Wyniki wyszukiwania

1

Formation of the oral apparatus in the absence of macronuclear anlage differentiation during sexual reproduction in Paramecium tetraurelia

100%

Ng S. F., Newman A.

Acta Protozoologica

|

1987

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tom 26

|

nr 3

2

Fertilization in angiosperms - how much different from the fertilization in animals?

86%

Mol R.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2016

|

tom 58

|

nr 1

3

Non-functional embryo sacs in apomictic and sexually reproducing plants

86%

Czapik R.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2005

|

tom 47

|

nr 1

4

Proteomics of anther and pollen development in tomato and Arabidopsis

86%

Sawhney V. K., Sheoran I. S., Sproule K.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2005

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tom 47

|

nr 1

5

Molecular basis of sexual plant reproduction in Angiospermae

86%

Bednarska E., Piecinski S., Zienkiewicz K., Niedojadalo K., Smolinski D. J.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2008

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tom 50

|

nr 1

6

Effects of sexual reproduction on growth and vegetative propagation in Arum maculatum L. [Araceae]: in-situ removal experiments

86%

Bilgin A., Kilinc M., Kutbay H. G., Yalcin E., Huseyinova R.

Polish Journal of Ecology

|

2009

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tom 57

|

nr 2

261-268

We investigated the effects of sexual reproduction on vegetative propagation and relative somatic cost in Arum maculatum L. (Araceae). Two groups were selected as control and experimental. The spadices of individuals in experimental group were removed to test the relationship between sexual reproduction and vegetative propagation. Statistically significant differences were found between initial and final tuber weight in individuals with sexual organs removed. No significant differences were found between initial and final tuber weight in naturally reproducing (sexual organs not removed) individuals. However, the statistically significant differences were found between control and experimental group with respect to above-ground biomass but not in terms of below-ground biomass. The differences between two groups in terms of above-ground and below-ground nitrogen concentrations were also significant. Relative somatic cost of sexual reproduction (RSC) was observed in above-ground parts, but not in below-ground parts in terms of biomass and in both above- and below-ground parts in terms of nitrogen concentration.

7

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Some aspects of symplasmic communication during somatic embryogenesis of tree fern Cyathea delgadii

86%

Wrobel-Marek J., Grzyb M., Kurczynska E., Rybczynski J., Mikula A.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2015

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tom 96

|

nr 1

8

Sexuality of Phytophthora infestans and the role of oospores as a primary infection source of potato late blight

86%

Zarzycka H., Sobkowiak S.

Journal of Plant Protection Research

|

1999

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tom 39

|

nr 2

Results of experiments with isolates A1 and A2 from populations occurring in Poland in the years 1993-1998 were compared. Mating types A1 and A2 did not significantly differ with respect of virulence spectrum, pathogenicity level and virulence diversity (Shannon index). After pairing isolates A1 and A2 formed oospores; their morphological characteristics were described. On selected fields a test was performed whether the oospores could play a role as a source of primary infection. Local populations occurring on three fields were characterized. Results obtained on investigated 3 separate fields, located in 2 voivodeships of southern Poland were compared. It was stated on the basis of the proportion of both mating type isolates, race complexity and diversity, that oospores could play a role as a source of primary infection, at least in one of localities in Boguchwała, podkarpackie voivodeship.

9

Signal exchange between cells during progamic phase in flowering plants

72%

Sniezko R.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2008

|

tom 50

|

nr 1

10

Genetic diversity and spatial genetic structure of Stellaria holostea populations from urban forest islands

72%

Wodkiewicz M., Gruszczynska B.

Acta Biologica Cracoviensia. Series Botanica

|

2014

|

tom 56

|

nr 1

11

Preliminary results on studies of in vivo and in vitro sexual reproduction of Salix viminalis L.

72%

Zenkteler M., Wojciechowicz M., Bagniewska-Zadworna A., Jezowski S.

