Статті в журналах: "Chêne sessile (Quercus petraea)"

1

GUIBERT (M.) and GENERE (Benoît). "Evaluation en jeunes plantations de lots mélangés de chênes sessile (Quercus petraea) et pédonculé (Quercus robur)." Revue Forestière Française, no. 4 (2000): 303. http://dx.doi.org/10.4267/2042/5364.

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Dupouey, J. L., and H. Le Bouler. "Discrimination morphologique des glands de chênes sessile (Quercus petraea (Matt.) Liebl.) et pédonculé (Quercus robur L.)." Annales des Sciences Forestières 46, no. 2 (1989): 187–94. http://dx.doi.org/10.1051/forest:19890207.

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Heuret, P., D. Barthélémy, E. Nicolini, and C. Atger. "Analyse des composantes de la croissance en hauteur et de la formation du tronc chez le chêne sessile, Quercus petraea (Matt.) Liebl. (Fagaceae) en sylviculture dynamique." Canadian Journal of Botany 78, no. 3 (April 20, 2000): 361–73. http://dx.doi.org/10.1139/b00-012.

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Simultaneous observation of morphological and anatomical markers allowed us to reconstitute the growth pattern of the main axis in two populations of sessile oak aged 15 and 29 years, respectively. The comparison of the morphological features of annual shoots and growth units according to either their ontogenic age or their year of formation allowed us to separate endogenous trends in the development of the tree and variations resulting from the effect of annual growth conditions. Three stages of tree development were identified. The first stage is characterized by the regular production of monocyclic annual shoots with a stable mean length and is typical of young trees growing under a dense canopy. In the second stage of development, the intrinsic growth pattern expresses itself dominantly; this stage is marked by a systematic increase in the length and polycyclism rate of successive annual shoots, and by a strong differentiation between the successive growth units of polycyclic annual shoots. In the third stage, environmental factors have a stronger influence on the ontogenic growth pattern. In this stage, the length of the different growth units and annual shoots is stationary but shows important annual variations, while the differentiation between the successive growth units of bicyclic annual shoots is not systematic.Key words: Quercus petraea, sessile oak, morphology, primary growth, ontogeny.

4

Nicolini, Eric, Daniel Barthélémy, and Patrick Heuret. "Influence de la densité du couvert forestier sur le développement architectural de jeunes chênes sessiles, Quercus petraea (Matt.) Liebl. (Fagaceae), en régénération forestière." Canadian Journal of Botany 78, no. 12 (December 1, 2000): 1531–44. http://dx.doi.org/10.1139/b00-125.

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The growth and branching patterns of the main axis of 6-year-old sessile oak, growing in a natural regeneration in the north of France, were analysed each year retrospectively according to three increasing canopy density conditions: large gap, small gap, and dense canopy. Increasing gap size is associated with an increase in the total height, basal diameter, branching probability, and global polycyclism rate of the trees. At the growth unit or annual shoot level, from dense canopy to large gaps these botanical entities also show an increase in their total length, number of nodes, polycyclism, and branching rate as well as mean number of branches and mean internode length. A discussion of our results revealed some endogenous features of growth and branching patterns in young sessile oak trees. It is also shown that increasing canopy density generally tends to reduce the expression of the endogenous architectural sequence of differentiation of young sessile oak trees. Young trees growing below dense canopy thus seem to be "delayed" in their sequence of differentiation and appear to be in a "waiting" status, whereas young trees growing in large gaps exhibit an architecture very similar to trees growing in nurseries under nonlimiting growth conditions.Key words: architecture, Quercus petraea, growth, morphology, canopy density.

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Guilley, E., M. Loubère, and G. Nepveu. "Identification en forêt de chênes sessiles (Quercus petraea) présentant un angle du fil du bois intrinsèquement faible." Canadian Journal of Forest Research 29, no. 12 (December 15, 1999): 1958–65. http://dx.doi.org/10.1139/x99-141.

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Grain angle on bark (angle between the general direction of bark fissures and the axis of the trunk) was assessed at the four cardinal points at breast height (1.3 m) on 82 standing sessile oaks (Quercus petraea Liebl.). After felling, wood spiral grain was measured at breast height from cambium to pith along two diametrically opposite radii. A mixed-effect model that links the tangent of grain angle to radial position (age and distance from the pith) allows to estimate two individual parameters of grain angle. In the field, nondestructive measurements of grain angle (subcortical spiral grain or spiral grain on bark) on an individual tree combined with information on the tree stand allow to estimate one of the two parameters that describes the change in grain angle for a given radial increment. This parameter is independent of mean ring width, tree age and circumference, and site characteristics; it should allow a more accurate identification and selection of standing trees with low wood spiral grain.

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Duplat, P., and M. Tran-Ha. "Modélisation de la croissance en hauteur dominante du chêne sessile (Quercus petraea Liebl) en France Variabilité inter-régionale et effet de la période récente (1959-1993)." Annales des Sciences Forestières 54, no. 7 (1997): 611–34. http://dx.doi.org/10.1051/forest:19970703.

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7

Heuret, P., D. Barthélémy, E. Nicolini, and C. Atger. "Analyse des composantes de la croissance en hauteur et de la formation du tronc chez le chêne sessile, Quercus petraea (Matt.) Liebl. (Fagaceae) en sylviculture dynamique." Canadian Journal of Botany 78, no. 3 (2000): 361–73. http://dx.doi.org/10.1139/cjb-78-3-361.

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LEBOURGEOIS (François). "Les Chênes sessile et pédonculé (Quercus petraea Liebl. et Quercus robur L.) dans le réseau Renecofor : rythme de croissance radiale, anatomie du bois, de l'aubier et de l'écorce." Revue Forestière Française, no. 4 (1999): 522. http://dx.doi.org/10.4267/2042/5460.

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Hariri, E. B., B. Jeune, S. Baudino, K. Urech, and G. Sallé. "Élaboration d'un coefficient de résistance au gui chez le chêne." Canadian Journal of Botany 70, no. 6 (June 1, 1992): 1239–46. http://dx.doi.org/10.1139/b92-157.

