Summary
Understanding the structure and function of the tissues that transport water and sugars in plants—xylem and phloem—is essential for predicting and managing the future of both agricultural and natural ecosystems and how they respond to stress. Yet, there are large gaps in current knowledge about how these tissues are organized, how they interact, and how they respond during drought. This project will test hypotheses for how the coordinated anatomy and physiology of leaf carbon and water transport determines the growth, drought resilience, and geographic distribution of plant species, for a wide