Regulation of petal abscission by JA in Arabidopsis

Timing of petal abscission is controlled by a gene regulatory network. The phytohormones jasmonic acid (JA) plays critical roles in petal abscission through the control of this network. Our preliminary study shows that mutants in regulators of JA biosynthesis and JA signaling display delayed petal abscission. Although those regulators are involved in the petal abscission, differences of the base of petals at cellular levels in wild type and mutants are not characterized in detail. We conducted RNA-seq analysis using JA biosynthesis mutants, dad1 and JA downstream gene mutants, snac septuple mutants to identify differentially expressed genes.