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The reactions of oak to mistletoe (Viscum album L.) were studied using about 100 sensitive and susceptible oak twigs belonging to three species of oak: Quercus robur, Quercus rubra, and Quercus petraea. The main parameters likely to be involved in the resistance mechanism to mistletoe were measured on longitudinal radial sections. After conducting several principal component analyses and discriminant analyses, four variables were shown to have high discriminant values: thickness of the cortex, density of polyphenol-containing cells, thickness of the first layers of fibers, and thickness of collenchyma. Statistical analyses were performed using a large number of samples to define a discriminating function linking the four variables and to propose a resistance coefficient. The significance of such a coefficient for forest managers and pharmacologists is discussed in relation to their own needs. Key words: Viscum album, Quercus, resistance coefficient, mistletoe.

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Öztürk, Cansu, and Servet Caliskan. "Utjecaj osjetljivosti na isušivanje i kritičnog sadržaja vlage na žirove vrste Quercus cerris, Quercus petraea i Quercus robur." Šumarski list 148, no. 3-4 (March 26, 2024): 153–61. http://dx.doi.org/10.31298/sl.148.3-4.4.

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In this study, critical moisture contents and desiccation sensitivity of Quercus cerris (Turkey oak), Quercus petraea (Sessile oak), Quercus robur (Pedunculate oak) seeds were determined to see how desiccation affects acorn moisture content and germination behaviour. The moisture content of the harvested acorns was found to be 41% for Q. cerris, 46% for Q. petraea and 45% for Q. robur. The acorns were separated into sublots, sprayed with distilled water to reach their maximum moisture content and then left to dry for 18 days. There were statistically significant differences in germination as a function of desiccation time and decreasing moisture content. Initial germination was delayed. The highest moisture contents were 48% for Q. cerris, 51% for Q. petraea and 49% for Q. robur acorns. The highest water uptake was 17% in Q. cerris, 11% in Q. petraea and the lowest was 9% in Q. robur. The moisture content with a germination percentage below 50% was considered as the critical moisture content. In a period of 12-15 days after the beginning of the drying process, the acorns reached the critical moisture content. The germination percentage decreased from 83% to 43% for Q. cerris, from 100% to 44% for Q. petraea and from 97% to 43% for Q. robur as the moisture content decreased from the maximum to the critical moisture content. For Q. cerris, Q. petraea and Q. robur, the critical moisture contents at which acorns begin to lose viability were between 28-31%, 31-36% and 32-37%, respectively. The results of the present study provide guidance for nursery practices carried out on oak species, from acorn harvesting to seeding and post-seeding care.

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Sijacic-Nikolic, Mirjana, Jelena Milovanovic, M. Bobinac, Dusanka Savic-Pavicevic, G. Brajuskovic, and M. Diklic. "Variability of the chloroplast DNA of sessile oak (Quercus petraea agg. Ehrendorfer, 1967) in Serbia." Archives of Biological Sciences 61, no. 3 (2009): 459–65. http://dx.doi.org/10.2298/abs0903459s.

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Genetic variability of sessile oak (Quercus petraea agg. Ehrendorfer, 1967) in Serbia is estimated applying cpDNA universal primer pairs that were characterized by a high informative level for chloroplast genome variability assessment in previous investigations. Five different haplotypes were detected in the analyzed sample material from populations in Serbia.

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Derory, Jérémy, Patrick Léger, Virginie Garcia, Jacques Schaeffer, Marie-Theres Hauser, Franck Salin, Christian Luschnig, Christophe Plomion, Josef Glössl, and Antoine Kremer. "Transcriptome analysis of bud burst in sessile oak (Quercus petraea)." New Phytologist 170, no. 4 (June 2006): 723–38. http://dx.doi.org/10.1111/j.1469-8137.2006.01721.x.

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Dostálek, Jiří, Tomáš Frantík, and Miroslava Lukášová. "Genetic differences within natural and planted stands of Quercus petraea." Open Life Sciences 6, no. 4 (August 1, 2011): 597–605. http://dx.doi.org/10.2478/s11535-011-0034-8.

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AbstractFive sessile oak [Quercus petraea (Matt.) Liebl.] stands from the Czech Republic were studied to learn about the impact of different types of forest management regimes on the genetic differences among tree populations and on population structures. One population had not been markedly affected by human activity, two populations represented unplanted stands that were extensively managed for a long period of time using the coppice system, and two populations were planted stands. Approximately 100 trees from each stand were mapped and subsequently genotyped using 10 nuclear microsatellite loci. We determined the spatial genetic structure of each population and the genetic differentiation among the populations. We found that: (i) the populations were genetically differentiated, but the differences between the unplanted and planted stands were not markedly significant; (ii) the genetic differentiation among the populations depended on the geographical distribution of the populations; (iii) within unplanted stands, a strong spatial genetic structure was seen; and (iv) within planted stands, no spatial genetic structure was observed. Our findings implies that the analysis of spatial genetic structure of the sessile oak forest stand can help reveal and determine its origin.

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Drexhage, Michael, Marc Chauvière, Francis Colin, and Christian NN Nielsen. "Development of structural root architecture and allometry of Quercus petraea." Canadian Journal of Forest Research 29, no. 5 (May 1, 1999): 600–608. http://dx.doi.org/10.1139/x99-027.

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Root growth direction, radial distribution of roots, and biomass partitioning within the root system were examined on fifty-five 20 and 28-year-old sessile oak (Quercus petraea (Matt.) Liebl.) trees. The root systems were spatially subdivided into three concentric cylinders. Diameters and compass direction of roots were recorded at each point where they crossed one of the cylinders. Analysis of the distribution of root cross-sectional area (Ar) at 30 cm radius from the stem showed clustering in a preferred direction only for 10 small trees (diameter at breast height (DBH) < 9 cm). A classification of four incline growth types was used to describe differences in root architecture associated with the different age stands. Approximately 75% of all roots kept their orientation throughout the root-soil plate on both plots. Equations were developed to describe allometric relationships between basal area, DBH, sum of Ar, and root biomass. With increasing stem diameter, the root biomass was allocated predominantly to and evenly distributed within the surface root system, effectively increasing tree stability. Results from this study support the idea that root system architecture is inherently determined and that DBH or proximal root diameter measurements are sufficient to predict root biomass of young sessile oak when soil properties are nonrestrictive.

