Flowering phenology of selected wind pollinated allergenic deciduous tree species

Systematic phenological observations have been carried out in the Dendrological Garden of August Cieszkowski Agricultural University, Park Sołacki, Lasek Golęciński, Przybyszewskiego Street, for two years (2003, 2004). The selected species of deciduous trees, as Betula pendula, Corylus avellana, Platanus x hispanica. There was interdependence between the course of flowering process and weather conditions. Long and frosty winter at the turn of 2002/2003 and subzero mean temperatures in the first quarter of 2003 delayed vegetation. Rapid coming of early spring in the year 2004 accelerate the development of generative organs. Each year spring ground frost during flowering did not inhibit this process. All the investigated tree species are anemophilous and produce large amounts of allergenic pollen grain. They cause allergic reactions throughout the whole period of pollen discharge. Male inflorescences in Corylus avellana, blooming very early, are one of the first plants causing allergic reactions. Betula pendula is the next to bloom, followed by Platanus x hispanica. Observations of phenological phases may provide useful information forecasting the beginning of the period of increased pollen concentration in air.

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Current state and resilience of three main tree species in southern Germany with regard to drier and hotter weather conditions over the past 50 years

10.5194/egusphere-egu21-11087 ◽

2021 ◽

Author(s):

Annette Debel ◽

Achim Bräuning

Keyword(s):

Tree Species ◽

Summer Precipitation ◽

Weather Conditions ◽

Deciduous Tree ◽

Response Analysis ◽

Climate Modelling ◽

Forest Site ◽

Southern Germany ◽

The Past ◽

Current State

Latest drought events and their already visible damage to trees highlight the crucial need to assess the current state and resilience of forest ecosystems in southern Germany. However, commonly applied dendroclimatic approaches rarely take into account, how weather patterns affecting trees are modified by topographic conditions. For this purpose, three main tree species were studied at three low mountain ranges and three corresponding basins in the topographically complex province of Bavaria (southeast Germany). A response analysis between climate proxies and tree-ring widths was used to investigate climate-growth relationships over the past 50 years of both coniferous and deciduous tree species at each forest site. Temporal stability of tree responses to climate was compared for two 25-year periods to detect possible modifications in climate-growth correlations. A pointer year analysis was also conducted to analyze tree response to climatic extreme events. The results showed that Scots pine (Pinus sylvestris) was the most vulnerable and least drought-resistant of the investigated tree species. Although Norway spruce (Picea abies) and European beech (Fagus sylvatica) benefited from an extended growing season at high elevation sites, they showed higher drought sensitivity over the past 25 years. Beech responses were rather inhomogeneous and even differed in the optimal precipitation period. However, lower correlation coefficients for summer precipitation at the driest site may indicate the ability of beech to adapt to less summer precipitation. Nevertheless, increasing drought frequency, as predicted, poses a serious threat to all studied tree species, including even the colder and more humid sites. Hence, to more accurately estimate risk potentials under future weather conditions, we will combine dendroclimatological results with climate modelling scenarios, particularly expected future frequencies of critical weather types on the local scale.

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Broad Leaf Trees as Reservoirs for Phytoseiid Mites (Acari: Phytoseiidae)

Plant Protection Science ◽

10.17221/3828-pps ◽

2011 ◽

Vol 39 (No. 2) ◽

pp. 65-69 ◽

Cited By ~ 2

Author(s):

J. Kabíček

Keyword(s):

Species Diversity ◽

Fagus Sylvatica ◽

Tree Species ◽

Quercus Robur ◽

Betula Pendula ◽

Deciduous Tree ◽

Acer Platanoides ◽

Phytoseiid Mites ◽

Salix Caprea ◽

Broad Leaf

The possibility that broad leaf trees can be reservoirs for phytoseiid mites was investigated by determining their occurrence and species diversity on common deciduous tree species. No phytoseiid mites were found on Betula pendula and Populus tremula. Altogether  280 specimens of phytoseiids belonging to six species (Neoseiulella ace-ri, N. tiliarum, Paraseiulus soleiger, Euseius finlandicus, Phytoseius severus, Typhlodromus rhenanus) were found on Acer platanoides, Fagus sylvatica, Quercus robur and Salix caprea. Ph. severus was the dominant phytoseiid species on S. caprea, while N. aceri was most abundant on A. platanoides. The greatest abundance and species diversity of phytoseiids were found on S. caprea that can thus constitute an excellent reservoir for some phytoseiid mites, particularly Phytoseius spp.  

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The Impact of Site Extremes on the Onset of Phenological Phases of Selected Tree Species

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis ◽

10.11118/actaun201462051117 ◽

2014 ◽

Vol 62 (5) ◽

pp. 1117-1124

Author(s):

Jana Škvareninová

Keyword(s):

Air Temperature ◽

Tree Species ◽

Soil Depth ◽

Average Length ◽

Growing Season ◽

Corylus Avellana ◽

Extreme Conditions ◽

Air Temperatures ◽

The Impact ◽

Phenological Phases

In the years 2007–2013 we performed phenological observations of common hazel (Corylus avellana L.), blackthorn (Prunus spinosa L.), and hawthorn (Crataegus oxyacantha L.) at two locations of central Slovakia situated at elevations of 300 m and 530 m a.s.l. The phenophase of first leaves of all tree species started in the second half of April on average, and was conditioned by the average daily air temperatures above 0 °C. The earliest onset was observed at both locations in 2007 due to the highest average air temperature during the observed period, which in March reached the value of 6.1 °C. Colouring of leaves started in the second and third decades of September. Both phenophases began earlier at the location situated at the higher elevation due to the effect of aspect, terrain, and soil depth. During the last 7 years, the average length of the growing season of tree species situated at an elevation of 300 m was from 136 to 152 days, in more extreme conditions at an elevation of 530 m the growing season was shorter by 12 days in the case of blackthorn and by 5 days in the case of hawthorn.

