Floral structure of two species of Bulbophyllum section Cirrhopetalum Lindl.: B. weberi Ames and B. cumingii (Lindl.) Rchb. f. (Bulbophyllinae Schltr., Orchidaceae)

Agnieszka Kowalkowska , Sławomir Turzyński , Małgorzata Kozieradzka-Kiszkurno , Natalia Wiśniewska

Abstract

Flowers of Bulbophyllum weberi and B. cumingii are characterized by fly-pollinated features. The secretory activity was described in dorsal sepals in both species (putative osmophores), petals in B. weberi (possible osmophores) and adaxial surface of lips in both species. In the cells of dorsal sepals and petals of B. weberi proteins, dihydroxyphenols, lipids and starch grains were detected, in lateral sepals—lipids. Whereas in dorsal sepal of B. cumingii only lipids and starch grains were noted, in lateral sepals—proteins and dihydroxyphenols and in petals—proteins and starch grains. The lips in both species differed histochemically and ultrastructurally. The epidermal cells of lip groove in B. weberi contained lipids, proteins, starch grains in cytoplasm, dihydroxyphenols in vacuoles and pectic acids/mucilage on surface. Whereas in B. cumingii—few lipids, starch grains, no proteins, no dihydroxyphenols and no mucilage were noted. Ultrastructurally, in B. weberi, the secretory material was present on surface and vesicles building into plasmalemma, while in B. cumingii—cell wall ingrowths and microchannels in cuticle. The osmiophilic irregular materials and globular, osmiophilic globules in B. weberi are probably tannin-like materials. For the first time, we described the cell wall ingrowths in Bulbophyllum species: in lip of B. cumingii and petals of B. weberi.
Author Agnieszka Kowalkowska KCiER
Agnieszka Kowalkowska,,
- Department of Plant Cytology and Embryology
, Sławomir Turzyński WB
Sławomir Turzyński,,
- Faculty of Biology
, Małgorzata Kozieradzka-Kiszkurno KCiER
Małgorzata Kozieradzka-Kiszkurno,,
- Department of Plant Cytology and Embryology
, Natalia Wiśniewska KCiER
Natalia Wiśniewska ,,
- Department of Plant Cytology and Embryology
Journal seriesProtoplasma, ISSN 0033-183X
Issue year2017
Vol254
No3
Pages1431-1449
Publication size in sheets0.9
Keywords in EnglishBulbophyllum weberi, Bulbophyllum cumingii, Bulbophyllum, Cirrhopetalum, nectary, osmophore, ultrastructure
DOIDOI:10.1007/s00709-016-1034-3
URL http://link.springer.com/article/10.1007%2Fs00709-016-1034-3
Languageen angielski
LicenseOther; published final; Uznanie Autorstwa (CC-BY); with publication
Score (nominal)30
ScoreMinisterial score = 30.0, 20-12-2017, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 20-12-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.87 (2) - 2016=2.658 (5)
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