Papers by Paula C B Vergílio
Stems and roots are interconnected by their secondary phloem, a complex tissue that exhibits func... more Stems and roots are interconnected by their secondary phloem, a complex tissue that exhibits functional
differences related to the anatomical structure of each organ. Here, we compared the structure of secondary
phloem in mature stems and roots of Citharexylum myrianthum Cham. (Verbenaceae). We sampled the main stems
at a height of 1.3 m and the roots at a depth of 0.5 m. We described both the qualitative and quantitative features
of all secondary phloem cell types, and compared the quantitative features using a paired Student’s t test. The
same percentage of sieve tubes in the conducting phloem between the organs indicates a similar conducting
efficiency between stem and roots, even though sieve tubes have wider diameters in the stems. Overall, stems had
a higher portion of nonconducting secondary phloem than the roots, with a higher number of both parenchyma
and sclerenchyma bands, likely indicating a higher storage and support potential of the phloem in stems.
Bark comprises structurally and functionally complex plant tissues, providing a rich source of tr... more Bark comprises structurally and functionally complex plant tissues, providing a rich source of traits for
taxonomic, phylogenetic, evolutionary and ecological studies. We compared bark traits of Stryphnodendron polyphyllum
Mart. (Leguminosae) specimens growing in two Cerrado habitats (cerrado sensu stricto and gallery forest, being fire-prone
and non-fire-prone habitats respectively), to determine which bark traits could be considered diagnostic and adaptively
informative. We analysed the anatomy and thickness of the periderm, cortex, primary and secondary phloem, and also the
bark histochemistry. Stryphnodendron polyphyllum is distinctive from other Stryphnodendron species reported in the
literature, by the presence of a rhytidome, stratified lenticels and the non-collapsed parenchyma cells in the non-conducting
phloem, which are, therefore, diagnostic traits for this species. Bark of S. polyphyllum showed a trade-off in resource
allocation between the periderm and secondary phloem, whereas the thicker rhytidome seemed to be associated with fire
protection in specimens from the fire-prone habitat, the wider sieve tubes in the thicker conducting secondary phloem
indicated efficiency of photosynthate transport in the specimens from non-fire-prone habitat.
Revista Brasileira de Ciência do Solo, 2013
The results of ecological restoration techniques can be monitored through biological indicators o... more The results of ecological restoration techniques can be monitored through biological indicators of soil quality such as the leaf litter arthropod fauna. This study aimed to determine the immediate effect of brushwood transposition transferred from an area of native vegetation to a disturbed area, on the leaf litter arthropod fauna in a degraded cerrado area. The arthropod fauna of four areas was compared: a degraded area with signal grass, two experimental brushwood transposition areas, with and without castor oil plants, and an area of native cerrado. In total, 7,660 individuals belonging to 23 taxa were sampled. Acari and Collembola were the most abundant taxa in all studied areas, followed by Coleoptera, Diptera, Hemiptera, Hymenoptera, and Symphyla. The brushwood transposition area without castor oil plants had the lowest abundance and dominance and the highest diversity of all areas, providing evidence of changes in the soil community. Conversely, the results showed that the presence of castor oil plants hampered early succession, negatively affecting ecological restoration in this area.
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Papers by Paula C B Vergílio
differences related to the anatomical structure of each organ. Here, we compared the structure of secondary
phloem in mature stems and roots of Citharexylum myrianthum Cham. (Verbenaceae). We sampled the main stems
at a height of 1.3 m and the roots at a depth of 0.5 m. We described both the qualitative and quantitative features
of all secondary phloem cell types, and compared the quantitative features using a paired Student’s t test. The
same percentage of sieve tubes in the conducting phloem between the organs indicates a similar conducting
efficiency between stem and roots, even though sieve tubes have wider diameters in the stems. Overall, stems had
a higher portion of nonconducting secondary phloem than the roots, with a higher number of both parenchyma
and sclerenchyma bands, likely indicating a higher storage and support potential of the phloem in stems.
taxonomic, phylogenetic, evolutionary and ecological studies. We compared bark traits of Stryphnodendron polyphyllum
Mart. (Leguminosae) specimens growing in two Cerrado habitats (cerrado sensu stricto and gallery forest, being fire-prone
and non-fire-prone habitats respectively), to determine which bark traits could be considered diagnostic and adaptively
informative. We analysed the anatomy and thickness of the periderm, cortex, primary and secondary phloem, and also the
bark histochemistry. Stryphnodendron polyphyllum is distinctive from other Stryphnodendron species reported in the
literature, by the presence of a rhytidome, stratified lenticels and the non-collapsed parenchyma cells in the non-conducting
phloem, which are, therefore, diagnostic traits for this species. Bark of S. polyphyllum showed a trade-off in resource
allocation between the periderm and secondary phloem, whereas the thicker rhytidome seemed to be associated with fire
protection in specimens from the fire-prone habitat, the wider sieve tubes in the thicker conducting secondary phloem
indicated efficiency of photosynthate transport in the specimens from non-fire-prone habitat.
differences related to the anatomical structure of each organ. Here, we compared the structure of secondary
phloem in mature stems and roots of Citharexylum myrianthum Cham. (Verbenaceae). We sampled the main stems
at a height of 1.3 m and the roots at a depth of 0.5 m. We described both the qualitative and quantitative features
of all secondary phloem cell types, and compared the quantitative features using a paired Student’s t test. The
same percentage of sieve tubes in the conducting phloem between the organs indicates a similar conducting
efficiency between stem and roots, even though sieve tubes have wider diameters in the stems. Overall, stems had
a higher portion of nonconducting secondary phloem than the roots, with a higher number of both parenchyma
and sclerenchyma bands, likely indicating a higher storage and support potential of the phloem in stems.
taxonomic, phylogenetic, evolutionary and ecological studies. We compared bark traits of Stryphnodendron polyphyllum
Mart. (Leguminosae) specimens growing in two Cerrado habitats (cerrado sensu stricto and gallery forest, being fire-prone
and non-fire-prone habitats respectively), to determine which bark traits could be considered diagnostic and adaptively
informative. We analysed the anatomy and thickness of the periderm, cortex, primary and secondary phloem, and also the
bark histochemistry. Stryphnodendron polyphyllum is distinctive from other Stryphnodendron species reported in the
literature, by the presence of a rhytidome, stratified lenticels and the non-collapsed parenchyma cells in the non-conducting
phloem, which are, therefore, diagnostic traits for this species. Bark of S. polyphyllum showed a trade-off in resource
allocation between the periderm and secondary phloem, whereas the thicker rhytidome seemed to be associated with fire
protection in specimens from the fire-prone habitat, the wider sieve tubes in the thicker conducting secondary phloem
indicated efficiency of photosynthate transport in the specimens from non-fire-prone habitat.