Abstract
Abstract Leguminosae comprises approximately 19,325 species in 727 genera, organized into six subfamilies. Its occurrence is notable in all Brazilian phytogeographic domains, which integrates the third largest angiosperm family and the second in economic importance. Species of Leguminosae present several secretory structures that are used as taxonomic markers and exudated considered important for ecological interactions. This study aimed to review the types of secretory structures, distribution, and chemical composition of the secretions of Caesalpinioideae (including the Mimosoid clade), Cercidoideae, and Detarioideae subfamilies of Brazilian genera, as well as to evaluate the circumscription of the Mimosoid clade within the subfamily Caesalpinioideae based on these structures. A review was performed by compiling information from specialized journals and repositories of articles, dissertations and theses related to different secretory structures in the three subfamilies. Secretory structures were found in 242 species — 224 from Caesalpinioideae, 7 from Cercidoideae, and 11 from Detarioideae. Extrafloral nectaries predominated in 177 species, followed by colleters in 54 species, idioblasts in 15 and secretory cavities in eight of them. Caesalpinioideae shows primary metabolites associated with secretory structures, which enhance mutualistic interactions. The mucilage present in colleters protects the shoot apex against desiccation. The terpenoid and flavonoid classes are mostly produced by these distinct secretory structures in Cercidoideae and Detarioideae. Of the secretory structures found, a predominance of extrafloral nectaries was observed in both the Mimosoid clade and among the studied Caesalpinioideae genera. This study supports the circumscription of the Mimosoid clade and offers important information for future systematic and evolutionary studies within Leguminosae.
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Claims 14
Claim · model-written summary
Secretory structures were reported in 242 species, mostly Caesalpinioideae.
Not reportedTaxon
Verbatim
e0“Secretory structures were found in 242 species — 224 from Caesalpinioideae, 7 from Cercidoideae, and 11 from Detarioideae”
Claim · model-written summary
The review found secretory structures in 224 Caesalpinioideae species.
- Taxon
- CaesalpinioideaeCaesalpinioideaee0
- Outcome
- 224 from Caesalpinioideaee0
- Value
- 224e0
Verbatim
e0“224 from Caesalpinioideae”
Claim · model-written summary
The review found secretory structures in seven Cercidoideae species.
- Taxon
- CercidoideaeCercidoideaee0
- Outcome
- 7 from Cercidoideaee0
- Value
- 7e0
Verbatim
e0“7 from Cercidoideae”
Claim · model-written summary
The review found secretory structures in 11 Detarioideae species.
- Taxon
- DetarioideaeDetarioideaee0
- Outcome
- 11 from Detarioideaee0
- Value
- 11e0
Verbatim
e0“11 from Detarioideae”
Claim · model-written summary
Extrafloral nectaries predominated in 177 species.
Not reportedTaxon
Verbatim
e0“Extrafloral nectaries predominated in 177 species”
Claim · model-written summary
Colleters occurred in 54 species.
Not reportedTaxon
Verbatim
e0“colleters in 54 species”
Claim · model-written summary
Idioblasts occurred in 15 species.
Not reportedTaxon
Verbatim
e0“idioblasts in 15”
Claim · model-written summary
Secretory cavities occurred in eight species.
Not reportedTaxon
Verbatim
e0“secretory cavities in eight of them”
Claim · model-written summary
Primary metabolites in Caesalpinioideae secretory structures enhance mutualistic interactions.
- Taxon
- CaesalpinioideaeCaesalpinioideaee0
- Outcome
- mutualistic interactionse0
- Qualifier
- primary metabolites associated with secretory structurese0
Verbatim
e0“Caesalpinioideae shows primary metabolites associated with secretory structures, which enhance mutualistic interactions”
Claim · model-written summary
Mucilage in colleters protects the shoot apex against desiccation.
Not reportedTaxon
Verbatim
e0“The mucilage present in colleters protects the shoot apex against desiccation”
Claim · model-written summary
Secretory structures of Cercidoideae mostly produce terpenoids and flavonoids.
- Taxon
- CercidoideaeCercidoideaee0
- Outcome
- terpenoid and flavonoid classese0
Verbatim
e0“The terpenoid and flavonoid classes are mostly produced by these distinct secretory structures in Cercidoideae and Detarioideae”
Claim · model-written summary
Secretory structures of Detarioideae mostly produce terpenoids and flavonoids.
- Taxon
- DetarioideaeDetarioideaee0
- Outcome
- terpenoid and flavonoid classese0
Verbatim
e0“The terpenoid and flavonoid classes are mostly produced by these distinct secretory structures in Cercidoideae and Detarioideae”
Claim · model-written summary
Extrafloral nectaries predominate in the Mimosoid clade and studied Caesalpinioideae genera.
- Taxon
- CaesalpinioideaeCaesalpinioideaee0
- Outcome
- predominance of extrafloral nectariese0
Verbatim
e0“a predominance of extrafloral nectaries was observed in both the Mimosoid clade and among the studied Caesalpinioideae genera”
Claim · model-written summary
The secretory structure evidence supports circumscription of the Mimosoid clade.
- Taxon
- Mimosoid clademimosoid cladee0
- Outcome
- circumscription of the Mimosoid cladee0
Verbatim
e0“This study supports the circumscription of the Mimosoid clade”