Dendrobiology

|

2003

|

tom 50

In vivo and in vitro self-pollination of whole pistils of some clones of Salix viminalis enabled to obtain mature seeds containing cotyledonary embryos which after the transfer to MS medium developed into wholly formed seedlings. Pollination in vitro of placentae led to abundant pollen germination and formation of tubes which occasionally they were entering the ovules through micropyle. Fertilized ovules normally developed into germinable seeds. Distant pollination of stigmas in vivo and in vitro with pollen grains of Populus tremula, P.tomentosa, P. lasiocarpa showed the ability of pollen to germinate and to form tubes several hours after pollination. Some tubes penetrated the styles but did not enter into the placenta. When placentae were directly pollinated than pollen germinated abundantly and occasionally pollen tubes were found entering the micropyle. Embryological analysis of those ovules performed 3-5 days after pollination demonstrated the presence of globular embryos with several endosperm nuclei. The technique of in vitro placental pollination works well for Salix viminalis and it could probably be applied to other Salix species.

12

Interactions with the environment during plant sexual reproduction and dispersal consequences for the concept of sexual reproduction and life

72%

Willemse M. T. M.

Acta Biologica Cracoviensia. Series Botanica

|

2005

|

tom 47

|

nr 1

The interaction between seed plants and animals during pollination and fruit and seed dispersal is well known, and marks the sexual reproduction process. During the history of the plant kingdom, the development of sexual reproduction has been governed by changes in the environment of the plant, together with the increasing complexity of organisms. The interactions between gametes and the environment are prepared during gametogenesis, and therefore reproduction and dispersal are related from the beginning. The dynamic environment should be considered as an interactive partner. The more intensive interactions in multicellular organisms make the interaction in seed plants far more complex. Sexual reproduction plays a key role in the progress of the interaction between the dynamic environment and the biosphere. Sexual reproduction embodies the renewal and dispersal of organisms. This means that the interactions between organisms and their environment are not only an essential element of sexual reproduction but also a characteristic of life, based on the unity of organism and environment. The driving force of the increasing complexity of life is the dynamic environment and the persisting organism.

13

Cell cycle of zygote and possible types of caryogamy in flowering plants

72%

Vasilyeva V. E., Batygina T. B.

Bulletin of the Polish Academy of Sciences. Biological Sciences

|

1997

|

tom 45

|

nr 2-4

14

Studies of mould fungi in the aerosphere of the H.Arctowski Polar Station

72%

Bialasiewicz D., Czarnecki B.

Wiadomości Parazytologiczne

|

1998

|

tom 44

|

nr 3

15

Plant sexual reproduction: Aspects of interaction, history and regulation

72%

Willemse M. T. M.

Acta Biologica Cracoviensia. Series Botanica

|

2003

|

tom 45

|

nr 1

Sexual reproduction in angiosperms is an interactive process involving the sporophyte, gametophytes, embryo and endosperm as well as the environment, aimed at achieving pollination, fertilization and dispersal. This interaction occurs via an interface with nutrients and signals outside the cell and even outside the plant. Sexual reproduction has a history. In water, algae have different types of sex organs and gametes, and in some cases the female gamete stays on the plant. The zygote uses water movement and gravity for dispersal. Some algae have alternation of generations in the life cycle, and only the gametophyte functions in sexual reproduction. On land, ferns and mosses inherited alternation of generations, with oogamy and zygote development on the gametophyte, with wind dispersal of the meiospore. In angiosperms, heterospory and the retention of the megaspore, megagametophyte and embryo on the sporophyte lead to a seed with gravity and biotic dispersal. The history of sexual reproduction is based on sex determination, due to cross-fertilization and recombination. Sex differentiation is manifested in the increasing complexity of interaction in the nutrient supply, the retention of the gametophyte or even the embryo, and the type of vector of dispersal. Regulation of sexual reproduction in angiosperms is governed mainly by the sporophyte, with the expression of new genes for biotic pollination and seed dispersal. In the heterotrophic gametophyte some gene expression is suppressed. The development of sexual reproduction is due to the communication between the organism and a dynamic environment.

16

Bidirectional pollination of angiosperm and gymnosperm ovules

72%

Zenkteler M., Relska-Roszak D.

