نتایج جستجو برای: betula pendula

تعداد نتایج: 3162  

2015
Katarzyna Hrynkiewicz Sonia Szymańska Agnieszka Piernik Dominika Thiem

Saline stress is one of the most important abiotic factors limiting the growth and development of plants and associated microorganisms. While the impact of salinity on associations of arbuscular fungi is relatively well understood, knowledge of the ectomycorrhizal (EM) fungi of trees growing on saline land is limited. The main objective of this study was to determine the density and diversity o...

2012
Codruta Şoica Cristina Dehelean Corina Danciu Hai Ming Wang Gerhard Wenz Rita Ambrus Florina Bojin Mariana Anghel

Given the present high incidence of melanoma and skin cancer, interest in potential drugs of plant origin has increased significantly. Pentacyclic lupane-type triterpenes are widely distributed in plants, offering numerous pharmacological benefits. Betulin is an important compound in the bark of Betula pendula Roth and has important therapeutic properties, including antitumor activities. Its bi...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1996
F Wagner R Below P D Klerk D L Dilcher H Joosten W M Kürschner H Visscher

Carbon dioxide (CO2) has been increasing in atmospheric concentration since the Industrial Revolution. A decreasing number of stomata on leaves of land plants still provides the only morphological evidence that this man-made increase has already affected the biosphere. The current rate of CO2 responsiveness in individual long-lived species cannot be accurately determined from field studies or b...

2015
Narayanan Subramanian Johan Bergh Ulf Johansson Ola Sallnäs Eric J. Jokela

Even though the growth rates of most tree species in Sweden is expected to increase in the near future as a result of climate change, increased risks of damage by storms and various pests and pathogens, notably root rot and bark beetles, may also occur. Thus, forest management practices such as changes to thinning regimes, reductions in rotation lengths, and switching to other species (native o...

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