Nitrogen metabolism in relation to water stress. Chapter 19
Pearson, J.
Nitrogen metabolism in relation to water stress. Chapter 19 - 1987 - Printed
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
English
0-471-91650-1
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
Triticum
94-097606
Nitrogen metabolism in relation to water stress. Chapter 19 - 1987 - Printed
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
English
0-471-91650-1
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
Triticum
94-097606