Aspen tree

White-red-jack pine 2 -90 10% from aspen trees... 

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). 

As one can see from distribution of Cd concentration values in deciduous trees, there are three separate sections in this line. The first one amalgamates most wood samples, excepting Aspen tree samples. The second and third parts of the distribution line consist mostly the Aspen tree samples taken from two different... 

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. 

In addition to pine, fir and spruce, the following woods are used, especially in countries to which these are indigenous, viz. aspen, poplar, lime, beech and willow, and to a more limited extent, alder-w<. Aspen wood, which comes mainly from Russia, is very easy to fiake and gives splints of uniform size. The strips of wood for match boxes are also made from the aspen tree and on the same machine. It is probable that for match splints aspen wood will supplant pine wood in this country. 

Chevalier RL. The moth and the aspen tree sodium in early postnatal development. Kidney Int 2001 59 1617-25. 

The quaking aspen tree (Populus tremuloides) is a common tree in North America that is used for its timber. The wood-rotting pathogen Phellinus tre-mulae causes significant economic losses of this tree. Although the sesqui-terpenoid metabolites such as tremulenolide A (5.89) have a carbon skeleton that is isomeric with the lactaranes, some doubts have been expressed on its biosynthetic origin from farnesyl diphosphate. 

The secondary cell wall grows after the primary cell wall is formed. It contains various amounts of cellulose, depending on the plant about 93% for cotton seed hair, 53% in trunks of the aspen tree, 41 % in the birch tree trunks, 50% in wheat straw, 26% in clover, and 52% in soy bean shells. 

Researchers in Korea, in 1997, announced the development of a biodegradable plastic made from fibers in genetically engineered aspen trees. Their methodology included the use of chemical catalysts as well as modification of the genetic content of the tree. ... 

Liang X. and Joshi C.P. 2004. Molecular cloning of ten distinct hypervariable regions from the cellulose synthase gene superfamily in aspen trees. Tree Physiol 24 543-550. 

Kalluri U.C. and Joshi C.R (2003). Isolation and characterization of a new, fiill-length cellulose synthase cDNA, PtrCesAS from developing xylem of aspen trees. J. Exp. Bot. 54 2187-2188. 

Kalluri U.C. and Joshi C.R (2004). Differential expression patterns of two cellulose synthase genes are associated with primary and secondary cell wall development in aspen trees. Rlanta 220 47-55. 

Joshi C. 2003. Xylem-specific and tension stress-responsive expression of cellulose synthase genes from aspen trees. Appl Biochem Biotechnol 105 17-26. 

Samuga A. and Joshi C.P. 2004. Cloning and characterization of cellulose synthase-like gene, PtrCSLD2 from developing xylem of aspen trees. Physiol Plant 120(4) 631-641. 

Calfapietra C, Wiberley AE, Falbel TG, Linskey AR, Mugnozza GS, Kamosky DF, Loreto F, Sharkey TD (2007) Isoprene synthase expression and protein levels are reduced under elevated O3 but under elevated CO2 (FACE) in field-grown aspen trees. Plant Cell Environ 30 654-661... 

Aspen tree hydrolyzate was reported to give a higher glucose yield in comparison with other softwood and hardwood biomass (Table 16.2). Since glucose is in higher content among... 

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