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manganese/pomme de terre
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Expression of an Arabidopsis CAX2 variant in potato tubers increases calcium levels with no accumulation of manganese.
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Previously, we made a chimeric Arabidopsis thaliana vacuolar transporter CAX2B [a variant of N-terminus truncated form of CAX2 (sCAX2) containing the "B" domain from CAX1] that has enhanced calcium (Ca(2+)) substrate specificity and lost the manganese (Mn(2+)) transport capability of sCAX2. Here, we
Potato mitochondrial manganese superoxide dismutase is an RNA-binding protein.
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An RNA-binding protein present in potato mitochondrial lysates was purified and identified as manganese-containing superoxide dismutase (MnSOD). Using a gel mobility shift assay we found that proteins from mitochondrial lysates bind with high affinity to in vitro transcripts of mitochondrial orf206,
Evaluation of abiotic stress tolerance in transgenic potato plants with reduced expression of PSII manganese stabilizing protein.
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Manganese stabilizing protein (MSP) is an important component of the Photosystem II (PSII) oxygen evolving complex. In our previous work, transgenic potato plants with reduced expression of MSP (MSP-As) were developed and their physiological and biochemical responses were studied. In this report, we
Physiological and biochemical responses of transgenic potato plants with altered expression of PSII manganese stabilizing protein.
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Manganese-stabilizing protein (MSP) represents a key component of the oxygen-evolving complex (OEC). Transgenic potato plants with both enhanced (sense) and reduced (anti-sense) MSP expression levels were generated to investigate the possible physiological role of MSP in overall plant growth,
Potato carrot agar with manganese as an isolation medium for Alternaria, Epicoccum and Phoma.
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A semi-selective medium for isolation of Alternaria spp., Epicoccum sp. and Phoma spp. from soil and plant samples was developed. The basal medium was a modified potato carrot agar (PCA), containing 10 g/L of potato and carrot. It is known that the target genera sporulate well on standard PCA when
The presence of essential histidine residues in manganese(III)-containing acid phosphatase from sweet potato.
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Chemical modification studies of manganese(III)-containing acid phosphatase [EC 3.1.3.2] were carried out to investigate the contributions of specific amino-acid side-chains to the catalytic activity. Incubation of the enzyme with N-ethylmaleimide at pH 7.0 caused a significant loss of the enzyme
Titration of potato virus Y by aphid transmission as affected by leaf development and supply of manganese.
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HISTOLOGICAL STRUCTURE OF POTATO STEMS AND LEAVES AS INFLUENCED BY MANGANESE TOXICITY.
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Iron uptake and homeostasis related genes in potato cultivated in vitro under iron deficiency and overload.
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Potato is one of the most important staple food in the world because it is a good source of vitamin C, vitamin B6 but also an interesting source of minerals including mainly potassium, but also magnesium, phosphorus, manganese, zinc and iron to a lesser extent. The lack of iron constitutes the main
The three-dimensional distribution of minerals in potato tubers.
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OBJECTIVE
The three-dimensional distributions of mineral elements in potato tubers provide insight into their mechanisms of transport and deposition. Many of these minerals are essential to a healthy human diet, and characterizing their distribution within the potato tuber will guide the effective
Manganese-enhanced magnetic resonance imaging for mapping of whole brain activity patterns associated with the intake of snack food in ad libitum fed rats.
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Non-homeostatic hyperphagia, which is a major contributor to obesity-related hyperalimentation, is associated with the diet's molecular composition influencing, for example, the energy content. Thus, specific food items such as snack food may induce food intake independent from the state of satiety.
Using spectrophotometry and spectral mapping technique for the study of the production of manganese-dependent and manganese-independent peroxidases by Pleurotus ostreatus.
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The activity of manganese-dependent and manganese-independent peroxidases produced by Pleurotus ostreatus in culture media composed of agro-residues was measured by visible spectrophotometry. The overall enzyme activity and its selectivity were separated by using spectral mapping technique followed
The "manganese(III)-containing" purple acid phosphatase from sweet potatoes is an iron enzyme.
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An improved purification of the purple acid phosphatase from sweet potatoes has been developed, and the properties of the enzyme have been reexamined. Contrary to previous reports, (e.g., Y. Sugiura, et al., J. Biol. Chem., 256, 10664-10670 (1981) ), the enzyme contains two moles of iron and
Purification, enzymatic properties, and active site environment of a novel manganese(III)-containing acid phosphatase.
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A new manganese-containing acid phosphatase has been isolated and crystallized from sweet potato tubers. The pure enzyme contains one atom of manganese per Mr = 110,000 polypeptide and shows phosphatase activity toward various phosphate substrates. The pH optimum of the enzyme was 5.8 and the enzyme
A purple acid phosphatase from sweet potato contains an antiferromagnetically coupled binuclear Fe-Mn center.
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A purple acid phosphatase from sweet potato is the first reported example of a protein containing an enzymatically active binuclear Fe-Mn center. Multifield saturation magnetization data over a temperature range of 2 to 200 K indicates that this center is strongly antiferromagnetically coupled.
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