Abstract
The aim of this study is to investigate the effects of two important factors: light and water availability on the leaf characteristics and the growth of Quercus suber plants. Seedlings of Quercus suber were grown under controlled conditions (greenhouse) with three light treatments (100, 27 and 3 % of incident light, open, shade and deep shade; respectively) and with daily irrigation. Since middle spring, one half of the seedlings were not watered, so we had two water treatments (water and no water) within each light treatment. We studied the photosynthetic response to light (light curves) using an IRGA (infra red gas analyser). Leaves under deep shade showed lower values of light compensation point (LCP), light sa-turation point (LSP), photosynthetic and respiration rates per leaf area (Rarea, Aarea,), N and C content per leaf area (Narea y Carea) than leaves under shade or open. However, leaves under deep shade showed a higher photosynthetic rare per unit dry mass (Amass), specific leaf area (SLA), and N concentration than leaves in shade or full light treatments. Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index. However, the leaves of plants under water limitation showed a higher water use efficiency (WUE). An interesting result was that plants under deep shade. treatment did not show any differences between water and non-watered treatments in physiological traits, possibly indicating a beneficial effect of deep shade on drought resistance. The simulation of carbon balance at leaf level was very well correlated with the relative growth rates (RGR) of seedlings, indicating that the leaf characteristics (variables obtained by the light curves and SLA) may be a good predictor of the relative growth rate under contrasting light and water conditions.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 18
Claim · model-written summary
Deep shade lowered light compensation point (LCP) in Quercus suber leaves versus shade or open light.
- Taxon
- Quercus suber
Quercus subert0 - Treatment
- deep shadee0
- Outcome
- light compensation point (LCP)e0
- Direction
- lowere0
- Comparator
- shade or opene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves under deep shade showed lower values of light compensation point (LCP), light sa-turation point (LSP), photosynthetic and respiration rates per leaf area (Rarea, Aarea,), N and C content per leaf area (Narea y Carea) than leaves under shade or open.”
t0“Quercus suber”
Claim · model-written summary
Deep shade lowered light sa-turation point (LSP) in Quercus suber leaves versus shade or open light.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- deep shadee0
- Outcome
- light sa-turation point (LSP)e0
- Direction
- lowere0
- Comparator
- shade or opene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves under deep shade showed lower values of light compensation point (LCP), light sa-turation point (LSP), photosynthetic and respiration rates per leaf area (Rarea, Aarea,), N and C content per leaf area (Narea y Carea) than leaves under shade or open.”
t0“Quercus suber”
Claim · model-written summary
Deep shade lowered photosynthetic and respiration rates per leaf area (Rarea, Aarea,) in Quercus suber leaves versus shade or open light.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- deep shadee0
- Outcome
- photosynthetic and respiration rates per leaf area (Rarea, Aarea,)e0
- Direction
- lowere0
- Comparator
- shade or opene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves under deep shade showed lower values of light compensation point (LCP), light sa-turation point (LSP), photosynthetic and respiration rates per leaf area (Rarea, Aarea,), N and C content per leaf area (Narea y Carea) than leaves under shade or open.”
t0“Quercus suber”
Claim · model-written summary
Deep shade lowered N and C content per leaf area (Narea y Carea) in Quercus suber leaves versus shade or open light.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- deep shadee0
- Outcome
- N and C content per leaf area (Narea y Carea)e0
- Direction
- lowere0
- Comparator
- shade or opene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves under deep shade showed lower values of light compensation point (LCP), light sa-turation point (LSP), photosynthetic and respiration rates per leaf area (Rarea, Aarea,), N and C content per leaf area (Narea y Carea) than leaves under shade or open.”
t0“Quercus suber”
Claim · model-written summary
Deep shade raised photosynthetic rare per unit dry mass (Amass) relative to shade or full light.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- deep shadee0
- Outcome
- photosynthetic rare per unit dry mass (Amass)e0
- Direction
- highere0
- Comparator
- shade or full light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, leaves under deep shade showed a higher photosynthetic rare per unit dry mass (Amass), specific leaf area (SLA), and N concentration than leaves in shade or full light treatments.”
t0“Quercus suber”
Claim · model-written summary
Deep shade raised specific leaf area (SLA) relative to shade or full light.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- deep shadee0
- Outcome
- specific leaf area (SLA)e0
- Direction
- highere0
- Comparator
- shade or full light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, leaves under deep shade showed a higher photosynthetic rare per unit dry mass (Amass), specific leaf area (SLA), and N concentration than leaves in shade or full light treatments.”
