Figure 4. Relationship between δD biases (i.e. Cavitron-derived xylem water versus CVD-derived bulk stem water) and δD offsets (i.e. source water versus CVD-derived bulk stem water) with δDxylem(A,D), Ψpre-dawn (B,E) and RSWC (C,F). δDxylem is the δD of xylem water as measured via Cavitron extraction, Ψpre-dawn is the pre-dawn leaf water potential, and RSWC is the relative stem water content.