A plant family of the order Fagales, subclass Hamamelidae, class Magnoliopsida. They have simple, serrate, alternate leaves. Male flowers are borne in long, pendulous catkins; the female in shorter, pendulous or erect catkins. The fruit is usually a small nut or a short-winged samara.
A plant genus of the family BETULACEAE that is distinguished from birch (BETULA) by its usually stalked winter buds and by cones that remain on the branches after the small, winged nutlets are released.
A plant genus of the family BETULACEAE known for the edible nuts.

Comparative analysis of pollen counts of Corylus, Alnus and Betula in Szczecin, Warsaw and Lublin (2000-2001). (1/18)

The aim of the study was to compare the airborne concentrations of allergenic pollen produced by three early flowering tree taxa (Corylus, Alnus, Betula) in the cities of Warsaw (central Poland), Lublin (eastern Poland) and Szczecin (western Poland) during the years 2000-2001. Measurements were performed by the volumetric method. Pollen seasons were defined as the periods in which 95% of the total catch occurred. The highest concentration and annual pollen count of Corylus was measured in Lublin in both seasons, while the highest annual pollen counts of Alnus and Betula were noted in Warsaw, where the annual pollen count of Betula in 2001 was four times higher than in 2000 and equalled 5,376 grains in m3 per 24 h. Significant differences in the pollen count of the examined taxa were observed between two seasons: the pollen count of Corylus was higher in 2000 than in 2001, while for Alnus and Betula the opposite was the case. The longest pollen seasons were observed at low annual pollen counts for the pollen of Corylus. Results of the study reveal significant differences between the seasons and the cities. The differences concern the dates of the appearance of pollen grains in the air, the duration of the presence of sporomorphs and the maximum concentrations in particular seasons. The pollen counts of alder, birch and hazel trees are determined by the weather, diversity of local flora and specific rhythm of pollination of particular taxa.  (+info)

Bacteria associated with hazelnut (Corylus avellana L.) decline are of two groups: Pseudomonas avellanae and strains resembling P. syringae pv. syringae. (2/18)

A total of 118 fluorescent pseudomonads associated with hazelnut decline, which has been occurring for many years in different areas of northern Greece and Italy, were assessed by performing a repetitive PCR analysis with enterobacterial repetitive intergenic consensus, box element, and repetive extragenic palindromic primer sets, sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) of whole-cell protein extracts, a carbon compound utilization analysis, and an analysis to determine the presence of the syrB gene. A subset of 53 strains was also characterized by amplified 16S ribosomal DNA restriction analysis (ARDRA) by using nine restriction endonucleases. The virulence of 40 representative strains was assessed by using serial doses. The pathogenic specificities of the strains were also verified. ARDRA carried out with HinfI revealed two main groups of strains, groups A and B, which exhibited a level of similarity of 57%. The other eight restriction endonucleases used did not separate the strains. In addition, a cluster analysis performed by the unweighted pair group method using arithmetic averages after repetitive PCR and SDS-PAGE of protein extracts also revealed the same two groups. Furthermore, the differential utilization of some carbon compounds made it possible to differentiate the groups. Virulence assessment clearly indicated that the group A strains are very virulent, whereas the group B strains proved to be mildly virulent for hazelnut. Group A included the strains isolated in northern Greece and central Italy (i.e., the province of Viterbo); these strains do not have the syrB gene, are pathogenically restricted to Corylus avellana, and belong to Pseudomonas avellanae. Group B includes the other strains obtained from hazelnut cultivated in Piedmont, Campania, Latium, Sicily, and Sardinia. They represent a distinct taxon closely related to Pseudomonas syringae pv. syringae.  (+info)

Differences in spatial autocorrelation between four sub-populations of Alnus trabeculosa Hand.-Mazz. (Betulaceae). (3/18)

To investigate the spatial structure of Alnus trabeculosa Hand.-Mazz, we compared three sub-populations at Imaichi in Tochigi Prefecture and one sub-population at Juo in Ibaraki Prefecture, Japan. A total of 269 trees, covering 0.71 ha in total, were mapped and genetically analyzed using nine enzyme systems encoding 13 isozyme loci. There were no significant differences between the four sub-populations in terms of Na,Ne, H(o), H(e )and F(IS). However, according to spatial autocorrelation analysis, the Juo sub-population, which is younger than the others, showed an aggregation of multilocus genotypes, especially within 25 m radii. In contrast with the Juo sub-population, those in Imaichi showed no clear spatial structuring. In the three Imaichi sub-populations, gametic phase disequilibrium is attributable to heterogeneity of genotype frequencies, but in the Juo sub-population it seems to be due to other factors, connected with the composition of the trees in the sub-population and/or its founder population, gene flow and asexual propagation. To conserve as much as possible of the genes or genotypes in restricted areas, conservation of populations that do not show clear family structures, such as those in Imaichi, would be most effective.  (+info)

