<b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae)
Pyrostegia venusta (the orange trumpet or commoly called cipó-de-São-João in Brazil), a medicinal plant that grows with other plants, has an ecological importance due to the presence of nectaries on the leaves. The aim of this work was to study structural and histochemical aspects and the distributi...
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Maringá
2014-08-01
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| Series: | Acta Scientiarum: Biological Sciences |
| Subjects: | |
| Online Access: | http://186.233.154.254/ojs/index.php/ActaSciBiolSci/article/view/23450 |
| _version_ | 1811228911373123584 |
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| author | Mairon César Coimbra Ana Hortência Fonsêca Castro |
| author_facet | Mairon César Coimbra Ana Hortência Fonsêca Castro |
| author_sort | Mairon César Coimbra |
| collection | DOAJ |
| description | Pyrostegia venusta (the orange trumpet or commoly called cipó-de-São-João in Brazil), a medicinal plant that grows with other plants, has an ecological importance due to the presence of nectaries on the leaves. The aim of this work was to study structural and histochemical aspects and the distribution of extrafloral nectaries (ENFs) in P. venusta leaves. Young leaves were collected, fixed and processed by usual techniques, and studied under light microscopy and scanning electron microscopy. Analyses showed that the extrafloral nectaries are dispersed throughout the leaf, with concentrations mainly in the basal third section. Nectaries lie in epidermal depressions and can be found in abaxial and adaxial leaf blades. Their morphology may be characterized macroscopically by achlorophyllous halos and microscopically as structures consisting of a short pedicel, oval multicellular head, covered by a thin cuticular layer with a secretory pole. Reducing sugars, neutral polysaccharides, proteins, starch and phenolic compounds were detected in extrafloral nectaries. |
| first_indexed | 2024-04-12T10:04:42Z |
| format | Article |
| id | doaj.art-da0699cf90bd4e1989c99036ccff66a7 |
| institution | Directory Open Access Journal |
| issn | 1679-9283 1807-863X |
| language | English |
| last_indexed | 2024-04-12T10:04:42Z |
| publishDate | 2014-08-01 |
| publisher | Universidade Estadual de Maringá |
| record_format | Article |
| series | Acta Scientiarum: Biological Sciences |
| spelling | doaj.art-da0699cf90bd4e1989c99036ccff66a72022-12-22T03:37:28ZengUniversidade Estadual de MaringáActa Scientiarum: Biological Sciences1679-92831807-863X2014-08-0136332132610.4025/actascibiolsci.v36i3.2345011175<b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae)Mairon César Coimbra0Ana Hortência Fonsêca Castro1Universidade Federal de São João del-ReiUniversidade Federal de São João del-ReiPyrostegia venusta (the orange trumpet or commoly called cipó-de-São-João in Brazil), a medicinal plant that grows with other plants, has an ecological importance due to the presence of nectaries on the leaves. The aim of this work was to study structural and histochemical aspects and the distribution of extrafloral nectaries (ENFs) in P. venusta leaves. Young leaves were collected, fixed and processed by usual techniques, and studied under light microscopy and scanning electron microscopy. Analyses showed that the extrafloral nectaries are dispersed throughout the leaf, with concentrations mainly in the basal third section. Nectaries lie in epidermal depressions and can be found in abaxial and adaxial leaf blades. Their morphology may be characterized macroscopically by achlorophyllous halos and microscopically as structures consisting of a short pedicel, oval multicellular head, covered by a thin cuticular layer with a secretory pole. Reducing sugars, neutral polysaccharides, proteins, starch and phenolic compounds were detected in extrafloral nectaries.http://186.233.154.254/ojs/index.php/ActaSciBiolSci/article/view/23450Pyrostegia venustamorphologySecretory Structure |
| spellingShingle | Mairon César Coimbra Ana Hortência Fonsêca Castro <b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae) Acta Scientiarum: Biological Sciences Pyrostegia venusta morphology Secretory Structure |
| title | <b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae) |
| title_full | <b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae) |
| title_fullStr | <b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae) |
| title_full_unstemmed | <b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae) |
| title_short | <b>Distribution and structural aspects of extrafloral nectaries in leaves of <i>Pyrostegia venusta</i> (Bignoniaceae) |
| title_sort | b distribution and structural aspects of extrafloral nectaries in leaves of i pyrostegia venusta i bignoniaceae |
| topic | Pyrostegia venusta morphology Secretory Structure |
| url | http://186.233.154.254/ojs/index.php/ActaSciBiolSci/article/view/23450 |
| work_keys_str_mv | AT maironcesarcoimbra bdistributionandstructuralaspectsofextrafloralnectariesinleavesofipyrostegiavenustaibignoniaceae AT anahortenciafonsecacastro bdistributionandstructuralaspectsofextrafloralnectariesinleavesofipyrostegiavenustaibignoniaceae |