Wyniki wyszukiwania

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Specyfika rozwoju antarktycznych roslin naczyniowych Colobanthus quitensis [Kunth] Bartl. i Deschampsia antarctica Desv.

100%

Gielwanowska I.

Rozprawy i Monografie. Uniwersytet Warmińsko-Mazurski w Olsztynie

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2005

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tom 112

1-172

2

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Development of the pollen in the Antarctic flowering plant Colobanthus quitensis [Kunth] Bartl.

100%

Gielwanowska I., Bochenek A., Szczuka E.

Acta Agrobotanica

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2007

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tom 60

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nr 2

Colobanthus quitensis (Kunth) Bartl, produced two types very small bisexual flowers. In the Antarctic natural conditions chasmogamic and cleistogamic flowers most often form five stamina with short filaments. Two microsporangia with a three-layer wall form in the anther. Microspore mother cells, which develop into microspores after meiosis, form inside the microsporangium. Microsporocytes of Colobanthus quitensis are surrounded with a thick callose layer, the special wall. After meiosis, the callose wall is dissolved and microspores are released from the tetrad. The production of proorbicules, orbicules and peritapetal membrane, and the construction of a complex sporoderm with numerous apertural sites were observed. When microspore and pollen protoplasts underwent necrosis, probably as a result of temperature and osmotic stress, sporoderm layers formed around microspores, and the cell tapetum did not disintegrate. However, woody wall layers did not accumulate in endothecium cells.

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Biologiczne przystosowania roślin kwiatowych do warunków klimatycznych Antarktyki Morskiej

80%

Gielwanowska I.

Kosmos

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2013

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tom 62

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nr 3

4

Carbohydrates in Colobanthus quitensis and Deschampsia antarctica

80%

Piotrowicz-Cieslak A. I., Gielwanowska I., Bochenek A., Loro P., Gorecki R. J.

Acta Societatis Botanicorum Poloniae

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2005

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tom 74

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nr 3

Eight to nineteen ethanol-soluble carbohydrate components were identified in vegetative tissues of Colobanthus quitensis and Deschampsia antarctica. The analysed carbohydrates included: monosaccharides, cyclitols, galactosyl cyclitols, raffinose family oligosaccharides, lichnose family oligosaccharides, kestose family oligosaccharides. The analysed vegetative tissues accumulated from 447 to 139 mg/g d.m. soluble carbohydrates in Colobanthus quitensis, Deschampsia antarctica respectively. The raffinose family oligosaccharides constituted 53.3% in Colobanthus quitensis of the identified soluble carbohydrate component pool. Vegetative tissues accumulated starch in Colobanthus quitensis 20.6 mg/g d.m. and 261.6 mg/g d.m. in Deschampsia antarctica. Anatomical and ultrastructural observations of vegetative part of Colobanthus quitensis and Deschmpsia antarctica revealed the presence of various ergastic materials in intercellular spaces, cell walls and protoplasts. Various parts of these plants contain insoluble, PAS positive polysaccharides in intercellular spaces and in cell walls. Chloroplasts of analysed tissues contained starch. Less starch was visible in young, growing parts of shoots of Colobanthus quitensis and Deschmpsia antarctica, more starch appears in mature, differentiated parts.

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Biology of generative reproduction of Colobanthus quitensis (Kunth) Bartl. from King George Island, South Shetland Islands

70%

Gielwanowska I., Bochenek A., Gojlo E., Gorecki R., Kellmann W., Pastorczyk M., Szczuka E.

Polish Polar Research

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2011

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tom 32

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nr 2

6

Tam, gdzie diabeł mówi dzień dobry! Selma Expeditions na Georgię Południową i Wyspę Słoniową

51%

Konieczny K.

Salamandra:Magazyn Przyrodniczy

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2014

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nr 1

Ograniczanie wyników

1 Acta Agrobotanica

1 Acta Societatis Botanicorum Poloniae

1 Kosmos

1 Polish Polar Research

1 Rozprawy i Monografie. Uniwersytet Warmińsko-Mazurski w Olsztynie

1 Salamandra:Magazyn Przyrodniczy

5 Gielwanowska I.

3 Bochenek A.

2 Szczuka E.

1 Gojlo E.

1 Gorecki R.

1 Gorecki R. J.

1 Kellmann W.

1 Konieczny K.

1 Loro P.

1 Pastorczyk M.

1 Piotrowicz-Cieslak A. I.

1 2014

1 2013

1 2011