Constitutive and Inducible Expression of Genes Related to Salicylic Acid and Ethylene Pathways in a Moderately Resistant Tomato Cultivar Leads to Delayed Development of Meloidogyne javanica

Knowledge of the molecular changes in resistant and susceptible cultivars during nematode attack is essential for developing plant resistance. Increased expression genes related to synthesis signaling salicylic acid, jasmonic ethylene known induce defense against parasitic nematodes. Here, we inoculated approximately 3000 s-stage juveniles (J2s) Meloidogyne javanica moderately highly tomato (ALYSTE F-1 Dutch Mobil, respectively) compare developmental disease stages. The roots each cultivar were collected daily until 30 days after inoculation (DAI). stained with acid-fuchsin dissected under a microscope. results showed that few J2s converted J3s at 14 DAI, which time, had highest number J3s. Comparison hormonal pathways two revealed pathway ALYSTE was more strongly upregulated than Mobil DAI. Moreover, acid both decreased not significantly different between regard their non-inoculated controls, respectively, but general constitutively higher levels these compared These suggest constitutive induced pathway, delay development M. F-1.