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Water-use efficiency in cork oak (Quercus suber) is modified by the interaction of water and light availabilities

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Water-use efficiency in cork oak (Quercus suber) is modified by the interaction of water and light availabilities. / Aranda, Ismael; Pardos, Marta; Puertolas Simon, Jaime et al.
In: Tree Physiology, Vol. 27, No. 5, 05.2007, p. 671-677.

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Aranda I, Pardos M, Puertolas Simon J, Jimenez MD, Pardos JA. Water-use efficiency in cork oak (Quercus suber) is modified by the interaction of water and light availabilities. Tree Physiology. 2007 May;27(5):671-677. doi: 10.1093/treephys/27.5.671

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Aranda, Ismael ; Pardos, Marta ; Puertolas Simon, Jaime et al. / Water-use efficiency in cork oak (Quercus suber) is modified by the interaction of water and light availabilities. In: Tree Physiology. 2007 ; Vol. 27, No. 5. pp. 671-677.

Bibtex

@article{250574b136534e8683c02a6305e8a99d,
title = "Water-use efficiency in cork oak (Quercus suber) is modified by the interaction of water and light availabilities",
abstract = "We studied the interaction of light and water on water-use efficiency in cork oak (Quercus suber L.) seedlings. One-year-old cork oak seedlings were grown in pots in a factorial experiment with four light treatments (68, 50, 15 and 5% of full sunlight) and two irrigation regimes: well watered (WW) and moderate drought stress (WS). Leaf predawn water potential, which was measured at the end of each of two cycles, did not differ among the light treatments. Water-use efficiency, assessed by carbon isotope composition (delta C-13), tended to increase with increasing irradiance. The trend was similar in the WW and WS treatments, though with lower delta C-13 in all light treatments in the WW irrigation regime. Specific leaf area increased with decreasing irradiance, and was inversely correlated with delta C-13. Thus, changes in delta C-13 could be explained in part by light-induced modifications in leaf morphology. The relationship between stomatal conductance to water vapor and net photosynthesis on a leaf area basis confirmed that seedlings in higher irradiances maintained a higher rate of carbon uptake at a particular stomatal conductance, implying that shaded seedlings have a lower water-use efficiency that is unrelated to water availability.",
keywords = "photosynthesis, uptake, ACER-NEGUNDO, NITROGEN CONCENTRATION, stomatal conductance, CO2 TRANSFER CONDUCTANCE, water potential, SYLVATICA L. SEEDLINGS, carbon isotope composition, drought, LEAF DELTA-C-13, PHYSIOLOGICAL-RESPONSES, specific leaf area, GAS-EXCHANGE, shade, PINUS-SYLVESTRIS L., PHOTOSYNTHETIC CAPACITY, CARBON-ISOTOPE DISCRIMINATION",
author = "Ismael Aranda and Marta Pardos and {Puertolas Simon}, Jaime and Jimenez, {Maria Dolores} and Pardos, {Jose Alberto}",
year = "2007",
month = may,
doi = "10.1093/treephys/27.5.671",
language = "English",
volume = "27",
pages = "671--677",
journal = "Tree Physiology",
issn = "0829-318X",
publisher = "Oxford University Press",
number = "5",

}

RIS

TY - JOUR

T1 - Water-use efficiency in cork oak (Quercus suber) is modified by the interaction of water and light availabilities

AU - Aranda, Ismael

AU - Pardos, Marta

AU - Puertolas Simon, Jaime

AU - Jimenez, Maria Dolores

AU - Pardos, Jose Alberto

PY - 2007/5

Y1 - 2007/5

N2 - We studied the interaction of light and water on water-use efficiency in cork oak (Quercus suber L.) seedlings. One-year-old cork oak seedlings were grown in pots in a factorial experiment with four light treatments (68, 50, 15 and 5% of full sunlight) and two irrigation regimes: well watered (WW) and moderate drought stress (WS). Leaf predawn water potential, which was measured at the end of each of two cycles, did not differ among the light treatments. Water-use efficiency, assessed by carbon isotope composition (delta C-13), tended to increase with increasing irradiance. The trend was similar in the WW and WS treatments, though with lower delta C-13 in all light treatments in the WW irrigation regime. Specific leaf area increased with decreasing irradiance, and was inversely correlated with delta C-13. Thus, changes in delta C-13 could be explained in part by light-induced modifications in leaf morphology. The relationship between stomatal conductance to water vapor and net photosynthesis on a leaf area basis confirmed that seedlings in higher irradiances maintained a higher rate of carbon uptake at a particular stomatal conductance, implying that shaded seedlings have a lower water-use efficiency that is unrelated to water availability.

AB - We studied the interaction of light and water on water-use efficiency in cork oak (Quercus suber L.) seedlings. One-year-old cork oak seedlings were grown in pots in a factorial experiment with four light treatments (68, 50, 15 and 5% of full sunlight) and two irrigation regimes: well watered (WW) and moderate drought stress (WS). Leaf predawn water potential, which was measured at the end of each of two cycles, did not differ among the light treatments. Water-use efficiency, assessed by carbon isotope composition (delta C-13), tended to increase with increasing irradiance. The trend was similar in the WW and WS treatments, though with lower delta C-13 in all light treatments in the WW irrigation regime. Specific leaf area increased with decreasing irradiance, and was inversely correlated with delta C-13. Thus, changes in delta C-13 could be explained in part by light-induced modifications in leaf morphology. The relationship between stomatal conductance to water vapor and net photosynthesis on a leaf area basis confirmed that seedlings in higher irradiances maintained a higher rate of carbon uptake at a particular stomatal conductance, implying that shaded seedlings have a lower water-use efficiency that is unrelated to water availability.

KW - photosynthesis

KW - uptake

KW - ACER-NEGUNDO

KW - NITROGEN CONCENTRATION

KW - stomatal conductance

KW - CO2 TRANSFER CONDUCTANCE

KW - water potential

KW - SYLVATICA L. SEEDLINGS

KW - carbon isotope composition

KW - drought

KW - LEAF DELTA-C-13

KW - PHYSIOLOGICAL-RESPONSES

KW - specific leaf area

KW - GAS-EXCHANGE

KW - shade

KW - PINUS-SYLVESTRIS L.

KW - PHOTOSYNTHETIC CAPACITY

KW - CARBON-ISOTOPE DISCRIMINATION

U2 - 10.1093/treephys/27.5.671

DO - 10.1093/treephys/27.5.671

M3 - Journal article

VL - 27

SP - 671

EP - 677

JO - Tree Physiology

JF - Tree Physiology

SN - 0829-318X

IS - 5

ER -