Isozyme polymorphisms provide evidence of clinal variation with elevation in Nothofagus pumilio. (4/18)

Variable physical conditions along elevational gradients strongly influence patterns of genetic differentiation in tree species. Here, the hypothesis is tested that different growth forms of Nothofagus pumilio, which characterizes the subalpine forests in the southern Andes, will display continuous genetic variation with elevation. At each of four elevational strips in three different mountain ranges, fresh leaf tissue was sampled from 30 randomly selected individuals to be analyzed by protein electrophoresis. Allelic frequencies were used to test for heterogeneity across populations and to classify populations into different elevational strips by discriminant analysis. The degree of population divergence was estimated by F(ST). Clinical variation on within-population genetic characteristics was analyzed by linear regressions against elevation. Seven enzyme systems coded for 14 putative isozyme loci, 57% of which were polymorphic in at least one population. Allele frequencies significantly varied with elevation and discriminant analysis separated populations at different elevational strips. Among-population divergence within any mountain range was small, but greater than among different mountain ranges. Overall, low-elevation populations were more variable than high-elevation populations, and regression analyses suggested continuous variation in populations of N. pumilio 100 m apart. Marked stepwise phenological differences on mountain slopes are most probably responsible for the isolation of nearby populations.  (+info)

Ecological and genetic effects of cutting in an Alnus trabeculosa Hand.-Mazz. (Betulaceae) population. (5/18)

In order to assess the ecological and genetic effects of cutting, we compared two portions of Alnus trabeculosa population at Yuda (Iwate Prefecture, Japan): one that has been cut about 30 years ago and one that has remained uncut. These portions were compared in terms of the degree of sprouting, genetic variation and gene distribution using isozyme markers. First, we determined the multilocus genotype (MLG) of all ramets, then sorted them into individuals according to the distribution of the MLGs. The average (+/- SE) of largest distance between ramets in one individual was 2.1 (+/- 0.18) m, which is consistent with the distance (2.0 (+/- 0.20) m) obtained by tracing physical connections between ramets. We found no significant differences in genetic variation between the two portions, but there were significant differences in their degree of sprouting. Furthermore, there were striking differences in gene distribution: the cut portion showed greater clustering of individuals with identical genetic components, which may be due to regeneration in the gaps made by cutting, reflecting the location of the mother trees, and seed and pollen dispersal from them.  (+info)

Self-organized origami. (6/18)

In origami, form follows the sequential spatial organization of folds. This requires continuous intervention and raises a natural question: Can origami arise through self-organization? We answer this affirmatively by examining the possible physical origin for the Miura-ori leaf-folding patterns that arise naturally in insect wings, leaves, and other laminae-like organelles. In particular, we point out examples where biaxial compression of an elastically supported thin film, such as that due to differential growth, shrinkage, desiccation, or thermal expansion, spontaneously generates these patterns, and we provide a simple theoretical explanation for their occurrence.  (+info)

Carbon flux and growth in mature deciduous forest trees exposed to elevated CO2. (7/18)

Whether rising atmospheric carbon dioxide (CO2) concentrations will cause forests to grow faster and store more carbon is an open question. Using free air CO2 release in combination with a canopy crane, we found an immediate and sustained enhancement of carbon flux through 35-meter-tall temperate forest trees when exposed to elevated CO2. However, there was no overall stimulation in stem growth and leaf litter production after 4 years. Photosynthetic capacity was not reduced, leaf chemistry changes were minor, and tree species differed in their responses. Although growing vigorously, these trees did not accrete more biomass carbon in stems in response to elevated CO2, thus challenging projections of growth responses derived from tests with smaller trees.  (+info)

Rising atmospheric CO2 reduces sequestration of root-derived soil carbon. (8/18)

