Abstract
The present investigation focuses on the effect of a tannery effluent on germination of early seedling growth and of Oryza sativa var. IET-4786. Seedling growth is indicated by root length, shoot length, vigour index, tolerance index and photosynthetic pigment content including chlorophyll (Chla, Chlb and total Chl) and carotenoids. Paddy seeds were procured from the Rice Research Institute, Chinsurah, West Bengal, and selected to grow in Petri plates irrigated with various effluent concentrations [control (0%), 20%, 25%, 50%, 75% and 100%]. Imbibition was higher in the lower effluent concentrations and gradually decreased with increasing concentrations during the soaking process before they were placed in Petri plates lined with effluent-soaked filter papers. At dilutions up to 50%, the effluent imparted growth-promoting traits, while at higher concentrations (75% onwards), inhibition of germination and reduction in root and shoot length, vigour index, and tolerance index were recorded; photosynthetic pigment (both chlorophylls and carotenoids) content was also found to decline.
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