A Novel Protein from Ectocarpus sp. Improves Salinity and High Temperature Stress Tolerance in Arabidopsis thaliana

Brown alga Ectocarpus sp. belongs to Phaeophyceae, a class of macroalgae that evolved complex multicellularity. is dominant seaweed in temperate regions, abundant mostly the intertidal zones, an environment with high levels abiotic stresses. Previous transcriptomic analysis revealed several genes consistently induced by various stresses; one these Esi0017_0056, which encodes protein unknown function. Bioinformatics analyses indicated encoded Esi0017_0056 soluble and monomeric. The was successfully expressed Escherichia coli,Arabidopsis thaliana Nicotiana benthamiana. In A. gene under constitutive stress inducible promoters led improved tolerance salinity temperature expression key stress-related studied transgenic wild type qPCR. Expression involved ABA-induced tolerance, K+ homeostasis, chaperon activities were significantly up-regulated line. This study first report function gene, highly responsive stresses, thaliana, leading salt stress.