Stomata are tiny pores found on the leaves of plants and are responsible for regulating the exchange of gases, such as carbon dioxide and water vapor. When the stomata are open, carbon dioxide enters the plant and water vapor is released. However, when the stomata are closed, water loss is reduced, but carbon dioxide uptake is also limited.
The research team, led by scientists from the University of Cambridge and the John Innes Centre, identified a protein called SUPPRESSOR OF KT1 (SKT1) that plays a crucial role in controlling the opening and closing of stomata. SKT1 is a member of a family of proteins known as receptor-like kinases (RLKs), which are involved in various signaling pathways in plants.
Using a combination of genetic, biochemical, and imaging techniques, the researchers showed that SKT1 acts as a negative regulator of stomatal opening. When SKT1 is present, the stomata remain closed, preventing water loss. However, when SKT1 is removed or inhibited, the stomata open, allowing for gas exchange.
The researchers also found that SKT1 interacts with another protein called KAT1, which is known to be involved in stomatal movement. This interaction suggests that SKT1 and KAT1 work together to regulate stomatal function.
“Our study reveals the role of SKT1 in controlling stomatal movement and provides insights into the molecular mechanisms underlying stomatal regulation,” said Dr. Eleni Vatsiou, a postdoctoral researcher at the University of Cambridge and the lead author of the study. “Understanding how plants control stomatal behavior is crucial for improving crop performance, particularly in the face of increasing water scarcity and climate change.”
The discovery of SKT1 as a key regulator of stomatal movement opens new avenues for research on plant water use efficiency and carbon dioxide assimilation. Further studies are needed to explore the potential of manipulating SKT1 and related proteins to improve plant performance and resilience in changing environmental conditions.
