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14 rezultatima
Stimulation of ascorbate-induced hypoxia by lignin.
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Alkali-lignin, lignin sulfonate or protein-bound polysaccharide (PSK) significantly enhanced the ascorbyl radical intensity and cytotoxic activity of ascorbate, but inhibited the intracellular incorporation of [14C]ascorbic acid. These natural products also enhanced ascorbate-induced oxygen
Lignin decomposition is sustained under fluctuating redox conditions in humid tropical forest soils.
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Lignin mineralization represents a critical flux in the terrestrial carbon (C) cycle, yet little is known about mechanisms and environmental factors controlling lignin breakdown in mineral soils. Hypoxia is thought to suppress lignin decomposition, yet potential effects of oxygen (O2 ) variability
Hypoxia enhances lignification and affects the anatomical structure in hydroponic cultivation of carrot taproot.
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UNASSIGNED
Hypoxia enhances lignification of carrot root. Hypoxia stress was thought to be one of the major abiotic stresses that inhibiting the growth and development of higher plants. The genes encoding the plant alcohol dehydrogenase (ADH-P) were induced when suffering hypoxia. To investigate the
Sauchinone inhibits hypoxia-induced epithelial-mesenchymal transition in pancreatic ductal adenocarcinoma cells through the Wnt/β-catenin pathway
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The hypoxic microenvironment is commonly found in various solid tumors including pancreatic ductal adenocarcinoma (PDAC). Saururus chinensis is a medicinal Chinese herb widely used because of documented anti-inflammatory and anti-angiogenic properties. Sauchinone is special active lignin extracted
Differential response of gray poplar leaves and roots underpins stress adaptation during hypoxia.
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The molecular and physiological responses of gray poplar (Populus x canescens) following root hypoxia were studied in roots and leaves using transcript and metabolite profiling. The results indicate that there were changes in metabolite levels in both organs, but changes in transcript abundance were
Reversible N epsilon-lysine acetylation regulates the activity of acyl-CoA synthetases involved in anaerobic benzoate catabolism in Rhodopseudomonas palustris.
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Rhodopseudomonas palustris grows photoheterotrophically on aromatic compounds available in aquatic environments rich in plant-derived lignin. Benzoate degradation is regulated at the transcriptional level in R. palustris in response to anoxia and the presence of benzoate and/or benzoyl-CoA (Bz-CoA).
Redox fluctuations control the coupled cycling of iron and carbon in tropical forest soils.
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Oscillating redox conditions are a common feature of humid tropical forest soils, driven by an ample supply and dynamics of reductants, high moisture, microbial oxygen consumption, and finely textured clays that limit diffusion. However, the net result of variable soil redox regimes on iron (Fe)
Sink Status and Photosynthetic Rate of the Leaflet Galls Induced by Bystracoccus mataybae (Eriococcidae) on Matayba guianensis (Sapindaceae).
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The galling insect Bystracoccus mataybae (Eriococcidae) induces green and intralaminar galls on leaflets of Matayba guianensis (Sapindaceae), and promotes a high oxidative stress in host plant tissues. This biotic stress is assumed by the histochemical detection of hydrogen peroxide, a reactive
Small-Molecule Acetylation Controls the Degradation of Benzoate and Photosynthesis in Rhodopseudomonas palustris.
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The degradation of lignin-derived aromatic compounds such as benzoate has been extensively studied in Rhodopseudomonas palustris, and the chemistry underpinning the conversion of benzoate to acetyl coenzyme A (acetyl-CoA) is well understood. Here we characterize the last unknown gene, badL, of the
Tradeoffs in soil carbon protection mechanisms under aerobic and anaerobic conditions.
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Oxygen (O2 ) limitation is generally understood to suppress soil carbon (C) decomposition and is a key mechanism impacting terrestrial C stocks under global change. Yet, O2 limitation may differentially impact kinetic or thermodynamic vs. physico-chemical C protection
Macelignan protects against renal ischemia-reperfusion injury via inhibition of inflammation and apoptosis of renal epithelial cells.
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Ischemia-reperfusion injury (IRI) refers to tissue damage that occurs when blood supply returns to tissue after a period of ischemia, anoxia or hypoxia. It occurs frequently during shock, organ transplantation and heart failure. It can cause impairment or even renal failure. Macelignan is a lignin
Antioxidants, oxidative damage and oxygen deprivation stress: a review.
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Oxidative stress is induced by a wide range of environmental factors including UV stress, pathogen invasion (hypersensitive reaction), herbicide action and oxygen shortage. Oxygen deprivation stress in plant cells is distinguished by three physiologically different states: transient hypoxia, anoxia
The Synthesis and Role of β-Alanine in Plants.
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Most studies on amino acids are focused on the proteinogenic amino acids given their essential roles in protein synthesis among other pathways. In addition to 20 ubiquitous amino acids used in protein synthesis, plants synthesize over 250 non-proteinogenic amino acids that are involved in the
The exodermis: a variable apoplastic barrier.
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The exodermis (hypodermis with Casparian bands) of plant roots represents a barrier of variable resistance to the radial flow of both water and solutes and may contribute substantially to the overall resistance. The variability is a result largely of changes in structure and anatomy of developing
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