Leaf hydraulic safety margin and safety-efficiency trade-off across angiosperm woody species.

ABSTRACT: Leaf hydraulic conductance and the vulnerability to water deficits have profound effects on plant distribution and mortality. In this study, we compiled a leaf hydraulic trait dataset with 311 species-at-site combinations from biomes worldwide. These traits included maximum leaf hydraulic conductance (K_leaf), water potential at 50% loss of K_leaf (P50_leaf), and minimum leaf water potential (Ψ_min). Leaf hydraulic safety margin (HSM_leaf) was calculated as the difference between Ψ_min and P50_leaf. Our results indicated that 70% of the studied species had a narrow HSM_leaf (less than 1 MPa), which was consistent with the global pattern of stem hydraulic safety margin. There was a po

SUBMITTER: Yan CL 

PROVIDER: S-EPMC7728672 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature