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In this study we test three hypotheses. (1) Secretory hairs in the arms and the distal part of the neck of the carnivorous plant Genlisea (Lentibulariaceae) have a different principal function than the digestive hairs in the digestive chamber, that is, prey attraction. (2) Only bacteria and other organisms inside the trap and on the external trap surface lure prey. (3) Substances produced by the plant have a minor influence on prey attraction; more important is trap shape and morphology, because protozoa and microfauna may move to the small interspaces (traps or capillaries) by accidental, nonspecific wandering. We studied the structure of secretory hairs (glands) in the arms and the distal and proximal parts of the trap neck using light, fluorescence and electron microscopy. We tested the hypotheses with several experiments using sterile Genlisea traps as well as glass tubes acting as a Genlisea trap model, and various organisms as prey (Blepharisma sp., Paramecium bursaria, Euglena sp.). Hairs in the arms and the distal part of the Genlisea trap neck represent polysaccharide-protein-secreting hairs. Prey still moved to cleaned traps without chemical attractants. In the proximal part of the neck the secretory hairs have the same ultrastructure as digestive hairs in the digestive chamber of Genlisea. Sterile traps do not need commensals for catching prey. The results of the behavioral experiments reported here support the hypothesis that prey can move to the traps or capillaries by accidental, nonspecific wandering to small objects filled with water. Thus, the complex structure of the Genlisea trap with long arms may help catch prey simply by providing a large surface with many small openings which mimic the interspaces between soil particles, and the plant does not need special mediators for prey attraction.
Pinguicula vulgaris (Lentibulariaceae) in north eastern Poland. Fragmenta Floristica et Geobotanica Polonica 8: 105–111. Kraków. PL ISSN 1640 629X. ABSTRACT: Pinguicula vulgaris L. has previously been recorded from four localities in the Suwałki Lakeland in the north easternmost part of Poland, but in at least at two of these stations the species has not been observed within the last decade. A new locality for this species was discovered in June 2000 in a small fen on the left hand side of the Kunisjanka stream in the village of Berżniki south east of Sejny. This is the richest locality for P. vulgaris in this part of the country and approximately 210 individuals were observed in an area of about 100 sq. m. The locality is described in detail and accompanying vascular plants and bryophytes are enumerated. Amongst the latter, four species are of special interest, namely Paludella squarrosa, Tomentypnum nitens, Helodium blandowii and Bryum weigelii which are considered to be glacial relicts in Central Europe. The local distribution of the species in north eastern Poland is presented and a distribution map showing its range in Poland as a whole is also provided.
The term "seed pedestal" was introduced recently to describe a structure of placental origin connecting a seed with the placenta. Seed pedestals are widespread in Scrophulariaceae and a few adjacent families, but have not been found in Lentibulariaceae so far. Here their presence is reported for Utricularia reniformis from Brazil, and their formation during seed development is described. We observed that the formation of this structure was strictly associated with seed development; seed pedestals were not formed under aborted (unfertilized) ovules
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Algae commensal community in Genlisea traps

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The community of algae occurring in Genlisea traps and on the external traps surface in laboratory conditions were studied. A total of 29 taxa were found inside the traps, with abundant diatoms, green algae (Chlamydophyceae) and four morphotypes of chrysophytes stomatocysts. One morphotype is described as new for science. There are two ways of algae getting into Genlisea traps. The majority of those recorded inside the traps, are mobile; swimming freely by flagella or moving exuding mucilage like diatoms being ablate to colonize the traps themselves. Another possibility is transport of algae by invertebrates such as mites and crustaceans. In any case algae in the Genlisea traps come from the surrounding environment. Two dominant groups of algae (Chladymonas div. and diatoms) in the trap environment, show ability to hydrolyze phosphomonoseters. We suggest that algae in carnivorous plant traps can compete with plant (host) for organic phosphate (phosphomonoseters). From the spectrum and ecological requirements of algal species found in the traps, environment inside the traps seems to be acidic. However, further studies are needed to test the relations between algae and carnivorous plants both in laboratory conditions and in the natural environment. All the reported taxa are described briefly and documented with 74 LM and SEM micrographs.
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