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Jurkšienė, Girmantė, Oleg Yu Baranov, Dmitry I. Kagan, Olja A. Kovalevič-Razumova, and Virgilijus Baliuckas. "Genetic diversity and differentiation of pedunculate (Quercus robur) and sessile (Q. petraea) oaks." Journal of Forestry Research 31, no. 6 (October 3, 2019): 2445–52. http://dx.doi.org/10.1007/s11676-019-01043-3.

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Abstract This study was conducted to determine the parent–offspring genetic structure of the pedunculate oak (Quercus robur L.), sessile oak (Q. petraea [Matt.] Liebl.) and their hybrids. Forty half-sib Quercus families and their maternal trees originating from one tree stand in southern Lithuania were analyzed using SSR and RAPD markers. Based on a preliminary study of leaf morphological traits, the individuals separated into six groups. The studied half-sib oak families were also compared for allelic diversity, including group variations; genotypic structure; genetic diversity; and the degree of genetic subdivision and differentiation. The level of genetic variation and subdivision was lower in the hybrid families than in the families of the parental species. Genotypic analysis of the half-sibling offspring showed the asymmetric nature of interspecific hybridization processes of pedunculate and sessile oaks in mixed stands.

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IONIȚĂ, Lucia, Ionel MIRANCEA, Ecaterina N. A. APOSTOL, Marius BUDEANU, and Emanuel BESLIU. "Preservation of Quercus Robur and Quercus Petraea Genetic Resources through In Vitro Culture." Series II: Forestry • Wood Industry • Agricultural Food Engineering 14(63), no. 2 (December 22, 2021): 15–28. http://dx.doi.org/10.31926/but.fwiafe.2021.14.63.2.2.

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In this paper, the effect of various factors (clone, initial explant, sterilization method, and culture medium) on the in vitro multiplication of pedunculate and sessile oak species was tested. No influence of clone was found and a 44-83% survival rate was found for different types of explants, the best result being that of using mature acorns germinated in vitro. The most efficient sterilization method was: mercuric chloride 0.2 mg/l, ascorbic acid 1 mg/l, for 30 min., with or without antibiotic. The best results were obtained with GD medium complemented with 0.5 mg/l BAP and 0.1 mg/l IBA, which allowed obtaining of a high rooting percentage. The regenerated plants were transferred in vivo, in a climate controlled greenhouse.

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Gulyás, Krisztina, Norbert Móricz, Ervin Rasztovits, Adrienn Horváth, Pál Balázs, and Imre Berki. "Accelerated Height Growth Versus Mortality of Quercus petraea (Matt.) Liebl. in Hungary." South-east European forestry 10, no. 1 (February 27, 2019): 1–7. http://dx.doi.org/10.15177/seefor.19-01.

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Background and Purpose: Due to climate change, it is important to know to what extent forests will be impacted by atmospheric changes. This study focuses on the height growth response of sessile oak (Quercus petraea (Matt.) Liebl.) to counteracting effects of fostering and interfering changes under contrasting climatic conditions with special attention to the xeric limit zone of this species. Materials and Methods: Twenty-eight sites were selected along a climatic gradient from the humid region in southwest Hungary to the continental-semiarid region in northeast Hungary where neighbouring old and young sessile oak stands were available for pair-wise comparison of height growth. While these young stands developed entirely in the significantly changed atmospheric conditions, the older trees lived only a part of their life time in such changed environment. The Ellenberg quotient (EQ) was used for describing climate aridity. Stand top height in each pair of old and young stands was measured to calculate the relative stand top height using yield tables of sessile oak for Hungary. Additionally, stand densities of old stands were measured. To demonstrate the height growth differences of old and young stands their relative stand top heights were compared as functions of EQ and stand density. Results: The relative top heights of the young stands were significantly higher than of the older stands, which means that the overall growing conditions were better in the last 30-35 years due to atmospheric changes than the mean conditions during the lifetime of old stands. Although extreme drought events associated with climate change caused reduced stand density due to periodic tree mortality at the xeric limit of sessile oak, the synergetic effect of all atmospheric changes was still sufficient enough to accelerate height growth. Conclusions: There has been an acceleration of height growth during the last decades despite the increased frequency of droughts. It cannot be concluded that height growth acceleration will continue in the future since climate models show an increasing tendency of dry extremes in Hungary that may overrule the positive fostering effect of atmospheric changes.

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Viewegh, Jiří, Stanislav Miltner, Karel Matějka, and Vilém Podrázský. "Comparison of the herb layer composition in stands of several tree species in the Louny region." Beskydy 9, no. 1-2 (2016): 41–48. http://dx.doi.org/10.11118/beskyd201609010041.

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Influence of introduced northern red oak stands (Quercus rubra L.) on herb understory with comparison with herb understory of autochthonous Sessile oak (Quercus petraea agg. L) and Scots pine (Pinus sylvestris L.) was observed in Louny region area on 14 plots. The analysis of the ground vegetation was performed using classical phytosociological methods. Significant changes were not determined in the site character, when comparing particular tree species stands, the differences consisted especially in the natural regeneration of tree species. Northern red oak showed a tendency of more fast penetration in the neighboring stands.

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Cvjeticanin, Rade, Olivera Kosanin, Milun Krstic, Marko Perovic, and Marijana Novakovic-Vukovic. "Phytocenological and edaphic characteristics of sessile oak forests on Miroc Mt in northeastern Serbia." Bulletin of the Faculty of Forestry, no. 107 (2013): 27–55. http://dx.doi.org/10.2298/gsf120425001c.

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This research was carried out in natural stands of sessile oak (Quercus petraea agg. Ehrendorfer 1967) on Miroc mountain. Three comunities were investigated: Pure sessile oak forest (Quercetum montanum Cer. et Jov. 1953. s.l.), sessile oak-common hornbeam forest (Querco-Carpinetum moesiacum Rud. 1949. s.l.) and sessile oak-balkan beech forest (Querco-Fagetum Glis. 1971). Pure sessile oak forests are found on the following soils: dystric ranker and acid cambic soil on sandstone, dystric ranker and acid cambisols on phyllite, and acid cambic soil on schists. Sessile oak-hornbeam forests grow on sandstone, granite and schists. Sessile oak-beech forests are found on acid cambisol on phyllite and sandstone conglomerate. Various ecological conditions (exposition, slope, altitude, soil types and bedrock) on Mt Miroc caused the occurence of diverse sessile oak forest communities, while different states of these forest stands resulted from the implementation of management measures.

