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Słowacko-polska współpraca w botanice – retrospektywne spojrzenie przy końcu stulecia [Slovak-Polish cooperation in botany – a retrospective look at past at the turn of centuries]
Kamila Zahradníková, Olga Erdelská, Kamila Bacigálová, Frantisek Hindák, Ivan Hrabovec, Peter Paulech, Ivan Pišút, Helena Šipošová
The article gives a survey of Slovak -Polish contact and cooperation in botany of the 20th century.
Słowa kluczowe: history, botany, Poland, Slovakia, cooperation
Strony: 7-22
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Rola Ca2+ w płciowym rozmnażaniu roślin okrytonasiennych [The role of Ca2+ in sexual reproduction of angiosperm plants]
Elżbieta Bednarska, Marta Lenartowska
Sexual reproduction includes a number of processes requiring cellular signalling. An important role in the cell signalling both in animals and in plants is played by Ca2+ ions. The part of Ca2+ in generative reproduction of plants,particularly angiosperms, is still insufficiently understood. However, research in the last decade has supplied some data suggesting that, like in animals, an important role in those processes is played by Ca2+ ions. Our paper presents the current state of knowledge concerning the widely understood part of calcium in the generative reproduction of angiosperms. The part of Ca2+ in the phenomena specific of that group of organisms have been discussed (such as the production and development of the gamethophyte, germination of pollen grains, the directional transport of sperm cells into the embryo sac) as well as processes common to all sexually reproducing organisms: recognition of the gametes and fertilization. Our objective is to show in which phenomena the role of calcium is already understood, in which it needs further studies, and in which it is still in the sphere of hypotheses owing to lack of convincing experimental evidence.
Słowa kluczowe: Ca2+ , sexual reproduction, male and female gametophyte, pollen, pollen tube, fertilization
Strony: 23-34
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Wpływ czynników zewnętrznych na wzrost sinic i syntezę toksyn [Effect of the external factors on cyanobacteria growth and synthesis of toxins]
Ewa Mej, Zbigniew Lechowski
The cyanobacteria water blooms are a frequent and common phenomenon, particularly in eutrophic water bodies. The knowledge of the response of various cyanobacteria species to environmental conditions may contribute to the limitation of dynamically developing water blooms dangerous for living organisms. This is the most important that the microcystins can occur at low concentrations in the water several weeks after the disappearance of the blooms. Different strains even of the same species of cyanobacteria frequently manifest a different response to the action of the same external factors. In similar conditions of growth they produce various quantities of the same types of toxins. The same strains of cyanobacteria can produce different types of toxins with various doses of the applied factor (e.g. the temperature or PAR). The optimum conditions of growth of cyanobacteria are not always optimal for the synthesis of toxins. The results of laboratory experiments obtained by different authors and concerning the same strains frequently differ to a great degree, probably owing to methodological differences e.g. the use of different media, irradiation sources, methods of toxin measurements, or units of biomass and toxin determination. Laboratory experiments concentrated on the effects of a single factor on the synthesis of toxins can not be directly referred to natural conditions, where the mutual relations occur in an entire complex of external factors. In spite of numerous unknown elements one is not disputable: changes in the conditions of growth do not induce non-toxic strains to the synthesis of toxins. Similarly they do not inhibit this kind of synthesis in strains potentially able to carry it out.
