以科技论文语言修改以下内容的语病：Drought occurs in almost all climatic zones of the world especially in arid and semiarid regions Drought stress is a significant threat to plants and a major constraint on grain produ

Drought is a widespread phenomenon that affects nearly all climatic zones, particularly in arid and semiarid regions. Drought stress poses a significant danger to plants and represents a major obstacle to global grain production and quality. The harmful impact of drought stress on photosynthesis, cell elongation, and division results in the disruption of normal metabolic processes and growth, which becomes impossible when water supply to roots is compromised and transpiration rate exceeds the threshold limit. This ultimately leads to plant mortality and a decline in crop yield