Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Interactive responses of Quercus suber L. seedlings to light and mild water stress
T2 - effects on morphology and gas exchange traits
AU - Puertolas Simon, Jaime
AU - Pardos, Marta
AU - Jimenez, Maria Dolores
AU - Aranda, Ismael
AU - Pardos, Jose Alberto
PY - 2008/9
Y1 - 2008/9
N2 - The combined effect of water stress and light on seedlings of forest species is a key factor to determine the best silvicultural and afforestation practices in the Mediterranean area. The aims of this work was (1) to determine the optimal light level for the early development of cork oak seedlings under mild water stress and (2) to test if the combined effect of water stress and light followed the trade-off, the facilitation or the orthogonal hypothesis. Shade reduced instantaneous photosynthetic rates and water use efficiency in cork oak. However, seedlings grown under moderate shade (15% of full sunlight) were capable to accumulate similar amount of biomass than those grown under more illuminated environments by increasing their specific leaf area. Absolute differences in net photosynthesis between light treatments were higher in well watered than in water stressed seedlings. However, the impact of both factors on overall growth was orthogonal. We concluded that cork oak development is impaired under deep shade (5% of full sunlight) but it can be optimal under moderate shade ( 15% of full sunlight) even under moderate water stress. Implications of these patterns on regeneration, cultivation and afforestation of cork oak are discussed.
AB - The combined effect of water stress and light on seedlings of forest species is a key factor to determine the best silvicultural and afforestation practices in the Mediterranean area. The aims of this work was (1) to determine the optimal light level for the early development of cork oak seedlings under mild water stress and (2) to test if the combined effect of water stress and light followed the trade-off, the facilitation or the orthogonal hypothesis. Shade reduced instantaneous photosynthetic rates and water use efficiency in cork oak. However, seedlings grown under moderate shade (15% of full sunlight) were capable to accumulate similar amount of biomass than those grown under more illuminated environments by increasing their specific leaf area. Absolute differences in net photosynthesis between light treatments were higher in well watered than in water stressed seedlings. However, the impact of both factors on overall growth was orthogonal. We concluded that cork oak development is impaired under deep shade (5% of full sunlight) but it can be optimal under moderate shade ( 15% of full sunlight) even under moderate water stress. Implications of these patterns on regeneration, cultivation and afforestation of cork oak are discussed.
KW - TRADE-OFFS
KW - cork oak
KW - NURSE PLANTS
KW - ROBUR L
KW - CARBON GAIN
KW - TREE SEEDLINGS
KW - BIOMASS ALLOCATION
KW - shade acclimation
KW - PLANT-COMMUNITIES
KW - NICHE DIFFERENTIATION
KW - photosynthesis rate
KW - foliar anatomy
KW - water use efficiency
KW - WOODY SEEDLINGS
KW - DROUGHT
U2 - 10.1051/forest:2008044
DO - 10.1051/forest:2008044
M3 - Journal article
VL - 65
JO - Annals of Forest Science
JF - Annals of Forest Science
SN - 1286-4560
IS - 6
M1 - ARTN 611
ER -