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Pięć wieków wymiany flor synantropijnych między Starym i Nowym Światem [Five centuries of exchange of synanthropic flora between the Old and the New World]
Jan Kornaś
The 500th anniversary of the first Christopher Columbus journey to America (in 1492) brings to mind – among other things – the high geobotanical importance of this fact. It opened the possibilities of migrations of plants and animals between Europe (with Asia) and the New World. The exchange of species through the Ocean includes useful plants introduced intentionally, and a great number of species introduced accidently by various means of transportation. The author discusses the consequences of those migrations and some general rules connected with them: exchange of synanthropic plants between the regions with analogous climatic conditions, the higher number of introduced species in North America than in Europe, particular biological features of migrating species, sites of their settlement and dependence upon anthropogenic disturbances, processes of adaptive evolution. In the conclusion the importance of investigations concerning the exchange of components of synanthropic flora between Europe and America is discussed.
Słowa kluczowe: post-columbian plant migrations, synanthropic flora, invasive plants, Europe, North America
Strony: 11-19
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Roślinność – strefy przejścia i granice [Vegetation – transitional zones and boundaries]
Halina Ratyńska, Wojciech Szwed
Recently an increase of interest in transitional zones and boundaries is observed. This article presents the review of literature giving the definitions, opinions and trends of investigations, especially of transitional zones and boundaries between plant communities, their complexes and units of geocomplexes (“a structure composed of elements and of relations between them. It is not considered synonimous with ecosystem, but as a carrier or linkage of ecosystems. It can be described further by its external appearance, internal biological, chemical and physical processes, and the intera – and interactions of internal and external properties, plus the cultural, e.g. technical, input of man.” [11]). At present, one treats ecotone as a transition zone between ecological systems. Such organizations can have a zonal or mosaic character. The other form of spatial system, with not sharp outlines, characterized by a transitional stage between neighbouring communities, is ecocline. And the vegetation continuum is treated as an uninterrupted population sequence, but not as a mosaic of separate units. This review does not enclose the whole problem of boundaries and transitional zones but gives the overview of the topic.
Słowa kluczowe: review, transitional zones, ecotone, ecocline, continuum
Strony: 21-28
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Ewolucja strategii życiowych Glomales [Evolution of life stiategies in Glomales]
Ewa Ślusarczyk
The paper presents an overview on arbuscular mycorrhizal fungi from the point of life strategies. The hypotheses on the origin of the mutualistic symbiosis between plants and fungi are presented and discussed. According to them the arbuscular mycorrhiza arose from the symbiotic contact of two partners that was either parasitic or saprophytic. The consequences of the lack of sexuality in fungal symbiont are discussed.
Słowa kluczowe: Glomales, Zygomycetes, arbuscular mycorrhiza, plant strategies
Strony: 29-35
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Mutanty fotomorfogenetyczne [Photomorphogenic mutants]
Agnieszka Nowakowska, Andrzej Tretyn
The phytochrome is the photoreceptor responsible for initiating many of the photomorphogenic events. The signal transduction pathways, leading from the perception of light to the modification of gene expression have been relatively unknown until recently, when several types of mutants have been introduced for studies on plant photomorphogenesis. So far a few types of phytochrome mutants have been characterised: between them mutants probably deficient in all types of phytochrome (so-called chromophore mutants), as well as labile (phyA) or stabile (phyB) phytochrome deficient mutants. Other type of photomorphogenic mutants exhibit exaggerated phytochrome responses. Recently mutants which possesses light-grown phenotypes in darkness were also identified.
