بررسی تأثیر کاربرد متیل جاسمونات در بهبود مقاومت به شوری از طریق تغییر برخی خصوصیات مورفولوژیک در بابونه آلمانی

To evaluate the effect of spraying with methyl jasmonate on some morphological characters and flower dry weight of chamomile under salt stress an experiment was conducted at greenhouse. The experimental design was as factorial based on a randomized complete block design. Spraying with methyl jasmonate at five levels including, 0, 75, 150, 225 and 300 μM and salt stress applied at four levels including 2.1, 6, 10 and 14 dS/m by adding NaCl to each pots soil. The results showed that spraying with methyl jasmonate and salinity stress had significant effects (P≤ 0.05) on all measured traits. Application of methyl jasmonate in 75 µM and salinity in 6 dS/m leads the highest leaf area, S/R ratio, flower dry weight, length of shoot, biomass, stem diameter, branch numbers. The lowest, root length was recorded in 75 µM and 14 dS/m salinity treatment. According to the results, mild salinity (6dS/m) and low levels of methyl jasmonate in German chamomile had positive effects on morphological traits and flowers performance.