Wyniki wyszukiwania

1

The use of hydrogel in afforestation of postindustrial areas

100%

Ptach W., Boczon A., Wrobel M.

Journal of Water and Land Development

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2009

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nr 13b

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of provenance on the survival of Picea abies trees on the IPTNS-IUFRO 1964-68 site in Krynica (Poland)

80%

Masternak K., Sabor J., Majerczyk K.

Dendrobiology

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2009

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tom 61 Supplement

In connection with the decline of spruce stands on the Krynica plots of IPTNS-IUFRO 1964/68, observed in the last decade and attributed to the so-called spiral disease, an attempt was made to determine whether the current health condition of trees is influenced by genotype (provenance). As shown by preliminary observations, the spruces differed in the degree of survival depending on provenance. The inventories of died or broken trees to be removed during the sanitary cutting, made in the years 2000, 2003, 2004 and 2008, yielded also information about the number of spruces that remained in the blocks of the experiment for each provenance and provenance region by Krutzsch (1968). Analysis of variance showed that genotype (provenance) has a statistically significant effect on the survival of trees. In the years 1999-2008, spruces from region 21 (Bohemian Forest) displayed the poorest survival rate in the conditions of the Beskid Sądecki Mts., while those from region 80 (Eastern Siberia) survived best.

3

Growth, survival, density, biomass partitioning and morphological adaptations of natural regeneration in Fagus sylvatica. A review

80%

Jarcuska B.

Dendrobiology

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2009

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tom 61

3-11

Beech is an important woody species in terms of ecology, and it also has a considerable commercial value. This fact is also reflected in a high number of scientific papers handling the issue of natural regeneration of this woody plant. The aim of this review is to analyse influence of resources availability and impact of other factors (competition) on height and diameter growth, survival, density, biomass partitioning and morphological adjustment in naturally regenerated beech seedlings and saplings. It pays a particular attention to light – the factor that influences, directly or indirectly, other environmental factors, and consequently, as the key influence on the performance of beech natural regeneration. This contribution includes information about e.g. shade tolerance and mortality-light relationships, ability to increase growth under improved light conditions, dependence of trees growth on their individual size and age etc. In spite of a large number of papers handling the issue of research on beech natural regeneration, growth responses in individual plants are difficult to predict, because the factors involved are numerous. Thus, the process of natural regeneration is in fact interactive, and even retroactive: any change in one of the involved factors induces adjustments of the others.

4

Picea abies in Northrhine-Westphalia

80%

Schmitt H. P., Heyder J.

Dendrobiology

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2009

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tom 61 Supplement

The Sauerland region of southern Westphalia has the most economic stands of Norway spruce in the state of Northrhine-Westphalia (Germany). As shown by historical research and genetic analysis, the seeds for these stands were imported from Thuringia around the year 1880. Therefore, the two states are collaborating closely to secure the genetic variety of the spruce and develop new sources of seed supply. The survival of the Hochsauerland Norway spruce is now under threat: these stands have already been harvested or are due for harvesting shortly, in addition, many of the older stands were destroyed by the gale "Kyrill" in 2007, and only a few stands have remained. Since its foundation, the Forest Gene Bank of Northrhine-Westphalia has taken the following measures to preserve the gene pool of the Hochsauerland spruce and conserve it in the long term: storage of seed from 100 representative trees in all the most valuable stands of spruce (since 1985); establishment of seed orchards; and establishment of replacement stands. Thanks to those measures, the genetic information of the Norway spruce stands of Thuringian origin has been secured, and substantial stocks of seed are available for reforestation.

5

Temporal-spatial interaction between ROS and ABA controls rapid systemic acclimation in plants

80%

Mittler R.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 2

6

Biomass fraction of graminoids and forbs in N-limited Alpine grasslands: N:P stoichiometry

80%

Zhang R., Gou X., Bai Y., Zhao J., Chen L., Song X., Wang G.