Forests have a key role as carbon sinks, which could potentially mitigate the continuing increase in atmospheric carbon dioxide concentration and associated climate change. We show that carbon dioxide enrichment, although causing short-term growth stimulation in a range of European tree species, also leads to an increase in soil microbial respiration and a marked decline in sequestration of root-derived carbon in the soil. These findings indicate that, should similar processes operate in forest ecosystems, the size of the annual terrestrial carbon sink may be substantially reduced, resulting in a positive feedback on the rate of increase in atmospheric carbon dioxide concentration.  (+info)

Betulaceae is a family of flowering plants that includes birch, alder, and hornbeam trees and shrubs. It is commonly known as the birch family. These plants are characterized by their simple, alternate leaves, small catkins (flowers), and woody fruits. They are widely distributed in temperate and subarctic regions of the Northern Hemisphere.

In a medical context, Betulaceae may be mentioned in relation to the use of certain plant parts for medicinal purposes. For example, the bark of some birch trees contains salicylic acid, which has been used in the treatment of pain and inflammation. However, it is important to note that the use of any herbal remedy should be discussed with a healthcare provider beforehand, as they can interact with other medications and have potential side effects.

"Alnus" is a genus of flowering plants in the family Betulaceae, commonly known as alders. They are deciduous or evergreen trees or shrubs with simple, alternate leaves and catkins. The term "Alnus" itself is the genus name and does not have a medical definition. However, various species of alders have been used in traditional medicine for their anti-inflammatory, astringent, and diuretic properties. For example, the bark of Alnus glutinosa (common alder) has been used to treat skin diseases, wounds, and diarrhea. It is important to note that the use of alders in modern medicine is limited and further research is needed to establish their safety and efficacy.

'Corylus' is the medical term for the genus of plants that includes hazelnuts and filberts. These trees and shrubs are part of the Betulaceae family, which also includes birch and alder trees. The nuts produced by Corylus species are a valuable food source for both humans and wildlife.

The most commonly cultivated species of Corylus is the European hazelnut (Corylus avellana), which is native to Europe and western Asia. This species is grown commercially in many parts of the world for its sweet, edible nuts. The North American beaked hazelnut (Corylus cornuta) and the North American round-leaf hazelnut (Corylus americana) are also cultivated to a lesser extent for their nuts.

In addition to their nutritional value, Corylus species have been used in traditional medicine for centuries. The bark, leaves, and nuts of these plants contain various compounds that have been found to have anti-inflammatory, antioxidant, and antimicrobial properties. However, more research is needed to fully understand the potential health benefits of Corylus species and their active constituents.

