Faculty of Biology, University of Latvia
EEB
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Environ Exp Biol (2015) 13: 33–39
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Environmental and
Experimental
Biology

Environ Exp Biol (2015) 13: 33–39

Orginal Articles

Reproductive biology of Angraecum eburneum subsp. superbum (Orchidaceae) under glasshouse conditions

L.I. Buyun*, T.M. Cherevchenko, L.A. Kovalska, R.V. Ivannikov
M.M. Gryshko National Botanic Garden, National Academy of Sciences of Ukraine, 1 Timiryazevska Str., Kyiv, 01014, Ukraine
*Corresponding author, E-mail: orchids.lyuda@gmail.com

Abstract

The results of long-term observations on the reproductive biology of an epiphytic monopodial orchid, Angraecum eburneum subsp. superbum, under glasshouse conditions are provided. Experimental pollination treatments (induced autogamy/induced xenogamy) indicated that A. eburneum subsp. superbum is a self-compatible but not an autogamous orchid. The fruit set after self- and cross-pollination significantly differed. Cross-pollination had positive effect on seed viability of A. eburneum subsp. superbum under glasshouse conditions. The fruit set, seed mass and seed viability were compared with respect to flower position within an inflorescence. The position of pollinated flowers within the inflorescence was found to affect the fruit and seed mass, but not seed viability. The impact of various factors, including breeding systems, pollination strategies, flowering longevity, pollinated flower position in inflorescence and resource status, upon reproductive success of the orchid studied ex situ was analyzed.

Key words: Angraecum eburneum subsp. superbum, cross-pollination, flowering phenology, fruit set, morphometry, self-pollination, self-compatibility, seed viability.

 
Environ Exp Biol (2015) 13: 33–39
 DOI: http://doi.org/10.22364/eeb
EEB

Editor-in-Chief
Prof. Gederts Ievinsh



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