Results 131 to 140 of about 397 (161)
Some of the next articles are maybe not open access.
Microchemical Journal, 2006
Abstract The Fraser fir ( Abies fraseri ) and balsam fir ( Abies balsamea ) are eastern North American conifers which have been infested by an exotic insect, the balsam woolly adelgid (BWA). BWA infestation has had particularly severe effects on Fraser fir, with up to 95% mortality rates at some sites, and is characterized by attack on mature trees ...
Samantha J. Carlow +7 more
openaire +1 more source
Abstract The Fraser fir ( Abies fraseri ) and balsam fir ( Abies balsamea ) are eastern North American conifers which have been infested by an exotic insect, the balsam woolly adelgid (BWA). BWA infestation has had particularly severe effects on Fraser fir, with up to 95% mortality rates at some sites, and is characterized by attack on mature trees ...
Samantha J. Carlow +7 more
openaire +1 more source
Effects of nitrogen form on nutrient uptake and physiology of Fraser fir (Abies fraseri)
Forest Ecology and Management, 2005Abstract Shade-tolerant conifer species are generally thought to prefer NH 4 + as a source of inorganic N and may perform poorly on recently disturbed sites or agricultural soils with high rates of nitrification. Fraser fir ( Abies fraseri ) is a highly shade-tolerant climax species characteristic of acidic forest soils that is now planted on a ...
David E. Rothstein, Bert M. Cregg
openaire +1 more source
Propagation of Abiesfraseri by softwood stem cuttings
Canadian Journal of Forest Research, 1985Effects of collection date, crown position, and indole-3-butyric acid concentration on rooting and subsequent vegetative growth of softwood cuttings taken from 14-year-old Fraser fir (Abiesfraseri (Pursh) Poir.) Christmas trees were studied. Indole-3-butyric acid levels producing maximum rooting (approximately 50%) varied with crown position and date ...
Farrell C. Wise +2 more
openaire +1 more source
Induction of embryogenesis in cultured mature zygotic embryos of Abies fraseri (Pursh) Poir
Plant Cell, Tissue and Organ Culture, 1997Embryo suspensor masses were induced by culture of isolated mature zygotic embryos of Fraser fir (Abies fraseri [Pursh] Poir.). Maximum induction frequencies were observed after 10 weeks culture on one-half strength Murashige and Skoog medium containing 10 µM thidiazuron and on one-half strength Verhagen and Wann medium containing 10 µM cytokinin [6 ...
Todd G. Guevin, Edward G. Kirby
openaire +1 more source
Oecologia, 2017
Multiple studies have examined the effects of clouds on shoot and canopy-level microclimate and physiological processes; none have yet done so on the scale of individual plant crowns. We compared incident photosynthetically active radiation (PAR), leaf temperatures, chlorophyll fluorescence, and photosynthetic gas exchange of shoots in three different ...
J Melissa, Hernandez-Moreno +3 more
openaire +2 more sources
Multiple studies have examined the effects of clouds on shoot and canopy-level microclimate and physiological processes; none have yet done so on the scale of individual plant crowns. We compared incident photosynthetically active radiation (PAR), leaf temperatures, chlorophyll fluorescence, and photosynthetic gas exchange of shoots in three different ...
J Melissa, Hernandez-Moreno +3 more
openaire +2 more sources
Experimental cloud immersion and foliar water uptake in saplings of Abies fraseri and Picea rubens
Trees, 2013Frequent cloud immersion events result in direct uptake of cloud water and improve plant water potentials during daylight hours in saplings of two dominant cloud forest species. In ecosystems with frequent cloud immersion, the influence on plant water balance can be important.
Z. Carter Berry, William K. Smith
openaire +1 more source
Microchemical Journal, 2000
Solid phase micro extraction (SPME) was investigated for the determination of volatile chemicals in the foliage of Fraser fir (Abies fraseri). Advantages of SPME include its speed, sensitivity, and ability to determine volatiles without chemical solvents. In this study, qualitative comparisons were performed of the volatiles emitted from living foliage
Delton A Vereen +2 more
openaire +1 more source
Solid phase micro extraction (SPME) was investigated for the determination of volatile chemicals in the foliage of Fraser fir (Abies fraseri). Advantages of SPME include its speed, sensitivity, and ability to determine volatiles without chemical solvents. In this study, qualitative comparisons were performed of the volatiles emitted from living foliage
Delton A Vereen +2 more
openaire +1 more source
Using irrigation and mulch to control cone production in Fraser fir (Abies fraseri)
Scandinavian Journal of Forest Research, 2016ABSTRACTFraser fir (Abies fraseri) is economically important as a Christmas tree in the United States, but trees often produce cones at a young age when grown in plantations in the Midwest. Early cone production is undesirable and decreases the economic value of the tree.
Brent A. Crain, Bert M. Cregg
openaire +1 more source
Agricultural and Forest Meteorology, 2012
Abstract The spruce-fir [Picea rubens Sarg.-Abies fraseri (Pursh) Poir.] forests of the southern Appalachian Mountains are considered refugial, endangered communities that exist on only seven mountaintop areas in Virginia and North Carolina, USA. These relict forests continue to be threatened by stress factors such as logging, acid rain deposition ...
Z. Carter Berry, William K. Smith
openaire +1 more source
Abstract The spruce-fir [Picea rubens Sarg.-Abies fraseri (Pursh) Poir.] forests of the southern Appalachian Mountains are considered refugial, endangered communities that exist on only seven mountaintop areas in Virginia and North Carolina, USA. These relict forests continue to be threatened by stress factors such as logging, acid rain deposition ...
Z. Carter Berry, William K. Smith
openaire +1 more source
American Midland Naturalist, 1944
No study of the pollen grains of the southern balsam fir, Abies Fraseri (Pursh) Poir., from the highest mountains of Virginia, North Carolina, and Tennessee, has been published which would assist in the identification of the species in investigations of southern sedimenits.
openaire +1 more source
No study of the pollen grains of the southern balsam fir, Abies Fraseri (Pursh) Poir., from the highest mountains of Virginia, North Carolina, and Tennessee, has been published which would assist in the identification of the species in investigations of southern sedimenits.
openaire +1 more source