Investigation of the effect of SA (Salicylic Acid) application on gene expression during leaf senescence in Arabidopsis thaliana

Leaf senescence is an important developmental process controlled by many internal and external factors. The effects of internal factors, especially hormones on leaf senescence is very important. Salicylic Acid (SA) is an important plant growth regulator known to promote senescence and it is involved in plant defense mechanism. In this study, the effect of SA on leaf senescence was investigated in terms of gene expression. For this purpose, salicylic acid was applied to the leaves of Arabidopsis thaliana on the 27th, 31st and 35th days and fluorescence changes were determined daily. In order to determine gene expression, microarray analysis was performed in the 8th leaves harvested 4 hours after the applications. The data obtained reveal the changes of SA in gene expression during senescence