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Wednesday, August 5, 2020 | History

2 edition of assimilation of nitrate in the higher plant. found in the catalog.

assimilation of nitrate in the higher plant.

William Wallace

assimilation of nitrate in the higher plant.

by William Wallace

  • 247 Want to read
  • 26 Currently reading

Published .
Written in English


Edition Notes

Thesis (Ph. D.)--The Queen"s University of Belfast, 1966.

The Physical Object
Pagination1 v
ID Numbers
Open LibraryOL19926564M

Table of Contents. Nitrate Assimilation: Historical Resume ASSIMILATION OF NITRATE AND AMMONIUM: Sources of Nitrogen, Nitrogen Cycle, Root Structure, and Nitrogen Assimilation; Transport of Nitrate by Roots; Nitrate Assimilation: Nitrate and Nitrite Reductases; Ammoniacal Nutrition of Plants; Ammonium Assimilation; Integration of Nitrate Uptake in the Whole Plant SYMBIOTIC ASSIMILATION Nitrate reductase is a key enzyme in nitrogen assimilation, and it catalyzes the nitrate-to-nitrite reduction process in plants. A variety of factors, including nitrate, light, metabolites, phytohormones, low temperature, and drought, modulate the expression levels of nitrate reductase genes as well as nitrate reductase activity, which is consistent with its physiological ://

Nitrate assimilation 1. Nitrate Assimilation Ajay Prakash Uniyal Plant Sciences Central University of Punjab 2. • Plants assimilate most of the nitrate absorbed by their roots into organic nitrogen compounds. • The first step of this process is the reduction of nitrate to nitrite in the cytosol (Oaks ).   Andrews, M. () The partitioning of nitrate assimilation between root and shoot of higher plants. Plant Cell Environ. 9: – Becker, T. W., Perrot-Rechenmann, C., Suzuki, A., and Hirel, B. () Subcellular and immunocytochemical localization of the enzymes involved in ammonia assimilation in mesophyll and bundle-sheath cells of

  (Smirnoff and Stewart, ). The partitioning of nitrate assimilation between roots and shoots in higher plants could be defined by the relative proportion of the total plant NR activity in these two plant organs or/and by the relative concentration of nitrate and reduced nitrogen in the xylem (Andrews, a). This is because The assimilation of inorganic N, in the form of ammonia, onto C skeletons for the production of amino acids is one of the most important biochemical processes in plants. In an actively growing plant, N is taken up as nitrate and to a lesser extent as ammonia. Nitrate is reduced in the cytoplasm


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Assimilation of nitrate in the higher plant by William Wallace Download PDF EPUB FB2

Nitrate assimilation pathway in higher plants: critical role in nitrogen signalling and utilization Article (PDF Available) in Plant Science Today 7(2) April with Reads M.

ANDREWS, The partitioning of nitrate assimilation between root and shoot of higher plants, Plant, Cell & Environment, /ep, 9, 7, (), ().

Wiley Online Library M. ANDREWS, Nitrate and reduced‐N concentrations in the xylem sap of Stellaria media, Xanthium strumarium and six legume species, Plant, Cell The third volume in the Plant Ecophysiology series integrates functional and molecular physiology with ecophysiological and sustainable agricultural approaches to get a better understanding of the regulation and the impact of environmental and stress signals on nitrogen acquisition and assimilation.

The book is of interest for advanced students   Book contents; Biology of the Nitrogen Cycle. Biology of the Nitrogen Cycle.

Pages higher plant (and algal) W.H. CampbellMolecular control of nitrate reductase and other enzymes involved in nitrate assimilation.

C.H. Foyer, G. Noctor (Eds.), Photosynthetic Nitrogen Assimilation and Associated Carbon and Respiratory Abstract The partitioning of nitrate assimilation between root and shoot of higher plant species is indicated by the relative proportions of total plant nitrate reductase activity (NRA) in the two plant parts and the relative concentrations of nitrate and reduced N in the xylem sap.

These have been collated here from the literature and temperate and tropical species ://   Nitrogen Assimilation by Plants book.

Physiological, Biochemical, and Molecular Aspects. Integration of Nitrate Uptake in the Whole Plant. View abstract. part | 6 pages. PART II: SYMBIOTIC ASSIMILATION OF NITROGEN.

Proteolysis in Higher Plants: Nature, Function and Regulation. This book covers all aspects of the transfer of nitrogen from the soil and air to a final resting place in the seed protein of a crop plant.