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Korkut, Suleyman, Selman Karayilmazlar, Salim Hiziroglu, and Tolunay Sanli. "Some of the Properties of Heat-Treated Sessile Oak (Quercus petraea)." Forest Products Journal 60, no. 5 (September 2010): 473–80. http://dx.doi.org/10.13073/0015-7473-60.5.473.

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Barzdajn, Władysław. "Growth of the pedunculate oak (Quercus robur L.) and sessile oak (Q. petraea [Matt.] Liebl.) in 1994 provenance experiment in the Milicz Forest District." Forest Research Papers 70, no. 3 (September 1, 2009): 241–52. http://dx.doi.org/10.2478/v10111-009-0022-1.

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Kučera, Tomáš, Vladimír Kunca, and Jan Holec. "Comparison of habitats of the rare fungus Pluteus fenzlii between Białowieża Virgin Forest (Poland) and thermophilous forests (Slovakia)." Plant and Fungal Systematics 64, no. 1 (July 1, 2019): 101–10. http://dx.doi.org/10.2478/pfs-2019-0011.

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AbstractPluteus fenzlii is a rare Eurasian lignicolous fungus, an iconic bright yellow species that attracts attention. Its habitat in the Białowieża Virgin Forest, Poland, is dominated by Carpinus betulus with admixture of Quercus robur, Tilia cordata and Picea abies, with an herb layer typical for the Carpinion betuli alliance. In Slovakia, the country hosting the highest number of localities worldwide, P. fenzlii prefers closed canopy of thermophilous forest with dominance of Quercus cerris and adjacent Quercus robur agg., Q. petraea agg., Carpinus betulus and Tilia cordata. In the Natura 2000 classification this vegetation belongs to habitat 91M0, Pannonian-Balkanic Turkey Oak-Sessile Oak forests, and priority habitat 91G0, Pannonic woods with Quercus petraea and Carpinus betulus. The Slovak localities can be assigned to the mycosociological community Boleto (aerei)–Russuletum luteotactae, typical for thermophilous oak forests of Southern Europe and extrazonal areas in Central Europe. The presence of P. fenzlii at the isolated Białowieża locality could represent either a remote site of its present occurrence or a remnant of its former distribution, connected with the relict occurrence of thermophilous vegetation in Białowieża where continental oak forests have already disappeared.

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Cedro, Anna. "Tree-Ring Chronologies of Downy Oak (Quercus Pubescens), Pedunculate Oak (Q. Robur) and Sessile Oak (Q. Petraea) in the Bielinek Nature Reserve: Comparison of the Climatic Determinants of Tree-Ring Width." Geochronometria 26, no. -1 (January 1, 2007): 39–45. http://dx.doi.org/10.2478/v10003-007-0005-2.

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Tree-Ring Chronologies of Downy Oak (Quercus Pubescens), Pedunculate Oak (Q. Robur) and Sessile Oak (Q. Petraea) in the Bielinek Nature Reserve: Comparison of the Climatic Determinants of Tree-Ring WidthIn 2004-2006, 50 trees of downy oak (Quercus pubescens), pedunculate oak (Q. robur) and sessile oak (Q. petraea) were sampled in the Bielinek Nature Reserve. The following chronologies were established from their tree-ring series: OMS of 212 years (1793-2004) for downy oaks well as D10 of 183 years (1817-1999) and D13 of 211 years (1789-1999) for the two indigenous oak species pedunculate and sessile oak, respectively. These chronologies were used for signature years and response function analyses. All three chronologies were highly similar, which points to identical responses to the ambient meteorological conditions. The radial increment of downy oak depends primarily on the amount of precipitation. A high annual sum of precipitation, copious rain in spring-summer in particular, results in wide tree rings. Precipitation in form of rain and snow in winter, too, enhance tree growth by raising the groundwater level and improving the water supply in the habitat during the subsequent spring. Droughts in spring and summer, coupled with high air temperature, result in narrow rings. The tree-ring width/climate relationships at the two indigenous oak species are very similar to those of downy oak. Responses are, however, more distinct and with a higher statistical significance.

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Nestorovski, Ljupcho, Mitko Nacevski, Zdravko Trajanov, and Pande Trajkov. "Analysis of the amount of ash during sessile oak (Quercus petraea, Mattuschka) wood combustion." Bulletin of the Faculty of Forestry, suppl. (2015): 97–100. http://dx.doi.org/10.2298/gsf15s1097n.

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The subject of investigation in this paper is the amount of ash residue during combustion of Sessile oak (Quercus petraea, Mattuschka) wood that is one of the most usable ones as fire wood in households in the Republic of Macedonia. The purpose of this investigation was to establish the amount of ash, as one of the biggest problems during energy production with forest biomass. The material for this investigation is collected from two different regions of the State, in order to eliminate or to emphasise the influence of different stand conditions. The results from the investigation show that during the sessile oak wood combustion the wood produces less ash than wood with bark, and bark produces the highest amounts of ash.

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Grifoni, F. "Stem-quality of sessile oak (Quercus petraea(Matt.) Liebl.) trees, Tuscany, Italy." Forest@ - Rivista di Selvicoltura ed Ecologia Forestale 4, no. 1 (March 21, 2007): 126–30. http://dx.doi.org/10.3832/efor0434-0040126.

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Grotehusmann, H., and E. Schönfelder. "Comparison of French and German sessile oak (Quercus petraea (Matt.) Liebl.) provenances." Silvae Genetica 60, no. 1-6 (December 1, 2011): 186–96. http://dx.doi.org/10.1515/sg-2011-0025.

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Abstract Provenances originating from French and German sessile oak seed sources were analysed 23 years after planting at nine different locations in Northwest Germany. In general, German provenances are better adapted to the prevailing conditions of the test sites showing a better survival. Differences between the provenances in measured growth characters (“DBH”, “height”) were less pronounced than in observed quality parameters (“form”, “crown”). Five of the German provenances showed a better stem form; only three French provenances exceeded the overall mean. Variation in phenotypic stability between provenances could be observed as well as rank changes of provenances measured at different ages. Observed variation in stability was mainly attributable to single provenances, however, no pattern of variation could be detected. Besides the German seed sources “Bundesgebiet”, “Spessart” and “Göhrde” some French provenances (“Reno Valdieu”, “Bertranges”, “Darney” and “Der”) can be recommended as substitute in low crop years.

