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Can CO2 enrichment modify the effect of water and high light stress on biomass allocation and relative growth rate of cork oak seedlings?

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Can CO2 enrichment modify the effect of water and high light stress on biomass allocation and relative growth rate of cork oak seedlings? / Pardos, Marta; Puertolas Simon, Jaime; Aranda, Ismael; Pardos, J. A.

In: Trees, Vol. 20, No. 6, 11.2006, p. 713-724.

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@article{b95254b059f949d6a81c98fb641c3642,
title = "Can CO2 enrichment modify the effect of water and high light stress on biomass allocation and relative growth rate of cork oak seedlings?",
abstract = "To test whether the impact of an enriched-CO2 environment on the growth and biomass allocation of first-season Quercus suber L. seedlings can modify the drought response under shade or sun conditions, seedlings were grown in pots at two CO2 concentrations x two watering regimes x two irradiances. Compared to CO2, light and water treatment had greater effects on all morphological traits measured (height, stem diameter, number of leaves, leaf area, biomass fractions). Cork oak showed particularly large increases in biomass in response to elevated CO2 under low-watered (W-) and high-illuminated conditions (L+). Allocation shifted from shoot to root under increasing irradiance (L+), but was not affected by CO2. Changes in allocation related to water limitation were only modest, and changed over time. Relative growth rate (RGR) and net assimilation rate (NAR) were significantly greatest in the L+/W+ treatment for both CO2 concentrations. Changes in RGR were mainly due to NAR. Growth responses to increased light, water or CO2 were strongest with light, medium with water availability and smallest for CO2, in terms of RGR. The rise in NAR for light and water treatments was counterbalanced by a decrease in SLA (specific leaf area) and LMF (leaf mass fraction). Results suggest that elevated CO2 caused cork oak seedlings to improve their performance in dry and high light environments to a greater extent than in well-irrigated and low light ones, thus ameliorating the effects of soil water stress and high light loads on growth.",
keywords = "ATMOSPHERIC CARBON-DIOXIDE, LEAF-AREA, CO2 concentration, Quercus suber, morphological traits, RESPONSES, irradiance, SOUR ORANGE TREES, growth analysis, FIELD EXPERIMENTS, allometric analysis, SUBER L. SEEDLINGS, DEEP SHADE, water regime, SOIL-MOISTURE, DROUGHT, ELEVATED CO2",
author = "Marta Pardos and {Puertolas Simon}, Jaime and Ismael Aranda and Pardos, {J. A.}",
year = "2006",
month = nov
doi = "10.1007/s00468-006-0086-y",
language = "English",
volume = "20",
pages = "713--724",
journal = "Trees",
issn = "0931-1890",
publisher = "Springer Verlag",
number = "6",

}

RIS

TY - JOUR

T1 - Can CO2 enrichment modify the effect of water and high light stress on biomass allocation and relative growth rate of cork oak seedlings?

AU - Pardos, Marta

AU - Puertolas Simon, Jaime

AU - Aranda, Ismael

AU - Pardos, J. A.

PY - 2006/11

Y1 - 2006/11

N2 - To test whether the impact of an enriched-CO2 environment on the growth and biomass allocation of first-season Quercus suber L. seedlings can modify the drought response under shade or sun conditions, seedlings were grown in pots at two CO2 concentrations x two watering regimes x two irradiances. Compared to CO2, light and water treatment had greater effects on all morphological traits measured (height, stem diameter, number of leaves, leaf area, biomass fractions). Cork oak showed particularly large increases in biomass in response to elevated CO2 under low-watered (W-) and high-illuminated conditions (L+). Allocation shifted from shoot to root under increasing irradiance (L+), but was not affected by CO2. Changes in allocation related to water limitation were only modest, and changed over time. Relative growth rate (RGR) and net assimilation rate (NAR) were significantly greatest in the L+/W+ treatment for both CO2 concentrations. Changes in RGR were mainly due to NAR. Growth responses to increased light, water or CO2 were strongest with light, medium with water availability and smallest for CO2, in terms of RGR. The rise in NAR for light and water treatments was counterbalanced by a decrease in SLA (specific leaf area) and LMF (leaf mass fraction). Results suggest that elevated CO2 caused cork oak seedlings to improve their performance in dry and high light environments to a greater extent than in well-irrigated and low light ones, thus ameliorating the effects of soil water stress and high light loads on growth.

AB - To test whether the impact of an enriched-CO2 environment on the growth and biomass allocation of first-season Quercus suber L. seedlings can modify the drought response under shade or sun conditions, seedlings were grown in pots at two CO2 concentrations x two watering regimes x two irradiances. Compared to CO2, light and water treatment had greater effects on all morphological traits measured (height, stem diameter, number of leaves, leaf area, biomass fractions). Cork oak showed particularly large increases in biomass in response to elevated CO2 under low-watered (W-) and high-illuminated conditions (L+). Allocation shifted from shoot to root under increasing irradiance (L+), but was not affected by CO2. Changes in allocation related to water limitation were only modest, and changed over time. Relative growth rate (RGR) and net assimilation rate (NAR) were significantly greatest in the L+/W+ treatment for both CO2 concentrations. Changes in RGR were mainly due to NAR. Growth responses to increased light, water or CO2 were strongest with light, medium with water availability and smallest for CO2, in terms of RGR. The rise in NAR for light and water treatments was counterbalanced by a decrease in SLA (specific leaf area) and LMF (leaf mass fraction). Results suggest that elevated CO2 caused cork oak seedlings to improve their performance in dry and high light environments to a greater extent than in well-irrigated and low light ones, thus ameliorating the effects of soil water stress and high light loads on growth.

KW - ATMOSPHERIC CARBON-DIOXIDE

KW - LEAF-AREA

KW - CO2 concentration

KW - Quercus suber

KW - morphological traits

KW - RESPONSES

KW - irradiance

KW - SOUR ORANGE TREES

KW - growth analysis

KW - FIELD EXPERIMENTS

KW - allometric analysis

KW - SUBER L. SEEDLINGS

KW - DEEP SHADE

KW - water regime

KW - SOIL-MOISTURE

KW - DROUGHT

KW - ELEVATED CO2

U2 - 10.1007/s00468-006-0086-y

DO - 10.1007/s00468-006-0086-y

M3 - Journal article

VL - 20

SP - 713

EP - 724

JO - Trees

JF - Trees

SN - 0931-1890

IS - 6

ER -