Overexpression of () Cotton Gene Enhances Drought, Salt, and Oxidative Stress Tolerance in .

Upland cotton ( L.) is the main natural fiber crop worldwide and is an essential source of seed oil and biofuel products. Many abiotic stresses, such as drought and salinity, constrain cotton production. Thioredoxins (TRXs) are a group of small ubiquitous proteins that are widely distributed among organisms. TRXs play a crucial role in regulating diverse functions during plant growth and development. In the present study, a novel gene was characterized and overexpressed in and silenced in cotton under drought stress. Furthermore, the proline content and enzyme activity levels were measured in transgenic plants and wild-type (Wt) plants under drought and salt stress. The results revealed that the overexpression of enhanced abiotic stress tolerance. When was silenced, cotton plants become more sensitive to drought. Taken together, these findings confirmed that the overexpression of improved drought and salt tolerance in plants. Therefore, the gene can be transformed into cotton plants to obtain transgenic lines for more functional details.