Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae)
Buds usually possess mechanical or chemical protection and may also have secretory structures. We discovered an intricate secretory system in <i>Ouratea castaneifolia</i> (Ochnaceae) related to the protection of buds and young leaves. We studied this system, focusing on the distribution,...
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MDPI AG
2021-08-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/10/8/1680 |
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| author | Elder A. S. Paiva Gabriel A. Couy-Melo Igor Ballego-Campos |
| author_facet | Elder A. S. Paiva Gabriel A. Couy-Melo Igor Ballego-Campos |
| author_sort | Elder A. S. Paiva |
| collection | DOAJ |
| description | Buds usually possess mechanical or chemical protection and may also have secretory structures. We discovered an intricate secretory system in <i>Ouratea castaneifolia</i> (Ochnaceae) related to the protection of buds and young leaves. We studied this system, focusing on the distribution, morphology, histochemistry, and ultrastructure of glands during sprouting. Samples of buds and leaves were processed following the usual procedures for light and electron microscopy. Overlapping bud scales protect dormant buds, and each young leaf is covered with a pair of stipules. Stipules and scales possess a resin gland, while the former also possess an extrafloral nectary. Despite their distinct secretions, these glands are similar and comprise secreting palisade epidermis. Young leaves also possess marginal colleters. All the studied glands shared some structural traits, including palisade secretory epidermis and the absence of stomata. Secretory activity is carried out by epidermal cells. Functionally, the activity of these glands is synchronous with the young and vulnerable stage of vegetative organs. This is the first report of colleters and resin glands for <i>O. castaneifolia</i>. We found evidence that these glands are correlated with protection against herbivores and/or abiotic agents during a developmental stage that precedes the establishment of mechanical defenses. |
| first_indexed | 2024-03-10T08:27:08Z |
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| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T08:27:08Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-2b5dd85c1c0f45b09444f175c93bb5dc2023-11-22T09:20:02ZengMDPI AGPlants2223-77472021-08-01108168010.3390/plants10081680Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae)Elder A. S. Paiva0Gabriel A. Couy-Melo1Igor Ballego-Campos2Departamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, BrazilDepartamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, BrazilDepartamento de Botânica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, BrazilBuds usually possess mechanical or chemical protection and may also have secretory structures. We discovered an intricate secretory system in <i>Ouratea castaneifolia</i> (Ochnaceae) related to the protection of buds and young leaves. We studied this system, focusing on the distribution, morphology, histochemistry, and ultrastructure of glands during sprouting. Samples of buds and leaves were processed following the usual procedures for light and electron microscopy. Overlapping bud scales protect dormant buds, and each young leaf is covered with a pair of stipules. Stipules and scales possess a resin gland, while the former also possess an extrafloral nectary. Despite their distinct secretions, these glands are similar and comprise secreting palisade epidermis. Young leaves also possess marginal colleters. All the studied glands shared some structural traits, including palisade secretory epidermis and the absence of stomata. Secretory activity is carried out by epidermal cells. Functionally, the activity of these glands is synchronous with the young and vulnerable stage of vegetative organs. This is the first report of colleters and resin glands for <i>O. castaneifolia</i>. We found evidence that these glands are correlated with protection against herbivores and/or abiotic agents during a developmental stage that precedes the establishment of mechanical defenses.https://www.mdpi.com/2223-7747/10/8/1680calcium oxalate crystalscolleterextrafloral nectariesresin glandbud protectionplant-environment interaction |
| spellingShingle | Elder A. S. Paiva Gabriel A. Couy-Melo Igor Ballego-Campos Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae) Plants calcium oxalate crystals colleter extrafloral nectaries resin gland bud protection plant-environment interaction |
| title | Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae) |
| title_full | Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae) |
| title_fullStr | Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae) |
| title_full_unstemmed | Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae) |
| title_short | Colleters, Extrafloral Nectaries, and Resin Glands Protect Buds and Young Leaves of <i>Ouratea castaneifolia</i> (DC.) Engl. (Ochnaceae) |
| title_sort | colleters extrafloral nectaries and resin glands protect buds and young leaves of i ouratea castaneifolia i dc engl ochnaceae |
| topic | calcium oxalate crystals colleter extrafloral nectaries resin gland bud protection plant-environment interaction |
| url | https://www.mdpi.com/2223-7747/10/8/1680 |
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