scholarly journals Genetic diversity of geographically isolated Iranian populations of Betula pendula Roth: implications for conservation

Silva Fennica ◽  
2016 ◽  
Vol 50 (3) ◽  
Author(s):  
Hamed Yousefzadeh ◽  
Abasalt Hosseinzadeh Colagar ◽  
Fatemeh Fallah
Keyword(s):  
Genetic Diversity ◽  
Betula Pendula ◽  
Betula Pendula Roth ◽  
Iranian Populations ◽  
Geographically Isolated

scholarly journals Novel Post-Glacial Haplotype Evolution in Birch – A Case for Conserving Local Adaptation

2021 ◽  
Author(s):  
Samuel Belton ◽  
Philippe Cubry ◽  
Erica Fox ◽  
Colin T. Kelleher
Keyword(s):  
Genetic Diversity ◽  
Genetic Structure ◽  
Local Adaptation ◽  
Ssr Markers ◽  
Betula Pendula ◽  
Putative Hybrid ◽  
Betula Pendula Roth ◽  
Population Distributions ◽  
Population Structuring ◽  
Betula Pubescens Ehrh

Despite constituting the western-most edge of the population distributions for several native European flora, Ireland has largely been left out of key Europe-wide phylogeographic studies. This is true for birch (Betula pubescens Ehrh. and Betula pendula Roth.), for which the genetic diversity has yet to be mapped for Ireland. Here, we used eight cpDNA (two RFLP and six SSR) markers to map the genetic diversity of B. pubescens, B. pendula and putative hybrid individuals sampled from 19 populations spread cross most of the island of Ireland. Within Ireland, 11 distinct haplotypes were detected, the most common of which (H1) was also detected in England, Scotland, France and Norway. A moderate level of population structuring (GST = 0.282) was found across Ireland and the genetic diversity of its northern populations was twice that of its southern populations. This indicates that, unlike other native Irish trees, such as oak and alder, post-glacial recolonisation by birch did not begin in the south (i.e., from Iberia). Rather, and in agreement with palynological data, birch most likely migrated in from eastern populations in Britain. Finally, we highlight Irish populations with comparatively unique genetic structure which may be included as part of European genetic conservation networks.

Phytoindication of the environmental conditions by the degree of leaves damage of Betula pendula Roth

2019 ◽  
Vol 24 (2) ◽  
pp. 66-74
Author(s):  
Kristina Krupey ◽  
◽  
Katerina Obruch ◽  
A. Mihailichenko ◽  
◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Betula Pendula ◽  
Betula Pendula Roth

Оценка содержания металлов в надземных органах березы повислой в условиях полиметаллического загрязнения окружающей среды

2010 ◽  
pp. 21-25
Author(s):  
Р. Х. Гиниятуллин ◽  
Алексей Юрьевич Кулагин
Keyword(s):  
Betula Pendula ◽  
Betula Pendula Roth

Представлены материалы по оценке относительного жизненного состояния и аккумуляции металлов различными надземными органами березы повислой (Betula pendula Roth.) в условиях технического загрязнения Стерлитамакского промышленного центра (СПЦ). Показано, что насаждения березы в СПЦ способны депонировать техногенные металлы в этих условиях.

scholarly journals Towards Silviculture Guidelines to Produce Large-Sized Silver Birch (Betula pendula Roth) Logs in Western Europe

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 599
Author(s):  
Héloïse Dubois ◽  
Hugues Claessens ◽  
Gauthier Ligot
Keyword(s):  
Betula Pendula ◽  
Western Europe ◽  
Forest Health ◽  
Silver Birch ◽  
Growth Potential ◽  
Betula Pendula Roth ◽  
Crown Diameter ◽  
Birch Trees ◽  
Timber Tree ◽  
Northeastern France

Forest health problems arising from climate change, pests and pathogens are a threat to the main timber tree species. As a result, silver birch (Betula pendula Roth) has become a precious asset for meeting oncoming forestry challenges in western Europe. However, silviculture guidelines to produce high-value birch logs in this region are lacking. Producing large-sized birch trunks requires crown release, i.e., removing crown competitors around selected target trees. These interventions are currently seldom carried out or else too late when the growth potential of the trees has already diminished. This study set out to ascertain the diameter at breast height (dbh) that could be reached by crown-released birch, determine dbh-associated crown diameters, and further characterize the gain obtained from early crown release on birch dbh growth. We measured 704 birch trees that had undergone crown release in 38 naturally regenerated pure birch stands in southern Belgium and in northeastern France. We then evaluated the variation in stem and crown diameter, and analyzed increments in response to the earliness of the interventions in three subsamples, also compared with control target birch. We found that trees with a dbh of 50 cm could be grown within 60 years. Based on crown diameter, to produce 40, 50 and 60 cm dbh trunk, the distance required between target birch trees at the end of the rotation was around 8, 10 and 12 m. With no intervention and in ordinary dense birch regenerations, the dbh increment was found to decline once the stand reached age 4–7 years. Starting crown release in stands aged 4–5 years can double the dbh increment of target trees and provide a continual gain that may last up to 20 years. When birch crowns are released after 9–12 years, it may already be too late for them to recover their best growth rate. Our contribution should help complete emerging guidelines in support of birch silviculture development.

The seasonal activity and the effect of mechanical bending and wounding on the PtCOMT promoter in Betula pendula Roth

2007 ◽  
Vol 26 (8) ◽  
pp. 1205-1214 ◽  
Author(s):  
Heidi Tiimonen ◽  
Hely Häggman ◽  
Chung-Jui Tsai ◽  
Vincent Chiang ◽  
Tuija Aronen
Keyword(s):  
Betula Pendula ◽  
Seasonal Activity ◽  
Betula Pendula Roth ◽  
Mechanical Bending

scholarly journals Evaluation of Antioxidative Mechanisms In Vitro and Triterpenes Composition of Extracts from Silver Birch (Betula pendula Roth) and Black Birch (Betula obscura Kotula) Barks by FT-IR and HPLC-PDA

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4633
Author(s):  
Aleksandra Ostapiuk ◽  
Łukasz Kurach ◽  
Maciej Strzemski ◽  
Jacek Kurzepa ◽  
Anna Hordyjewska
Keyword(s):  
Chemical Composition ◽  
Betula Pendula ◽  
Antioxidant Properties ◽  
Silver Birch ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Outer Bark ◽  
Betula Pendula Roth ◽  
Production Of Hydrogen ◽  
Active Substances

Silver birch, Betula pendula Roth, is one of the most common trees in Europe. Due to its content of many biologically active substances, it has long been used in medicine and cosmetics, unlike the rare black birch, Betula obscura Kotula. The aim of the study was therefore to compare the antioxidant properties of extracts from the inner and outer bark layers of both birch trees towards the L929 line treated with acetaldehyde. Based on the lactate dehydrogenase test and the MTT test, 10 and 25% concentrations of extracts were selected for the antioxidant evaluation. All extracts at tested concentrations reduced the production of hydrogen peroxide, superoxide anion radical, and 25% extract decreased malonic aldehyde formation in acetaldehyde-treated cells. The chemical composition of bark extracts was accessed by IR and HPLC-PDA methods and surprisingly, revealed a high content of betulin and lupeol in the inner bark extract of B. obscura. Furthermore, IR analysis revealed differences in the chemical composition of the outer bark between black and silver birch extracts, indicating that black birch may be a valuable source of numerous biologically active substances. Further experiments are required to evaluate their potential against neuroinflammation, cancer, viral infections, as well as their usefulness in cosmetology.

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