Jasmonic acid-amido synthetase (JAR1)

A higher redness of strawberry fruit skin and anthocyanin content in MeJA-treated fruits with respect to Jarin-1-treated ones concomitant with an upregulation of FaANS and FaUFGT genes is found. Inversely, the proanthocyanidin (PA) content was higher in Jarin-1- and MeJA + Jarin-1-treated than in MeJA-treated fruits. MeJA + Jarin-1 treatment resulted in an upregulation of FaANR and associated transcription factors such as FabHLH33 and FaMYB9/11 along with FaJMT and FaJAR1.2 . JA-responsive elements in the promoter regions of FaMYB1/9/10/11 genes is found. PA biosynthesis-related genes can be upregulated by the application of Jarin-1 to MeJA-treated fruit, thus increasing PA accumulation in strawberry.