Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Phytochemical investigation of some flowering parasitic plants of arid zone of Rajasthan growing in vivo and tissue culture

Auteur : Yadav, Dayashree

Université de soutenance : Maharaja Ganga Singh University

Grade : Doctor of Philosophy (PhD) 2009

Sommaire partiel
The purpose of proposed study was to investigate the nature and effect on hving organisms, analyzed for the quahty and quantity, nature and biosynthesis of antimicrobial substances, primary products like amino acids, ascorbic acids, nutritive content and secondary metabolites such as alkaloids, steroids, flavonoids, sapogenins and effect of ethanol crude extract on developmental stages of Rana cyanophlyctis and tissue culture studies from flowering parasitic plant species of Rajashtan i.e. Cistanche tubulosa and Orobanche aegyptiaca. The following plant species are tentatively selected for the investigation : 1. Cistanche tubulosa Wight. (Orobanchaeae) 2. Orobanche aegyptiaca Pers.Syn.(Orobanchaceae) These plants have been reported in Chinense medicine to have therapeutic value in the treatment of a wide variety of disease conditions. All the plants are indigenous to the arid zone and are available for research work and also to the local people for use in the treatment of disease locally seen in particular and at other places in general and thus form a base to go into the details of scanning their medicinal values. Arid zone plants of Rajasthan are good candidates for the production of various types of secondary metabolites which makes them resistant from drought, salinity and pathogens. I have worked on two genera of angiospermic parasitic plant of Orobanchaceae family namely Cistanche tubulosa wight. (Orobanchaceae) and Orobanche aegyptiaca Pers.Syn.(Orobanchaceae). Both parasitic plants are widely distributed in the arid and semi arid areas of western Rajasthan and are seen to grow on stabilized sand dunes and sandy plains as complete root parasite on Acacia nilotica, Aerva tomentosa, Calligonum polygonoides, Calotropis procera, Capparis deciduas, Echinops echinatus, Laptadenia pyrotechnica, Prosopis cineraria, Salvadora persica and Brassica campestris, Cicer arietenum and Eruca sativa etc. The sudden appearance of the parasite in late winter months, its brief hfe cycle, gregarious occurrence, wide distribution, extensive host range, production of seeds in large number, stout and succulent stem densely packed with starch grains preponderance of mucilaginous substances, abundance of pigments (soluble in water, alcohol, acid and alkali) and medicinal utility were some of the very interesting features which needed detailed investigations.

Mots clés : Ascorbic acid Cistanche tubulosa Flowering parasitic plants Life Sciences,Plant and Animal Science,Plant Sciences Phytochemical investigation Tissue culture

Présentation et version intégrale (Shodhganga)