摘要：AbstractHeat stress is one of the most serious threats in viticulture. Heat shock transcription factors (HSFs) have been proven to be the most important transcriptional factor family in the plant response to heat. In this study, a total of 19 putativeHSFgenes (VHSFs) were identified from the 12 × Vitis viniferaPinot Noir PN4002 genome, and their chromosomal location, phylogenetic tree, exon-intron structure and conserved motifs were also analyzed. In addition, theseHSFstranscriptional profiles inVitis vinifera‘Jingxiu’ (weak heat tolerance) andVitis davidii‘Tangwei’ (strong heat tolerance) under heat stress (47 °C) and heat acclimation (38 °C) were presented. OnlyVHSF01, VHSF05, VHSF15andVHSF18among 19VHSFsshowed different transcriptional models in these two genotypes under the same treatment, suggesting that these fourVHSFsmay be important factors which result in a thermotolerance difference between ‘Jingxiu’ and ‘Tangwei’. This study provides novel insights into the response of 19VHSFsto heat stress in the grape and suggests that potential keyVHSFsin grape thermotolerance have great implications for molecular breeding in grapes.
