The effects of sodium nitroproside and salicylic acid on some physiological characteristis of Melia azedarach under salinity conditions

In this research، effects of Sodium NitroProside (SNP) and Salicylic Acid (SA) on some physilogical characteristics of Melia azedarach under salinity conditions were studied. Thus، a factorial experiment was conducted using a randomized complete block design with three replicates. Results showed that amount of proline and sugar in root and leaves significantly increased with increasing salinity. As a result، stem proline in concentration of 20 ds/m increased to 13 times more than control and application of SA and SNP decreased amounts of proline in this salinity concentration. The amount of solouble sugar in roots and leaves significantly increased with increasing salinity in concentration of 20 ds/m and application of SA and SNP decreased amounts of sugar. In contrast، K significantly decreased in leaves and roots. The amount of chlorophyl significantly decreased in concentration of 10 and 20 ds/m with increasing salinity. Application of SA did not change the amount of chlorophyl but SNP increased leaves chlorophyl. Increase in salinity also significantly decreased dry weight of root.