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Heimer YM, Wray JL, Filner P (1969) The effect of tungstate on nitrate assimilation in higher plant tissues. Plant Physiol 44: 1197–1199. Article PubMed CAS Google Scholar Helyar KR (1978) Effects of aluminium and manganese toxicities on legume growth.
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This article examines the evidence that Rubisco, malic enzyme and phosphoglycolate phosphatase—the three enzymes in the chloroplast that catalyse the initial reactions of …
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Physiological effects of ammonium (NH 4 +) and nitrate (NO 3-) on tea have confirmed that tea plants prefer NH 4 + as the dominant nitrogen (N) source. To investigate the possible explanations for this preference, studies of 15 NH 4 + and 15 NO 3 - assimilation using hydroponically grown tea plants were conducted. During the time course of 15 NH 4 + …
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For higher plants, the essentiality of 14 elements is now well established, although the requirement for the micronutrients Cl and Ni is as yet restricted to a limited number of plant species. Progress in this research was closely related to the development of analytical chemistry, particularly in the purification of chemicals and analysis.
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Nitrate assimilation and translocation by higher plants: Comparative physiology and ecological consequences ... Plant Stress Metabolism Group, Dept of Botany, Birkbeck College, Malet Street, London WC1E 7HX, U.K. N. Smirnoff and G. R. Stewart (reprint requests)Search for more papers by this author. G. R. Stewart, Corresponding Author.
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Furthermore, high NH4⁺ supply, mycorrhizal infection and infection by parasitic plants can increase the proportion of total plant NO3⁻ assimilation carried out in the shoot while abiotic ...
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Plant root geometry and morphology are important for maximizing P uptake, because root systems that have higher ratios of surface area to volume will more effectively explore a larger volume of soil (Lynch, 1995).For this reason mycorrhizae are also important for plant P acquisition, since fungal hyphae greatly increase the volume of soil that …
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Roots of the higher plants can assimilate inorganic nitrogen by an enzymatic reduction of the most oxidized form (+6) nitrate to the reduced form (-2) glutamate. For such reactions, the substrates (originated from photosynthates) must be imported to supply energy through the reductant-generating sys …
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Therefore, the preferred form in which N is taken up depends on plant adaptation to soil conditions. Generally, plants adapted to low pH and reducing soils as found in mature forests or arctic tundra tend to take up ammonium or amino acids, whereas plants adapted to higher pH and more aerobic soils prefer nitrate (for a review see …
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After 15 NH 4 + and 15 NO 3 − were supplied, contents of 15 N in tea plants increased gradually during the whole treatment period (Fig. 1).There was a significantly higher level of 15 N in both tea plant roots and leaves supplied with 15 NH 4 + compared to those supplied with 15 NO 3 − throughout the 24 h experiment (Fig. 1).Relative to 15 …
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Manganese resembles Mg in its biochemical function and is involved in activating enzyme-catalysed reactions including phosphorylations, decarboxylations, reductions and …
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2. Nitrogen Uptake. N is an essential macronutrient for plants, and it can be acquired from the soil in inorganic forms (NO 3 − and NH 4 +), which are transported across the root plasma membrane by different families of transporters.Under normal soil conditions, N is mainly available in the form of NO 3 −, and four families of transporters mediate NO …
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Semantic Scholar extracted view of "Biochemical changes in barley plants after excessive supply of copper and manganese" by K. Demirevska-Kepova et al. ... The results allow us to conclude that the inactivation of the nitrogen assimilation pathway by Cd2+ in soybean nodules is due to an increment in GS and GOGAT oxidation that can be prevented ...
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Photorespiration involves the conversion of glycine to serine with the release of ammonia and CO2. In C3 terrestrial higher plants the flux through glycine and serine is so large that it results in the production of ammonia at a rate far exceeding that from reduction of new nitrogen entering the plant. The photorespiratory nitrogen cycle re …
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Manganese (Mn) Mn +2: Available: Millaleo et al. (2010) Mn +3 Mn +4: Unavailable Unavailable: Rengel (2000) 10: ... While the immobile plant nutrients are reached in the plants for assimilation with the root interception, microbial interaction and chelation process. ... Increasingly more multi-omics investigations of higher plants are …
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In higher plants, tetrapyrrole synthesis occurs in plastids, where it is initiated by the reduction of the glutamyl moiety of glutamyl-tRNA to glutamate-1-semialdehyde. ... and Carbon Assimilation ...
