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Banana ( Musa acuminata ) is one of the most popular fresh fruits. However, the rapid spread of fungal pathogen  Fusarium oxysporum  f. sp. cubense ( Foc ) in tropical areas severely affected banana growth and production. Thus, it is very important to identify candidate genes involved in banana response to abiotic stress and pathogen infection, as well as the molecular mechanism and possible utilization for genetic breeding. Heat stress transcription factors (Hsfs) are widely known for their common involvement in various abiotic stresses and plant-pathogen interaction. However, no  MaHsf  has been identified in banana, as well as its possible role. In this study, genome-wide identification and further analyses of evolution, gene structure and conserved motifs showed closer relationship of them in every subgroup. The comprehensive expression profiles of  MaHsfs  revealed the tissue- and developmental stage-specific or dependent, as well as abiotic and biotic stress-responsive expressions of them. The common regulation of several  MaHsfs  by abiotic and biotic stress indicated the possible roles of them in plant stress responses. Taken together, this study extended our understanding of  MaHsf  gene family and identified some candidate  MaHsfs  with specific expression profiles, which may be used as potential candidates for genetic breeding in banana.

Heat shock transcription factors in banana: genome-wide characterization and expression profile analysis during development and stress response