Wyniki wyszukiwania

1

The mode of ray initiation affects the rate of double storied pattern formation in cambium

100%

Myskow E.

Polish Journal of Natural Sciences. Supplement

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2003

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tom 01

2

Surface expansion of the shoot apical meristem in Arabidopsis thaliana

100%

Kwiatkowska D.

Polish Journal of Natural Sciences. Supplement

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2003

|

tom 01

3

Influence of PIN1 gene mutation on the pattern of primary vasculature in Arabidopsis inflorescence shoot

72%

Banasiak A.

Polish Journal of Natural Sciences. Supplement

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2003

|

tom 01

4

Biology of edaphic microarthropods in CO2 - rich environments: an experimental design with particular regard for Collembola

72%

Tosi L., Parisi V., Raschi A., Blum H., Hendrey G.

Polskie Pismo Entomologiczne

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1995

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tom 64

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nr 1-4

5

Income situation of cereal producers on the example of wheat producers

58%

Ginter A., Szarek S.

Electronic Journal of Polish Agricultural Universities. Series Economics

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2011

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tom 14

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nr 1

6

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

The structure of floral elements of Anchusa officinalis L. creating attractants for insects

58%

Chwil M., Weryszko-Chmielewska E.

Acta Agrobotanica

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2009

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tom 62

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nr 1

The present study involved the measurement of size and the micromorphology of the floral elements of Anchusa officinalis L. which are attractants for insects. The structure of the epidermis on the surface of the calyx, petals, throat scales, pistil and nectary were analysed using light and scanning electron microscopy (SEM). For light microscopy observations, semi-permanent slides were prepared, which were treated with Lugol’s iodine solution, Sudan III and fluoroglucine. The dark violet lobes of the corolla of Anchusa officinalis, with a velvety surface, and the throat scales, contrasting with them, belong to the most important optical attractants which lure insects from large distances. The dark pink colouring of the sepals additionally increases the attractiveness of the flowers. The epidermis covering the calyx formed different-sized non-glandular trichomes as well as glandular trichomes. The glandular trichomes were composed of a uni – or bicellular leg and a unicellular head. The colour of the corolla petals was determined by anthocyanins accumulated in the epidermal cells and in the more deeply situated parenchyma. The velvety surface was formed by the conical papillae, densely growing from the adaxial epidermis. The pink-violet throat scales with white hairs, covering the inlet to the tube of the corolla, were found at the inlet to the corolla throat. The longest trichomes on the surface of the scales were located in their lower and middle parts, whereas the shortest ones at their tips. The epidermis of the central part of the throat scales formed small papillae. The trichomes had thin cell walls, large vacuoles, numerous plastids and lipid droplets. The two-parted stigma of the pistil was covered by characteristic expanded outgrowths with wavy edges which performed the functions of structures facilitating the capture of pollen grains. As a result of the present study it was found that the structures affecting the attractiveness of the flowers, through various light effects within the corolla of Anchusa officinalis, include the papillae on the corolla surface, trichomes of the throat scales and the epidermal cells of the style. The trichomes of the scales can also be responsible for protecting pollen and nectar against rainfall.

7

Copper concentration in the top plant tissue as an indicator of Cu toxicity

58%

Korzeniowska J., Stanislawska-Glubiak E.

Electronic Journal of Polish Agricultural Universities. Series Environmental Development

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2003

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tom 06

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nr 1

The objective of this research was to determine if copper concentration in the top plant tissue can be a reliable indicator of Cu toxicity. A four-year microplots experiment was carried out with 4 copper treatments: 0, 30, 60, and 90 kg ha 1. Spring wheat, red clover, and maize were grown on the microplots filled with sandy acid soil. In the first and second year, after application of the highest Cu rate, wheat and clover yields dramatically decreased. In spite of the fact that the yield decreases were very deep, the Cu tissue concentrations didn't reflect them; there never was an excessive Cu accumulation in top plants. This study and inspection of the published researches reveal that the Cu concentration in plant top tissue or in grain is not a sensitive or reliable indicator of Cu phytotoxicity, and it carries a possibility of misleading assessment.

8

Autofluorescence in in vitro cultures of Gentiana genus

58%

Mikula A., Ladyzynski M., Rybczynski J. J.

Biological Letters

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2005

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tom 42

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nr 2 Spec.Vol.

9

Teledetekcyjna ocena struktury roslinnosci obszaru Wisly Srodkowej na podstawie obrazow satelity Landsat 7 ETMplus

51%

Goluch P., Kaluza T., Lesny J., Szoszkiewicz K.

Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum

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2004

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tom 03

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nr 1-2

57-68

10

Struktura i kondycja zdrowotna populacji „Cisy Łagowsko-Sulęcińskie” w Nadleśnictwie Świebodzin

44%

Nawrocka-Grzeskowiak U., Nowak G., Nowakowska M.

Zarządzanie Ochroną Przyrody w Lasach

|

2017

|

tom 11

Ograniczanie wyników

The mode of ray initiation affects the rate of double storied pattern formation in cambium

Surface expansion of the shoot apical meristem in Arabidopsis thaliana

Influence of PIN1 gene mutation on the pattern of primary vasculature in Arabidopsis inflorescence shoot

Biology of edaphic microarthropods in CO2 - rich environments: an experimental design with particular regard for Collembola

Income situation of cereal producers on the example of wheat producers

The structure of floral elements of Anchusa officinalis L. creating attractants for insects

Copper concentration in the top plant tissue as an indicator of Cu toxicity

Autofluorescence in in vitro cultures of Gentiana genus

Teledetekcyjna ocena struktury roslinnosci obszaru Wisly Srodkowej na podstawie obrazow satelity Landsat 7 ETMplus

Struktura i kondycja zdrowotna populacji „Cisy Łagowsko-Sulęcińskie” w Nadleśnictwie Świebodzin