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Manganese (Mn) is an important micronutrient for plant growth and development and sustains metabolic roles within different plant cell compartments. ... (OEC) of the photosynthetic machinery, catalyzing the water-splitting reaction in ph … Manganese in Plants: From Acquisition to Subcellular Allocation Front Plant Sci. …
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Manganese in plant cells can exist as a cation, in various complexée! states or can form metallo-proteins in which tightly bound Mn atoms probably produce an appropriate …
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In soils, ammonium (NH 4 +) mainly results from the mineralisation of organic matter and represents besides nitrate (NO 3 −) the quantitatively most important source of nitrogen (N) for plant nutrition.In well-aerated agricultural soils, however, average annual NH 4 + concentrations are often 10 to 1000 times lower than those of NO 3 −, rarely exceeding …
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Plants of wheat, ryegrass, red clover, whiteClover, and Neptunia amplexicaul'is (a selenium accumulator) were grown in nutrient solutions containing 75Se-selenite ion and the root and shoot tissues fractionated to examine the products of selenite assimilation. Plants of wheat, ryegrass, red clover, white clover, and Neptunia amplexicaul'is (a selenium …
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Function of Manganese in Plants. Manganese is used in plants as a major contributor to various biological systems including photosynthesis, respiration, and nitrogen assimilation. Manganese is also involved in pollen germination, pollen tube growth, root cell elongation and resistance to root pathogens. Symptoms of Manganese Deficiency
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SinceCO 2 assimilation expressed per unit of chlorophyll was not different between high-Mn plants and control plants, it was concluded that the negative effect of Mn toxicity on CO 2 assimilation can be explained by a reduction in leaf chlorophyll content.
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DOI: 10.1017/S00286 Corpus ID: 84857790; The Direct Assimilation of Inorganic and Organic Forms of Nitrogen by Higher Plants @article{Hutchinson1912TheDA, title={The Direct Assimilation of Inorganic and Organic Forms of Nitrogen by Higher Plants}, author={H. B. Hutchinson and N. H. J. Miller}, …
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The data indicate some coordination between detoxication activity and energy metabolism during cell reaction to xenobiotic toxicity, and the intensification of contacts among cell organelles, especially between endoplasmic reticulum and mitochondria/plastids, was observed.
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Since plants take up phosphorus at a much higher rate than phosphorus diffuses into the soil surrounding the root, a phosphorus depletion zone is quickly established, limiting uptake of phosphorus ...
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Since plants take up phosphorus at a much higher rate than phosphorus diffuses into the soil surrounding the root, a phosphorus depletion zone is quickly established, limiting uptake of phosphorus ...
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Schematic and simplified representation of the nitrate uptake, transport and assimilation in roots and leaves of plants. (Adapted from Antonacci et al. 2007). The NO 3 − entered into the cell is ...
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Because manganese has a high redox potential, it oxidizes rapidly, quickly converting into Mn+3, Mn+4, Mn+5, Mn+6, and Mn+7; all of which cannot be taken up by the plant. The reality is like most heavy metals; manganese is an oxygen hog.
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It is generally considered that glutamate dehydrogenase is the enzyme that is chiefly responsible for the incorporation of nitrogen into the α-amino group of amino acids in the leaves of higher plants, but this is suggested not to be the case. IT is generally considered that glutamate dehydrogenase (EC.1.4.1.3) is the enzyme that is chiefly responsible for …
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Effects of manganese toxicity on leaf CO 2 assimilation of contrasting common bean genotypes. Alonso González, Alonso González. Dept of Horticulture, The Pennsylvania State Univ., University Park, PA 16802, USA. ... Since CO 2 assimilation expressed per unit of chlorophyll was not different between high-Mn plants and control plants, ...
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Abstract: Manganese, being an essential micronutrient plays crucial roles in physiological and biochemical processes in plants. The essentiality of available oxidised Manganese (Mn 2+) in most acid soils (toxic) at low pH (5.5) is recognised in plant processes. In contrast, Mn 2+ is insufficient at higher soil pH (up to 8.0) in alkaline soils. The present …
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Manganese (Mn) is an important micronutrient for plant growth and development and sustains metabolic roles within different plant cell compartments. The metal is an …
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