The present study aims to determine the bioaccumulation of heavy metals in edible macrophytes growing in the Wetlands of Manipur, India. The study also differentiates the quantity of metals attached on the roots surface and those which are accumulated inside the plant tissue. Heavy metals Pb, Hg, Cd, As, Fe, Cu & Cr were analyzed using AAS. The adsorption of heavy metals on the surface of roots is greater than the metals absorbed in the plant tissues. The order of heavy metal accumulation in the roots and shoots was Fe> Pb> Cu> Cr>Cd>As>Hg. All the parameters (Hg, Cd, As, Fe, Cu and Cr) in the present investigation; except Pb was fall within the safe limits for human consumption set by WHO & FAO

The present study was carried out the study on host range and mode transmission of Tomato Mosaic Virus (ToMV) in three Districts of Uttar Pradesh. Experiment was conducted in vitro to see the different host range, mode of transmission with different vector. The virus was found to be inactivated between temperatures higher the dilutions and the longevity in vitro (LIV) was found 24 hours at room temperature. Virus like symptoms were found on Tomato plants in all three districts surveyed. Two major categories of symptoms were encountered in surveyed Tomato fields i.e., leaf curl and mottling or mosaic. Secondly, various plants were tested to understand the host range of virus. Thirdly, leaf samples were taken from suspected virus-infected Tomato plants then these were analyzed to get unequivocal identification of viruses that occur in Tomato plants in areas surveyed. A number of bioassays, such as indicator plant inoculation and mechanical transmission as well as grafting were conducted to conform that leaf curl, mosaic and mottling symptoms were indeed due to virus infection.

In this work, silver nanoparticles were synthesized bio-chemically at room temperature using aqueous extract of leaf of (Crataeva religiosa) plant. The present study was aimed to evaluate the compatibility of Crataeva religiosa in synthesizing silver nanoparticles and determine their antimicrobial and antioxidant assay. (1mM) concentration of silver nanoparticles were prepared and checked for the antimicrobial activity using agar well diffusion assay and measuring the zone of inhibition against seven microorganisms. Also the phytochemical screening was carried out for the aqueous extract of the plant. Phytochemical screening of C. religiosa reveals the presence of alkaloids, glycosides, terpenoids, reducing sugars, saponins and phenolic compounds. The As-synthesized nanoparticles were characterized using UV-VIS spectrophotometer, XRD, FTIR and SEM. Biological analysis revealed their antioxidant activity by (2, 2-diphenyl-1-picrylhydrazyl) DPPH assay. DPPH assay is more than the silver nanoparticles dispersed in distilled water.

Chromium (Cr) is considered as an environmental hazard. Toxicity effects of Cr (III) and Cr (VI) on growth and development of plants including inhibition of germination process decrease of growth and biomass of plant. Present review article presents the information concern to the toxicity of Cr and its health hazards on living organism based on documented research. Chromium found in environment in different oxidation states ranging from ^-2 to ⁺6. But the most stable forms are trivalent Cr (III) and hexavalent chromium Cr (VI). Trivalent chromium has poor absorption inside the cell as compared to hexavalent chromium. The most common exposure routes of chromium to humans are ingestion, dermal contact and inhalation. The primary health hazards caused by chromium are bronchial asthma, lung and nasal ulcers and cancers, skin allergies, reproductive and developmental problems and this chromium is carcinogenic in nature. When taken in excess it may cause death also