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Showing 1 to 20 of 36 for “"Rhododendron"”.
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Ecology and Control of Rhododendron (Rhododendron ponticum L.) in Turkish Eastern Beech (Fagus orientalis Lipsky) Forests
Purple-flowered rhododendron (Rhododendron ponticum L.) and yellow-flowered rhododendron (R. flavum Don.) are two dominant shrub species of the eastern beech (Fagus orientalis L.) understories in the eastern and western Black Sea Region (BSR), respectively. These invasive woody species …
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The ecological significance of leaf movements in Rhododendron maximum
… the ecological significance of leaf movements in Rhododendron maximum, which is a subcanopy, evergreen species distributed in seasonally cold environments. Leaf movements could be necessary for maintaining a favorable energy balance and/or avoiding photoinhibition and photooxidation. A series of …
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Physiological and genetic mechanism(s) of cold acclimation in Rhododendron
… protocol for assessing cold hardiness (CH) in rhododendrons based on electrolyte-leakage was developed. The raw leakage data were transformed into percent-adjusted injury, which showed high correlation with injury data based on visual observations. The percent-adjusted injury data---fitted to …
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Physiological study of cold acclimation in Rhododendron sp. with emphasis on role of dehydrins
… during cold acclimation (CA) in a wide array of Rhododendron species. These species (24 in total) belong to two diverse subgenera, Hymenanthes and Rhododendron, native to diverse latitudes and altitudes. The dehydrin of interest is highly conserved in Rhododendron genus and was present and …
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Vegetative Anatomy of Rhododendron with a Focus on a Comparison between Temperate and Tropical Species
Rhododendron is a monophyletic group that inhabits many different climates. One clearly defined diversification was from temperate ancestors into tropical habitats. The focus of this work was to explore leaf and stem anatomical traits in relation to habitat (temperate and tropical) and elevation of …
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Effectiveness of Treatments to Reduce Rhododendron maximum and Promote Tree Seedling Regeneration in the Southern Appalachians
Rosebay rhododendron (Rhododendron maximum L.) is an evergreen ericaceous shrub that plays a dynamic role in the southern Appalachian forests. Commonly located on mesic sites, this understory shrub forms dense thickets that greatly reduce the amount of light available to herbaceous and woody plants …
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The Inhibitory Effect of Rhododendron maximum L. (Ericaceae) Thickets on Mycorrhizal Colonization of Canopy Tree Seedlings
Thickets of Rhododendron maximum (Rm) in the southern Appalachians impose severe limitations on the regeneration of hardwood and coniferous seedlings. Interactions between Rm thickets and ectomycorrhizal colonization were examined to explain seedling inhibition. Experimental blocks were established …
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The Short Term Responses of Benthic Macroinvertebrates to the Removal of Riparian Rhododendron in Southern Appalachian Streams
… This paper addresses the management impacts of Rhododendron maximum removal in the riparian and upslope areas previously occupied by hemlock. This study measured the consequences macroinvertebrates faced due to riparian Rhododendron removal from 300 m reaches of two low order streams. Two …
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Effects of prescribed burning, mechanical and chemical treatments to curtail rhododendron dominance and reduce wildfire fuel loads
Rosebay rhododendron (Rhododendron maximum L.) is an ericaceous shrub commonly found in riparian areas of the Appalachian Mountains. After more than a century of fire exclusion in the U.S., the distribution of R. maximum and its dominance of forest understories have increased. Rhododendron …
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The photoprotective role of thermonastic leaf movements in Rhododendron maximum: potential implications to early spring carbon gain
Rhododendron maximum L. is a dominant subcanopy species in the southern Appalachian Mountains. R. maximum undergo distinct thermonastic leaf movements (TLM). The purpose of these movements has not yet been determined. Previous studies have suggested TLM are a photoprotective mechanism for the …
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Microbial respiration on decaying leaves and sticks along an elevational gradient of a southern Appalachian stream
… Coweeta Hydrologic Laboratory, North Carolina. Rhododendron and birch leaves were placed in mesh bags in the stream at each site on 21 Oct 90. Oxygen uptake rates were measured for both leaf species beginning 15 Dec 90 and continuing monthly until leaves were no longer intact (birch-2 months, …
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Inhibition of Canopy Tree Seedlings by Thickets of <I>Rhododendron maximum</I> L. (Ericaceae) in an Eastern Deciduous Forest
<I>Rhododendron maximum</I> L. (Ericaceae) is an evergreen shrub that grows in dense thickets and currently covers large areas of the understory in the deciduous forests of the southeastern United States. Thickets of R. maximum are inhibitory to recruitment and regeneration of many understory …
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The influence of in vitro KCl treatments on the water relations and acclimatization of tissue-cultured Flame Azalea (Rhododendron calendulaceum)
… experiments, microshoots of the flame azalea (Rhododendron calendulaceum) were subcultured onto modified Woody Plant Medium amended with a wide range of KCl concentrations for various time periods. It was determined that microshoots did not grow well when cultured at in vitro KCl levels above …
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Studies in the comparative anatomy of the vessel elements of the secondary xylem of Acer nigrum, Platanus occidentalis, and Rhododendron maximum
… Nigrum, Platanus occidentalis</u>, and <u>Rhododendron maximum</u>.
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The response of four ericaceous shrub species to multiple environmental resource variation
… and water in an experimental garden study. <i>Rhododendron maximum</i> and <i>Kalmia latifolia</i> were able to acclimate photosynthetically to high and low irradiance under both high and low water availability. <i>Rhododendron catawbiense</i> and <i>R. minus</i> showed significantly higher …
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Aspects of phosphorus nutrition in endomycorrhizal fungi of the Ericaceae
… root systems of Vaccinium macrocarpon, Aiton, Rhododendron ponticum L., Calluna vulgaris (L.) Hull, Erica hispidula L., and E. mauritanica L.
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Regeneration and genetic transformation of rose and evergreen azalea
… and R. chinensis minima) and evergreen azalea (Rhododendron spp.), develop efficient and highly reliable regeneration systems via organogenesis and/or somatic embryogenesis, and develop gene transfer systems for these two important floral crops.
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Effects of land management and climate change on soil microbial communities in Appalachian forest ecosystems
… 1) How does a new forest management practice, Rhododendron understory removal, influence the ecosystem functions of soil microbial communities? 2) Do historical land management activities have long-term legacy effects on the structure and ecosystem functions of soil microbial communities? And …
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Leveraging the Landsat Archive to Track Understory Evergreen Shrub Expansions in the Coweeta Basin, North Carolina
… has driven two common evergreen shrubs, rosebay rhododendron (Rhododendron maximum) and mountain laurel (Kalmia latifolia), to expand and proliferate in areas where they were once restricted. These two common shrubs are recognized agents of change in Appalachian forests because of their abilities …
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Relationship of Ruffed Grouse Home Range Size and Movement to Landscape Characteristics in Southwestern Virginia
… and as the percent cover of a full (~75%) rhododendron and/or laurel understory within a grouse's home range increased, and decreased as the amount of high contrast edge in a bird's home range increased. Ruffed grouse were selecting areas with high densities of smaller than average patches …
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