Labrador Tea

2018 ◽  
pp. 169-170
Keyword(s):  
Labrador Tea

Prescribed burning for lowland black spruce regeneration in northern Minnesota

1984 ◽  
Vol 14 (1) ◽  
pp. 107-113 ◽  
Author(s):  
Scott E. Aksamit ◽  
Frank D. Irving
Keyword(s):  
Prescribed Burning ◽  
Black Spruce ◽  
Controlled Study ◽  
University Of Minnesota ◽  
Feather Moss ◽  
Wide Range ◽  
Labrador Tea ◽  
Tall Shrub ◽  
The University ◽  
Larger Sample

Concern over the variability of black spruce (Piceamariana (Mill.) B.S.P.) regeneration on peatlands in northern Minnesota following prescribed burning led to a cooperative study between the University of Minnesota and the Minnesota Department of Natural Resources. Twenty-seven black spruce cutovers on State lands that had been prescribed burned and either seeded or left to regenerate naturally were sampled. These were stratified into sphagnum – Labrador-tea – leather-leaf (SPHG) sites (10), feather moss (FM) sites (9), and alder – graminoid – other tall shrub (ALDR) sites (8). Results indicate that fire was not necessary to regenerate SPHG sites. FM sites required fire to modify unfavorable seedbeds and to reduce competition. Best results were obtained by burning when the upper layers of the peat were highly desiccated. ALDR sites occupied a wide range of ecological conditions which led to highly variable regeneration results. A larger sample size and possibly more carefully controlled study conditions are needed to fully understand ALDR site regeneration. Seeding results were uncertain for all sites.

scholarly journals Propagation of Twelve Alaska Native Plants by Summer Stem Cuttings

2009 ◽  
Vol 27 (4) ◽  
pp. 207-210
Author(s):  
Patricia S. Holloway ◽  
Mia R. Peterburs
Keyword(s):  
Alaska Native ◽  
Native Plants ◽  
Stem Cuttings ◽  
Populus Balsamifera ◽  
Alnus Viridis ◽  
Dwarf Birch ◽  
Labrador Tea ◽  
Bottom Heat ◽  
Salix Bebbiana ◽  
Collection Date

Abstract Twelve Alaska native plants were propagated from softwood and semi-hardwood stem cuttings collected from late June through August. Cuttings of new growth were treated with 0.3% indole-3-butyric acid powder and propagated in horticultural grade perlite and vermiculite (1:1 by vol) under intermittent mist with bottom heat [26C (79F)] in a greenhouse with a minimum night temperature of 15C (59F). After 6 weeks, cuttings were harvested and evaluated for rooting percentage and root quantity. Four species rooted poorly (< 25%) regardless of collection date: Siberian alder (Alnus viridis ssp. fruticosa), silverberry (Elaeagnus commutata), Bebb willow (Salix bebbiana) and shrub birch (Betula glandulosa). Best rooting (> 80%) occurred June 20 for: Beauverd spiraea (Spiraea stevenii), sweetgale (Myrica gale), and thinleaf alder (Alnus incana ssp. tenuifolia). Peak rooting for dwarf birch (Betula nana), feltleaf willow (Salix alaxensis), balsam poplar (Populus balsamifera), Labrador tea (Ledum groenlandicum) and littletree willow (Salix arbusculoides) was early to mid July. During peak rooting times, all successful species developed adequate root quantities for survival following transplanting.

scholarly journals Comparing the radioactive contamination of marsh Labrador tea (Ledum palustre L.) Over different periods since Chernobyl accident

2020 ◽  
Vol 5 (10 (107)) ◽  
pp. 35-43
Author(s):  
Volodymyr Krasnov ◽  
Oleksandr Orlov ◽  
Oleh Zhukovskyi ◽  
Mariia Korbut ◽  
Iryna Davydova ◽  
...  
Keyword(s):  
Radioactive Contamination ◽  
Chernobyl Accident ◽  
Ledum Palustre ◽  
Labrador Tea

scholarly journals Effects of Labrador Tea, Peppermint, and Winter Savory Essential Oils on Fusobacterium nucleatum

