The application discloses application of a CsERF017
gene or a
protein coded by the same in regulation of resistance of
navel orange fruits to sour rot, and belongs to the technical field of
molecular biology and fruit and vegetable preservation. A
nucleotide sequence of the CsERF017
gene is shown in SEQ ID NO. 2, and an
amino acid sequence of the
protein coded by the same is shown in SEQ ID NO. 3. The application finds through experiments that the CsERF017
gene is up-regulated after infection of a citrus sour rot
pathogen Geotrichum candidum, and silencing or knocking out the CsERF017 gene can enhance the resistance of
navel orange fruits to sour rot, and the specific performance is that, compared with a control, the transgenic fruits after
inoculation of the G. candidum have reduced symptoms of sour rot, and both a
disease index and a TA content are reduced. The application provides an important
gene bank and new insights for breeding of citrus
disease-resistant varieties and development of molecular markers, and is helpful to fundamentally reduce the dependence on chemical synthetic pesticides in
postharvest preservation treatment of citrus fruits.