Abstract
The Brazilian Cerrado is a mosaic comprised of different vegetation formations and consequently, different environmental conditions. Tree density modifies the availability of light and affects species distribution. Thus, seedlings of species with a broad distribution should show contrasting anatomical, morphological, and physiological traits depending on environmental conditions, and this should account for a higher phenotypic plasticity as part of their survival strategies. Our aim was to investigate the ability of Dalbergia miscolobium, a widespread species in the Cerrado, to modify physiological, allometric, and anatomical traits under full sunlight and shade conditions. In a shade environment, D. miscolobium had increased tree height, number of leaves, chlorophyll content, and specific leaf area; in full sun, nett photosynthesis, stomatal conductance, transpiration, and leaf thickness increased. Also, root-to-shoot ratio (R:S ratio) was ∼70% greater in the full sun than the shade. A high relative distance phenotypic index, which quantifies phenotypic plasticity by the relative distance among the individual traits, was observed for R:S ratio (0.37), indicating the ability of D. miscolobium to change its biomass allocation in different environments. The contrasts in the studied traits under the two light conditions may be related to changes in carbon investment with light availability. This phenotypic plasticity may explain the broad distribution of D. miscolobium.
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Claims 5
Claim · model-written summary
Shade increased height, leaf number, chlorophyll content and specific leaf area.
- Taxon
- Dalbergia miscolobium
Dalbergia miscolobiume0 - Treatment
- shade environmente1
- Outcome
- tree height, number of leaves, chlorophyll content, and specific leaf areae1
- Direction
- increasede1
- Comparator
- full sune1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dalbergia miscolobium”
e1“In a shade environment, D. miscolobium had increased tree height, number of leaves, chlorophyll content, and specific leaf area; in full sun, nett photosynthesis, stomatal conductance, transpiration, and leaf thickness increased.”
Claim · model-written summary
Full sun increased net photosynthesis, stomatal conductance and transpiration.
- Taxon
- Dalbergia miscolobiumDalbergia miscolobiume0
- Treatment
- full sune1
- Outcome
- nett photosynthesis, stomatal conductance, transpiratione1
- Direction
- increasede1
- Comparator
- shade environmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dalbergia miscolobium”
e1“In a shade environment, D. miscolobium had increased tree height, number of leaves, chlorophyll content, and specific leaf area; in full sun, nett photosynthesis, stomatal conductance, transpiration, and leaf thickness increased.”
Claim · model-written summary
Full sun increased leaf thickness.
- Taxon
- Dalbergia miscolobiumDalbergia miscolobiume0
- Treatment
- full sune1
- Outcome
- leaf thicknesse1
- Direction
- increasede1
- Comparator
- shade environmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dalbergia miscolobium”
e1“In a shade environment, D. miscolobium had increased tree height, number of leaves, chlorophyll content, and specific leaf area; in full sun, nett photosynthesis, stomatal conductance, transpiration, and leaf thickness increased.”
Claim · model-written summary
Root-to-shoot ratio was about 70% greater in full sun than shade.
- Taxon
- Dalbergia miscolobiumDalbergia miscolobiume0
- Treatment
- full sune1
- Outcome
- root-to-shoot ratioe1
- Direction
- greatere1
- Value
- ∼70%e1
- Comparator
- shadee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dalbergia miscolobium”
e1“root-to-shoot ratio (R:S ratio) was ∼70% greater in the full sun than the shade.”
Claim · model-written summary
The relative distance phenotypic index was high for root-to-shoot ratio at 0.37.
- Taxon
- Dalbergia miscolobiumDalbergia miscolobiume0
- Outcome
- relative distance phenotypic indexe1
- Direction
- highe1
- Value
- 0.37e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dalbergia miscolobium”
e1“A high relative distance phenotypic index, which quantifies phenotypic plasticity by the relative distance among the individual traits, was observed for R:S ratio (0.37)”