Hydraulic failure and tree mortality: from correlation to causation

Xylem hydraulic failure has been recognized as a pervasive factor in the triggering of drought-induced tree mortality. However, foundational evidence of the mechanistic link connecting hydraulic failure with living cell damage and tree death has not been identified yet, compromising our ability to predict mortality events. Meristematic cells are involved in the recovery of trees from drought, and focusing on their vitality and functionality after a drought event could provide novel information on the mechanistic link between hydraulic failure and drought induced tree mortality. In this Opinion, we focus on the cell's critical hydration status for tree recovery from drought and how it links with the membrane integrity of the meristems.

Automated summary

Xylem hydraulic failure is a major factor in drought-induced tree mortality, but the mechanistic link between hydraulic failure, living cell damage, and tree death is still unknown. This Opinion article focuses on the importance of meristematic cells in tree recovery from drought and their connection to membrane integrity.