regulates photosynthesis-related genes in an intertidal macroalgae, under stress.

Intertidal macroalgae are important research subjects in stress biology. Basic region-leucine zipper transcription factors (bZIPs) play an important regulatory role in the expression of target genes under abiotic stress. We herein identified a bZIP2 gene to regulate abiotic stress tolerance in , a representative intertidal macroalgal species. Cloning and sequencing of the cDNA characterized a BRLZ structure and an α coiled-coil structure between amino acids and Expression of was detected to upregulate under both high temperature and salt stresses. A DAP-seq analysis revealed the -binding motifs of (T/C)TCCA(C/G) and A (A/G)AAA (G/A), which differed from the conserved motifs in plants. Overexpression of was indicative of a high temperature and salt stress tolerances in transgenic . It was suggested that was probably involved in regulating expression of the photosynthetic-related genes and the response to the abiotic stresses in , which provide new insights for elucidating efficient adaptation strategies of intertidal macroalgae.