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populus wilsonii/antioksidantti
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Sivu 1 alkaen 143 tuloksia
Antioxidant polyphenols from Populus alba growing in Georgia.
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The aim of the study was to evaluate natural antioxidant properties of Populus alba. The antioxidant effects in plants are mainly due to the presence of phenolic compounds such as flavonoids, phenolic acids, tannins and phenolic diterpenes. Oxidative damage is implicated in most diseases processes.
Response of photosynthesis and cellular antioxidants to ozone in populus leaves.
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Atmospheric ozone causes formation of various highly reactive intermediates (e.g. peroxyl and superoxide radicals, H(2)O(2), etc.) in plant tissues. A plant's productivity in environments with ozone may be related to its ability to scavenge the free radicals formed. The effects of ozone on
Antioxidative properties of alcoholic extracts from Fraxinus excelsior, Populus tremula and Solidago virgaurea.
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Aqueous-ethanolic extracts from Fraxinus excelsior, Populus tremula and Solidago virgaurea inhibit biochemical model reactions representing inflammatory situations to various extents. These model reactions include xanthine oxidase, diaphorase in the presence of the autoxidizable quinone juglone,
Changes in antioxidant enzyme activities and isozyme profiles in leaves of male and female Populus cathayana infected with Melampsora larici-populina.
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Populus cathayana Rehd., a dioecious tree species, is widely distributed in the northern, central and southwestern regions of China. In poplars, Melampsora larici-populina Kleb. is mainly responsible for rust disease, which is considered to be the world's most important disease of poplars. Yet,
The ozone sensitivity of five poplar clones is not related to stomatal conductance, constitutive antioxidant levels and morphology of leaves.
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Ground-level ozone (O3) is an important phytotoxic air pollutant in China. In order to compare the sensitivity of common poplar clones to O3 in China and explore the possible mechanism, five poplar clones, clone DQ (Populus cathayana), clone 84 K (P. alba × P. glandulosa),
Antioxidant phenolic glycosides from the bark of Populus ussuriensis Kom.
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Study on the EtOAc soluble fraction from the bark of Populus ussuriensis Kom. resulted in the isolation of three phenolic glycosides, including populoside (1), 7-O-ρ-coumaroylsalirepin (2) and 7-O-caffeoylsalirepin (3), among which 3 is a new compound. The structures of these compounds were
Water stress induces changes in polyphenol profile and antioxidant capacity in poplar plants (Populus spp.).
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This paper is aimed to characterize young poplar plants under the influence of water stress provoked by polyethileneglycol 6000 (PEG 6000). Three polar genotypes (M1, B229, and PE19/66) were grown in hydroponics and subjected to 100 and 200 mOsm PEG 6000 during six days. Polyphenol characterization,
Comparative photochemistry activity and antioxidant responses in male and female Populus cathayana cuttings inoculated with arbuscular mycorrhizal fungi under salt.
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We investigated the impact of arbuscular mycorrhizal fungi (AMF) on the morphology and physiology of two genders of the typical dioecious plant Populus cathayana under salt stress. We conducted a pot experiment containing seedlings of the two genders that were subjected to salt or non-salt and
Could the differences in O(3) sensitivity between two poplar clones be related to a difference in antioxidant defense and secondary metabolic response to O(3) influx?
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Increasing global background concentrations of tropospheric ozone (O(3)) are expected to affect both crops and forest ecosystems negatively. The phytotoxic effects of O(3) are mainly associated with the O(3)-induced production of reactive oxygen species (ROS) in excess of the ability of the plant to
Two Poplar Hybrid Clones Differ in Phenolic Antioxidant Levels and Polyphenol Oxidase Activity in Response to High Salt and Boron Irrigation.
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Poplar hybrids can be used for selenium (Se) and boron (B) phytoremediation under saline conditions. The phenolic antioxidant stress response of two salt and B tolerant poplar hybrids of parentage Populus trichocarpa × nigra × deltoides was studied using high-performance liquid chromatography (HPLC)
Thresholds of heavy-metal toxicity in cuttings of European black poplar (Populus nigra L.) determined according to antioxidant status of fine roots and morphometrical disorders.
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The effects of increasing concentrations of polluted soils collected from two different stands in the direct neighbourhood of a copper smelter were studied by analyzing the activity of lipid peroxidation and antioxidant enzymes in the fine roots of cuttings of black poplar (Populus nigra L.).
Effects of Cd, Zn, or Pb Stress in Populus alba berolinensis on the Antioxidant, Detoxifying, and Digestive Enzymes of Lymantria dispar.
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For investigating the physiological responses of herbivores to the heavy metal-stressed woody host plants, the activities of antioxidant, detoxifying, and digestive enzymes in the gypsy moth larvae, Lymantria dispar, that were fed with different heavy metal-stressed poplar seedling (Populus alba
Stress hardening under long-term cadmium treatment is correlated with the activation of antioxidative defence and iron acquisition of chloroplasts in Populus.
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Cadmium (Cd), a highly toxic heavy metal affects growth and metabolic pathways in plants, including photosynthesis. Though Cd is a transition metal with no redox capacity, it generates reactive oxygen species (ROS) indirectly and causes oxidative stress. Nevertheless, the mechanisms involved in
Phenolic compounds in the leaves of Populus ussuriensis and their antioxidant activities.
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Two new phenolic glucosides [isograndidentatin A (1) isograndidentatin B (2)], 5 known phenolic glucosides [grandidentatin (3), salireposide (4), populoside (5), populoside A (6), and salicortin (7)], and 2 known phenolic acids [P-coumaric acid (8) and caffeic acid (9)] were isolated from the leaves
Overexpression of glutathione reductase but not glutathione synthetase leads to increases in antioxidant capacity and resistance to photoinhibition in poplar trees.
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A poplar hybrid, Populus tremula x Populus alba, was transformed with the bacterial genes for either glutathione reductase (GR) (gor) or glutathione synthetase (GS) (gshII). When the gor gene was targeted to the chloroplasts, leaf GR activities were up to 1000 times greater than in all other lines.
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