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The Relationship Between VPD and Plant Stress

Earth is experiencing a global increase in atmospheric vapor pressure deficit (VPD) due to climate change. This increase in VPD has been associated with productivity decreases in ecosystems and yield penalties in crops. The primary cause of these losses is decreased stomatal conductance, which limits photosynthesis. However, research suggests that stomatal acclimation to VPD plays a crucial role in determining plant productivity under high VPD. Elevated VPD can also have complex effects on plant physiology at the anatomical, biochemical, and developmental levels. These effects can vary across species and impact yield, primary productivity, leaf anatomy, nutrient and hormonal status, reproductive development, and architecture and growth rates. Understanding the relationship between VPD and plant stress is essential for mitigating the effects of climate change on ecosystems and agricultural systems.

Key Takeaways:

  • VPD is increasing globally due to climate change, leading to decreased productivity in ecosystems and crops.
  • Stomatal acclimation to VPD plays a crucial role in…