تأثیر مقادیر مختلف کود پتاسیم و تنش خشکی بر تجمع پرولین و برخی صفات مورفولوژیک در گیاه کتان روغنی(Linum ustitatissimum L.)

In order to evaluate the effect of potassium fertilizer under drought stress conditions on proline accumulation and physiological characteristics of linseed, a field experiment was conducted as split-plot in randomized complete block design (RCBD) with three replications in the research station of Shahrekord University. Main plot include four irrigations after 50, 70, 100 and 130 mm evaporation from pan class A and sub-plot include three levels of 0, 150 and 250 kg/ha potassium fertilizers. The result showed that irrigation regimes significantly affected on the proline percentage and increased as drought stress increased. Beside, maximum proline produced in 250 kg/ha potassium fertilizer and between 0 and 150 kg/ha potassium fertilizer treatment did not significantly differences. The results in this experiment showed that as increased drought stress, traits of plant height, stem diameter, stem branch number and leaf number decreased significantly. The minimum amount of these traits was observed in mild stress condition (150 mm evaporation of pan class A)