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Anatomical adaptations of terrestrial orchids to shading
KEMPSKÁ, Veronika
The Orchids Erythrodes nobilis, Macodes petola, Ludisia discolor, Erythrodes hirsura, Dosinia marmorata a Anoectochilus sp. belongs to a group of terestrial orchids of south-eastern Asia. These orchids are adapted to life the undergrowth of tropical rain forests. This thesis deals with the adaptations to shading of these orchids especially with the anatomical adaptations and the concentration of pigments (chlorophyll a, chlorophyll b, carotenoids, anthocyanins). The typical attributes of the leaf anatomical structure of the species studied include one-layer epidermis consisting of lens-like cells, and the upper layer of mezophyll with signs of palisade parenchyma and high content of chlorophylls.
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Anatomical adaptation of the orchid Erythrodes nobilis to shading
KEMPSKÁ, Veronika
Orchid Erythrodes nobilis is ranked among terestrical orchids, which grows in shady undergrowth of Brazil tropical rainforest. This species has adapted to very strong shading. This thesis is focused on adaptations on shading of orchid Erythrodes nobilis, especially anatomical adaptation, chlorophyl adaptations and growth analysis. The typical feature of leaves structure of an orchid Erythrodes nobilis are especially lens-like cells in the skin and two-layers wide palisade parenchyma with high content of chlorophyl. The plant has responded to darkening with enhancement of leaf size, chlorophyl content and even the content of b-chlorophyl in adult leaves and creation of new leaves with enormous specific leaf size.
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In vitro cultivation possibilities of orchid Macodes petola
SVOBODOVÁ, Simona
The orchid family covers 90 percent of the rarest plants under protection all over the world. The ecological and economic value of orchids has aroused public awareness. Since vegatitve propagation methods are available, development of in vitro methods are essential for conservation and commercialization of plants. Purposes work was elaboration progress of vegetative multiplication for tropical orchid Macodes petola in conditions in vitro. At research were proof 4 methods, which distinguish in using desinfection, in operating time and in using different nutritive mediums.
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