Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Bamboo as an innovative material for many branches of world industry

100%

Borowski P.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

|

2019

|

tom 107

2

Tropical mosses in the greenhouses of the Botanical Garden of the Polish Academy of Sciences in Warszawa-Powsin

100%

Rusinska A., Ratynska H., Galera H.

Fragmenta Floristica et Geobotanica

|

1996

|

tom 41

|

nr 2

3

Differences in chemical composition of needle and leaf litter from exotic and native tree species stands

80%

Skorupski M., Jagodzinski A. M., Zytkowiak R., Karolewski P.

Dendrobiology

|

2012

|

tom 68

The potential differentiations in litter chemistry among native and non-native trees are poorly understood. We compared the chemical composition of leaf litterfall of 11 exotic tree species, e.g. coniferous: Abies cephalonica, A. grandis, A. procera, Chamaecyparis pisifera, Pinus peuce, Pseudotsuga menziesii, Thuja plicata, and deciduous: Acer rubrum, A. saccharum, Betula alleghaniensis and Quercus rubra, with that of a native European conifer, Pinus sylvestris (as reference to coniferous species) anda mixture of native European Quercus robur, Carpinus betulus, Tilia cordata, T. platyphyllos and Corylus avellana leaves (as a reference mixture of deciduous species). We found significant differences among the species studied in nitrogen and carbon content in needles/leaves, C/N ratio, as well as total soluble phenolic compounds (TPh) and total nonstructural carbohydrates (TNC) content, including soluble carbohydrates and starch. However, we found no clear differentiation of exotic from native tree species in the analyzed elements and metabolites. Among the exotic coniferous tree species, P. menziesii stood out among the species studied – fallen needles of this species were characterized by relatively high TPh and TNC content. The relationships between TPh and TNC content in leaf and needle litter among tree species were similar among two consecutive years. For deciduous tree species, the tendency of higher TPh content and C/N ratio in leaves falling earlier (September; leaves of sun-type) than later (November; leaves of shade-type) was more distinct than in coniferous tree species. Generally, we cannot see any special differences in the levels or mutual quantitative relationships of the chemical compounds studied in fallen needles/leaves of exotic tree species in comparison with native tree species.

4

Effects of saline-alkaline stress on early growth strategy and colonization success of Flaveria bidentis ( L.) Kuntze (Asteraceae ) - a new exotic plant in Northern China

80%

Chai M., Shi F., He K. S., Li R., Cao D., He Z.

Polish Journal of Ecology

|

2012

|

tom 60

|

nr 3

Flaveria bidentis, an annual grass native to South America, has invaded into many countries all over the world, including South Africa and Egypt in Africa, Britain and France in Europe, Japan in Asia, and Australia. In China, this plant species has been widely distributed in Hebei province since 2001 of its first discovery in Tianjin. In salinized soil of northern China, F. bidentis has formed mono dominant communities owing to its opportunistic characteristics. In this study, we investigated germination rate, germination energy, germination index and vigor index in response to different saline-alkaline stresses. Lengths of seedling, hypocotyl, and radicle were also examined. During germination process, germination rate, germination energy, germination index, and vigor index decreased due to higher salinity and alkalinity (pH). Hypocotyl elongation was stimulated at low salinity and alkalinity, but decreased with increasing salinity and alkalinity. The lengths of radicle and seedling were inhibited sharply with increasing salinity and alkalinity. These results suggest that a reciprocal enhancement between salt stress and alkaline stress was a characteristic feature during seed germination of F. bidentis. Ungerminated seeds resumed to germinate after transferred to distilled water, indicating that seeds remained viable during their exposure to saline-alkaline stresses. Stepwise regression analysis indicated that the effects of salinity, alkalinity (pH), and buffer capacity on seed germination and seedling growth were significantly different in magnitude. Salinity and alkalinity (pH) were the dominant factors in seed germination and seedling growth of F. bidentis respectively. burther, the results of this study suggest that F. bidentis has developed excellent adaptative strategy in its early stage of life cycle which partially explains its current invasion success in northern China.

5

Plant illustrations in the Libri picturati [A.18-30] [Jagiellonian Library, Cracow, Poland] and new currents in Renaissance botany

80%

Zemanek A., De Koning J.

Polish Botanical Studies. Guidebook Series

|

1998

|

tom 20

6

Kwiaty w domu

71%

Jaroszenko-Skrunda A.

Agrochemia

|

2001

|

nr 01

29-30

7

Rozmieszczenie nawłoci (Solidago spp.) na obszarze Dolnego Śląska oraz ich wpływ na różnorodność biologiczną zasiedlanych fitocenoz

61%

Szymura M., Szymura T. H.

Acta Botanica Silesiaca

|

2011

|

tom 06

In Lower Silesia, three goldenrod species introduced from North America are found: Solidago gigantea Aiton (late goldenrod), S. canadensis L. (Canadian goldenrod) and S. graminifolia (L.) Elliott. (grass-leaved goldenrod). A native species is also found: Solidago virgaurea L. (common goldenrod). Distribution of these species was surveyed using sampling plots in a 10x10 km grid. The impact of increasing cover of goldenrods on biodiversity of patches of invaded vegetation was assessed. Biodiversity was described by the number of co-occurring vascular plant species inside 100 m2 plots placed in vegetation patches with goldenrods. The Shannon-Wiener diversity index was also calculated. The habitat preferences of particular Solidago species were examined. The most numerous goldenrod species in Lower Silesia were Solidago canadensis and S. gigantea, which were found in a similar number of plots. Distribution of thes two species were clumped in spatial scale of the whole study area. Solidago canadensis and S. gigantea do not differ with respect to their habitat preferences. The number of plant species as well as the Shannon-Wiener diversity index significantly decreased with increasing cover of S. canadensis and S. gigantea.