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Diaz-Maroto, Ignacio J., Pablo Vila-Lameiro, and M. C. Diaz-Maroto. "Autecology of sessile oak (Quercus petraea) in the north-west Iberian Peninsula." Scandinavian Journal of Forest Research 21, no. 6 (December 2006): 458–69. http://dx.doi.org/10.1080/02827580601066119.

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Folzer, H., J. F. Dat, N. Capelli, D. Rieffel, and P. M. Badot. "Response of sessile oak seedlings (Quercus petraea) to flooding: an integrated study." Tree Physiology 26, no. 6 (June 1, 2006): 759–66. http://dx.doi.org/10.1093/treephys/26.6.759.

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Kormanek, Mariusz, Tomasz Głąb, Jacek Banach, and Grzegorz Szewczyk. "Effects of soil bulk density on sessile oak Quercus petraea Liebl. seedlings." European Journal of Forest Research 134, no. 6 (July 29, 2015): 969–79. http://dx.doi.org/10.1007/s10342-015-0902-2.

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Akıllı, S., Ç. Ulubaş Serçe, Y. Z. Katırcıoğlu, and S. Maden. "DoesPythium anandrumcontribute to the dieback of sessile oak (Quercus petraea) in Turkey?" Forest Pathology 43, no. 6 (May 24, 2013): 505–8. http://dx.doi.org/10.1111/efp.12053.

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31

Gafenco (Pleșca), Ioana Maria, Bogdan Ionuț Pleșca, Ecaterina Nicoleta Apostol, and Neculae Șofletea. "Spring and Autumn Phenology in Sessile Oak (Quercus petraea) Near the Eastern Limit of Its Distribution Range." Forests 13, no. 7 (July 17, 2022): 1125. http://dx.doi.org/10.3390/f13071125.

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Due to the visible and predictable influence of climate change on species’ spatial distributions, the conservation of marginal peripheral populations has become topical in forestry research. This study aimed to assess the spring (budburst, leaf development, and flowering) and autumn (leaf senescence) phenology of sessile oak (Quercus petraea), a species widespread across European forests close to its ranges’ eastern limit. This study was performed in Romania between spring 2017 and 2020, and it included a transect with three low-altitude populations, a reference population from its inner range, and a sessile oak comparative trial. The temperature was recorded to relate changes to phenophase dynamics. We identified small variations between the reference and peripheral populations associated with climatic conditions. In the peripheral populations, budburst timing had day-of-year (DOY) values <100, suggesting that sessile oak may be more susceptible to late spring frost. Furthermore, we found spring phenophase timing to be more constant than autumn senescence. Moreover, budburst in the sessile oak comparative trial had obvious longitudinal tendencies, with an east to west delay of 0.5–1.4 days per degree. In addition, budburst timing influenced leaf development and flowering, but not the onset of leaf senescence. These findings improve our understanding of the relationship between spring and autumn phenophase dynamics and enhance conservation strategies regarding sessile oak genetic resources.

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Kremer, Antoine, Christophe Plomion, Thibault Leroy, Alexandre Hermine, Laura Truffaut, Sylvain Delzon, Alexis Ducousso, Brigitte Musch, José Manuel Torres-Ruiz, and Stefanie Wagner. "Évolution passée et contemporaine des chênes." Revue forestière française 72, no. 4 (August 31, 2020): 297–318. http://dx.doi.org/10.20870/revforfr.2020.5331.

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Dans cette revue, nous faisons le point sur les connaissances récentes acquises sur l’évolution des chênes blancs européens, depuis les origines et la diversification du genre Quercus jusqu’à leur évolution contemporaine, notamment en lien avec l’évolution du climat. Nous rappelons comment ces avancées ont été rendues possibles par l’amélioration des méthodes théoriques et méthodologiques pour l’étude des génomes et des sciences de l’évolution. Les données paléontologiques, couplées à des méthodes de génétique des populations, ont par exemple permis de mieux dater l’émergence des chênes blancs européens et de comprendre leur histoire évolutive. Les chênes blancs européens se sont progressivement différenciés génétiquement les uns des autres ; mais à la fin de la dernière période glaciaire ils se sont retrouvés en contact et ont échangé massivement des gènes entre eux. Ce changement de trajectoire a contribué à homogénéiser les génomes de ces espèces, sauf à quelques zones précises de leur génome, expliquant les préférences écologiques et autres différences toujours observables entre elles. Ces échanges génétiques ont aussi conduit à transférer des adaptations entre espèces, comme par exemple l’adaptation à l’altitude du Chêne sessile. Enfin, à une échelle contemporaine, nos analyses révèlent les changements génétiques et démographiques sur deux générations chez le Chêne sessile et chez le Chêne pédonculé. En conclusion, cette revue évoque des applications possibles de ces résultats dans la gestion et la conservation des chênaies.

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Buche, Gaëlle, Cyril Colas, Laëtitia Fougère, and Emilie Destandau. "Oak Species Quercus robur L. and Quercus petraea Liebl. Identification Based on UHPLC-HRMS/MS Molecular Networks." Metabolites 11, no. 10 (October 6, 2021): 684. http://dx.doi.org/10.3390/metabo11100684.

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Two species of oak are dominant in French forests: pedunculate oak (Quercus robur L.) and sessile oak (Quercus petraea Liebl.). Their differentiation is not straightforward but is essential to better understand their respective molecular content in order to better valorize them. Thus, to improve oak species identification, an untargeted UHPLC-HRMS/MS method associated with a two-step data treatment was developed to analyze a wide range of specialized metabolites enabling the comparison of both species of oak extracts. Pooled extracts from sessile and pedunculate oaks, composed of extracts from several trees of pure species from various origins, were compared using first the Venn diagram, as a quick way to get an initial idea of how close the extracts are, and then using a molecular network to visualize, on the one hand, the ions shared between the two species and, on the other hand, the compounds specific to one species. The molecular network showed that the two species shared common clusters mainly representative of tannins derivatives and that each species has specific molecules with similar fragmentation patterns, associated in specific clusters. This methodology was then applied to compare these two pooled extracts to unknown individuals in order to determine the species. The Venn diagram allowed for the quick presumption of the species of the individual and then the species could be assigned more precisely with the molecular network, at the level of specific clusters. This method, developed for the first time, has several interests. First, it makes it possible to discriminate the species and to correctly assign the species of unknown samples. Moreover, it gave an overview of the metabolite composition of each sample to better target oak tree utilization and valorization.