Polish Journal of Ecology

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2011

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tom 59

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nr 1

It is known that the dominance of graminoid species is promoted by N addition; however, there has been relatively little effort to examine the pattern induced by natural N fertility. Since nutrie nt use e fficiency (NUE) is an important trait determining plant competitive ability, we expected that the species guild with higher NUE (lower nutrient content) may be more competitive on infertile soils. We explo red t he relationships between relative forbs biomass share , soil N and productivity by the linear regressi on analysis on a natural alpine meadow in northeast of Qinghai- Tibetan Plateau (3600 m a.s.l.). To test the variety of leaf N:P stoichiometry, paired t test and general linear model multivariate (GLM) analysis were also used. We f ound that the leaf N:P ratios of the whole community were below 13 in studied sites, which may be consistent with the N limitation on the veget ation. Graminoids re tained lower concentrations of leaf N and P than forbs in community on the Nlimited grassland. Consistent with our prediction, we found that the biomass fraction of graminoids declined with soil N content and aboveground production on the grassland. Different from the pattern along fertility gradients induced by N fertilization, our results showed that gr aminoids with lower internal nutrient content w ere able to resist low levels of nutrient availability on the natural alpine grassland when compared to forbs.

7

Increasing the frost resistance of ‘Golden Delicious’, ‘Gala’ and ‘Sampion’ apple cultivars

71%

Lysiak G. P., Kurlus R., Michalska A.

Folia Horticulturae

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2016

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tom 28

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nr 2

8

Przechowywanie zasobów genetycznych czosnku pospolitego (Allium sativum L.) w ciekłym azocie

71%

Olas M., Kotlinska T.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2010

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tom 555

Do długoterminowego przechowywania zasobów genowych czosnku zastosowano metodę witryfikacji. Krioprezerwacji poddano obiekty czosnku tworzące i nietworzące pędów kwiatostanowych. Materiał badawczy stanowiły stożki wzrostu izolowane z cebulek powietrznych oraz roślin otrzymanych w kulturach in vitro. Stożki wzrostu wielkości 3-5 mm i średnicy ok. 2 mm traktowane były roztworem PVS3 (50% sacharoza, 50% glicerol), po czym bezpośrednio zamrażano w ciekłym azocie. Przeżywalność eksplantatów określano po 2 tygodniach od rozmrożenia, natomiast ostateczną regenerację po 10 tygodniach. Regeneracja eksplantatów uzyskanych z cebulek powietrznych wahała się od 24% do 83%, natomiast w przypadku stożków wzrostu izolowanych z roślin otrzymanych w kulturach in vitro od 0,23% do 33,3% i była uzależniona od genotypu.

9

Krzyzowanie odmian i rodow pszenicy heksaploidalnej Triticum aestivum L. z zytem diploidalnym Secale cereale L. i uzyskanie form pierwotnych pszenzyta oktoploidalnego

61%

Kluska T., Pilch J.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

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1995

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tom 194

53-61

Ograniczanie wyników

The use of hydrogel in afforestation of postindustrial areas

Effect of provenance on the survival of Picea abies trees on the IPTNS-IUFRO 1964-68 site in Krynica (Poland)

Growth, survival, density, biomass partitioning and morphological adaptations of natural regeneration in Fagus sylvatica. A review

Picea abies in Northrhine-Westphalia

Temporal-spatial interaction between ROS and ABA controls rapid systemic acclimation in plants

Biomass fraction of graminoids and forbs in N-limited Alpine grasslands: N:P stoichiometry

Increasing the frost resistance of ‘Golden Delicious’, ‘Gala’ and ‘Sampion’ apple cultivars

Przechowywanie zasobów genetycznych czosnku pospolitego (Allium sativum L.) w ciekłym azocie

Krzyzowanie odmian i rodow pszenicy heksaploidalnej Triticum aestivum L. z zytem diploidalnym Secale cereale L. i uzyskanie form pierwotnych pszenzyta oktoploidalnego