DIRECT SCIENCES: SOLVING PROBLEMS THROUGH SCIENTIFIC NETWORKING

Commercialization and Indiscriminate growth of industrial sector has led down great impact not only on our living standard but also on environment. Indiscriminate release of heavy metals as industrial pollutant has been tremendously increased. The bio-availability of toxic heavy metals ions directs biomagnification that resulted in severe health hazards. Microorganism can offers attractive, eco-friendly and possible solution to this concern. Bacteria combat metal toxicity through adapted resistance mechanisms that can be exploited to minimize the alarming effects of heavy metals. Bioremediation through resistant bacteria serve as great temptation in modern research due to its promising results. This technology still needs more exploration in order to yield maximal results. Further research on different parameters of research design for bioremediation of heavy metals can led to innovation and even more sustainable model of pollution control. This review comprehensively highlights the sources, importance, consequences of heavy metals pollution. This review also described the underlying mechanisms of metal resistance by bacterial species to combat their devastating effects in terms of environmental pollution.

Heavy metals, Pollution, Resistance mechanism, health hazards, Bioremediation, Regulatory standards

Light is fundamental precursor for plant growth and development. LED provides a uniform source of light for closed plant farming practices. The present study was carried out to investigate the effect of various wavelength light-emitting diodes (LEDs) on photosynthetic parameters of Brassica juncea. Under red light treatment, number of leaves, fresh and dry mass of roots and shoots was increased. While under blue light, stem length was longer than other lights. In combination of both lights, root length, area of leaves was greater as compared to others. Moisture content was more in plant growing under red light. The contents of chlorophyll a were higher under blue LEDs light while chlorophyll b concentration was higher under red. However, the plants grown under blue and red light exhibited closed stomata and fewer in number. The concentration of total soluble protein and soluble sugar were found highest under blue LEDs. From these results, we can conclude that red light is most significant for biomass production and chlorophyll b contents while blue light is preferable for soluble proteins and sugar concentration and chlorophyll a.

LEDs, Growth, Chlorophyll, Stomata, Brassica