PJB-2019-273
The effect of Jasmonic Acid (JA) on gene expression during leaf senescence on Arabidopsis thaliana
Nihal Gören-Sağlam
Abstract
Leaf senescence is an important developmental and well-organized process resulting in many changes in the structure of gene expression. Developmental and environmental signals control leaf senescence. Especially, plant hormones play important roles on regulation of leaf senescence. Jasmonic acid (JA) is a plant growth regulator that effects on a number of processes such as response to abiotic and biotic stress, seed germination, flower development and senescence. In this study, we performed microarray analysis to investigate the role of JA on gene expression during senescence in leaves of Arabidopsis thaliana. We sprayed JA on plants at 3 different time points (27, 31 or 35 DAS). Following spraying, chlorophyll fluorescence of the eighth leaf was measured daily. Our results showed that PSII activity decreased after JA application compared to control. JA treatment of leaves of 27th, 31st and 35th days shows different gene expression responses. After JA application, the expression of the some senescence-related genes increased in the leaves.
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