Poplar, Populus

Hybrid poplars Populus deltoides x nigra) have attracted considerable interest since they are able to transport and metabolize—even though they do not generally degrade—diverse xenobiotics ... 

The use of hybrid poplar (Populus deltoides X P. nigra) has been examined in a few investigations at sites contaminated with creosote. There are several issues that complicate the interpretation of these results, including the physical state of the contaminants, the mechanism of uptake from the soil, and translocation and metabolism in the plants. These have seldom been addressed in studies of PAHs. 

Trametes (Coriolus) versicolor (CTB 863A) Poplar (Populus spp.) 12 38 Beckers eta/. (1994)... 

Ro DK, Mah N, EUis BE, Douglas CJ (2001) Functional characterization and subcellular localization of poplar (Populus trichocarpa x Populus deltoides) cinnamate 4-hydroxylase. Plant Physiol 126(1) 317-329... 

Balsam poplar Populus balsamifera Buds Snowshoe hare Mono- and sesquiterpenes Reichardtetfll., 1990b... 

Certain flavonoids are used by plants to protect them from invasion by parasites. For example, poplar (Populus spp.) cultivars produce a chemical barrier to parasitization by mistletoe (Viscum album).Resistant poplar cultivars were significantly higher in flavonols and flavones compared to susceptible cultivars. Likewise, in Streblus asper the bark and wood of trees that are resistant to the parasite Cuscuta reflexa hold higher levels of flavonoids, as well as steroids and alkaloids. 

Necklace cotoneaster C. conspicua decora S Poplar Populus spp. ST... 

Fig. 8-5. Comparison of results for concentrations of Zn, Pb and Cd in standardised leaves of the Lombardy poplar (Populus nigra Italica ) from different locations and years (from Wagner, 1993, reprinted with permission).

Poplar (Populus euramericana) MWLb - tension wood 497 513 1010 1 03... 

Populus alba L./White poplar Populus deletoides Bartr. ex — 67 52... 

Poplar, Populus Poppy, Papaver Pot marigold. Calendula Primrose, Primula Privet, Ligustrum Purple coneflower. Echinacea Pyracantha, Pyracantha Red cedar, Juniperus Rhododendron, Rhododendron Rock cress, Arab is Rose, Rosa... 

Fligh concentrations of air pollutants are known to kill many annual plants and trees. This amounts to a coarse biological indicator. Less severe exposures can cause premature senescence (early leaf drop) of sensitive species of trees and shrubs [39], which can be used as an indicator [40]. For example, the aspen poplar, Populus tremuloides, drops its leaves after exposure to as little as 0.34 ppm of sulfur dioxide for 1 hr. Early leaf drop slows tree growth, which can be qualitatively assessed by examining the growth ring widths from the tree cores. Several leaf drops in quick succession can kill trees or annual plants. 

P. Made] on, T. Maranon, J.M. Murillo et al.. White Poplar (Populus Alba) As a Biomonitor of Trace Elements in Contaminated Riparian Forests, Environ. Pollut. 132(1), 145-155, Nov. (2004). 

Figure 1.2. The transverse and tangential-longitudinal faces of the hardwood poplar, Populus sp. The wood comprises vessels arranged in radial groups and fibres both in the axial system of cells, as well as uniseriate parenchyma in the ray system. Magnification x 210.

POPLAR Populus tremuloides, Michx., family Salicaccac, gives the drug Populi tremula cortex, poplar bark. 

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

Ferulate 5-hydroxylase (F5H) catalyzes the third P-450 hydroxylation step at the C5 position of the phenolic ring to ultimately afford, via the monolignol pathway, 5-hydroxyconiferyl (22) and/or sinapyl (23) alcohols. This P-450 was first detected in xylem and sclerenchyma-enriched tissues from poplar Populus x euramericana), with microsomal extracts able to catalyze hydroxylation of ferulic acid (6) to 5-hydroxyferulic acid (7) in the presence of NADPH with apparent values of 6.3 pmoll / This enzyme was thus characterized as F5H. 

Red beech (Fagus sylvatica) / Lombardy Poplar (Populus nigra Ttalica ) Leaves... 

Several archaeological excavations provided samples of waterlogged European oak (Quercus sp.), European ash Fraxinus excelsior L.), Dutch elm Ulmus campestris L.), white-poplar Populus alba L.), and European spruce Picea abies (L.) Karst). The timbers were 400-2000 years old and had been covered by marine sediments. Cross sections were cut from timbers 10-20 cm in diameter and samples were taken from macroscopically discernible zones of different states of degradation, as well as from the border between these zones (Figure 1). 

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