A team led by the University of Vienna has uncovered how some tropical trees survive drought by shifting carbon dioxide intake to nighttime, using a special form of photosynthesis that keeps their pores closed under the sun to save water.
- Clusia trees take in CO2 at night to reduce daytime water loss.
- Ancient genome duplications and reshuffling created multiple CAM forms.
- Different Clusia species use CAM in unique ways based on environment.
What happened
Researchers at the University of Vienna studied three species of Clusia trees to understand how they survive drought by adjusting their photosynthesis process. These trees possess a special ability to absorb carbon dioxide at night, a process known as CAM photosynthesis, which helps them close their pores during the day and conserve water.
Their genomic analysis revealed that these trees underwent ancient genome duplications followed by millions of years of genetic reorganization. This resulted in a variety of CAM strategies across species—from strong CAM use to stress-induced or hybrid forms—demonstrating a complex evolutionary history rather than a single adaptation event.
Why it feels good
The discovery highlights the incredible adaptability of nature, showing how trees have evolved smart solutions to thrive in challenging environments like tropical drought conditions. Understanding these mechanisms not only breeds appreciation for biodiversity but also inspires new ideas for sustainable agricultural and ecological practices.
Learning that different species within the same genus developed varied strategies underlines nature’s creativity and resilience. It’s encouraging to see how ancient genetic changes can lead to diverse survival tactics, deepening our knowledge of plant biology and evolution.
What to enjoy or watch next
Keep an eye on further research exploring how CAM photosynthesis might be harnessed to improve drought resistance in crops, potentially helping farmers worldwide cope with water scarcity. Observing how genes influence plant behavior in real-world conditions will continue to fuel innovations in botany and ecology.
You can also explore other fascinating examples of how plants adapt to their environments, such as succulents and desert cacti, which employ similar water-saving strategies. Watching documentaries or reading about plant evolution is a great way to appreciate the many ways nature manages to survive and flourish.