Progress on the Effect of Drought on Sorghum Growth and Its Response Mechanisms

Abstract

Drought is one of the key factors limiting the increase in crop yields in China and one of the main abiotic stresses affecting the growth and development of sorghum. With currence of global extreme climate become more frequent, the risk of sorghum suffering from drought stress is increasing. Although sorghum (Sorghum bicolor (L.)) is an important food crop, its growth and yield will be significantly affected under abiotic stresses (such as drought, salinity, high temperature and low temperature). Therefore, it is of great significance to study the response mechanism of sorghum drought stress. This study summarized the effects of drought stress on sorghum growth, including the effects of seed germination, leaves and roots. This study summarized the effects of drought stress on sorghum growth, including the effects of seed germination, leaves and roots. The response mechanisms of sorghum to drought stress was discussed from stomatal regulation, osmotic regulation and antioxidant system, and the ways to improve drought resistance of sorghum were prospected, so as to lay a foundation for further study on the morphology, physiological characteristics and molecular mechanism of drought resistance of sorghum and provide theoretical reference for workers engaged in sorghum production and related research.