Antibiotics ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 794
Author(s):  
Amel Ben Lagha ◽  
Katy Vaillancourt ◽  
Patricia Maquera Huacho ◽  
Daniel Grenier
Keyword(s):  
Essential Oils ◽  
Fusobacterium Nucleatum ◽  
Significant Loss ◽  
Oral Keratinocytes ◽  
Mentha X Piperita ◽  
Luminescence Assay ◽  
Labrador Tea ◽  
Bad Breath ◽  
Bacterial Cell Membrane ◽  
Adenosine Triphosphate Production

Bad breath or halitosis is an oral condition caused by volatile sulfur compounds (VSC) produced by bacteria found in the dental and tongue biofilms. Fusobacterium nucleatum is a Gram-negative anaerobic bacterium that has been strongly associated with halitosis. In this study, essential oils (EO) from three plants, Labrador tea (Rhododendron groenlandicum [Oeder] Kron & Judd), peppermint (Mentha x piperita L.), and winter savory (Satureja montana L.), were investigated for their effects on growth, biofilm formation and killing, and VSC production by F. nucleatum. Moreover, their biocompatibility with oral keratinocytes was investigated. Using a broth microdilution assay, winter savory EO and to a lesser extent Labrador tea and peppermint EO showed antibacterial activity against F. nucleatum. A treatment of pre-formed biofilms of F. nucleatum with EO also significantly decreased bacterial viability as determined by a luminescence assay monitoring adenosine triphosphate production. The EO were found to permeabilize the bacterial cell membrane, suggesting that it represents the target of the tested EO. The three EO under investigation were able to dose-dependently reduce VSC production by F. nucleatum. Lastly, no significant loss of cell viability was observed when oral keratinocytes were treated with the EO at concentrations effective against F. nucleatum. This study supports the potential of Labrador tea, peppermint, and winter savory EO as promising agents to control halitosis and promote oral health.

scholarly journals ANALYSIS OF SPATIAL DISTRIBUTION OF MEDICINAL PLANTS USING GIS-TECHNOLOGIES ON THE EXAMPLE OF LISINSKY SCIENTIFIC-EXPERIMENTAL FORESTRY

2017 ◽  
Vol 7 (1) ◽  
pp. 88-95
Author(s):  
Никифоров ◽  
Aleksandr Nikiforov ◽  
Никифорова ◽  
Antonina Nikiforova
Keyword(s):  
Spatial Analysis ◽  
Medicinal Plants ◽  
Medicinal Plant ◽  
Raw Materials ◽  
Maximum Yield ◽  
Gis Technology ◽  
Stinging Nettle ◽  
Plant Raw Materials ◽  
Labrador Tea ◽  
Growing Conditions

Harvesting of medicinal-plant raw materials is one of the most promising areas for Russian producers, the market of which is characterized as developing one. Research on spatial analysis and definition of biological stock of medicinal-plant raw materials is made on the example of Lisinsky scientific-experimental forestry. The following medicinal plants: lily of the valley (Convallária majalis L.), St. John's wort (Hypéricum perforátum L.), valerian (Valeriána officinális L.), wood sorrel (Óxalis acetosella L.), Labrador tea (Ledum palustre L.), stinging nettle (Urtíca dióica L.) are widespread on the territory of the forestry and have potential commercial value. Data on stocks and territorial location of the medicinal plants were obtained with the use of geoinformation technologies. Biological stocks of medicinal raw materials is defined by the regional table for average long-term yield based on the types of growing conditions, forest types and taxonomic characteristics of plants. If we consider the maximum yield of one specific type of forest, we can say that Labrador tea and stinging nettle has the greatest mass. In the result, it was determined that harvesting of medicinal plants in the territory of forestry is possible for all the considered types of medicinal plants, which will increase the volumes of harvesting and storage of valuable raw materials. Inventory information and location of medicinal plants will enable to optimize the choice of the routes for the priority procurement of raw materials. Using GIS technology the total biological stock of the types of medicinal plants in Lisinsky scientific-experimental forestry was determined. Spatial analysis allowed determining the areas with the highest yield of medicinal plants. Geographic information systems can be used as a tool for monitoring, inventory, protection and organization of the industrial harvesting of medicinal raw materials. The developed technology can be used to determine the yield of mushrooms and wild berries.

