Survive or die? A molecular insight into salt-dependant signaling network

摘要: Abstract The response of plants to salt stress involves dynamic changes in growth and signaling leading successful adaptation or death. To elucidate how these opposed events are coordinated we identified a salt-tolerant (obesifruticosa) salt-sensitive (aestiva) Antirrhinum majus mutants using shoots as sensitive indicator magnitude. A series physiological tests were performed that compared the after 6 h 3 days contrasting grown agar under single (200 mM) NaCl concentration, including shoot area, root length, relative water content, plant height, overall biomass accumulation. Additional measurements ABA chlorophyll degradation, ethylene production, net photosynthesis rates Na+, K+, Ca2+, Mg2+ content also reported. RNA-seq analysis was on two 200 mM NaCl. total 9199 transcripts found be differentially expressed treatment mutants. large collection known genes, MAPKs, CDKs, CDPKs, CIPKs, various transcription factors, ion transport proteins, genes involved pathways described detail displayed differential expression profiles. Overall data provided evidences putative osmotic tolerance sensing mechanism through better integration transduction environmental cues into programs. reprogramming calcium-signaling components, generates specific signatures affecting salinity traits, such tissue anion exclusion. Interestingly, hormones may action positive regulators acclimation by modulation their signal pathway.