Słowa kluczowe: phytochrome, photomorphogenic mutants, photomorphogenesis
Strony: 37-51
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Portrety botaników polskich [Portraits of Polish botanists]
Strony: 53-54
Stanisław Batys Górski
Piotr Köhler
Aniela Kozłowska
Piotr Köhler
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Rozstania [Obituaries]
Strony: 55-56
Doc. dr Leszek Michalski
Marian Michniewicz
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Rocznice, jubileusze [Anniversaries, jubilees]
Strony: 56-57
Pro-memoria (I. Czartoryska, J. Pabreż, Z. Hałatkiewicz, W. Boberski, H. Krzemieniewska, A. Nespiak)
Alicja Zemanek
130. rocznica powstania Komisji Fizjograficznej Akademii Umiejętności [130th anniversary of establishing of the Physiographical Commission of the Academy of Sciences and Letters]
Piotr Köhler
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Sprawozdania ze spotkań naukowych [Scientific meeting reports]
Strony: 57-64
Konferencja Brytyjskiego Towarzystwa Ekologicznego: “Nowe osiągnięcia w zakresie ochrony przyrody i kształtowania siedlisk na terenach miejsko-przemysłowych” (Leicester, Wielka Brytania, 20-22 marca 1995) [The British Ecological Society Conference: “Recent advances in urban and post-industrial wildlife conservation and habitat creation” (Leicester, Great Britain, 20-22 March 1995)]
Barbara Tokarska-Guzik
Międzynarodowe Sympozjum: “Nowe aspekty badań nad prehistorycznym środowiskiem i rolnictwem w Europie” (Wilhelmshaven, Niemcy, 17-21 maja 1995) [Symposium: “New aspects on prehistoric environment and agriculture in Europe” (Wilhelmshaven, Germany, 17-21 May 1995)]
Małgorzata Latałowa
Międzynarodowe spotkanie robocze: “Stosunek współczesnych spektrów powierzchniowych do roślinności i krajobrazu jako pomoc w interpretacji diagramów pyłkowych (Guö, Blekinge, południowa Szwecja, 10-13 czerwca 1995) [Workshop on “Quantification of land surfaces cleared from forest during the Holocene – Modern pollen/vegetation/landscape relationships as an aid to the interpretation of fossil pollen data” (Guö, Blekinge, South Sweden, 10-13 June 1995)]
Małgorzata Latałowa
X Sympozjum Międzynarodowej Grupy Roboczej Paleoetnobotaniki (Innsbruck, Austria, 11-18 czerwca 1995) [10th Symposium of the International Work Group for Palaeoethnobotany (Innsbruck, Austria, 11-18 June 1995)]
Joanna Jarosińska, Małgorzata Latałowa
“Perspektywy pteridologii” – Sympozjum z okazji 100 rocznicy urodzin Profesora R. E. Holttuma (Ogród Botaniczny Kew, Wielka Brytania, 17-21 lipca 1995) [“Pteridology in perspective” R. E. Holttum memorial pteridophyte symposium (Royal Botanic Gardens, Kew, Great Britain 17-21 July 1995)]
Elżbieta Zenkteler
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Z życia PTB [Polish Botanical Society News]
Strony: 64-66
Piąta Sesja Terenowa Sekcji Mikologicznej (Zielonka koło Poznania, 19-22 września 1995) [5th Field Session of the Mycological Section of the Polish Botanical Society (Zielonka near Poznań, Poland, 19-22 September 1995)]
Anna Bujakiewicz
Zebranie Sekcji Historii Botaniki (Kraków, 23 listopada 1995) [Meeting of the Section of History of Botany (Kraków, 23 November 1995)]
Piotr Köhler
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Varia
Strony: 66-67
Leksykon botaników polskich [Dictionary of Polish botanists]
16. Kazimierz Filip Wize
Cezary W. Domański
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Nowe periodyki i serie [New periodicals and series]
Strony: 67-69
Trends in Genetics; Hladnikia
Jan J. Wójcicki:
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Muzea, archiwa, zbiory [Museum, archives, collections]
Strony: 69-73
Zielnik Seweryna Udzieli [Herbarium of Seweryn Udziela]
Piotr Köhler
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Polemiki i dyskusje [Polemics and discussions]
Strony: 73-76
Czy Jan Komaś może być uważany za recenzenta Flory roślin naczyniowych Lubelszczyzny? [May Jan Kornaś be considered a reviewer of Vascular plant flora of Lublin region?]
Anna Medwecka-Komaś
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Recenzje [Book reviews]
Strony: 76-80
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Nadchodzące spotkania [Forthcoming meetings]
Strony: 80-82
Jan J. Wójcicki