It describes the physiological and molecular mechanisms of ammonium and nitrate transport and assimilation, including symbiotic nitrogen fixation by the ://   Exploration of nitrate-to-glutamate assimilation in non-photosynthetic roots of higher plants by studies of 15 N-tracing, enzymes involved, reductant supply, and nitrate signaling: A review and synthesis The Effect of Tungstate on Nitrate Assimilation in Higher Plant Tissues Yair M.

Heimer, John L. Wray, and Philip Filner MSU/AEC Plant Research Laboratory, Michigan   Nitrate is absorbed by most plants and reduced to ammonia with the help of Nitrate reductase and nitrite reductase enzymes.

In first step, conversion of nitrate to nitrite is catalyzed by nitrate reductase enzyme and this enzyme has other important constituents like FAD, cytochrome, NADPH or NADH and :// Nitrate reductase (EC ) is an enzyme found in most higher plants and appears to be a key regulator of nitrate assimilation as a result of enzyme induction by nitrate.

The biochemistry of nitrate reductase has been elucidated to a great extent and the role that nitrate reductase plays in regulation of nitrate assimilation is becoming The Effect of Tungstate on Nitrate Assimilation in Higher Plant Tissues nitrate uptake and of other steps of the nitrate assimilation pathway in higher plants without the complications Nitrate assimilation was calculated as the difference in the rates of.

absorption and plant. accumulation. The rate of shoot accumulation was the amount of accumulated in the shoots during the measurement period divided by the :// The molecular genetics of nitrate assimilation process is now better understood than earlier. Transgenic tobacco (a non-legume) with altered levels of nitrate reductase activity have been produced, although it has not been possible to increase growth and productivity by increasing the expression of nitrate reductase gene in the :// Summary.

The assimilation of nitrate, nitrite and ammonia in barley, wheat, corn and bean leaves was studied using 15 N-labelled molecules and either leaf chamber experiments with the uptake of the nitrogen species in the transpiration stream, or vacuum-infiltration experiments.

The assimilation of 15 NO 3 − into amino nitrogen was strictly dependent on light and ceased abruptly when the The third volume in the Plant Ecophysiology series integrates functional and molecular physiology with ecophysiological and sustainable agricultural approaches to get a better understanding of the regulation and the impact of environmental and stress signals on nitrogen acquisition and assimilation.\" \"The book is of interest to advanced Abstract The partitioning of nitrate assimilation between root and shoot of higher plant species is indicated by the relative proportions of total plant nitrate reductase activity (NRA) in the two plant parts and the relative concentrations of nitrate and reduced N in the xylem sap.

These have been collated here from the literature and temperate and tropical species compared. Both the   Mechanism of nitrogen assimilation in plants: The process by which nitrogen is taken up by plants for the synthesis of proteins is called nitrogen assimilation. Higher plant absorbs nitrogen preferably in form nitrate.

Therefore nitrogen at what ever form it is present should be transformed in to available nitrate :// Nitrogen is an essential element for plant growth. During the green revolution nitrogenfertilisation was responsible for spectacular yield increases.

At present yield is balanced with commitments towards the environment and sustainable agriculture. For agro-biotechnology comprehensive knowledge of plant functioning is needed. Yield improvement and accumulation of essential nitrogen compounds This text contains pertinent information acquired over 20 years of research in the area of nitrogen metabolism and envisages new strategies to improve plant species of agronomic value by devising new techniques for growing them.

Contents Nitrate assimilation - historical ://. In higher plants, nitrate assimilation can take place in leaves as well as in roots, the contribution of each of these organs being dependent on the species and on the external nitrate concentration (Andrews, ).

We have studied several aspects of nitrate assimilation in L japonicus plants grown in different conditions of nitrogen.). The Lluta Valley in Northern Chile is an important agricultural area affected by both salinity and boron (B) toxicity. Zea mays L.

amylacea, an ecotype arisen because of the seed selection practiced in this valley, shows a high tolerance to salt and B levels. In the present study the interaction between B and salt was studied after 20 days of treatment at low ( mM) and high salinity ( mM Nitrate supply improved chlorophyll (Chl) content and photosystem II (PSII) photochemistry of infected S.

bicolor that, in comparison to S. hermonthica, displayed a low imbalance between C and N assimilation when nitrate was supplied up to mg N per plant.

Indeed, nitrate supplies increased strongly the leaf N:C ratio of the parasite. The