TY - JOUR
T1 - Physiological characteristics of acacia auriculiformis A. Cunn. ex Benth., acacia mangium willd. and pterocarpus indicus willd. In the la mesa watershed and Mt. Makiling, Philippines
AU - Combalicer, Marilyn S.
AU - Lee, Don Koo
AU - Woo, Su Young
AU - Hyun, Jung Oh
AU - Park, Yeong Dae
AU - Lee, Yong Kwon
AU - Combalicer, Edwin A.
AU - Tolentino, Enrique L.
PY - 2012
Y1 - 2012
N2 - The physiological responses of nitrogen-fixing species (Acacia auriculiformis A.Cunn. ex Benth., Acacia mangium Willd. and Pterocarpus indicus Willd.) were determined using 2-year-old, 10-year-old and 20-year-old age classes. Parameters obtained were stomata size and number, leaf anatomical characteristics, total leaf nitrogen and carbon concentrations, net photosynthesis rate (PN), photosynthetic nitrogen utilization efficiency (PNUE), transpiration rate (E), stomatal conductance (gs), water use efficiency (WUE), net CO2 assimilation rate vs calculated internal CO2 concentrations (A/Ci curve), rate of maximum Rubisco carboxylation (Vcmax) and photosynthetic photon flux density saturated rate of maximum electron transport (Jmax). In all the studied species and age classes, significant differences in PN were observed (p<0.001) and was higher in 20-yr-old A. mangium (12.4 μmol CO2 m-2 s-1) and A. auriculiformis (11.5 μmol CO2 m-2 s-1). Also, PNUE, gs, and WUE were significantly higher (p<0.050) in 20-yr-old A. auriculiformis (4.57 μmol g-1 s-1, 0.71 mol H2O m-2 s-1, and 7.71 CO2 m-2 s-1/mmol H2O m-2 s-1, respectively) and A. mangium (5.93 μmol g-1 s-1, 0.86 mol H2O m-2 s-1, and 7.94 μmol CO2 m-2 s-1/mmol H2O m-2 s-1, respectively). A. auriculiformis and A. mangium showed better physiological attributes, which could be important features for species to be used for rehabilitating degraded areas of the country.
AB - The physiological responses of nitrogen-fixing species (Acacia auriculiformis A.Cunn. ex Benth., Acacia mangium Willd. and Pterocarpus indicus Willd.) were determined using 2-year-old, 10-year-old and 20-year-old age classes. Parameters obtained were stomata size and number, leaf anatomical characteristics, total leaf nitrogen and carbon concentrations, net photosynthesis rate (PN), photosynthetic nitrogen utilization efficiency (PNUE), transpiration rate (E), stomatal conductance (gs), water use efficiency (WUE), net CO2 assimilation rate vs calculated internal CO2 concentrations (A/Ci curve), rate of maximum Rubisco carboxylation (Vcmax) and photosynthetic photon flux density saturated rate of maximum electron transport (Jmax). In all the studied species and age classes, significant differences in PN were observed (p<0.001) and was higher in 20-yr-old A. mangium (12.4 μmol CO2 m-2 s-1) and A. auriculiformis (11.5 μmol CO2 m-2 s-1). Also, PNUE, gs, and WUE were significantly higher (p<0.050) in 20-yr-old A. auriculiformis (4.57 μmol g-1 s-1, 0.71 mol H2O m-2 s-1, and 7.71 CO2 m-2 s-1/mmol H2O m-2 s-1, respectively) and A. mangium (5.93 μmol g-1 s-1, 0.86 mol H2O m-2 s-1, and 7.94 μmol CO2 m-2 s-1/mmol H2O m-2 s-1, respectively). A. auriculiformis and A. mangium showed better physiological attributes, which could be important features for species to be used for rehabilitating degraded areas of the country.
KW - Acacia auriculiformis
KW - Acacia mangium
KW - Exotic species
KW - Fast growing
KW - Nitrogen-fixing trees
KW - Physiological characteristics
KW - Pterocarpus indicus
KW - Rehabilitation
UR - http://www.scopus.com/inward/record.url?scp=84863714540&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:84863714540
SN - 0119-1144
VL - 15
SP - 14
EP - 28
JO - Journal of Environmental Science and Management
JF - Journal of Environmental Science and Management
IS - SUPPL.1
ER -