Evolutionary trends and diversity of major floral nectary types across Solanaceae.
Asterids
Floral symmetry
Nectar
Pollination syndromes
Journal
Planta
ISSN: 1432-2048
Titre abrégé: Planta
Pays: Germany
ID NLM: 1250576
Informations de publication
Date de publication:
20 Aug 2021
20 Aug 2021
Historique:
received:
22
05
2021
accepted:
12
08
2021
entrez:
20
8
2021
pubmed:
21
8
2021
medline:
25
8
2021
Statut:
epublish
Résumé
In a co-evolutionary crosstalk amid plants and their pollinators, nectaries serve as a labile link between the relatively fixed structural domains of divergent flower forms and associated pollination syndromes. Floral nectary plays a crucial role in sexual plant reproduction by enabling interaction between plants and their pollinators. It is known to associate with different floral whorls, and exhibits variations in structure and location in different clades across angiosperms. To infer evolutionary patterns, it is important to map key features associated with the trait at various taxonomic ranks. In the present study, we analysed variability and distribution of floral nectaries in Solanaceae for the first time. Floral nectaries of 23 taxa representing different clades in the family were studied using bright-field and scanning electron microscopy. The study reveals that although floral nectaries share anatomical similarity, they differ in morphology, composition within cells, and locations within a flower across the clades. The analysis suggests that (i) there is a shift from symmetric, lobed type nectary in the early branching sub-families to asymmetric, annular type in the late branching ones, (ii) floral organization has shifted from asymmetry (zygomorphy) to symmetry (actinomorphy) in corolla, and (iii) the lobed nectary correlates with zygomorphic floral forms that are pollinated by birds and long-tongued vectors, while the annular nectary is predominant among species with bee-pollinated actinomorphic flowers.
Identifiants
pubmed: 34415427
doi: 10.1007/s00425-021-03705-1
pii: 10.1007/s00425-021-03705-1
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
55Subventions
Organisme : Institution of Eminence, University of Delhi
ID : (IoE/FRP/LS/2020/27)
Informations de copyright
© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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