PLANT BIOSYSTEMS, cilt.1, ss.1-13, 2024 (SCI-Expanded)
Endoplasmic reticulum (ER) stress is a cellular condition induced by environmental stressors.Transcriptomic approaches reveal the response of plants to ER stress and provide a broadened view.Tomato plants were treated with tunicamycin, and total RNA isolated from the tomato leaves wassequenced on an RNA-sequencing platform to be analyzed for differential expressions. A total of 856differentially expressed genes (DEGs) were discovered in tunicamycin-treated tomato leaves. Upregulationof ER stress marker gene expressions was detected after 2h, while a prolonged ER stress downregulatedmost of the protein-coding genes. Pathways such as: response to stress, jasmonic acid mediatedsignaling, signal transduction regulation, plant hormone signal transduction, and protein processing inER were enriched. Prolonged stress mostly resulted in reduced transcript levels, possibly related to amechanism functioning to lower the load of nascent transcripts in the ER. Our findings emphasize thekey role of JA-regulated signaling in tomato ER stress responses due to the differential expressions ofthe pathway components, along with other plant hormones and signaling-related or regulatory genes.ER stress being a common response to many stressors in plants, transcriptome data obtained here willprovide for further studies of understanding plant stress tolerance or generating stress-resistant tomatoplants.