Effects of salt stress on soluble protein and proline content of Almond Rootstocks

Three almond rootstocks( stone almond, A.commans persicoides, A.Persica) were experimental materials and stressed under NaCl.The results showed that soluble protein content in stone almond leaves was firstly increased and then decreased slightly by 5,10 after 20 days. After 20 days, the range of decrease of soluble protein content in stone almond leaves was very high.The proline content in leaves increased with the strengthening of salt stress. After 5 and 10 days, proline content was the highest while salt stress was 350 mmol/L. After 20 days, its content slightly decreased in every treatment area and when salt stress was 350 mmol/L the plant died, because of the longer treatment days and higher salt stress. Soluble protein content in A.commans.persicoides leaves was firstly increased and then decreased slightly with the strengthening of salt stress after 5 and 10 days.Its content was the highest as salt stress was (300 mmol/L.) After 20 days, with the strengthening of salt stress its content slightly decreased. It is explained that A.commans persicoides responds salt stress after a while. The proline content in A. commans persicoides leaves increased with the strengthening of salt stress after 5, 10 and 20days,and its content was the highest as salt stress was 350 mmol/L. soluble protein content in A. Persica leaves was firstly increased and then decreased slightly after 5days,after 10 and 20days soluble protein content slightly went down.But there was no more difference in the soluble protein content of leaves and balance was kept. The proline content in A. persica leaves increased with the strengthening of salt stress by 5,10 after 20days and proline content was the highest as salt stress was 350 mmol/L,and its accumulation was higher than that of other two almond rootstocks and every treatment area of its content increased by 18.6,9.16 and 18.1 times compared with the control. It is explained that the proline content increased while protein reached balance.The results were suggested that A.persica has ability of salt tolerance. .commanspe eavesincreas stassaltstre