Physiological Response of Eruca sativa Plant Growing in soil Contaminated.

Abstract

Two experiments carried out in department of biology in University of Mustansiriya to study  response of Eruca sativa L plant planted in soil contaminated . The first experiment  included planting seeds in pitre dish that watered by water treated with heavy metal  . The second experiment included planted in soil contaminated by, Cr, Ni , Al,  and  Pb, with three  concentrations (0.01, 0.1, 1) mg/L . The results of the statistical analysis indicated that were significant differences, with registered highest germination percentage  83% %  with treatment by Cr at a concentration of 0.01 mg/L. While  lowest germination percentage was recorded  63.3% with  treatment by  Ni, at  concentration  0.01 mg/l, compared with the control treatment  which recorded 76.6%.The results of the statistical analysis showed that the element aluminum has an effect on the fresh weight of the shoot group, and that the highest average fresh weight of the shoot group achieved significant differences recorded (20.78) gm for the T4P1 treatment, and the lowest fresh weight of the shoot group achieved a significant difference recorded (18.20) gm for the treatment T4P3 compared to the treatment control T0P0. The results of the statistical analysis indicated that the highest fresh weight of the root under the influence of aluminum was (1.7) gm for the treatment T4P2 and the lowest fresh weight of the root was recorded (1.0) gm for the treatment T4P3, it did not reach the significant limits compared with the control factor, which recorded 2.0 gm. Aluminum affects root growth and inhibits the formation of secondary roots by inhibiting some acids such as salicylic acid.