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Trenyik, Petra, Julianna Skutai, Orsolya Szirmai, and Szilárd Czóbel. "Instrumental analysis of health status of Quercus petraea stands in the Carpathian Basin." Central European Forestry Journal 65, no. 1 (March 1, 2019): 34–40. http://dx.doi.org/10.2478/forj-2019-0001.

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Abstract Numerous prognoses indicate that climate change will manifest itself in extreme climatic conditions. Therefore, it will be of high importance to know in what extent can plant communities and certain species adapt to altering environmental conditions. Our examinations were implemented in stands of sessile oak common in the Carpathian Basin. The reason behind it has been that, according to climatic models, the realized niche of this species can be reduced by 80% in some regions by 2050. Examinations were made in 3 points of an approximately 400 km long (East-West) transsect crossing the Carpathian Basin: 3 submontane regions of a subatlantic, a continental and a subcarpathian mountain were involved with 5 age groups in each regions. Health status examinations of sessile oaks have been completed by using FAKOPP 3D acoustic tomograph. Among the three venues trees of the subatlantic area were the healthiest; here, the 100 years old age group showed the lowest deterioration, only 0.68%. The most severely deteriorated stands occur in the continental region where the value in the 60 years old age group reached 4.24%. It seems that, besides annual precipitation, the method of planting also influences the health status of stands, since considerable differences could be observed between coppice and seedling stands.

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Tobisch, Tamás. "Effects of Artificial Regeneration Methods on Mortality, Growth and Shape of Oak Seedlings in a Central European Oak-Hornbeam Stand." Acta Silvatica et Lignaria Hungarica 3, no. 1 (January 1, 2007): 21–30. http://dx.doi.org/10.37045/aslh-2007-0002.

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This paper analyses the results of an artificial regeneration experiment carried out in an oak-hornbeam stand. The effects of initial seedling density (10200, 14300, 35700 stems per hectare), spacing geometry (140 cm x 70 cm, 240 cm x 40 cm), chemical (with Erunit and Nabu) and mechanical weeding of pedunculate (Quercus robur) and sessile oak (Quercus petraea) were examined at the age of eight years. The mortality of Q. robur seedlings was independent of the initial density but that of Q. petraea increased with it. Height and diameter growth of both species significantly decreased with the density, and the values of the diameter-to-height ratios (DHR) became smaller as the density increased. At approximately the same seedling density the mortality was lower but the seedlings were shorter, thinner and the values of DHR were smaller if the distance between stems was much lower than that between rows. Mechanical or chemical weeding did not affect considerably seedling mortality, growth or shape in any of the spacing types.

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Tobisch, Tamás. "Effects of Artificial Regeneration Methods on Mortality, Growth and Shape of Oak Seedlings in a Central – European Oak-Hornbeam Stand." Acta Silvatica et Lignaria Hungarica 4, no. 1 (January 1, 2008): 29–38. http://dx.doi.org/10.37045/aslh-2008-0003.

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This paper analyses the results of an artificial regeneration experiment carried out in an oak-hornbeam stand. The effects of initial seedling density (10200, 14300, 35700 stems per hectare), spacing geometry (140 cm x 70 cm, 240 cm x 40 cm), chemical (with Erunit and Nabu) and mechanical weeding of pedunculate (Quercus robur) and sessile oak (Quercus petraea) were examined at the age of eight years. The mortality of Q. robur seedlings was independent of the initial density but that of Q. petraea increased with it. Height and diameter growth of both species significantly decreased with the density, and the values of the diameter-to-height ratios (DHR) became smaller as the density increased. At approximately the same seedling density the mortality was lower but the seedlings were shorter, thinner and the values of DHR were smaller if the distance between stems was much lower than that between rows. Mechanical or chemical weeding did not affect considerably seedling mortality, growth or shape in any of the spacing types.

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Zagyvainé Kiss, Katalin Anita, Péter Kalicz, Péter Csáfordi, and Zoltán Gribovszki. "Forest Litter Interception Model for a Sessile Oak Forest." Acta Silvatica et Lignaria Hungarica 10, no. 1 (September 1, 2014): 91–101. http://dx.doi.org/10.2478/aslh-2014-0007.

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Abstract Models that describe hydrological processes in forests may help to estimate the consequences of forestry interventions or of climate change. The authors employed a hydrologic model for estimation of forest litter interception of a middle-aged sessile oak (Quercus petraea) stand. Antecedent water content and the storage capacity of the forest litter were the main parameters of the model. The antecedent water content of the litter was estimated by the daily precipitation and temperature data, collected in Hidegviz Valley research catchment in a three year measurement period (2006-2008). The measurements were done by an instrument we developed ourselves, where the undisturbed forest litter samples were enclosed in frames and measured in daily time steps.

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Arab, Leila, Stefan Seegmueller, Jürgen Kreuzwieser, Monika Eiblmeier, Michael Dannenmann, and Heinz Rennenberg. "Significance of current weather conditions for foliar traits of old-growth sessile oak (Quercus petraea Liebl) trees." Trees 36, no. 2 (December 6, 2021): 777–91. http://dx.doi.org/10.1007/s00468-021-02249-x.

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Abstract Key message Sessile oak leaves showed a high degree of plasticity to atmospheric and pedospheric conditions. Abstract The aim of the present study was to elucidate the significance of current weather conditions for foliar traits of adult sessile oak (Quercus petraea), one of the most valuable forest tree species in Central Europe. For this purpose, structural and functional traits were analysed in fully expanded, sun exposed leaves collected in south-west Germany from five old-growth forest stands, representing the meteorological and pedospheric conditions in the growing region, but differing in aridity during the 12 days before harvest in two consecutive years. Across the forest stands, most foliar traits differed significantly between wet and dry weather conditions before harvest as indicated by partial least square discriminant analysis (PLS-DA). These traits included fresh weight/dry weight ratio, leaf hydration, leaf-C content, leaf-C/N ratio, structural N, soluble protein-N, total amino acid-N, cell wall composition, numerous specific amino acids as well as soluble sugar content. Structural biomass, δ13C signature, total N and total C as well as H2O2 contents were not affected by the weather before harvest. These results indicate a high plasticity of the foliar metabolism of drought-tolerant sessile oak to current weather conditions. They also suggest that sessile oak is characterized by a high potential to cope with the growth conditions expected as a consequence of future climate change.

