المجلة الدولية للعلوم والتقنية

To recognize the validity of plant type for the soils that characterized by high salinity, it is important to study how much the plants suffered from growth rate at different concentration of salt stress. This study was performed on the effect of Indole Butyric Acid (IBA) on the growth of Vicia Faba plant under two different concentration (4 gm & 9 gm) of sodium chloride and the control treatment without (IBA and NaCl2). Shoot and root length were effectively improved under the thedifferent levels of indole 3 acetic acid .The data regarding root length are showed that the length of root is significantly affected by IBA at the two different levels comparing with the control sample of distilled water. The values show that maximum root length at R1 (13.2 cm) for the treated samples at concentration (4 gm), while (4.5 cm) for untreated samples. On the other hand, R3 display different values, whereas, it was (12.4 cm) for treated samples and (7.5 cm) for untreated samples. At the concentration (9 gm) seams to more affected by salt stresses, whereas, the root length was (10.9 cm) and (6.3 cm) for treated and untreated samples respectively. Also, it is obviously that the number of lateral roots have been affected by the salty stresses. The obtained results reflect this affecting, whereas, R1, R2 and R3 showing variable values for the two concentration levels (4 & 9 gm) for both treated and untreated samples. The values are (15 & 12), (16& 10), (14 & 13) and (19 & 9), (14 & 11) and (12 & 8) respectively. The obtained measurements exhibit more or less the same behavior of leaves lengths. Whereas, the plants more affected at high concentration (9 gm) comparing with concentration (4 gm). The highest value was recorded at R2 (2.6 cm) for the treated sample (4 gm). From the obtained results it is observed that, the salinity at different concentration causes clear decreasing in the plant growth for the investigated samples. The changing of measurements parameters mainly related to the nature of soil salinity. The results exhibit a wide variation of these parameters for both treated and untreated samples. Plant growth strongly affected at high concentration of salt stresses (9 gm). The increasing of salinity in the soil may be leads to the increase of accumulation in plant tissues which affected negatively on growth rate.