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Methodology for ex situ conservation of the gene pool of endangered annual wetland herbs of mineral-poor substrates
Navrátilová, Jana ; Navrátil, Josef
The aim of this specialised methodology is to provide an overview of the requirements of the species listed below in nature, including their distribution and the causes of their threat. The aim is to provide botanical gardens with information on detailed cultivation requirements obtained during the research of the project and many years of experience with their possession in the Botanical Garden Třeboň, which will enable long-term ex situ conservation of critically and severely endangered species of wet mineral-poor substrates: Coleanthus subtilis, Centunculus minimus, Cyperus michelianus, Illecebrum verticillatum, Juncus capitatus, Juncus tenageia, Lindernia procumbens, Pseudognaphalium luteoalbum, Radiola linoides, Spergularia echinosperma and Tillaea aquatica.\n
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Methodology for ex situ conservation of the gene pool of endangered annual wetland herbs of mineral-rich substrates
Navrátilová, Jana ; Navrátil, Josef
The aim of this specialised methodology is to provide an overview of the requirements of the species listed below in nature, including their distribution and the causes of their threat. To provide botanical gardens and nature conservation staff with information on the detailed cultivation requirements obtained during the project research and many years of experience with their possession in the Botanical Garden Třeboň, which will enable long-term ex situ conservation of partial populations of critically and severely endangered species of wet mineral-rich substrates: Bupleurum tenuissimum, Crypsis aculeata, Crypsis schoenoides, Cyperus flavescens, Samolus valerandi, Spergularia media and Tripolium pannonicum subsp. pannonicum.
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The importance and use of wetland plants in the past and present times
KOZÁK, Martin
This paper deals with a research on the importance and use of wetland plants in history and present. The aim of the work is to collect information and critically assess the information on the importance of wetland plants to human society in the past and present including their uses. The review builds on the existing treatment of the topic in the Czech language and extends it with information published in foreign-language scientific and professional literature over the last 20 years and summarizes knowledge especially on wetlands, useful, invasive and endangered wetland plants.
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Characterization of programmed cell death during lyzigenous aerenchyma formation
Lenochová, Zuzana ; Votrubová, Olga (advisor) ; Čiamporová, Milada (referee) ; Kummerová, Marie (referee)
Abstract____________________________________________________________________ 2 ABSTRACT: Zea mays is generally considered to be a plant with inducible lysigenous aerenchyma formation. The degradation of some cortical cells is triggered by environmental conditions, usually in the form of stress (submergence etc.). These cells die in a process that shows signs characteristic for programmed cell death, such as nuclear DNA fragmentation or apoptotic ultrastructural alterations. Aerenchyma formed in primary roots of thirteen examined maize accessions, irrespective of cultivation conditions. The aerenchyma fraction correlated with the root length, not with its age. The dependence of aerenchyma formation on the presence of this phytohormone was proved by using an inhibitor of ethylene synthesis (AOA). It was found out that the aerenchyma formation depended on light conditions and that the lysigenous intercellulars intercellular spaces colocalized with areas with cells with characteristically fragmented nuclear DNA (TUNEL-positive nuclei). In experiments using the TUNEL reaction it was necessary to determine new dilution of the enzymatic mixture for the examined plant material. Only the observation of surface planes of free-hand root sections was considered relevant in both TUNEL-TMR and TUNEL-AP assays. TUNEL-AP...
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Accumulation of selected risk elements in plants growing in constructed wetlands for wastewater treatment.
VANČUROVÁ, Ivana
The aim of this bachelor work is to provide a literature survey aimed at the accummulation of risk elements by plants growing in constructed wetlands. The results of the survey revealed that less than 2% of the inflowing amount of risk element sis sequestered in the aboveground reed biomass. The highest concentrations were measured in roots while relatively low concentrations were found in rhizomes and aboveground biomass. Concentrations in Phragmites roots were usually higher than those in Schoenoplectus. The accumulation of risk elements was the highest during winter for Phragmites and in autumn for Schoenoplectus. Both plant species were found to be root accumulators of Pb, Cu, Mn, Ni, Zn and Cd.
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Collection of aquatic and wetland plants, Institute of Botany, Academy of Sciences of the Czech Republic, Třeboň
Navrátilová, Jana ; Husák, Štěpán ; Adamec, Lubomír ; Dvořáková, Kateřina
The Collection of Aquatic and Wetland Plants of the Institute of Botany AS CR in Třeboň was founded in 1976 with the aim to enable ex situ studies of threatened plant species. Since that time the Collection has provided plant material for experiments, repatriation of threatened species, taxonomical studies, and botanical illustrations for the compendium Flora of the Czech Republic. It is also used as an educational collection for university students and public. Since 1998, the seeds from the Collection (about 150–200 species each year) have been collected and offered for exchange to other institutions and botanical gardens within the Index Seminum. The Collection of Aquatic and Wetland Plants is located in the Section of Ecology of the Institute of Botany in Třeboň on an area of about 0.04 ha and its current design come from 1997. The Collection includes more than 400 species grown in outdoor containers and in a greenhouse. The overwhelming majority of these species are native to the Czech Republic; the others are mainly from other parts of the northern temperate zone. The Collection of Aquatic and Wetland Plants is the largest collection of living higher aquatic and wetland plants in Europe and one of the largest collections in the world.
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