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Nitrogen metabolism in relation to water stress. Chapter 19

By: Pearson, J | Improving Winter Cereals for Moisture-limiting Areas. Capri (Italy). 27-31 Oct 1985.
Contributor(s): Smirnoff, N [coaut.] | Stewart, G.R [coaut.] | Turner, L.B [coaut.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: 1987ISBN: 0-471-91650-1.Subject(s): Crops | Gramineae | Inorganic acid salts | Metabolism | Miscellaneous plant disorders | Plant anatomy | Plant physiology | Plant physiology and biochemistry | Plant vegetative organs | Resistance to injurious factors | Salts | Soil water balance | Stress | Water balance | TriticumDDC classification: 94-097606 In: Srivastava, J.P.; Acevedo,-E.; Varma,-S. (ICARDA, Aleppo (Syria)); Porceddu,-E. (University of Tuscia, Viterbo (Italy). Inst. of Agricultural Biology) (eds.). National Research Council of Italy, Viterbo (Italy); International Center for Agricultural Research in the Dry Areas, Aleppo (Syria). Drought tolerance in winter cereals: proceedings of an international workshop. Chichester (United Kingdom). John Wiley and Sons. 1987. p. 241-253Summary: The role of nitrate and organic nitrogen compounds in relation to water and also aspects of nitrogen acquisition, biosynthesis, and cycling is considered. Both laboratory- and field-grown plants (on a line-source sprinkler) for metabolites, such as nitrate, proline, and other amino acids are analyzed. In the barley varieties tested these all increase in concentration with increased water deficit. Such compounds are thought to act as osmoticants. Total reduced nitrogen also increases in drought-stressed plants, and the so-called drought susceptibility of nitrate reductase was questioned. The quantitative changes of amino acids in stressed barley have been used to construct a metabolic index of stress which correlates very well with rates of water loss from leaves. This may be useful in characterizing the susceptibility of plants to drought stressCollection: AGRIS Collection
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Reprint Reprint CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

AGRIS Collection 94-097606 (Browse shelf) Available
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1 tables; 9 fig. 12 ref. Summary (En)

The role of nitrate and organic nitrogen compounds in relation to water and also aspects of nitrogen acquisition, biosynthesis, and cycling is considered. Both laboratory- and field-grown plants (on a line-source sprinkler) for metabolites, such as nitrate, proline, and other amino acids are analyzed. In the barley varieties tested these all increase in concentration with increased water deficit. Such compounds are thought to act as osmoticants. Total reduced nitrogen also increases in drought-stressed plants, and the so-called drought susceptibility of nitrate reductase was questioned. The quantitative changes of amino acids in stressed barley have been used to construct a metabolic index of stress which correlates very well with rates of water loss from leaves. This may be useful in characterizing the susceptibility of plants to drought stress

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