Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic Significance
Rhamnaceae flowers are notably recognized by their fleshy nectary. Other types of floral secretory structures have been scarcely reported for this family. Thus, the objective of the present study was to update the occurrence of these structures in the family and to contribute to the knowledge of the...
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doaj-1861fc578684444da59e0d58d2d045132021-04-09T23:04:19ZengMDPI AGPlants2223-77472021-04-011073673610.3390/plants10040736Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic SignificanceCarimi Ribeiro0Cristina Marinho1Simone Teixeira2Post-Graduate Program in Comparative Biology, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, 14040-901 Ribeirão Preto, BrazilReal Jardín Botánico, CSIC, 28014 Madrid, SpainFaculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, 14040-903 Ribeirão Preto, BrazilRhamnaceae flowers are notably recognized by their fleshy nectary. Other types of floral secretory structures have been scarcely reported for this family. Thus, the objective of the present study was to update the occurrence of these structures in the family and to contribute to the knowledge of their morphology and systematic significance. To this end, we carried out an extensive bibliographic search on the secretory structures of the family and obtained data for 257 taxa. Additionally, we presented here novel data (surface, anatomy, and ultrastructure) for six species belonging to the main clades within Rhamnaceae. The family has a wide diversity of types of mucilage-secreting structures: epidermis, hypodermis, idioblasts, cavities, and ducts. Mucilage and phenolic idioblasts are widely distributed among the floral organs. Colleters are present in all sampled species, and these are the first reports of their occurrence in floral organs of Rhamnaceae. The information obtained about the structure, secreted content, and occurrence of the secretory structures of Rhamnaceae helped us to understand the assertive folk use of its species. The absence of mucilage and the presence of resin or mucilage cavities and ducts in some taxa may have intrafamily systematic significance.https://www.mdpi.com/2223-7747/10/4/736cavitiescolletersductsidioblastsglandsmucilage |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Carimi Ribeiro Cristina Marinho Simone Teixeira |
spellingShingle |
Carimi Ribeiro Cristina Marinho Simone Teixeira Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic Significance Plants cavities colleters ducts idioblasts glands mucilage |
author_facet |
Carimi Ribeiro Cristina Marinho Simone Teixeira |
author_sort |
Carimi Ribeiro |
title |
Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic Significance |
title_short |
Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic Significance |
title_full |
Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic Significance |
title_fullStr |
Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic Significance |
title_full_unstemmed |
Uncovering the Neglected Floral Secretory Structures of Rham-naceae and Their Functional and Systematic Significance |
title_sort |
uncovering the neglected floral secretory structures of rham-naceae and their functional and systematic significance |
publisher |
MDPI AG |
series |
Plants |
issn |
2223-7747 |
publishDate |
2021-04-01 |
description |
Rhamnaceae flowers are notably recognized by their fleshy nectary. Other types of floral secretory structures have been scarcely reported for this family. Thus, the objective of the present study was to update the occurrence of these structures in the family and to contribute to the knowledge of their morphology and systematic significance. To this end, we carried out an extensive bibliographic search on the secretory structures of the family and obtained data for 257 taxa. Additionally, we presented here novel data (surface, anatomy, and ultrastructure) for six species belonging to the main clades within Rhamnaceae. The family has a wide diversity of types of mucilage-secreting structures: epidermis, hypodermis, idioblasts, cavities, and ducts. Mucilage and phenolic idioblasts are widely distributed among the floral organs. Colleters are present in all sampled species, and these are the first reports of their occurrence in floral organs of Rhamnaceae. The information obtained about the structure, secreted content, and occurrence of the secretory structures of Rhamnaceae helped us to understand the assertive folk use of its species. The absence of mucilage and the presence of resin or mucilage cavities and ducts in some taxa may have intrafamily systematic significance. |
topic |
cavities colleters ducts idioblasts glands mucilage |
url |
https://www.mdpi.com/2223-7747/10/4/736 |
work_keys_str_mv |
AT carimiribeiro uncoveringtheneglectedfloralsecretorystructuresofrhamnaceaeandtheirfunctionalandsystematicsignificance AT cristinamarinho uncoveringtheneglectedfloralsecretorystructuresofrhamnaceaeandtheirfunctionalandsystematicsignificance AT simoneteixeira uncoveringtheneglectedfloralsecretorystructuresofrhamnaceaeandtheirfunctionalandsystematicsignificance |
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