Abstract
Eucalyptus plantations in Brazil cover approximately 5,7 million hectares and are distributed from 0O to 32O S, covering a wide range of climatic conditions. To develop adapted genotypes to this climatic gradient, breeding programs use species with different leaf anatomic, morphologic and structural traits. We selected 16 highly planted Eucalyptus genotypes (E.grandis, E.urophylla, E.camaldulensis, E.saligna, pure and hybrids, clonal and seed-origin) across different regions in Brazil, and grew them at a single location to assess their genotypic variability in leaf structure, anatomy and morphology, and how these leaf traits may be related to strategies to cope with environmental conditions. Most genotypes exhibited similar leaf anatomy, with about 5% of leaf thickness constituted of cuticles, 11% of epidermis, 26% of palisade parenchyma, and 58% of spongy parenchyma. The only exception was the clone E.grandis x E.camaldulensis, with no spongy parenchyma and thick palisade parenchyma (84% of the leaf thickness). The clones had hypostomatic leaves, except two genotypes with amphistomatic leaves (E.grandis x E.camaldulensis and E.grandis). Significant relationships were found between leaf inclination angle (LIA) and shape, and stomatal density and size. Genotypes with lower leaf area per tree showed higher mean LIA (R2=0.23, p< 0.05). Negative correlations were also found across genotypes between stomatal density and stomatal size (R2=0.67, p< 0.001), and between LIA and stomatal density (R2=0.61, p< 0.001). Genotypes with higher LIA showed more narrow and long leaves (R2=0.57, p< 0.001). From wetter to drier conditions in the regions where the clones were selected, the main trend was a decrease in leaf area per tree and in stomatal density per area of leaf, as well as an increase in LIA, and stomatal size. Improving our understanding of the trade-offs among leaf traits can help tree breeding programs to select genotypes able to cope with specific climatic 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 15
Claim · model-written summary
Most Eucalyptus genotypes had about 5% of leaf thickness as cuticles
- Taxon
- Eucalyptus
.jpg?width=60)
Eucalyptuse0 - Organ / stage
- leafe1
- Outcome
- cuticlese1
- Value
- about 5%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e1“Most genotypes exhibited similar leaf anatomy, with about 5% of leaf thickness constituted of cuticles, 11% of epidermis, 26% of palisade parenchyma, and 58% of spongy parenchyma”
Claim · model-written summary
Most Eucalyptus genotypes had about 11% of leaf thickness as epidermis
- Taxon
- EucalyptusEucalyptuse0
- Organ / stage
- leafe1
- Outcome
- epidermise1
- Value
- 11%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e1“Most genotypes exhibited similar leaf anatomy, with about 5% of leaf thickness constituted of cuticles, 11% of epidermis, 26% of palisade parenchyma, and 58% of spongy parenchyma”
Claim · model-written summary
Most Eucalyptus genotypes had about 26% of leaf thickness as palisade parenchyma
- Taxon
- EucalyptusEucalyptuse0
- Organ / stage
- leafe1
- Outcome
- palisade parenchymae1
- Value
- 26%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e1“Most genotypes exhibited similar leaf anatomy, with about 5% of leaf thickness constituted of cuticles, 11% of epidermis, 26% of palisade parenchyma, and 58% of spongy parenchyma”
Claim · model-written summary
Most Eucalyptus genotypes had about 58% of leaf thickness as spongy parenchyma
- Taxon
- EucalyptusEucalyptuse0
- Organ / stage
- leafe1
- Outcome
- spongy parenchymae1
- Value
- 58%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e1“Most genotypes exhibited similar leaf anatomy, with about 5% of leaf thickness constituted of cuticles, 11% of epidermis, 26% of palisade parenchyma, and 58% of spongy parenchyma”
Claim · model-written summary
The clone E.grandis x E.camaldulensis had no spongy parenchyma
- Taxon
- EucalyptusEucalyptuse0
- Material
- E.grandis x E.camaldulensise2
- Outcome
- spongy parenchymae2
- Qualifier
- no spongy parenchymae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e2“The only exception was the clone E.grandis x E.camaldulensis, with no spongy parenchyma and thick palisade parenchyma (84% of the leaf thickness)”
Claim · model-written summary
The clone E.grandis x E.camaldulensis had thick palisade parenchyma of 84% of leaf thickness