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Blue light advances bud burst in branches of three temperate deciduous tree species under short-day conditions

10.1101/259101 ◽

2018 ◽

Cited By ~ 1

Author(s):

Craig C. Brelsford ◽

T Matthew Robson

Keyword(s):

Blue Light ◽

Tree Species ◽

Quercus Robur ◽

Betula Pendula ◽

Alnus Glutinosa ◽

Deciduous Tree ◽

Bud Burst ◽

Spring Phenology ◽

Temperate Deciduous ◽

Successional Species

AbstractDuring spring, utilising multiple cues allow temperate tree species to coordinate their bud burst and leaf out, at the right moment to capitalise on favourable conditions for photosynthesis. Whilst the effect of blue light (400-500nm) has been shown to increase percentage bud burst of axillary shoots of Rosa sp, the effects of blue light on spring-time bud burst of temperate deciduous tree species has not previously been reported. We tested the hypotheses that blue light would advance spring bud burst in temperate tree species, and that late-successional species would respond more than early-successional species, who’s bud burst is primarily determined by temperature. The bud development of Alnus glutinosa, Betula pendula, and Quercus robur branches, cut from dormant trees, was monitored under two light treatments of equal photosynthetically active radiation (PAR, 400-700 nm) and temperature, either with or without blue light, under controlled environmental conditions. In the presence of blue light, the mean time required to reach 50% bud burst was reduced by 3.3 days in Betula pendula, 6 days in Alnus glutinosa, and 6.3 days in Quercus robur. This result highlights the potential of the blue region of the solar spectrum to be used as an extra cue that could help plants to regulate their spring phenology, alongside photoperiod and temperature. Understanding how plants combine photoreceptor-mediated cues with other environmental cues such as temperature to control phenology is essential if we are to accurately predict how tree species might respond to climate change.Key MessageAn LED spectrum containing blue light advanced bud burst in branches of Betula pendula, Alnus glutinosa and Quercus robur compared with a spectrum without blue light in a controlled environment.

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Changes of Starch Content in the Storage Tissues of Deciduous Trees During Winter and Spring

IAWA Journal ◽

10.1163/22941932-90000921 ◽

1985 ◽

Vol 6 (2) ◽

pp. 97-106 ◽

Cited By ~ 41

Author(s):

Sam. Essiamah ◽

Walter Eschrich

Keyword(s):

Fagus Sylvatica ◽

Tree Species ◽

Quercus Robur ◽

Betula Pendula ◽

Starch Content ◽

Alnus Glutinosa ◽

Deciduous Tree ◽

Deciduous Trees ◽

Acer Pseudoplatanus ◽

Bud Break

Starch transformation in relation to spring sap production has been investigated in six North European deciduous tree species from fall till the beginning of bud break in spring. The species examined were: Acer pseudoplatanus L., Betula pendula Roth, Alnus glutinosa Gärtn., Fagus sylvatica L., Quercus robur L., and Fraxinus excelsior L.

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Diversity of predominant endophytic bacteria in European deciduous and coniferous trees

Canadian Journal of Microbiology ◽

10.1139/w07-134 ◽

2008 ◽

Vol 54 (3) ◽

pp. 173-179 ◽

Cited By ~ 46

Author(s):

Hironari Izumi ◽

Ian C. Anderson ◽

Ken Killham ◽

Edward R.B. Moore

Keyword(s):

Tree Species ◽

Bacterial Communities ◽

Endophytic Bacteria ◽

Betula Pendula ◽

Acinetobacter Calcoaceticus ◽

Deciduous Tree ◽

Cultivable Bacteria ◽

Host Trees ◽

Leaf Tissues ◽

Respective Host

The diversity of endophytic bacteria residing in root, stem, and leaf tissues was examined in coniferous and deciduous tree species, Scots pine ( Pinus sylvestris L.), silver birch ( Betula pendula Roth), and rowan ( Sorbus aucuparia L.). Using cultivation-dependent and -independent analyses, the bacterial communities were observed to be significantly different in the belowground (roots and rhizosphere) and aboveground (leaves and stems) samples of the respective host trees. No significant differences, with respect to the different tree species, were observed in the associated communities. Predominant cultivable endophytes isolated included bacteria closely related to Bacillus subtilis , Bacillus licheniformis , Paenibacillus spp., and Acinetobacter calcoaceticus . Comparisons of the most abundant cultivable bacteria in the rhizosphere and root samples suggested that root endophytic bacteria may be in residence through processes of selection or active colonization rather than by passive diffusion from the rhizosphere.

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