Acta Biologica Cracoviensia. Series Botanica

|

2003

|

tom 45

|

nr 1

Pollen grains of Pinus wallichiana, P. mugo, P. ponderosa and Ephedra distachya germinated at various intensities on in vitro cultured placentas of 32 angiosperm species. Pollen of the same gymnosperms did not form tubes on stigmas of pistils cultured under the same conditions as the placentas. Pollen of several angiosperms germinated on semi in vitro cultured opened ovules of Larix decidua and nucelli of Taxus baccata. Angiosperm pollen did not germinate in vivo in the pollination drop secreted by ovules of T. baccata. This report shows that (1) gymnosperm pollen produces fully formed tubes on ovules of angiosperms but do not germinate on their stigma, and (2) pollen representing angiosperms is able to germinate and form tubes on ovules of gymnosperms.

17

Screening for mutations affecting sexual reproduction after activation tagging in Arabidopsis thaliana

72%

Perrella G., Cremona G., Consiglio F., Errico A., Bressan R. A., Conicella C.

Journal of Applied Genetics

|

2006

|

tom 47

|

nr 2

In this work, a seed-set-based screening was performed on 70 lines of Arabidopsis thaliana after activation tagging mutagenesis to identify mutations in reproductive mechanisms. Five mutants showed significantly lower seed set than the wild type and confirmed the phenotype in the progeny. This phenotype was linked with the marker gene bar carried by T-DNA conferring glufosinate resistance. Genetic analysis revealed that the mutation inheritance was sporophytic in 3 mutants and gametophytic in 2 mutants. In addition, 2 mutants had an extra T-DNA copy. Thus activation tagging can be an effective strategy to identify new mutations affecting sporogenesis or gametogenesis.

18

Sexual reproduction of Phragmites australis [Poaceae] in Baczkowski pond [Poznan, Poland] revealed by peroxidase polymorphism

72%

Krzakowa M., Drapikowska M.

Biological Bulletin of Poznań

|

2000

|

tom 37

|

nr 1

19

Calreticulin expression in relation to exchangeable Ca2plus level that changes dynamically during anthesis, progamic phase, and double fertilization in Petunia

58%

Lenartowski R., Suwinska A., Lenartowska M.

Acta Biologica Cracoviensia. Series Botanica. Supplement

|

2014

|

tom 56

|

nr 1

20

Genetic constitution of parthenogenetic form of Polydrusus inustus [Coleoptera: Curculionidae] - hints of hybrid origin and recombinations

58%

Kajtoch L., Lachowska-Cierlik D.

Folia Biologica

|

2009

|

tom 57

|

nr 3-4

149-156

Ograniczanie wyników

Formation of the oral apparatus in the absence of macronuclear anlage differentiation during sexual reproduction in Paramecium tetraurelia

Fertilization in angiosperms - how much different from the fertilization in animals?

Non-functional embryo sacs in apomictic and sexually reproducing plants

Proteomics of anther and pollen development in tomato and Arabidopsis

Molecular basis of sexual plant reproduction in Angiospermae

Effects of sexual reproduction on growth and vegetative propagation in Arum maculatum L. [Araceae]: in-situ removal experiments

Some aspects of symplasmic communication during somatic embryogenesis of tree fern Cyathea delgadii

Sexuality of Phytophthora infestans and the role of oospores as a primary infection source of potato late blight

Signal exchange between cells during progamic phase in flowering plants

Genetic diversity and spatial genetic structure of Stellaria holostea populations from urban forest islands

Preliminary results on studies of in vivo and in vitro sexual reproduction of Salix viminalis L.

Interactions with the environment during plant sexual reproduction and dispersal consequences for the concept of sexual reproduction and life

Cell cycle of zygote and possible types of caryogamy in flowering plants

Studies of mould fungi in the aerosphere of the H.Arctowski Polar Station

Plant sexual reproduction: Aspects of interaction, history and regulation

Bidirectional pollination of angiosperm and gymnosperm ovules

Screening for mutations affecting sexual reproduction after activation tagging in Arabidopsis thaliana

Sexual reproduction of Phragmites australis [Poaceae] in Baczkowski pond [Poznan, Poland] revealed by peroxidase polymorphism

Calreticulin expression in relation to exchangeable Ca2plus level that changes dynamically during anthesis, progamic phase, and double fertilization in Petunia

Genetic constitution of parthenogenetic form of Polydrusus inustus [Coleoptera: Curculionidae] - hints of hybrid origin and recombinations