ABSTRACT
Pulses play an important role in Indian agriculture. Among the pulses, soybean (Glycine max. L)
occupies a unique place by becoming the largest source of vegetable oil and protein. It is widely
cultivated in India and occupy 5th largest production of soybean in the world. Industrialization and
population explosion has caused a serious problem of pollution in the environment in all possible
ways. As a result, most of the water resources are getting polluted by receiving large quantity of
sewages and industrial wastewaters with heavy metals. In some places, these polluted water is being
used for irrigation due to scarcity for good water. The continuous use of these wastewater containing
heavy metals degraded the soil quality and reduced the growth and yield performance of agricultural
crops. Aresenic, cadmium, chromium, cobalt, copper, lead, mercury, nickel, uranium, vanadium and
zinc are the some of the important heavy metals found in our environment. Among the heavy metals,
chromium merits a special reference for its toxic potential. It is released from the industries such as
electroplating, leather tanning, textile printing and metal finishing. It is one of the main constitutions
of tannery effluent. Presence of excess amount of chromium in the wastewater affect the plant growth
and development when it is used for irrigation. So, Laboratory study was carried to investigate the
irrigational impact of various concentrations of Cr (5, 10, 25, 50 100, 200 and 300 µg/l) on changes in
morphological (germination percentage, root length, shoot length, fresh weight and dry weight),
photosynthetic pigments (chlorophyll a, chlorophyll b, total chlorophyll, carotenoid) biomolecules
(aminoacid, protein, sugar, proline) and antioxidant enzymatic activities (catalase, peroxidase,
polyphenol oxidase and super oxide dismutase) were estimated. The accumulation of chromium in
soybean seedlings were estimated and they were correlated with the above mentioned parameters.
References
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Sankar Ganesh, K., AL.A. Chidambaram, P. Sundaramoorthy, L. Baskaran and M. Selvaraj. Influence of chromium and cadmium on germination, seedling growth and photosynthetic pigments of soybean (Glycine max L. Merr.). 2006a, Indian J. Environ. Ecoplan., 12: 291-296.
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