The application relates to the field of agricultural
transgenic technology, and particularly discloses GhDBB28 application of a
gene in regulating salt tolerance of upland cotton plants, the
gene GhDBB28 The
nucleotide sequence of the
gene is shown as SEQ ID NO. 1; silencing the gene GhDBB28 increases the salt sensitivity of the upland cotton plants. The application reduces the activity of an
antioxidant system in the upland cotton plants by silencing the gene GhDBB28 , so that the plants are more sensitive to salt stress, and a scientific basis is provided for constructing a transgenic upland cotton
plant with new salt-sensitivity.