Acer pseudoplatanus

Small proportions of 4-linked Xylp residues were found in linkage analyses of potato cell-wall preparations (Ring and Selvendran, 1978) and of 1 M and 4 M KOH soluble extracts (Ring and Selvendran, 1981). At least some of these residues may be present in heteroxylans of primary cell walls. Such heteroxylans are known to occur in small proportions in the primary cell walls of other eudicotyledons, but their structure has been characterized in detail only for those in the walls of suspension-cultured sycamore (Acer pseudoplatanus) cells (Darvill et al., 1980). These heteroxylans are glucuronoarabinoxylans with a backbone of p-D-Xyl/ residues linked... 

Figure 3.4 Structures of the galactoglucomannan (a heteromannan) known to occur in the primary cell walls of several species of eudicotyledons and the glucuronoarabinoxylan (a heteroxylan) known to occur in the primary cell walls of sycamore (Acer pseudoplatanus). The structures of the heteromannans and heteroxylans in potato cell walls are unknown.

Steijiades, R., Dean, J. F. D., and Eriksson, K.-E. L., 1992, Laccase from sycamore maple (Acer pseudoplatanus) polymerizes monolignols, Plant Physiol. 99 1162-1168. 

Nimz HH, Nemr M, Schmidt P, Margot C, Schaub B, Schlosser M (1982) Carbon 13 NMR spectra of lignins 9 Spin lattice relaxation times and determination of interunit linkages in three hardwood lignins (Alnus glutinosa, Corylus avellana and Acer pseudoplatanus) J Wood Chem Technol 2 371-382... 

Fifteen-day-old suspension cultures of Acer pseudoplatanus grown in Murashige and Skoog medium with 3% Glc, 4.4 pM 6-benzylaminopurine (BA) and 0.45 xM 2,4-dichlorophenoxyacetic acid (2,4-D) readily took up 100 mg/1 of [2-3H]MI over 24 h and utilized up to 20% for pectin biosynthesis. Virtually all of this 3H was recovered in galacturonosyl and pentosyl residues. Increasing the BA level 10-fold drastically blocked [2-3H]MI uptake and little was available for pectin biosynthesis. Increasing the 2,4-D level 10-fold had little or no effect on [2-3H]MI uptake but did diminish the amount of 3H appearing in pectin (Verma et al., 1976). 

Loewus, M.W., and Loewus, F.A., 1971, The isolation and characterization of D-glucose 6-phosphate cycloaldolase (NAD-dependent) from Acer pseudoplatanus L. cell cultures. Is occurrence in plants. Plant Physiol. 48 255-260. 

Roberts, R.M., and Loewus, F., 1966, Inositol metabolism in plants. III. Conversion of myo-inositol-2-3H to cell wall polysaccharides in sycamore (Acer pseudoplatanus L.) cell culture. Plant Physiol. 41 1489-1498. 

Verma, D.C., Tarvares, I, and Loewus, F.A., 1976, Effect of benzyladenine, 2,4-dichlorophenoxyacetic acid, and D-glucose in myo-inositol metabolism in Acer pseudoplatanus L. cells grown in suspension culture. Plant Physiol. 37 241-244. 

A plantation of sycamore Acer pseudoplatanus) on sandy soil to the north of Recklinghausen in the Ruhr district showed extended marginal... 

Table 5 - Element content in leaves of sycamore (Acer pseudoplatanus L.). Arithmetic mean and standard deviation of 8 sick and 8 healthy looking plants. All values in pg g" dry material (= ppm).

Table 6 - Soil profile beside a sycamore tree (Acer pseudoplatanus L.) in the Haard forest, north of Recklinghausen, Germany.

Plate 19. Heavy injury on leaves of sycamore (Acer pseudoplatanus L.) maple showing marginal necroses which are not due to fluoride pollution because of low fluoride contents in leaves. Lack of magnesium as a rc.sult of soil acidification by acid rain may be the reason. Haard Forest, North to Recklinghausen, W. Germany, 1982. 

Corylus avellana and Acer pseudoplatanus). C NMR of lignins. Methoxyl aryl ratio. 

Trees. The major hypotheses that have been proposed to explain the patterns of decay development and its restriction in the wood (xylem) of living trees are outlined briefly. Furthermore, the current understanding of the biochemical and physiological events that contribute to the protection of pre-existing functional sapwood was reviewed with particular reference to the formation of reaction zones at the host-pathogen interface in Acer species, especially the European sycamore maple Acer pseudoplatanus). 

Vacuoles of plant cells (Acer pseudoplatanus) H liquid membrane micropipet (tridodecylamine as neutral ligand) pH 6-6.5 K15... 

The most likely explanation is that callus excretes a second factor that cooperates with CF in stimulating cell proliferation. We may ask why this factor, which is dialyzable, is not present in our CF preparation and why it does not migrate into the medium. It is unlikely that this factor is a volatile compound, which has been suggested as CF in Acer pseudoplatanus L. cultures (5). The effect of a volatile, in fact, should spread over the whole dish although in our experiments, it was strictly limited in the area under the nurse cells. 

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