... have described these two groups as subfamilies within an expanded Betulaceae: Betuloideae and Coryloideae. Betulaceae flowers ... The Betulaceae are believed to have originated at the end of the Cretaceous period (about 70 million years ago) in central ... Betulaceae, the birch family, includes six genera of deciduous nut-bearing trees and shrubs, including the birches, alders, ... Chen Z-D, Manchester SR, Sun H-Y (1999). "Phylogeny and evolution of the Betulaceae as inferred from DNA sequences, morphology ...
... pendula Carpinus betulus Corylus avellana Corylus colurna Ostrya carpinifolia Wikispecies has information related to Betulaceae ...
Govaerts R (1996). "Proposal to reject the name Betula alba (Betulaceae)". Taxon. 45: 697-698. doi:10.2307/1224262. JSTOR ... is a species of tree in the family Betulaceae, native to Europe and parts of Asia, though in southern Europe, it is only found ... Betulaceae". Bosnian Journal of Basic Medical Sciences. 9 (1): 31-38. doi:10.17305/bjbms.2009.2853. PMC 5645545. PMID 19284392 ...
"Betulaceae." The Forester's Manual; Or, The Forest Trees of Eastern North America ... 10th ed. Vol. 9. Garden City, NY: ... Alnus serrulata, the hazel alder or smooth alder, is a thicket-forming shrub in the family Betulaceae. It is native to eastern ...
Betulaceae)". Rhodora. 81 (826): 151. Retrieved 18 December 2015. Macbride, J.F. (1937). "Betulaceae". Flora of Peru. Vol. 13 ( ...
Betulaceae); Dipterygium (Capparidaceae); Brassaiopsis, Cuphocarpus*, Dendropanax*, Didymopanax*, Fatsia*, Oreopanax*, ...
IPNI, Betulaceae, Type. Christenhusz, Fay & Chase 2017, p. 282. POWO, Betulaceae. Stearn 2002, p. 80. IPNI, Cannabaceae, Type. ...
They have been reported from plants in 10 different families, e.g. Betulaceae and Zingiberaceae. A diarylheptanoid is an ... Betulaceae). Acerogenin M can be found in Acer nikoense (Sapindaceae). Jugcathayenoside and (+)-galeon can be found in the root ...
Betulaceae Alnus sp. Betula luminifera aff. Carpinus miocenica Sapindaceae †Acer angustilobum †Acer tribolatum Anacardiaceae ...
Betulaceae family 2. Corylaceae family 2. Stylocerataceae family 3. Ticodendraceae order 3. Myricales family 1. Myricaceae ...
Family 49, Betulaceae. In Burger, W. (Ed.), Flora Costaricensis. Fieldiana: Botany. 40: 56-58. Idárraga-Piedrahita, A., R. D. C ... Alnus acuminata is a species of deciduous tree in the Betulaceae family. It is found in montane forests from central Mexico to ...
Costatae, Betulaceae) in China". Annals of Botany. 129 (4): 415-428. doi:10.1093/aob/mcac001. ISSN 0305-7364. PMC 8944703. PMID ...
Betulaceae Gray Casuarinaceae R.Br. Fagaceae Dumort. §Juglandaceae DC. ex Perleb (including Rhoipteleaceae Hand.-Mazz.) ...
L.D.Gomez Betulaceae Gray, nom. cons. Cucurbitales Juss. ex Bercht. & J.Presl Apodanthaceae Tiegh. ex Takht. * Anisophylleaceae ...
Betulaceae, Corylaceae, Fagaceae, Ticodendraceae; Corylaceae now being included within Betulaceae); this arrangement is ... The families and genera currently included are as follows: Betulaceae - birch family (Alnus, Betula, Carpinus, Corylus, Ostrya ...
... s are trees comprising the genus Alnus in the birch family Betulaceae. The genus comprises about 35 species of monoecious ... "Plastomes of Betulaceae and phylogenetic implications". Journal of Systematics and Evolution. 57 (5): 508-518. doi:10.1111/jse. ... Betulaceae) Inferred from Sequences of Nuclear Ribosomal DNA ITS Region". International Journal of Plant Sciences. 165 (2): 325 ...
Retrieved 12 June 2010.[permanent dead link] "Betulaceae Betula jacquemontii Spach". International Plant Names Index. Retrieved ...
Betulaceae), and katsura (Cercidiphyllum). Analysis of nearby fossil leaf sites from central Ellesmere Island of the same age ...
Family: Betulaceae, Genus Alnus: Alnus glutinosa (L.) Gaertn., not indigenous, cultivated, naturalised, invasive Genus Betula: ...
Larvae feed on Betulaceae, Rosaceae and Ericaceae species. They eat the developing leaves, flowers and fruits. They also roll ...
Tree Family Betulaceae Diagnostic photos of many species, Morton Arboretum specimens Eichhorn, Markus (July 2010). "The Birch ... A birch is a thin-leaved deciduous hardwood tree of the genus Betula (/ˈbɛtjʊlə/), in the family Betulaceae, which also ... Old Irish bethe, Welsh bedw). Within Betulaceae, birches are most closely related to alder. The oldest known birch fossils are ... Betulaceae)". Systematic Botany. 30 (1): 118-133. doi:10.1600/0363644053661850. ISSN 0363-6445. S2CID 86080433. Birches. (A ...
It is most closely related to the family Betulaceae. It was discovered only in 1989 in Costa Rica, having been overlooked ...
Betulaceae From The Pliocene And Pleistocene Of Southwest Alabama, Southeastern United States. Review Of Palaeobotany And ... Coryloideae is a subfamily in the woody angiosperm family Betulaceae, commonly known as the birch family, and consists of four ... While the division of the extant members of the Betulaceae into six genera is uncontroversial, the placement of these genera ... A few authors have divided the genera into two families, the Betulaceae (Alnus, Betula) and Corylaceae (Carpinus, Ostrya, ...
The Grunewald forest is mainly composed of conifers and betulaceae. Some areas are nature reserves (Naturschutzgebiet), ...
Tianmu iron tree') is a tree in the Betulaceae family. It can grow up to 15 metres (49 ft) tall. It is endemic to Zhejiang ...
... is a species of plant in the Betulaceae family. It is endemic to China. Betula halophila is a tetraploid, ...
Betulaceae)". Biochemical Systematics and Ecology. 33 (7): 749-752. doi:10.1016/j.bse.2004.10.005. UmiKalsom, Yusuf; Harborne, ...
... is a species of tree in the family Betulaceae. It is endemic to Japan. Shaw, K.; Roy , S.; Wilson, B. (2014). " ...
Other tree families represented are Betulaceae, Hamamelidaceae, Lauraceae, Sapotaceae, and Elaeocarpaceae. Montane broadleaf ...
Glutinic acid, a substituted allene, was isolated from Alnus glutinosa (Betulaceae). While polyunsaturated fatty acids are ...

