Fundamental, Ecological and Agricultural Aspects of Nitrogen Metabolism in Higher Plants: Proceedings of a symposium organized by the Department of Plant Physiology, University of Groningen and the Institute for Soil Fertility, Haren, 9–12 April 1985

Front Matter....Pages i-xix
Front Matter....Pages 1-1
Regulation of the absorption and release of nitrate by plant cells: A review of current ideas and methodology....Pages 3-27
The influence of the form and concentration of inorganic nitrogen supplied on nitrogen uptake by Ankistrodesmus falcatus ....Pages 29-31
Nitrate uptake and reduction in sugar-beet seedlings....Pages 33-36
Effects of root temperature on uptake of nitrate and ammonium ions by barley grown in flowing-solution culture....Pages 37-40
Nitrate-uptake characteristics of roots as affected by nitrate supply....Pages 41-45
A substrate cycling model for nitrate uptake by Pisum sativum seedlings: A key to sensitivity of response of net flux to substrate and effectors?....Pages 47-51
Nitrate and ammonium absorption by plants growing at a sufficient or insufficient level of phosphorus in nutrient solutions....Pages 53-58
Flow of N and activities of N-assimilating enzymes in roots of N-limited Pisum sativum ....Pages 59-63
Patterns of N uptake, accumulation and assimilation in Lemna gibba when grown with exponentially increasing daily doses of N....Pages 65-69
Translocation and metabolism of nitrogen: whole plant aspects....Pages 71-96
Cycling of amino-nitrogen between shoots and roots in wheat seedlings....Pages 97-100
Nitrogen retranslocation in plants of maize, lupin and cocklebur....Pages 101-105
Amino acid loading by minor veins of Commelina benghalensis : an integration of structural and physiological aspects....Pages 107-110
Tobacco mutants of amino acid membrane transport: Uptake of L-valine in leaf discs from the double mutant Val r -2 and its monogenic derivatives....Pages 111-114
Sink control of amino acid transport into developing seeds of Vicia faba and Pisum sativum ....Pages 115-117
Amino acid efflux from seed coats and from cotyledons of developing and germinating pea seeds....Pages 119-121
Translocation of labelled nitrogen in oilseed rape....Pages 123-125
Front Matter....Pages 127-129
Biochemical aspects of nitrogen metabolism in a whole plant context....Pages 131-131
An evaluation of the stoichiometry of in vitro nitrate assimilation in Zea mays ....Pages 133-151
Front Matter....Pages 153-157
Influence of boron on nitrate reductase activity in roots of Zea mays ....Pages 131-131
The influence of light and dark conditions on the reduction of nitrate in leaves and roots of maize....Pages 159-164
Root contribution to nitrate reduction in barley seedlings ( Hordeum vulgare L.)....Pages 165-168
Nitrogen metabolism in plastids of pea roots....Pages 169-172
Isozymes of glutamine synthetase in chickpea....Pages 173-176
Partitioning of reduced nitrogen derived from exogenous nitrate in maize roots: Initial priority for protein synthesis....Pages 177-179
A cysteine-stimulated in vitro inactivation of barley leaf nitrate reductase....Pages 181-185
 15 N nuclear magnetic resonance spectroscopy: a powerful tool to study amino acid biosynthesis in higher plants....Pages 187-190
Separation of amino acids by high performance liquid chromatography....Pages 191-195
Glutathione, a tripeptide which may function as a temporary storage compound of excessive reduced sulphur in H 2 S fumigated spinach plants....Pages 197-202
The effect of sulfide in the ambient air on amino acid metabolism of spinach leaves....Pages 203-206
Nitrogen uptake, assimilation and transport in barley in the presence of atmospheric nitrogen dioxide....Pages 207-209
Effect of light quality on the alanine and aspartate aminotransferases in Wolffia arrhiza L.....Pages 211-214
Senescence and nitrogen metabolism in annual plants....Pages 215-218
Water relations of cowpea fruits during development....Pages 219-234
Turnover of peroxisomal proteins: Mechanistic aspects of catalase turnover in greening sunflower cotyledons....Pages 235-238