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Matoušková, Marie, Josef Urban, Daniel Volařík, Martina Hájíčková, and Radim Matula. "Coppicing modulates physiological responses of sessile oak (Quercus petraea Matt. Lieb.) to drought." Forest Ecology and Management 517 (August 2022): 120253. http://dx.doi.org/10.1016/j.foreco.2022.120253.

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40

Vural, A. "Assessment of Sessile Oak (Quercus petraea L.) Leaf as Bioindicator for Exploration Geochemistry." Acta Physica Polonica A 130, no. 1 (July 2016): 191–93. http://dx.doi.org/10.12693/aphyspola.130.191.

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41

Gričar, Jožica, Špela Jagodic, and Peter Prislan. "Structure and subsequent seasonal changes in the bark of sessile oak (Quercus petraea)." Trees 29, no. 3 (January 10, 2015): 747–57. http://dx.doi.org/10.1007/s00468-015-1153-z.

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42

Dobrovolný, Lumír, and J. Macháček. "Production potential and quality of sessile oak (Quercus petraea LIEBL.) in different types of mixtures." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 60, no. 6 (2012): 57–66. http://dx.doi.org/10.11118/actaun201260060057.

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Three variants of growing sessile oak (maturing high forest) on typical fertile sites of lower elevations in the Czech Republic were compared from the production and quality point of view. The variants were as follows: mixed forest unmanaged more than 30 years, mixed forest and pure stand subjected to standard management measures based on positive selection. Surprisingly, no essential differences were found either in the production potential or in the quality of sessile oak at comparing the managed mixed forest and the monoculture. A higher number of crop oak trees in the monoculture was compensated in the mixed forest by the representation of other tree species. The unmanaged mixed forest exhibited worse quality of oak crowns, which closely correlates with the volume yield. Therefore, it is recommended to apply tending measures on the principle of thinning from above with the comprehensive management of crowns in selected targeted trees even at their higher age.

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Sejdiu, Rrahim, Florit Hoxha, Bujar Jashari, and Lulzim Idrizi. "Physical properties of sessile oak (quercus petraea l) used by the wood industry in Kosovo." Technium: Romanian Journal of Applied Sciences and Technology 2, no. 7 (November 30, 2020): 278–85. http://dx.doi.org/10.47577/technium.v2i7.2009.

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The paper shows some physical properties of sessile oak obtained in Kosovo regions. In the study are shown: wood shrinkage, specific gravity, shrinkage coefficient for 1% change of moisture content, ratio of shrinkage in tangential and radial direction etc. The amount of volumetric shrinkage of sessile oak is 15.95%, heartwood part has an average shrinkage 15.41% in The shrinkage of sapwood part is 17.56%. Specific gravity at: wet condition: (1.013gr/cm3); 12% (0.853gr/cm3) and 0% (0.826gr/cm3) of moisture content. Specific gravity of heartwood at: wet condition (1.05gr/cm3); 12% (0.88gr/cm3); 0% (0.85gr/cm3). The specific gravity of sapwood at: wet condition (0.91gr/cm3); 12% (0.77gr/cm3); 0% (0.748gr/cm3). The ratio of average shrinkage between tangential and radial cutting direction is 1.71%. This ratio was significantly higher in sapwood than heartwood. Coefficient of shrinkage (changing 1% of moisture content) in the radial direction is 0.00196, and 0.00323 in tangential direction.

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Marchal, R., and F. Mothe. "Appréciation du bois de chêne (Quercus robur L, Quercus petraea Liebl) par les consommateurs et les professionnels français du bois." Annales des Sciences Forestières 51, no. 3 (1994): 213–31. http://dx.doi.org/10.1051/forest:19940302.

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45

Černý, Jakub, Ondřej Špulák, Martin Kománek, Eliška Žižková, and Petr Sýkora. "Sessile oak (Quercus petraea [Matt.] Liebl.) and its adaptation strategies in the context of global climate change: a review." Central European Forestry Journal 70, no. 2 (June 1, 2024): 77–94. http://dx.doi.org/10.2478/forj-2024-0012.

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Abstract This paper provides characteristic and a comprehensive overview of the adaptation strategies of sessile oak (Quercus petraea [Matt.] Liebl.) in the context of global climate change (GCC). The GCC is primarily manifested by increasing air temperatures and changing precipitation distribution. It poses a significant challenge to tree species including sessile oak, affecting its capacity for adaptation and survival. Despite the challenge, sessile oak shows significant drought tolerance due to its deep-reaching root system, which allows the tree to use available water more efficiently. Other adaptive strategies include the establishment of mixed stands that increase the resilience and biodiversity of the ecosystem. Adjustments of stand density through tending interventions play a significant role, helping to improve the stress resistance of stands. Additionally, coppice forest cultivation is applied on extremely dry sites. The sessile oak is also significant for its ecological plasticity – its ability to thrive on versatile soil and climatic conditions makes it a promising tree species for future forest management. Mixed stands with sessile oak and other tree species can enhance the ecosystem services of forests and also increase their endurance to GCC events. However, sessile oak faces several challenges, including the increasing risk of damage from pests and pathogens that require targeted measures for its protection and sustainable cultivation. The literature review suggests that a comprehensive understanding of sessile oak’s ecological requirements and interactions with the environment is crucial for its successful adaptation to GCC and the formulation of effective strategies for its protection and use in forest management.

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Schmitt, Volker, Annette Kußmaul, and Aloysius Wild. "Interaction of Elevated CO2 and Ozone Concentrations and Irrigation Regimes on Leaf Anatomy and Carbohydrate Status of Young Oak (Quercus petraea) Trees." Zeitschrift für Naturforschung C 54, no. 9-10 (October 1, 1999): 812–23. http://dx.doi.org/10.1515/znc-1999-9-1030.

