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 - Water relations of cork oak (Quercus suber L.) seedlings in response to shading and moderate drought
AU - Pardos, Marta
AU - Jimenez, M. Dolores
AU - Aranda, Ismael
AU - Puertolas Simon, Jaime
AU - Pardos, José A.
PY - 2005/7
Y1 - 2005/7
N2 - The interactive effects of light and drought on water relations and soluble sugars were addressed on Quercus suber L. seedlings grown under the combination of four irradiances and two soil water contents. Leaf water potentials at predawn and midday were lower for water stressed seedlings, independently of light environment. Osmotic potentials at full (Psi pi(100)) and zero turgor (Psi pi(100)) decreased with drought, under the four light treatments. However, the decline was greater with the development of water stress under the two treatments of higher light availability. The higher soluble sugar concentrations in seedlings grown under higher irradiances provoked a decrease of Psi pi(0). The decrease in Psi pi(0) and Psi pi(0) in moderate stressed seedlings was accompanied by an increase in epsilon(max). The lower ability for osmotic adjustment in seedlings grown under moderate water stress and low light environment suggested a lower efficiency in developing physiological mechanisms for drought tolerance in shade- grown seedlings.
AB - The interactive effects of light and drought on water relations and soluble sugars were addressed on Quercus suber L. seedlings grown under the combination of four irradiances and two soil water contents. Leaf water potentials at predawn and midday were lower for water stressed seedlings, independently of light environment. Osmotic potentials at full (Psi pi(100)) and zero turgor (Psi pi(100)) decreased with drought, under the four light treatments. However, the decline was greater with the development of water stress under the two treatments of higher light availability. The higher soluble sugar concentrations in seedlings grown under higher irradiances provoked a decrease of Psi pi(0). The decrease in Psi pi(0) and Psi pi(0) in moderate stressed seedlings was accompanied by an increase in epsilon(max). The lower ability for osmotic adjustment in seedlings grown under moderate water stress and low light environment suggested a lower efficiency in developing physiological mechanisms for drought tolerance in shade- grown seedlings.
KW - cork oak
KW - PINUS-SYLVESTRIS
KW - soluble sugars
KW - LIGHT
KW - ROBUR L
KW - MEDITERRANEAN EVERGREEN SCLEROPHYLLS
KW - POPLAR SEEDLINGS
KW - drought
KW - SOIL FERTILITY
KW - osmotic adjustment
KW - GROWTH
KW - PRESSURE-VOLUME CURVES
KW - GAS-EXCHANGE
KW - light
KW - OSMOTIC ADJUSTMENT
U2 - 10.1051/forest:2005033
DO - 10.1051/forest:2005033
M3 - Journal article
VL - 62
SP - 377
EP - 384
JO - Annals of Forest Science
JF - Annals of Forest Science
SN - 1286-4560
IS - 5
ER -