. Epub 2011 March 01. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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