Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i>
Secretory ducts have been reported for more than 50 families of vascular plants among primary and secondary tissues. A priori, all ducts of a plant are of the same type, and only slight variations in the concentration of their compounds have been reported for few species. However, two types of secre...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/10/5/877 |
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| author | Ellenhise R. Costa Marcelo M. P. Tangerina Marcelo J. P. Ferreira Diego Demarco |
| author_facet | Ellenhise R. Costa Marcelo M. P. Tangerina Marcelo J. P. Ferreira Diego Demarco |
| author_sort | Ellenhise R. Costa |
| collection | DOAJ |
| description | Secretory ducts have been reported for more than 50 families of vascular plants among primary and secondary tissues. A priori, all ducts of a plant are of the same type, and only slight variations in the concentration of their compounds have been reported for few species. However, two types of secretion were observed in primary and secondary tissues of <i>Kielmeyera appariciana</i>, leading us to investigate the possible influence of duct origins on the structure and metabolism of this gland. <i>Kielmeyera appariciana</i> has primary ducts in the cortex and pith and secondary ducts in the phloem. Both ducts are composed of uniseriate epithelium surrounded by a sheath and a lumen formed by a schizogenous process. Despite their similar structure and formation, the primary ducts produce resin, while the secondary ducts produce gum. This is the first report of two types of ducts in the same plant. The distinct origin of the ducts might be related to the metabolic alteration, which likely led to suppression of the biosynthetic pathway of terpenoids and phenolics in the secondary ducts. The functional and evolutionary implications of this innovation are discussed in our study and may be related to the diversification of <i>Kielmeyera</i> and Calophyllaceae in tropical environments. |
| first_indexed | 2024-03-10T11:56:28Z |
| format | Article |
| id | doaj.art-ecc1ac4cba9d429c881fd1e94aa014a5 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T11:56:28Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Plants |
| spelling | doaj.art-ecc1ac4cba9d429c881fd1e94aa014a52023-11-21T17:17:57ZengMDPI AGPlants2223-77472021-04-0110587710.3390/plants10050877Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i>Ellenhise R. Costa0Marcelo M. P. Tangerina1Marcelo J. P. Ferreira2Diego Demarco3Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo CEP 05508-090, BrazilDepartamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo CEP 05508-090, BrazilDepartamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo CEP 05508-090, BrazilDepartamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo CEP 05508-090, BrazilSecretory ducts have been reported for more than 50 families of vascular plants among primary and secondary tissues. A priori, all ducts of a plant are of the same type, and only slight variations in the concentration of their compounds have been reported for few species. However, two types of secretion were observed in primary and secondary tissues of <i>Kielmeyera appariciana</i>, leading us to investigate the possible influence of duct origins on the structure and metabolism of this gland. <i>Kielmeyera appariciana</i> has primary ducts in the cortex and pith and secondary ducts in the phloem. Both ducts are composed of uniseriate epithelium surrounded by a sheath and a lumen formed by a schizogenous process. Despite their similar structure and formation, the primary ducts produce resin, while the secondary ducts produce gum. This is the first report of two types of ducts in the same plant. The distinct origin of the ducts might be related to the metabolic alteration, which likely led to suppression of the biosynthetic pathway of terpenoids and phenolics in the secondary ducts. The functional and evolutionary implications of this innovation are discussed in our study and may be related to the diversification of <i>Kielmeyera</i> and Calophyllaceae in tropical environments.https://www.mdpi.com/2223-7747/10/5/877secretory ductsstructureoriginresingumevolution |
| spellingShingle | Ellenhise R. Costa Marcelo M. P. Tangerina Marcelo J. P. Ferreira Diego Demarco Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i> Plants secretory ducts structure origin resin gum evolution |
| title | Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i> |
| title_full | Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i> |
| title_fullStr | Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i> |
| title_full_unstemmed | Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i> |
| title_short | Two Origins, Two Functions: The Discovery of Distinct Secretory Ducts Formed during the Primary and Secondary Growth in <i>Kielmeyera</i> |
| title_sort | two origins two functions the discovery of distinct secretory ducts formed during the primary and secondary growth in i kielmeyera i |
| topic | secretory ducts structure origin resin gum evolution |
| url | https://www.mdpi.com/2223-7747/10/5/877 |
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