Extranuptial nectaries in bromeliads: a new record for Pitcairnia burchellii and perspectives for Bromeliaceae.
Bud protection
Extrafloral nectaries
Nectar release
Plant-environment interactions
Plant–insect interactions
Secretory structures
Journal
Die Naturwissenschaften
ISSN: 1432-1904
Titre abrégé: Naturwissenschaften
Pays: Germany
ID NLM: 0400767
Informations de publication
Date de publication:
16 May 2022
16 May 2022
Historique:
received:
16
03
2022
accepted:
19
04
2022
revised:
13
04
2022
entrez:
16
5
2022
pubmed:
17
5
2022
medline:
19
5
2022
Statut:
epublish
Résumé
Nectar plays important roles in the relationship between plants and other organisms, both within pollination systems and as a defense mechanism. In the latter case, extranuptial nectaries (ENNs) usually attract patrolling arthropods that reduce herbivory. ENNs have been frequently reported within the "xeric clade" of Bromeliaceae, but their occurrence in other groups of bromeliads is largely unexplored, especially considering their position, secretory activity and structure. After observing the presence of ants constantly patrolling the inflorescences of Pitcairnia burchellii Mez, we searched for the presence, secretory activity, and structure of ENNs in this species. We also provide a brief review of the occurrence ENNs in Bromeliaceae. The distribution of nectaries was assessed using ant-exclusion experiments, while structural analysis was performed using standard methods for light and scanning electron microscopy. The presence of sugars in the secretion was assessed by thin-layer chromatography and glucose strip tests. Nectaries in P. burchelli are non-structured glands on the adaxial surface of floral bracts and sepals. Bracts and sepals are distinct spatial units that act over time in the same strategy of floral bud protection. Literature data reveals that ENNs might be more common within Bromeliaceae than previously considered, comprising a homoplastic feature in the family. Future perspectives and evolutionary and taxonomic implications are discussed.
Identifiants
pubmed: 35575831
doi: 10.1007/s00114-022-01799-5
pii: 10.1007/s00114-022-01799-5
doi:
Substances chimiques
Plant Nectar
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
28Subventions
Organisme : Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
ID : Finance Code 001
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 307353/2021-4
Organisme : Conselho Nacional de Desenvolvimento Científico e Tecnológico
ID : 303059/2020-6
Organisme : Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
ID : E-26/202.778/2018
Organisme : Fundação de Amparo à Pesquisa do Estado de Minas Gerais
ID : APQ-01926-18
Informations de copyright
© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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