t0“Quercus suber”
Claim · model-written summary
Deep shade raised N concentration relative to shade or full light.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- deep shadee0
- Outcome
- N concentratione0
- Direction
- highere0
- Comparator
- shade or full light treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, leaves under deep shade showed a higher photosynthetic rare per unit dry mass (Amass), specific leaf area (SLA), and N concentration than leaves in shade or full light treatments.”
t0“Quercus suber”
Claim · model-written summary
Water limitation lowered quantum yield in Quercus suber leaves.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- Water limitatione0
- Outcome
- quantum yielde0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index.”
t0“Quercus suber”
Claim · model-written summary
Water limitation lowered LSP in Quercus suber leaves.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- Water limitatione0
- Outcome
- LSPe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index.”
t0“Quercus suber”
Claim · model-written summary
Water limitation lowered photosynthetic and respiration rate (per wilt area or dry mass) in Quercus suber leaves.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- Water limitatione0
- Outcome
- photosynthetic and respiration rate (per wilt area or dry mass)e0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index.”
t0“Quercus suber”
Claim · model-written summary
Water limitation lowered garea in Quercus suber leaves.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- Water limitatione0
- Outcome
- gareae0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index.”
t0“Quercus suber”
Claim · model-written summary
Water limitation lowered N concentration (per unit area or dry rrias) in Quercus suber leaves.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- Water limitatione0
- Outcome
- N concentration (per unit area or dry rrias)e0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index.”
t0“Quercus suber”
Claim · model-written summary
Water limitation lowered photosynthe-tic nitrogen use efficiency (PNUE) in Quercus suber leaves.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- Water limitatione0
- Outcome
- photosynthe-tic nitrogen use efficiency (PNUE)e0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index.”
t0“Quercus suber”
Claim · model-written summary
Water limitation lowered chlorophyll index in Quercus suber leaves.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- Water limitatione0
- Outcome
- chlorophyll indexe0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water limitation induced a lower quantum yield , LSP, photosynthetic and respiration rate (per wilt area or dry mass), garea, N concentration (per unit area or dry rrias). photosynthe-tic nitrogen use efficiency (PNUE) and chlorophyll index.”
t0“Quercus suber”
Claim · model-written summary
Water limitation raised leaf water use efficiency.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- water limitatione0
- Outcome
- water use efficiency (WUE)e0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, the leaves of plants under water limitation showed a higher water use efficiency (WUE).”
t0“Quercus suber”
Claim · model-written summary
Deep-shaded plants showed no physiological trait differences between watered and non-watered treatments.
- Taxon
- Quercus suberQuercus subert0
- Treatment
- water and non-watered treatmentse0
- Outcome
- physiological traitse0
- Direction
- did not show any differencese0
- Qualifier
- deep shadee0
- Comparator
- water and non-watered treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An interesting result was that plants under deep shade. treatment did not show any differences between water and non-watered treatments in physiological traits, possibly indicating a beneficial effect of deep shade on drought resistance.”
t0“Quercus suber”
Claim · model-written summary
Simulated leaf carbon balance correlated well with seedling relative growth rate.
- Taxon
- Quercus suberQuercus subert0
- Organ / stage
- seedlingse0
- Outcome
- relative growth rates (RGR) of seedlingse0
- Qualifier
- very well correlatede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simulation of carbon balance at leaf level was very well correlated with the relative growth rates (RGR) of seedlings, indicating that the leaf characteristics (variables obtained by the light curves and SLA) may be a good predictor of the relative growth rate under contrasting light and water conditions.”
t0“Quercus suber”
Claim · model-written summary
Leaf light-response traits and SLA may predict relative growth rate across light and water conditions.
- Taxon
- Quercus suberQuercus subert0
- Outcome
- good predictor of the relative growth ratee0
- Qualifier
- under contrasting light and water conditionse0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The simulation of carbon balance at leaf level was very well correlated with the relative growth rates (RGR) of seedlings, indicating that the leaf characteristics (variables obtained by the light curves and SLA) may be a good predictor of the relative growth rate under contrasting light and water conditions.”
t0“Quercus suber”
The same questions in other papers
shade · growth · Quercus suber (cork oak)Positive and negative results
1 in the opposite direction
- positive
drought · physiology: pigments · Quercus suber (cork oak)Results agree
2 papers in the same direction as this paper
- negative
- negative
drought · physiology: photosynthesis · Quercus suber (cork oak)Results agree
5 papers in the same direction as this paper
- negative
- negative
- negative
2 papers more in this group
See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.