Biometric characteristics and surface microstructure of vegetative and reproductive organs of heterosporous water fern Salvinia natans.
In: Flora, Jg. 252 (2019-03-01), S. 44-50
Online
academicJournal
Highlights • Adaxial epidermis of floating fronds holds sunken stomata and multicellular trichomes. • The submerged leaves contain numerous filamentous trichomes. • The spore-bearing organs are represented by submerged sori. • The microsporangiate sori contain a number of small spherical microsporangia. • The megasporangiate sori include a small number of large ovoid-oval megasporangia. Abstract The article describes the growth and development of Salvinia natans (L.) All., a native aquatic fern found in Ukraine, collected from artificial water reservoirs in the Desnyansky district of Kyiv. Scanning electron microscopy was used to study the surface microstructure of its vegetative and reproductive organs. The success of the fern on the boundary of water and air is apparently supported by the specific microstructure of its floating leaves, the adaxial surface of which are characterised by the presence of a well-developed cuticle and sunken stomata. The stomatal density was found to be 142 per mm2, with an average stomatal pore diameter of 8.1 μm. The abaxial surface of both floating and submerged leaves was characterised by the presence of thin cell walls in the epidermis and of numerous filamentary appendages (trichomes). The structure of both the sori and the sporangia allows for an annual summer-green phenological pattern, whereby sori are produced near the bottom of the reservoir in autumn, and rise to the surface of water in spring. [ABSTRACT FROM AUTHOR]
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Biometric characteristics and surface microstructure of vegetative and reproductive organs of heterosporous water fern Salvinia natans.
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Autor/in / Beteiligte Person: | Babenko, Lidia ; Vasheka, Olena ; Shcherbatiuk, Mykola ; Romanenko, Petro ; Voytenko, Lesya ; Kosakivska, Iryna |
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Zeitschrift: | Flora, Jg. 252 (2019-03-01), S. 44-50 |
Veröffentlichung: | 2019 |
Medientyp: | academicJournal |
ISSN: | 0367-2530 (print) |
DOI: | 10.1016/j.flora.2019.02.006 |
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