The Mechanisms of Heat Shock Transcription Factors(HSF)Regulating Plant Response to Abiotic Stress
Heat shock transcription factor(HSF),widely found in eukaryotes,are one of the most cru-cial transcriptional factors families in the plant resistance to heat stress.HSF has highly conserved DNA-binding domain(DBD),which is involved in complex stress signal transduction and response networks.HSF,as a terminal component of the signal transduction chain,mediated the expression of target genes under abiotic stress.In response to stress,HSF is phosphorylated and ubiquitinated by upstream protein kinases or binds to heat shock elements(HSEs)through ABA signaling pathway to regulate the expression of downstream genes such as heat shock proteins(HSPs),thereby improving plant stress resistance.In this study,the discovery,structure,classification,regulatory mechanism of HSF and its role in plant response to abiotic stress(extreme temperature,drought,high salinity,heavy metal,et al.)were reviewed,and the future research direction was expected to provide theoretical basis and gene resources for the genetic improvement of crop and forage stress resistance.
Heat shock transcription factorsAbiotic stressRegulatory mechanismPhosphoryla-tionHeat shock elements
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