Labellum structure of Bulbophyllum echinolabium J.J. Sm. (section Lepidorhiza Schltr., Bulbophyllinae Schltr., Orchidaceae Juss.)

Natalia Wiśniewska , Monika Lipińska , Marek Gołębiowski , Agnieszka Kowalkowska

Abstract

This micromorphological, chemical and ultrastructural study is a continuation of research conducted on the section Lepidorhiza. The Bulbophyllum echinolabium flowers comprised features that characterize a sapromyophilous syndrome, having large, glistening parts that emit an intense scent of rotten meat. The secretory activity was described in the hypochile (nectary in longitudinal groove and in the prickles) and the epichile (putative osmophore). The ultrastructural studies revealed a dense cytoplasm in the epidermis and subepidermal tissue with large nuclei and numerous mitochondria, the profiles of SER and RER, and dictyosomes. Large amounts of heterogeneous residues of secreted material (possibly phenolic) were present on the cuticle surface, similar to the unusual prominent periplasmic space with flocculent secretory material. The chemical analysis (GC/MS) of the scent profile of lips comprised carbohydrates and their derivatives (29.55% of all compounds), amino acids (1.66%), lipids (8.04%) and other organic compounds (60.73%). A great number of identified compounds are Diptera attractants (mainly Milichiidae, Tephritidae, Drosophilidae, Muscidae, Sarcophagidae, Tachinidae). The examination of visual and olfactory features indicates correlation between colour of flowers and the type of olfactory mimicry, where a dark colour labellum emits strong smell of rotten waste.
Publication typeIn press (online first, early view)
Author Natalia Wiśniewska (FB / DPCE)
Natalia Wiśniewska ,,
- Department of Plant Cytology and Embryology
, Monika Lipińska (FB / DPTNC)
Monika Lipińska,,
- Department of Plant Taxonomy and Nature Conservation
, Marek Gołębiowski (FCh / DEA / LANC)
Marek Gołębiowski,,
- Laboratory of Analysis of Natural Compounds
, Agnieszka Kowalkowska (FB / DPCE)
Agnieszka Kowalkowska,,
- Department of Plant Cytology and Embryology
Journal seriesProtoplasma, ISSN 0033-183X, (A 30 pkt)
Issue year2019
Noonline first
Pages1-19
Publication size in sheets0.9
Keywords in Englishhistochemistry, micromorphology, ultrastructure, GC/MS, sapromyophily, fly-pollination syndrome
ASJC Classification1307 Cell Biology; 1110 Plant Science; 2700 General Medicine
DOIDOI:10.1007/s00709-019-01372-4
URL https://link.springer.com/article/10.1007/s00709-019-01372-4
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)30
ScoreMinisterial score = 30.0, 24-07-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.962; WoS Impact Factor: 2017 = 2.457 (2) - 2017=2.43 (5)
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