Abstract

The present investigation was aimed to assess the impact of crude extracts of certain plants such as Ocimum sanctum, Cardiospermum halicacabum, Mentha longifolia was tested for their repellant activity against Tribolium castaneum in the laboratory condition. Among the extracts tested the ethanol extracts showed remarkable repellent activities than hexane and ethyl acetate at 200µg/ml.  The finding of the present study indicates that the possible role of utilization of plant and plant associated products to control the coleopteran beetle T. castaneum as an alternate strategy to the chemical pesticides.

A11INDIGENOUS PLANTS AGAINST ADULTS 

                                                   Abstract

In the present work an attempt was made to reclamation the sodium chloride stressed plant with calcium chloride. For this work, Zea mays var. – co – 24 was cultivated in control, NaCl alone, and in combined salt (NaCl + CaCl₂). From the present study it is observed that Zea mays could survive up to 40mM NaCl alone and combined salt (40mM NaCl +5mM CaCl₂); However, the favorable growth responses were confined to combined salt (10mM NaCl +5mM CaCl₂). NaCl treatment decreased the growth parameters such as percentage of seed germination, shoot and root length, number of leaves, fresh and dry weight of leaf, stem and root of Zea mays as compared with control plants. However the supplemental calcium chloride increase the growth parameter as compared to plants stressed with NaCl.

A3Effect of CaCl2 on growth

Abstract

            The tannery effluent is a mixture of biogenic matter of hides and a large variety of organic and inorganic chemicals. It usually contains high concentration of toxic metals like copper, chromium, zinc, cadmium, nickel and chemicals like aliphatic sulfonates and cyanides. The use of plants for bioremediation is called as phytoremediation. It involves the use of green plants to decontaminate soil, water and air. It is a cost effective process and the end products are nonhazardous. In the present study a hyper accumulating plant Brassica juncea was grown in different concentrations of effluent and their biochemical parameters carotenoid, chlorophyll, chromium, nickel and zinc were analyzed in leaves, stem and seeds. The results show that the heavy metal contents were higher in stem compared to leaves indicating the transports of these are high in stem. Chlorophyll and carotenoid contents  of  plants treated with  25 per cent  effluent was higher compared to  50 per cent effluent treated plants. Higher the dilution lesser the harmful effect of effluent on the plants.

A1Tannery Effluent pdf

Tribal medicine is considered as mother of indigenous systems of ethnomedicine. In the present study ethnomedicinal plant survey was carried out among Irular Tribes who settled in Javadhu hills, which is located in Southern Eastern Ghats of Tamil Nadu.  About 30 species of ethnoherbal medicinal plants belonging to 13 families were reported in the present study. The survey indicates that many number of ethnomedicinal plants were traditionally used by the Irular tribes of Javadhu hill for the treatment of various diseases.

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The viruses in the family, Geminiviridae are the most devastating pathogen infecting plants.  Among the seven genera within the family Geminiviridae, Mastrevirus and Begomovirus are primarily the most destructive.  However, their codon usage analysis is not examined and hence its role in geminivirus host range evolution remains unrevealed.  In this study, a detailed comparative analysis was performed using species of Maize streak virus (MSV) and Tomato leaf curl virus (ToLCV).  Our results suggest the possible interaction of mutational pressure and natural selection.  Correspondence analyses indicate that the evolution of MSV and ToLCV is independent of their geographical location.  Hence, we emphasize the role of codon usage pattern of these viruses in their evolution.

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The present study deals with the effect of metal toxicity (aluminum, lead and combination of both the metals) on seed germination, root length, shoot length, seedling length and dry biomass of  Vigna ungiculata (L.) Walp.  Lead adversely affected the seedling by significantly reducing the growth whereas aluminum did not show such effect in the species. Percentage of germination was good in the species at different concentration of treatment (aluminum, lead and combined treatment). Shoot length was also not much affected in Vigna ungiculata (L.) Walp. The species showed the purpling of stem. Dry biomass of Vigna ungiculata  (L.) Walp. However, dry biomass decreased to a lesser extent when treated with aluminum, lead and combined treatment as compared to control.

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Mimosa pudica L. is a medicinal herb. The in vitro regeneration protocol of this plant through shoot tip and nodal, Root tip explants. The explants were culured on MS medium supplemented of different concentrations Benzyl amino acid purine (BAP), Kinetin (KN), 2,4-Dichlorophenoxy acetic acid (2,4-D), IAA, NAA, IBA and GA3 were (0.5 to 2.5 mg/l) used. Elongation of regenerated shoots tip, nodel, shoot tip using different growth regulators. Induction of roots from the regenerated shoots. Hardened regenerant were acclimatized to the soil.

PDF Copy Of In vitro clonal propagation of vulnerable medicinal plant, Mimosa pudica L.