Influence of partial defoliation of green pepper on the senescence, growth, and nitrate reductase of the remaining leaf....Pages 239-244
Chloroplast lipid constituents from leaves of rape plants as affected by nitrogen....Pages 245-249
Front Matter....Pages 251-257
Interactions between nitrogen and carbon metabolism in a whole plant context....Pages 259-259
Dependence of nitrate reduction on root soluble carbohydrates in wheat seedlings....Pages 261-278
Front Matter....Pages 279-282
Effect of nitrogen nutrition on photosynthetic apparatus of wheat during tillering....Pages 259-259
The distribution of inorganic nitrogen and nitrate assimilation in different regions of a Zea mays leaf....Pages 283-288
A photosynthetic and 15 N investigation of the differential growth response of barley to nitrate, ammonium, and nitrate + ammonium nutrition....Pages 289-294
Nitrate or ammonium nutrition in french bean....Pages 295-300
Modification of 14 C photodistribution into C 4 acids in maize leaves by type of nitrogen supply....Pages 301-303
Refixation of photorespiratory ammonia and the role of alanine in photorespiration: Studies with 15 N....Pages 305-307
Effects of the glutamine synthetase inhibitor methionine sulfoximine on CO 2 fixation in Lemna gibba ....Pages 309-313
Distribution of leaf nitrogen concentration in relation to leaf light exposure in peach tree canopies....Pages 315-318
A simulation model of growth and C and N metabolism in young maize plants....Pages 319-321
Front Matter....Pages 323-327
Nitrogen assimilation in an ecological context....Pages 329-329
Nitrate reduction in the leaves and numbers of nitrifiers in the rhizosphere of Plantago lanceolata growing in two contrasting sites....Pages 331-346
Responses of Plantago species to various exponential addition rates of nitrate: A brief report....Pages 347-350
Growth, ionic balance, proton excretion, and nitrate reductase activity in Alnus and Hippophaë supplied with different sources of nitrogen....Pages 351-353
Effect of nodulation on the nitrate assimilation in vegetative soybean plants....Pages 355-358
Front Matter....Pages 359-363
Quantitative relationships for the dependence of growth rate of arable crops on their nitrogen content, dry weight and aerial environment....Pages 365-365
The course of nitrogen uptake by spring barley from soil and fertilizer nitrogen....Pages 367-387
Nitrogen assimilation in field-grown winter wheat: Direct measurements of nitrate reduction in roots using 15 N....Pages 389-393
Nitrogen redistribution and its loss in wheat....Pages 395-398
Influence of the level of nitrogen application on the carbon and nitrogen distribution in selected wheat varieties....Pages 399-401
Interactions between nitrate uptake and N 2 fixation in white clover....Pages 403-406
Front Matter....Pages 407-410
Accumulation and reduction of nitrate in cereal plants dependent on N supply....Pages 365-365
Supply of soil nitrogen to the plant during the growing season....Pages 411-416
Nitrogen supply from some soil types with various organic-matter treatments....Pages 417-432
Dependence of soil mineral N on N-fertilizer application....Pages 433-437
A kinetic approach to determine mineralisable soil nitrogen....Pages 439-442
Distribution of nitrate, exchangeable and non-exchangeable ammonium in the soil-root interface....Pages 443-446
Fate of sheep urine-N applied to an upland grass sward....Pages 447-450
Means of preventing nitrate accumulation in vegetable and pasture plants....Pages 451-453
Nitrate accumulation in spinach: Uptake and reduction of nitrate during a dark or a ‘low light’ night period....Pages 455-471
The role of nitrate in osmoregulation of Italian ryegrass....Pages 473-476
Does nitrate play a role in osmoregulation?....Pages 477-480
Reduction of the nitrate concentration of lettuce grown in recirculating nutrient solution....Pages 481-484
The effect of nitrogen fertilization on nitrate accumulation and yield of some field vegetables....Pages 485-488
Back Matter....Pages 489-492
....Pages 493-508