Gas exchange, chlorophyll and nitrogen content of mango leaves as influenced by light environment.
Schaffer B., Gaye G. O.
Author Affiliation: Tropical Research & Education Center, University of Florida, Homestead, FL 33031, USA.
HortScience 24 : 507-509
Abstract : Net CO2 assimilation (A), stomatal conductance for CO2 (gc), water-use efficiency (WUE), specific leaf density (Wa), and leaf chlorophyll and N contents were determined for leaves that developed in full sun and in 25, 50 and 75% shade. Leaf chlorophyll and N contents (DW basis) increased as % shading increased, but WUE and Wa were not significantly affected by shading. Light response curves for A had a steeper initial slope for leaves that developed in full sun and 25% shade than for leaves that developed in 50 and 75% shade. The data indicate a greater quantum-use efficiency for leaves developed in high light levels than for those developed in shade.