Nitrogen Compounds In Plants Research Articles

Uptake and Utilization of Nitrogen from Organic Fertilizers Influenced by Different Doses of Copper

Copper is a microelement involved in the metabolism of nitrogen compounds in plants. Good utilization of nitrogen from soil and fertilizers by plants requires an adequate supply of copper. The aim of the study was to determine the effect of increasing levels of copper (100, 200, and 300 mg Cu·kg−1 of soil) applied together with various organic fertilizers (cattle manure, chicken manure, and spent mushroom substrate) on nitrogen content and uptake by cocksfoot (Dactylis glomerata L.) and the coefficient of nitrogen utilization from organic fertilizers. The pot experiment was carried out in three growing seasons (May–September) in greenhouse, and in this cocksfoot was grown and harvested four cuts in each year. Copper and organic fertilizers were applied once in the first year before sowing cocksfoot, and the after-effect was investigated in the second and third years. Application of different amounts of copper did not influence the nitrogen content in the biomass of cocksfoot. At the same time, soil application of this micronutrient in the amount of 100 mg Cu∙kg−1 of soil caused an increase in nitrogen uptake in the biomass of cocksfoot. Application of 100 and 200 mg Cu·kg−1 of soil caused an increase in the coefficient of nitrogen utilization from the organic fertilizers, which was highest effect in the case of cattle manure. All of the organic materials used increased the content of nitrogen and its uptake by cocksfoot, but the greatest effect was noted following application of chicken manure. The study showed no synergistic or antagonistic relationships between copper and nitrogen.

Изучение особенностей выращивания объектов аквакультуры ваквапонической установке совместно c растениями и бактериальным штаммом

The article touches upon the acute problems of eco-agriculture and decreasing quantity and quality of food products in large cities. The solution to the main problem of agriculture at present – namely, increasing the yield of biological products - should be obtained through the use of new technologies and modern methods of growing fish and agricultural products. Joint cultivation of different types of fish, agricultural plants and bacterial strains in a modular installation opens up enormous opportunities to make the production more efficient, to reduce the time for growing plants, and to obtain safe products. In cultivation process the waste products of farmed fish become the fertilizers for growing crops by the hydroponic method. The data on growing tilapia and strawberries in the aquaponic unit with addition of a bacterial strain are presented. In the course of the experiment there was analyzed the physiological state of tilapia: indicators of weight gain, fatness ratio. Joint cultivation of fish and plants in the unit leads to accumulating high concentrations of nitrogen compounds in plants, which not only gives the product unpleasant taste, but can also result in health problems of the end user. The accumulation of nitrates in plants reduces the diversity of farmed agricultural products. There was carried out an experiment on using bacterial isolate (bacterial strain) to reduce the proportion of nitrates in the system and accelerate the development of plants. Adding a bacterial strain to the plant reduced the level of nitrates. Besides, possessing the economically useful properties (stimulation of plant growth and development), the bacterial strain inhibited the development of pathogens. The practical value is the opportunity to get safe and environmentally friendly fish and vegetable products in a shorter time.

Diversity of plant nitrogenous compounds: recent results from biodiversity

Diversity of plant nitrogenous compounds: recent results from biodiversity

Transporters for uptake and allocation of organic nitrogen compounds in plants

Nitrogen is an essential macronutrient for plant growth. Following uptake from the soil or assimilation within the plant, organic nitrogen compounds are transported between organelles, from cell to cell and over long distances in support of plant metabolism and development. These translocation processes require the function of integral membrane transporters. The review summarizes our current understanding of the molecular mechanisms of organic nitrogen transport processes, with a focus on amino acid, ureide and peptide transporters.

Egg Production and Population Growth of the Citrus Red Mite (Acari: Tetranychidae) on Differentially Irrigated Citrus Trees

We determined the effect of moderate (20%), continuous water stress of citrus trees on the egg production and population growth of the citrus red mite, Panonychus citri (McGregor). We also measured differences in individual and total free amino acids, soluble protein, total nitrogen, and percentage of soluble nitrogen to determine if water stress influenced the concentration of soluble nitrogenous compounds. Although this level of water stress can reduce yield directly, we observed no consistent effect of irrigation on concentrations of nitrogenous compounds. Temporal or ontogenetic variation among trees more strongly affected concentration of plant nitrogenous compounds than irrigation. The three citrus cultivars examined— Citrus limon (L.) Burman f. cv. Eureka, and Citrus sinensis (L.) Osbeck cv. Valencia and cv. Washington Navel—also varied in sensitivity to differential irrigation; lemon was least sensitive and ‘Washington Navel’ orange was most. Egg production rates were independent of irrigation level. Mite population growth on commercial, differentially irrigated ‘Washington Navel’ trees also was independent of irrigation level. When P. citri activity is expected to be greatest, differential irrigation is expected to have minimal influence on P. citri populations. The direct effects of suboptimal irrigation on yield probably are of more economic importance than any indirect effects of altering host tree suitability to mites.

Metabolism of inorganic nitrogen compounds in plants and micro-organisms.

Research Article| June 01 1972 Metabolism of inorganic nitrogen compounds in plants and micro-organisms D J D Nicholas D J D Nicholas Search for other works by this author on: This Site PubMed Google Scholar Biochem J (1972) 128 (1): 24P. https://doi.org/10.1042/bj1280024Pa Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter LinkedIn Cite Icon Cite Get Permissions Citation D J D Nicholas; Metabolism of inorganic nitrogen compounds in plants and micro-organisms. Biochem J 1 June 1972; 128 (1): 24P. doi: https://doi.org/10.1042/bj1280024Pa Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentAll JournalsBiochemical Journal Search Advanced Search This content is only available as a PDF. © 1972 London: The Biochemical Society1972 Article PDF first page preview Close Modal You do not currently have access to this content.

The Movement of Organic Nitrogen Compounds in Plants: With two Figures in the Text

The hypothesis that the movement of organic nitrogen, like that of carbohydrate, is governed by the prevailing concentration gradients for the mobile compounds in the phloem has been tested by determining the effect on nitrogen distribution when normal translocation was interrupted by ringing in Pelargonium spp. and Vicia faba plants. Nitrogen compounds in the plant tissue were fractionated into protein, soluble protein, amide, amino-acid, peptide, nitrate, and ammonia nitrogen. The presence of short-chain peptides in the extracts was confirmed by paper chromatography. Results showed that accumulation above the ringed zone was confined to the soluble nitrogen fractions and that amino-acids and possibly peptides were involved in translocation. The direction of movement may be determined by the prevailing concentration gradients of these compounds in the phloem tissue.