Słowa kluczowe: cyanobacteria, elements, light and temperature conditions, toxins
Strony: 35-49
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Portrety botaników polskich [Portraits of Polish botanists]
Strony: 51-52
Aniela Kozłowska (1898 – 1981)
Piotr Köhler
Józef Ignacy Łagowski (1820 – 1870)
Andrzej Chlebicki
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Rozstania [Obituaries]
Strony: 53-59
Maria Fiedotjew-Jesse (27 II 1912 – 28 I 1985)
Anna Bujakiewicz
Doc. dr Witold Czerwiński (13 VIII 1922 – 26 III 1998)
Krzysztof Bielecki
Wspomnienie o naszym Mistrzu, Profesorze Tadeuszu Kimsie (1947-1999) [A rememberance ofour Master, Professor Tadeusz Kimsa (1947-1999)]
Anna Orczewska, Edyta Sierka
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Rocznice, jubileusze [Anniversaries, jubilees]
Strony: 59-63
100. rocznica urodzin prof. dr Stefana Macki (1899-1967) [100th anniversary of Prof. Stefan Macko’s birth (1899-1967)]
Henryk Urbanik
Sesja z okazji 260. rocznicy urodzin ks. Krzysztofa Kluka (1739-1796) [Session on 260th anniversary of Rev. Krzysztof Kluk birth (1739-1796)]
Adam Wołk
Pro memoria (Marcin z Urzędowa, W. Pampuch, A. Podymowicz, H. Spiczyński, A. Jabłonowska, I. Czartoryska, M. Szubert, J. K. Działyński, F. Błoński, I. Szyszyłowicz, M. Czubińska, J. Szotkowski, E. Massalski)
Alicja Zemanek
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Sprawozdania ze spotkań naukowych [Scientific meeting reports]
Strony: 63-71
XIII Kongres Europejskich Mikologów (Alcala de Henares (Madryt), Hiszpania, 21-25 września 1999) [13th Congress of European Mycologists (Alcalá de Henares (Madrid), Spain, 21-25 September 1999)]
Alina Skirgiełło, Maria Ławrynowicz
Dynamika procesów fizjologicznych systemów korzeniowych drzew – II Międzynarodowe Sympozjum (Nancy, Francja, 26-30 września 1999) [Dynamics of Physiological Processes in Woody Roots – 2nd International Symposium (Nancy, France, 26-30 September 1999)]
Juliusz Unrug
Ekologia obcych roślin inwazyjnych – V Międzynarodowa Konferencja (La Maddalena, Sardynia-Włochy, 13-16 października 1999) [5th International Conference on the Ecology of Invasive Alien Plants (La Maddalena, Sardinia-Italy, 13-16 October 1999)]
Maria Zając
VIII Konferencja “Zasoby przyrodnicze Międzynarodowego Rezerwatu Biosfery Karpaty Wschodnie i ich ochrona” (Ustrzyki Dolne, 14-16 października 1999) [8th Conference “Natural resources of the International Biosphere Reserve – Eastern Carpathians and their protection” (Ustrzyki Dolne, Poland, 14-16 October 1999)]
Józef Mitka
II Ogólnopolska Konferencja Naukowo-Techniczna “Trawy w procesie rekultywacji i zagospodarowania terenów trudnych” (Ustroń-Jaszowiec, 14-15 października 1999) [2nd National Scientific-Technical Conference “Grasses in the process of biological renovation and managing of degraded areas” (Ustroń-Jaszowiec, Poland, 14-15 October 1999)]
Ludwik Frey
Warsztaty nt. systemu informacji o kolekcjach biologicznych w Europie (Szczecin, Dziwnówek, 26-27 listopada 1999) [Workshop “Access to Biological Collection Information in Poland – a European Perspective” (Szczecin, Dziwnówek, Poland, 26-27 November 1999)]
Sławomir Florjan
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Z życia PTB [Polish Botanical Society News]
Strony: 71-77
Czasopisma Polskiego Towarzystwa Botanicznego [The Polish Botanical Society as a publisher]
Krystyna Czyżewska
Strona internetowa Polskiego Towarzystwa Botanicznego – http://ptb.ib-pan.krakow.pl [Web Page of Polish Botanical Society – http://ptb.ib-pan.krakow.pl]
Alina Stachurska-Swakoń
Czwartki botaniczne w Oddziale Krakowskim PTB w IV kwartale 1999 r. [Botanical Thursdays at the Polish Botanical Society, Cracow Division, in the 4th quarter of 1999]
Sławomir Florjan
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Varia
Strony: 77-86
Porosty – zagrożone partnerstwo (wystawa w Słowackim Muzeum Narodowym w Bratysławie) [Lichenes – endangered partnership (an exhibition in Slovak National Museum in Bratislava)]
Laura Betleja, Urszula Bielczyk
Program komputerowy do pomiarów biometrycznych [Computer programme for biometrical measurements]
Elżbieta Cieślak, Jakub Cieślak
Leksykon botaników polskich: 33. Maria Feliksa Stanisława (Amouraux) Kozłowska [Dictionary of Polish botanists: 33. Maria Feliksa Stanisława (Amouraux) Kozłowska]
Piotr Köhler
Leksykon botaników polskich: 34. Stanisława Antonina (Bulanda) Pawłowska [Dictionary of Polish botanists: 34. Stanisława Antonina (Bulanda) Pawłowska]
Piotr Köhler
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Nowe periodyki i serie [New periodicals and series]
Strony: 86-87
Jan J. Wójcicki
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Recenzje [Book reviews]
Strony 87-105
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Nadchodzące spotkania [Forthcoming meetings]
Strony: 105-108
Jan J. Wójcicki
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Literatura botanicza [Botanical literature]
Strony: 108-111