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Young sessile oak (Quercus petraea) trees were exposed for one vegetation period in closed environmental chambers in a crossed factorial study on effects to varied CO2 concentrations, ozone concentrations and irrigation treatments. Elevated CO2 concentrations (ambient + 350 (μmol mol-1 ) caused a significant increase in biomass production, alterations in leaf anatomy and chloroplast ultrastructure as well as an increase in leaf starch content, as compared to ambient CO2 concentrations. The effects of elevated O3 concentrations and drought stress were far less distinct. The leaf starch content was influenced by CO2 and O3 in a synergistic manner

47

Torres-Ruiz, José M., Antoine Kremer, Madeline R. Carins Murphy, Tim Brodribb, Laurent J. Lamarque, Laura Truffaut, Fabrice Bonne, Alexis Ducousso, and Sylvain Delzon. "Genetic differentiation in functional traits among European sessile oak populations." Tree Physiology 39, no. 10 (October 1, 2019): 1736–49. http://dx.doi.org/10.1093/treephys/tpz090.

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Abstract The vulnerability of forest species and tree populations to climate change is related to the exposure of the ecosystem to extreme climatic conditions and to the adaptive capacity of the population to cope with those conditions. Adaptive capacity is a relatively under-researched topic within the forest science community, and there is an urgent need to understand to what extent particular combinations of traits have been shaped by natural selection under climatic gradients, potentially resulting in adaptive multi-trait associations. Thus, our aim was to quantify genetic variation in several leaf and woody traits that may contribute to multi-trait associations in which intra-specific variation could represent a source for species adaptation to climate change. A multi-trait approach was performed using nine Quercus petraea provenances originating from different locations that cover most of the species’ distribution range over Europe and that were grown in a common garden. Multiple adaptive differences were observed between oak provenances but also some evolutionary stasis. In addition, our results revealed higher genetic differentiation in traits related to phenology and growth than in those related to xylem anatomy, physiology and hydraulics, for which no genetic differentiation was observed. The multiple associations between those traits and climate variables resulting from multivariate and path analyses suggest a multi-trait association largely involving phenological and growth traits for Q. petraea.

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Mosedale, J. R., F. Feuillat, R. Baumes, J. L. Dupouey, and J. L. Puech. "Variability of wood extractives among Quercus robur and Quercus petraea trees from mixed stands and their relation to wood anatomy and leaf morphology." Canadian Journal of Forest Research 28, no. 7 (July 1, 1998): 994–1006. http://dx.doi.org/10.1139/x98-066.

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Heartwood ellagitannins and volatile extractives were studied by high-pressure liquid chromatography and gas chromatography - mass spectrometry after extraction of wood samples taken from 54 mature trees of pedunculate oak (Quercus robur L.) and sessile oak (Quercus petraea (Matt.) Liebl.) from 14 mixed stands located in the forest of Cîteaux (Bourgogne). These same trees had been previously subject to detailed study of leaf morphology and wood anatomy. Over 50 compounds, of diverse chemical types, were identified in the wood extracts and over 30 of these compounds were quantified. No species-specific extractives were identified, but the amounts of ellagitannins and a small number of volatile compounds, including cis- and trans-β-methyl-γ-octalactone isomers, were found to vary significantly between the two species. Multivariate analyses of these extractives allowed the classification of samples according to species, although less distinctly than similar analyses using leaf morphological characteristics. No strong intraspecific correlations between chemical constituents and anatomical or morphological characteristics were found that were common for both species. Nonetheless, sessile oaks displaying atypical wood anatomy were also less morphologically and chemically representative of their species. Trees possessing the lowest levels of cis- and trans-β-methyl-γ-octalactone are found to be those with a morphology the least distinct of either species.

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Bukara, Bogdan, and Goran Milic. "Razvoj diskoloracija i profili vlaznosti u hrastovoj rezanoj gradji tokom konvencionalnog susenja." Bulletin of the Faculty of Forestry, no. 128 (2023): 21–30. http://dx.doi.org/10.2298/gsf2328021b.

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In this study, the development of non-homogeneous color changes in oak timber during conventional drying and their relationship with the moisture gradient across the wood thickness were analyzed. The research was conducted on radial and tangential boards with a thickness of 38 mm, cut from two oak logs, one of sessile oak (Quercus petraea L.) and one of pedunculate oak (Quercus robur L.). A conventional drying schedule commonly used in enterprises was applied, and at specified time intervals samples were taken to determine the moisture content profile and monitor color changes on the cross sections of the samples. The findings reveal a complex relationship between the wood moisture content, the moisture content profile across the thickness, and the occurrence of color changes. Additionally, it was found that the wood of sessile oak dries slower and with less intense color changes compared to the wood of pedunculate oak. It was demonstrated that quarter-sawn boards dry slower compared to flat-sawn boards for both wood species. No differences in the appearance of non-homogeneous color between quarter-sawn and flat-sawn boards were identified.

50

Csóka, György, and Anikó Hirka. "Direct Effects of Carpophagous Insects on the Germination Ability and Early Abscission of Oak Acorns." Acta Silvatica et Lignaria Hungarica 2, no. 1 (January 1, 2006): 57–67. http://dx.doi.org/10.37045/aslh-2006-0005.

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Carpophagous insects play an important role in decreasing the viability of acorns in both direct and indirect ways. Therefore they significantly influence the reproductive potential of oaks. As a direct effect, their feeding on the embryo and on the cotyledons may prevent the germination of the acorn and on the other hand, their damage causes premature acorn abscission. During 3 years, 60 acorn samples from five oak species (Turkey oak – Quercus cerris, pedunculate oak – Quercus robur, sessile oak – Quercus petraea, downy oak – Quercus pubescens, red oak – Quercus rubra) have been investigated. The average rate of damage varied a lot between years, but was always significant (2000: 36%, 2001: 61%, 2002: 51%). The insects’ influence causing premature acorn abscission was significant both for pedunculate and Turkey oaks. The premature acorn abscission was 34% of the total crop in 2000 for pedunculate oak (Curculio spp. 26%, Cydia spp. 2% and Andricus quercuscalicis 6%) and 39% in 2001 (Curculio spp. 14%, Cydia spp. 2%, Andricus quercuscalicis 13%, Callirhytis glandium 10%). In case of Turkey oak it was 29% in 2001 (C. glandium 16%, Neuroterus saliens 13%, and 12% in 2002 (C. glandium 10%, N. saliens 2%).

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