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Systematyka, ewolucja i cytogenetyka gatunków z rodzaju Avena L. [Systematics, evolution and cytogenetics of genus Avena L. species]
Edyta Paczos-Grzęda
The aim of this paper was collection of accessible information concerning taxonomy, evolution and cytogenetics of species of genus Avena L. There are a lot of controversies connected with classification of species belonging to genus Avena, evolution of these species and cytogenetics: genomic constitution, identification, nomenclature and homeology of chromosomes. In recent years many attempts were taken to resolve these problems. Modern molecular techniques of DNA analysis were often used in these purposes.
Słowa kluczowe: Avena L., systematics, evolution, cytogenetics, molecular markers
Strony: 7-17
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Ultrastruktura wiązek przewodzących w liściu oraz załadowanie floemu a ewolucja roślin okrytonasiennych [The ultrastructure of veins, phloem loading and evolution of angiospermous plants]
Paweł Sowiński
The phloem loading is the process, in which photoassimilates move from the place of synthesis, i.e. mesophyll cells into veins. It forces up the long distance transport. In spite of its role in a plant, phloem loading mechanism is still under discussion. At the begining of the last decade two types of phloem loading, apoplastic and syrnplastic mechanism were taken into consideration. The apoplastic way seems to be driven by an active uptake of sucrose from apoplast by companion cell/sieve tube complex, while the symplastic way includes polymer trapping mechanism. The given mechanism of phloem loading has been related to the type of vein ultrastructure, specific for angiosperms families. It was suggested that symplastic phloem loading mechanism may operate in plants with so called open vein ultrastructure, while apoplastic mechanism is related to closed vein ultrastructure. The evolution of vein type from the open ultrastructure to the closed one and phloem loading from symplastic to apoplastic were also hypothesized. Current discoveries, concerning different aspects of the problem: molecular, biochemical, physiological, systematic and evolutionary, suggest however, that many plants posses more than one mechanism of phloem loading. Moreover, the third type of phloem loading seems to exists, i.e. symplastic phloem loading driving by turgor pressure. The relative participation of the given mechanism may depend on the species, developmental stage, or environmental conditions. There is also no clear evolutionary trends in both vein ultrastructure and phloem loading mechanisms.
Słowa kluczowe: Anatomy, apoplast, companion cells, long distance transport, phloem loading, plasmodesmata, short distance transport, sieve tubes, symplast
Strony: 19-26
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Znaczenie aparatów szparkowych dla współdziałania wody i światła w metabolizmie roślin [The role of stomata in joint-action of water and light in plant metabolism]
Stanisław Maleszewski, Bożena Kozłowska-Szerenos, Anna Jurga
We discuss the recent findings on the regulation of stomata by the main endogenous and environmental factors including the specific effect of blue light. The review also presents the phenomenon of heterogeneity in the stomata behaviour.
Słowa kluczowe: guard cells, stomata, blue irradiation, conductance, heterogeneity in the behaviour
Strony: 27-39
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Barwniki ekranujące słoneczne promieniowanie ultrafioletowe u roślin i grzybów [Solar ultraviolet radiation screening pigments in plants and fungi]
Zbigniew Lechowski, Jan Białczyk
Plants living in open environments are exposed to the damaging solar ultraviolet radiation (UV). Taxonomically diverse water and terrestrial plants have developed the capacity to synthesize and accumulate UV-screening compounds. These compounds provide a passive method for the reduction of UV damage. Moreover, many of them also had other physiological functions, i.e. reproductive or osmotic regulation. Numerous aspects of plant UV-screening compounds such as their distribution, physiological role, and structure are characterized in this review.
Słowa kluczowe: UV radiation, UV protection, screening pigments
Strony: 41-54
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Portrety botaników polskich [Portraits of Polish botanists]
Strony: 55-56
Jan Walas
Alicja Zemanek
Jan Kornaś
Alicja Zemanek
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Rozstania [Obituaries]
Strony: 57-63
Wspomnienie o prof. dr Alicji Szweykowskiej (1926-2002) [A remembrance of Professor Alicja Szweykowska (1926-2002)]
Grzegorz Jackowski
Profesor Jerzy Szweykowski: życie i dzieło (1925-2002) [Professor Jerzy Szweykowski: life and work (1925-2002)]
Wiesław Prus-Głowacki
Przemówienie wygłoszone na uroczystym posiedzeniu Senatu Uniwersytetu im. A. Mickiewicza w dniu 15 listopada 2002 r. [Address given at the celebrated meeting of the Senate of the Adam Mickiewicz University in Poznań on 15 November 2002]
Zbigniew Mirek
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Rocznice, jubileusze [Anniversaries, jubilees]