- Taxon
- EucalyptusEucalyptuse0
- Material
- E.grandis x E.camaldulensise2
- Outcome
- palisade parenchymae2
- Value
- 84%e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e2“The only exception was the clone E.grandis x E.camaldulensis, with no spongy parenchyma and thick palisade parenchyma (84% of the leaf thickness)”
Claim · model-written summary
Most Eucalyptus clones had hypostomatic leaves
- Taxon
- EucalyptusEucalyptuse0
- Organ / stage
- leavese3
- Outcome
- hypostomatic leavese3
- Qualifier
- except two genotypes with amphistomatic leavese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e3“The clones had hypostomatic leaves, except two genotypes with amphistomatic leaves (E.grandis x E.camaldulensis and E.grandis)”
Claim · model-written summary
Two Eucalyptus genotypes had amphistomatic leaves
- Taxon
- EucalyptusEucalyptuse0
- Material
- E.grandis x E.camaldulensis and E.grandise3
- Outcome
- amphistomatic leavese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e3“The clones had hypostomatic leaves, except two genotypes with amphistomatic leaves (E.grandis x E.camaldulensis and E.grandis)”
Claim · model-written summary
Genotypes with lower leaf area per tree had higher mean leaf inclination angle (LIA)
- Taxon
- EucalyptusEucalyptuse0
- Treatment
- lower leaf area per treee4
- Outcome
- mean LIAe4
- Direction
- highere4
- Value
- R2=0.23e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e4“Genotypes with lower leaf area per tree showed higher mean LIA (R2=0.23, p< 0.05)”
Claim · model-written summary
Stomatal density and stomatal size were negatively correlated across genotypes
- Taxon
- EucalyptusEucalyptuse0
- Treatment
- stomatal densitye5
- Outcome
- stomatal sizee5
- Direction
- Negativee5
- Value
- R2=0.67e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e5“Negative correlations were also found across genotypes between stomatal density and stomatal size (R2=0.67, p< 0.001), and between LIA and stomatal density (R2=0.61, p< 0.001)”
Claim · model-written summary
LIA and stomatal density were negatively correlated across genotypes
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e5“Negative correlations were also found across genotypes between stomatal density and stomatal size (R2=0.67, p< 0.001), and between LIA and stomatal density (R2=0.61, p< 0.001)”
Claim · model-written summary
Genotypes with higher LIA had more narrow and long leaves
- Taxon
- EucalyptusEucalyptuse0
- Treatment
- higher LIAe6
- Outcome
- narrow and long leavese6
- Direction
- moree6
- Value
- R2=0.57e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e6“Genotypes with higher LIA showed more narrow and long leaves (R2=0.57, p< 0.001)”
Claim · model-written summary
From wetter to drier conditions, the main trend was a decrease in leaf area per tree and in stomatal density per area of leaf
- Taxon
- EucalyptusEucalyptuse0
- Treatment
- From wetter to drier conditionse7
- Outcome
- leaf area per tree and in stomatal density per area of leafe7
- Direction
- decreasee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e7“From wetter to drier conditions in the regions where the clones were selected, the main trend was a decrease in leaf area per tree and in stomatal density per area of leaf, as well as an increase in LIA, and stomatal size”
Claim · model-written summary
From wetter to drier conditions, the main trend was an increase in LIA and stomatal size
- Taxon
- EucalyptusEucalyptuse0
- Treatment
- From wetter to drier conditionse7
- Outcome
- LIA, and stomatal sizee7
- Direction
- increasee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e7“From wetter to drier conditions in the regions where the clones were selected, the main trend was a decrease in leaf area per tree and in stomatal density per area of leaf, as well as an increase in LIA, and stomatal size”
Claim · model-written summary
Understanding leaf-trait trade-offs can help tree breeding select Eucalyptus genotypes able to cope with specific climates
- Taxon
- EucalyptusEucalyptuse0
- Outcome
- select genotypes able to cope with specific climatic conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We selected 16 highly planted Eucalyptus genotypes”
e1“Improving our understanding of the trade-offs among leaf traits can help tree breeding programs to select genotypes able to cope with specific climatic conditions”