No data available that match "betulaceae"


  • In the past, the family was often divided into two families, Betulaceae (Alnus, Betula) and Corylaceae (the rest). (wikipedia.org)
  • Pollen of the representatives of the family Betulaceae accounted for a signifi cant proportion of total pollen (34% on an average), predominated by Betula pollen and considerably lower proportion of Alnus sp. (aaem.pl)
  • The word or phrase betulaceae refers to monoecious trees and shrubs (including the genera Betula and Alnus and Carpinus and Corylus and Ostrya and Ostryopsis). (shabdkosh.com)
  • Molecular phylogeny and genome size evolution of the genus Betula (Betulaceae). (wikimedia.org)
  • and the family Betulaceae Gray (Bremer et al. (springer.com)
  • Find betulaceae similar words, betulaceae synonyms. (shabdkosh.com)
  • Recent treatments, including the Angiosperm Phylogeny Group, have described these two groups as subfamilies within an expanded Betulaceae: Betuloideae and Coryloideae. (wikipedia.org)
  • According to molecular phylogeny, the closest relatives of the Betulaceae are the Casuarinaceae, or the she-oaks. (wikipedia.org)
  • Phylogeny and Phytogeography of the Betulaceae (Cont. (jse.ac.cn)
  • Betulaceae flowers are monoecious, meaning that they have both male and female flowers on the same tree. (wikipedia.org)
  • Wikimedia Commons has media related to Betulaceae. (wikipedia.org)
  • Leaf and infructescence fossils of Alnus (Betulaceae) from the late Eocene of the southeastern Qinghai-Tibetan Plateau[J]. J Syst Evol, 2019, 57(2): 105-113. (jse.ac.cn)
  • Recent treatments, including the Angiosperm Phylogeny Group, have described these two groups as subfamilies within an expanded Betulaceae: Betuloideae and Coryloideae. (wikipedia.org)
  • The paper presents Betulaceae taxa (Fagales) associated with longicorn beetle taxa of Turkey for the first time. (munisentzool.org)
  • As a result, the members of Betulaceae family are preferred by a total of 87 species or species-group taxa of longicorn beetles of Turkey. (munisentzool.org)
  • The only native members of Betulaceae in the Bay Area are California Hazelnut, and the Red and White Alders. (montara.com)
  • According to molecular phylogeny, the closest relatives of the Betulaceae are the Casuarinaceae, or the she-oaks. (wikipedia.org)
  • The pollen of modern Betulaceae is much more specialized than that of modern Hamamelidales, however, and the relationships of the Normapolles complex to Juglandaceae, Fagaceae, and other amentiferous groups, as well as to Betulaceae, are not certain. (asu.edu)
  • Other represented families were Betulaceae (birch), Lauraceae (laurels), Selineae (umbellifiers) and Triticeae (cultivated grasses). (aina.org)
  • 1993). The ancestor of more advanced Hamamelidae (including Betulaceae) may have been a member of the Normapolles complex, a Cretaceous fossil pollen flora that includes grains similar in structure to those of the modern Betulaceae (J. A. Doyle 1969). (asu.edu)
  • We analyzed SNPs in the genomes of 80 birch individuals spanning most of the geographic range of B. pendula , as well as seven other members of Betulaceae. (nature.com)
  • Betulaceae flowers are monoecious, meaning that they have both male and female flowers on the same tree. (wikipedia.org)
  • The Betulaceae are believed to have originated at the end of the Cretaceous period (about 70 million years ago) in central China. (wikipedia.org)
  • Costatae, Betulaceae) in China. (bvsalud.org)
  • Betulaceae in general, and Alders in particular, have complex arrangements with bacteria and fungi for the delivery of nutrients through their root systems. (montara.com)