hypoxia/oryza sativa

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In silico analysis of motifs in promoters of differentially expressed genes in rice (Oryza sativa L.) under anoxia.

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The aim of this study was to characterise the molecular mechanisms of transcriptional regulation of Differentially Expressed Genes (DEGs) in rice coleoptiles under anoxia by identifying motifs that are common in the promoter region of co-regulated genes. Un-changed DEGs (<2 fold and >-2),

Carbohydrate metabolism in germinating caryopses of Oryza sativa L. exposed to prolonged anoxia.

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Anoxia tolerance can be evaluated not only in terms of growth or survival of plant organs during oxygen deprivation, but also in relation to carbohydrate utilization in the context of a well-modulated fermentative metabolism. Rice (Oryza spp.) is unique among cereals, in that it has the distinctive

Dynamic and rapid changes in the transcriptome and epigenome during germination and in developing rice (Oryza sativa) coleoptiles under anoxia and re-oxygenation.

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Detailed molecular profiling of Oryza sativa (rice) was carried out to uncover the features that are essential for germination and early seedling growth under anoxic conditions. Temporal analysis of the transcriptome and methylome from germination to young seedlings under aerobic and anaerobic

Hypoxia induced non-apoptotic cellular changes during aerenchyma formation in rice (Oryza sativa L.) roots.

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The stress of low oxygen concentrations in a waterlogged environment is minimized in some plants that produce aerenchyma, a tissue characterized by prominent intercellular spaces. It is produced by the predictable collapse of root cortex cells, indicating a programmed cell death (PCD) and

Gene expression analysis, subcellular localization, and in planta antimicrobial activity of rice (Oryza sativa L.) defensin 7 and 8.

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Defensins are a group of plant antimicrobial peptides. In a previous study, it was reported that two recombinant rice (Oryza sativa L.) defensin (OsDEF) genes (OsDEF7 and OsDEF8) produced heterologously by bacteria inhibited the growth of several phytopathogen. Here, we analyzed gene expression

Soluble sugar availability of aerobically germinated barley, oat and rice coleoptiles in anoxia.

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Physiological and metabolic responses to anoxia were compared for aerobically germinated seedlings of barley (Hordeum vulgare), oat (Avena sativa) and rice (Oryza sativa). Coleoptile growth of barley, oat and rice seedlings was suppressed by a 24 h-anoxic stress, but the growth of the rice

Fatty acids of rice coleoptiles in air and anoxia.

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The metabolism of lipids, like that of other components, was adversely and strongly affected when rice (Oryza sativa L.) coleoptiles were grown anaerobically. In aerobic coleoptiles, the amounts of total fatty acid, phospholipid, and total lipid per coleoptile increased by 2.5- to 3-fold between

Sugar modulation of alpha-amylase genes under anoxia.

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Tolerance to low oxygen availability is likely to be due to the interaction of several factors. Sugar availability is one of the elements required to support anaerobic metabolism. In cereal grains the availability of soluble sugars is limited, while starch is stored in large amounts. Degradation of

Differences in the Anaerobic Lactate-Succinate Production and in the Changes of Cell Sap pH for Plants with High and Low Resistance to Anoxia.

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Anaerobically treated seedlings of Oryza sativa L. var arborio accumulated in their shoots more succinate than lactate and cell sap became alkaline. Conversely, in Triticum aestivum L. var MEK 86 lactate accumulation was far higher than that of succinate and cell sap was acidified. Anoxia clearly

Vacuolar H(+)-translocating pyrophosphatase is induced by anoxia or chilling in seedlings of rice.

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The present study was undertaken to determine whether vacuolar H(+)-pyrophosphatase (V-PPase) might replace vacuolar H(+)-ATPase under energy stress due to anoxia or chilling in anoxia-tolerant species such as rice (Oryza sativa L.) and corn (Zea mays L.). The relative transcript level of V-PPase in

Sugar utilization and anoxia tolerance in rice roots acclimated by hypoxic pretreatment.

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Although most cereal roots cannot elongate under anoxic conditions, primary roots of three-day-old rice (Oryza sativa L.) seedlings were able to elongate during a 24-h period of anoxia. Hypoxic pretreatment (H-PT) increased the elongation of their roots. Sucrose synthase (EC 2.4.1.13), glucokinase

Lactate Dehydrogenase in Oryza sativa L. Seedlings and Roots: Identification and Partial Characterization.

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A lactate dehydrogenase activity is present in rice (Oryza sativa L.) seedlings and roots. Under aerobic conditions, lactate dehydrogenase activity is barely detectable in rice seedlings and is very low in rice roots. In 30 day old roots, the activity is increased two to three times by an anoxic or

Differential expression of two fructokinases in Oryza sativa seedlings grown under aerobic and anaerobic conditions.

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Fructokinases (EC 2.7.1.4) may play an important role in carbohydrate metabolism of Oryza sativa L. (rice) seedlings under anoxia. We present here the molecular and biochemical characterizations of two rice fructokinases, namely OsFK1 and OsFK2. The results show that, at both a transcriptional and a

Effects of Hypoxia on 13NH4+ Fluxes in Rice Roots. Kinetics and compartmental analysis Kinetics and Compartmental Analysis

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Techniques of compartmental (efflux) and kinetic influx analyses with the radiotracer 13NH4+ were used to examine the adaptation to hypoxia (15, 35, and 50% O2 saturation) of root N uptake and metabolism in 3-week-old hydroponically grown rice (Oryza sativa L., cv IR72) seedlings. A time-dependence

Effects of anoxia on mitochondrial biogenesis in rice shoots: modification of in organello translation characteristics.

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Shoots of germinating rice (Oryza sativa L.) seedlings are able to grow under anoxia and to withstand long periods of anoxic treatment. Mitochondria were purified from aerobically germinated and anaerobically treated rice shoots by differential and isopycnic centrifugation and were found to consist

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