Effect of salt stress on different germination and growth of Oryza sativa

Oryza sativa is a major crop plant cultivated on a large scale to supply the demand of food requirement of ever increasing population. In the present study seeds of rice plant were germinated onto soil treated with different concentration of three salts (NaCl, PbNO3, CuSO4) and their effect was germination rate and other growth parameters of plant. It was found that the plant responded well to the salt stress and in case of NaCl the plant showed the maximum growth followed by PbNO3 and then CuSO4. On an average reduced growth in terms of shoot length, root length, dry and fresh weight was obtained on most of the concentrations of these salt as compared to results obtained in control. However, onto NaCl concentration of 0.005M and 0.01 better growth was attained as compared to control.  After certain period of time the plants become pale yellow in colour from green. Also black colour was observed at the tips of the rice plants treated with PbNO3. Phytochemical screening of these plants was also done which showed the presence of steroids, terpenoids, tannins, flavonoids, alkaloids, and sugar in most of treatments, however on some concentration some of the phytocompounds were found to be reduced or absent.