Labrador Tea

2013 ◽  
pp. 421-427
Author(s):  
Ernest Small
Keyword(s):  
Labrador Tea

Lodgepole pine/Labrador tea type communities of western Canada

2002 ◽  
Vol 80 (2) ◽  
pp. 151-165 ◽  
Author(s):  
W L Strong
Keyword(s):  
Pinus Contorta ◽  
Lodgepole Pine ◽  
Inverse Correlation ◽  
Yukon Territory ◽  
Western Canada ◽  
Different Types ◽  
Successional Species ◽  
Labrador Tea ◽  
The Common ◽  
Ledum Groenlandicum

Lodgepole pine/Labrador tea (Pinus contorta Dougl. ex Loud. var. latifolia/Ledum groenlandicum Oeder) relevés were classified and characterized based on data from archival sources (n = 428). Eleven forest communities were recognized and were distinguished by the relative dominance of Sphagnum, Cladina and Cladonia, Lycopodium, Vaccinium species, or feathermosses. Picea mariana (Mill.) BSP was the common secondary successional species. Most paired-community comparisons were nonoverlapping in ordination space, although intermingling sometimes occurred along interfaces. Lodgepole pine/Labrador tea stands occurred on upland sites within the boreal–cordilleran ecoclimatic transition zone along the eastern slopes of the Rocky Mountains from southwestern Alberta to the southern Yukon Territory. Nine communities had mesic to subhygric moisture and submesotrophic to mesotrophic nutrient regimes. The exceptions were a Pinus contorta/Ledum groenlandicum/Sphagnum (wetter sites) and a Pinus contorta/Ledum groenlandicum/Cladina mitis (drier sites) community. An inverse correlation occurred between latitudinal location and elevation of occurrence (r = –0.56, P < 0.001, n = 403) with a northward decline of 65 m/100 km. The concept of a "type community" is proposed for formally documenting the composition of plant communities and optimizing the comparability of different types. Eight of the recognized communities fulfilled the proposed criteria for a type community and two were considered provisional types.Key words: vegetation classification, Pinus contorta, Ledum groenlandicum, type community.

Contribution of overwintering leaves to the growth of three broad-leaved, evergreen shrubs belonging to the Ericaceae family

1978 ◽  
Vol 56 (10) ◽  
pp. 1248-1261 ◽  
Author(s):  
R. J. Reader
Keyword(s):  
Growing Season ◽  
Leaf Nitrogen ◽  
Leaf Nitrogen Content ◽  
Nitrogen And Phosphorus ◽  
Southern Ontario ◽  
Plant Parts ◽  
Mature Leaves ◽  
Growing Seasons ◽  
Labrador Tea ◽  
Ledum Groenlandicum

Individual leaves of three bog ericads, leatherleaf (Chamaedaphne calyculata), bog laurel (Kalmia polifolia), and Labrador tea (Ledum groenlandicum), were retained for a maximum of two growing seasons in a peat bog in southern Ontario. The premature loss of mature leaves, resulting from artificial defoliation, significantly reduced the growth of new shoots of L. groenlandicum and K. polifolia but not of C. calyculata. Defoliation effects were directly proportional to the normal retention time for overwintering leaves. Mature leaves probably translocate photosynthate, nitrogen, and phosphorus to other plant parts. This would explain why leaf dry weights were greatest at the start, rather than at the end, of the leaves' second growing season. Net photosynthetic rates decreased with leafage, but in terms of leaf nitrogen content, new and old leaves fixed equal amounts of carbon.

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