Populus tremula

Populus tremula I O-extracts, leaves benzoic acid, catechol inhib d. mycorrhizal fungal growth 132... 

Waterfowl feeding in areas subjected to extensive nickel pollution — such as smelters and nickel-cadmium battery plants — are at special risk because waterfowl food plants in those areas contain 500 to 690 mg Ni/kg DW (Eastin and O Shea 1981). Dietary items of the ruffed grouse (Bonasa umbellus) near Sudbury, Ontario, had 32 to 95 mg Ni/kg DW, whereas nickel concentrations in grouse body tissues usually contain less than 10% of the dietary level. Nickel concentrations in aspen (Populus tremula) from the crop of ruffed grouse near Sudbury ranged from 62 mg/kg DW in May to 136 mg/kg DW in September (Chau and Kulikovsky-Cordeiro 1995), which shows the role of season in dietary nickel composition. 

Maximum values of average Cd concentrations are revealed in stem wood of the Aspen tree (Populus tremula). Median values of Cd content in other types of both deciduous and coniferous trees are lower than 0.2 mg/kg (Table 3, Figure 10). 

The dominant species are the spruce (Picea excelsa), the birch (Betula verrucosa, B. pubescens), the aspen (Populus tremula), and the alder (Aims incana). The moss and low bush layer is represented by the blueberry-bush (Vaccinium myrtiilus), hypnic mosses, separate species of cowberry (Vaccinium uliginosum) and flowering plants. The biomass of these Spruce Forest ecosystems reaches 10 ton/ha at the age of 100-150 years (Table 4). 

Plant Material. Wood samples were taken from a 20-year-old aspen tree (Populus tremula) harvested in France. Wood wafers (4 x 20 X 50 mm) were degraded by the wild type strain K3 of the white rot fungus P. chrysosporium at the STFI (Stockholm, Sweden) in the laboratory of Dr. K.-E. Eriksson. 

The phenolic D-glucosides salicin and tremuloidin (2-O-benzoyl-salicin) occurring in the bark of Populus tremula have been separated from each other, and from the other carbohydrates present, by gel... 

Populus tremula (aspen) 10-11 Very little 8-10 2 Tylose... 

Wood of Juvenile Poplar Populus Tremula x Populus Alba (six Month-old)... 

DCC Smith. p-Hydroxybenzoate groups in the lignin of aspen (Populus tremula). J Chem Soc 1955 2347-2351, 1955. 

SalLcin, a (2-hydroxyraethyl)-phenyl-P-D-glucQpyranoside, and its derivatives fragiiin, saiicortin, 2 -0-acetylsaiicortin, tremulacin and salirepttside are major constiiuenls of various Salix species. Salicin, saiicortin and tremulacin are also present in buds of Populus tremula L. 

Aspen (Populus tremula L, Populus tremuloides, Populus alba L, 47-53 18-24 13-18 14-21 44-53... 

Hedenas, H., Blomberg, P., Ericson, L. (2007). Significance of old aspen [Populus tremula) trees for the occurrence of lichen photobionts. Biological Conservation 135,380-387. 

Kreuzwieser, I, Scheerer, U., Rennenberg, H. (1999) Metabolic origin of acetaldehyde emitted by poplar (Populus tremula x P. alba) trees. Journal of Experimental Botany, 50, 757-765. 

Djerbi S., Aspeborg H., Nilsson R, Sundberg B., Mellerowicz E., Blomqvist K., and Teeri T.T. 2004. Identification and expression analysis of genes encoding putative cellulose synthases (CesA) in the hybrid aspen, Populus tremula (L.) X P. tremuloides (Michx.). Cellulose 11 301-312. 

Similar to Arabidopsis, 10 different CesA genes were first identified (Djerbi et al. 2004) by analyzing EST sequences in a collection of tissue specific cDNA libraries of poplars (Sterky et al. 2004). These CesA genes were named PttCesA (for Populus tremula x tremuloides, Ptt) followed by a number (1-9) reflecting... 

Figure 6-4. Relative abundance of the ten different PttCesA clones in the different tissue specific EST libraries from Populus tremula (L.) x tremuloides (Michx.). Data from Djerbi et al. 2003 See Color Plate of this figure beginning on page 355)...

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