Strony: 63-67
Jubileusz Białowieskiej Stacji Geobotanicznej Uniwersytetu Warszawskiego [Jubilee of Geobotanical Station of the Warsaw University in Białowieża]
Zbigniew Mirek
Pro memoria (J. Liboszyc, W. H. Gawarecki, W. Grzegórzek, E. A. Janota, W. Tyniecki, T. Symonowiczówna, M. Twardowska, W. R. Łoś, O. Seidl, W. Urbański, W. Schramm, J. Jentys-Szaferowa, W. Wróbel-Stermińska)
Alicja Zemanek
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Sprawozdania ze spotkań naukowych [Scientific meeting reports]
Strony: 67-88
Międzynarodowe Sympozjum Pteridologiczne pod patronatem Komisji Ochrony Gatunkowej (SSC) Międzynarodowej Unii Ochrony Przyrody (IUCN) (Guildford, Wielka Brytania, 23-26 czerwca 2001) [International Pteridological Symposium under the auspices of the Species Survival Commission (SSC) IUCN “Fern Flora Worldwide: Threat and Responses” (Guildford, UK, 23-26 July 2001)]
Elżbieta Zenkteler
6. Konferencja Międzynarodowego Towarzystwa Badań Korzeni (Nagoja, Japonia, 11-15 listopada 2001) [6th Symposium of the International Society of Root Research (Nagoya, Japan, 11-15 November 2001)]
Sławomir Samardakiewicz
“Woda i światło w życiu roślin” – Jubileuszowa Sesja Naukowa poświęcona 95. rocznicy urodzin prof. Piotra Strebeyko (Warszawa, 8 czerwca 2002) [„Water and light in plants life” – Jubilee scientific session devoted to 95th anniversary of Professor Piotr Strebeyko birthday (Warsaw, Poland, 8 June 2002)]
Zofia Starck
XXVI Krajowa Konferencja Naukowa z cyklu “Rejonizacja chwastów segetalnych w Polsce” – Rośliny segetalne jako bioindykatory (Ustka, 20-21 czerwca 2002) [26th National Scientific Conference “Regionalization of segetal weeds in Poland” – Segetal plants as bioindicators (Ustka, Poland, 20-21 June 2002)]
Izabela Ratuszniak, Zbigniew Sobisz
VII Międzynarodowy Kongres Aerobiologiczny (Château Montebello, Kanada, 5-9 sierpnia 2002) [7th International Congress on Aerobiology “Aerobiology: Corning of age in a New Millennium” (Château Montebello, Canada, 5-9 August 2002)]
Danuta Stępalska
7. Międzynarodowy Kongres Mikologiczny (Oslo, Norwegia, 11-17 sierpnia 2002) [7th International Mycological Congress (Oslo, Norway, 11-17 August 2002)]
Anna Ronikier, Wiesław Mułenko, Janusz Łuszczyński
XV Sympozjum Nadbałtyckich Mikologów i Lichenologów (Birštonas, Litwa, 26-30 września 2002) [15th Symposium of Baltic Mycologists and Lichenologists (Birśtonas, Lithuania, 26-30 September 2002)]
Dominika Seta, Anna Łubek
Druga Międzynarodowa Konferencja Anatomii i Morfologii Roślin (Sankt Petersburg, Rosja, 14-18 października 2002) [Second International Conference on Plant Anatomy and Morphology (Saint-Petersburg, Russia, 14-18 October 2002)]
Marzenna Guzicka, Karol Latowski, Adam Woźny
V Ogólnopolskie Spotkanie Naukowe “Taksonomia, kariologia i rozmieszczenie traw w Polsce” (Kraków, 14-15 listopada 2002) [5th National Scientific Meeting “Taxonomy, karyology and distribution of grasses in Poland” (Kraków, Poland, 14-15 November 2002)]
Ludwik Frey, Marta Mizianty
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Botanika za granicą [Botany Abroad]
Strony: 88-90
Czasopisma Brytyjskiego Towarzystwa Pteridologicznego [The British Pteridological Society periodicals]
Elżbieta Zenkteler
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Z życia PTB [Polish Botanical Society News]
Strony: 90-95
Pierwsi laureaci Medalu im. Zygmunta Czubińskiego [The Zygmunt Czubiński Medal first winners]
Karol Latowski
Zebranie Sekcji Historii Botaniki PTB (Kraków, 26 listopada 2002) [Meeting of the Section of History of Botany of the Polish Botanical Society (Kraków, Poland, 26 November 2002)]
Piotr Köhler
XIX Konkurs dendrologiczny w Łodzi pod hasłem “Znam drzewa i krzewy” [19th Dendrological Competition “I know trees and shrubs” in Łódź]
Magdalena Antczak, Liliana Różycka, Jan T. Siciński
III Konkurs Dendrologiczny “Znam drzewa i krzewy” w Częstochowie [Third Dendrological Competition “I know trees and shrubs” in Częstochowa]
Andrzej Grzyl
“Czwartki botaniczne” w Oddziale Krakowskim PTB w 2002 roku [“Botanical Thursdays” at the Polish Botanical Society, Cracow Division, in 2002]
Jolanta Cabała
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Varia
Strony: 96-101
Początki badań flory glonów Lubelszczyzny [Early studies on algal flora of Lublin District]
Magdalena Pogorzelec, Agnieszka Szczurowska
Leksykon botaników polskich: 45. Edward Majewski [Dictionary of Polish botanists: 45. Edward Majewski]
Piotr Köhler
Leksykon botaników polskich: 46. Tadeusz Joachim Bukowski [Dictionary of Polish botanists: 46. Tadeusz Joachim Bukowski]
Jan Szymański
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Nowe periodyki i serie [New periodicals and series]
Strony: 101-103
Mycological Progress
Anna Ronikier, Michał Ronikier
Turczaninowia
Karol Latowski
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Recenzje [Book reviews]
Strony: 103-120
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Nadchodzące spotkania [Forthcoming meetings]
Strony: 121-122
Jan J. Wójcicki
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Literatura botanicza
Strony:122-123
Jan J. Wójcicki