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פותח על ידי קלירמאש פתרונות בע"מ -
Nitrate Reductase Activity of Wheat Seedlings during Exposure to and Recovery from Water Stress and Salinity
Year:
1974
Source of publication :
Physiologia Plantarum
Authors :
פלאוט, צבי
;
.
Volume :
30
Co-Authors:
PLAUT, Z., Agricultural Research Organization, Bet Dagan, Israel, Department of Life-Sciences, Bar Ilan University, Ramat-Gan, Israel
Facilitators :
From page:
212
To page:
217
(
Total pages:
6
)
Abstract:
Nitrate reductase activity was inhibited as a result of reduced soil moisture potentials or application of NaCI to nutrient solutions. The decrease in enzyme activity of wheat seedlings exposed to salinity, was found 24 hours after exposure to stress. The effect of stress on nitrate reductase was found in cell‐free extracts as well as in riro in assays of intact leaf sections. A recovery in enzyme activity was found after irrigation or after removal of seedlings from salinity. While relative water content of the leaves was restored within 3 hours after removal of stress, full recovery of enzyme activity occurred only after 24 hours. Cycloheximide and chloramphenicol suppressed the activity of nitrate reductase in non‐stressed seedlings, but had no effect on the activity of plants exposed to salinity. However, during removal of stress, cycloheximide prevented completely the recovery of nitrate reductase, while chloramphenicol did not interfere with the recovery of the inhibited enzyme activity. It is concluded that a fraction of nitrate reductase may be located in the cytoplasm and lost activity during stress, probably due to inhibited protein synthesis. Another fraction which may be associated with chloroplasts, was inhibited by stress due to conformational changes or partial denaturation. Copyright © 1974, Wiley Blackwell. All rights reserved
Note:
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More details
DOI :
10.1111/j.1399-3054.1974.tb03646.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
26672
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:24
Scientific Publication
Nitrate Reductase Activity of Wheat Seedlings during Exposure to and Recovery from Water Stress and Salinity
30
PLAUT, Z., Agricultural Research Organization, Bet Dagan, Israel, Department of Life-Sciences, Bar Ilan University, Ramat-Gan, Israel
Nitrate Reductase Activity of Wheat Seedlings during Exposure to and Recovery from Water Stress and Salinity
Nitrate reductase activity was inhibited as a result of reduced soil moisture potentials or application of NaCI to nutrient solutions. The decrease in enzyme activity of wheat seedlings exposed to salinity, was found 24 hours after exposure to stress. The effect of stress on nitrate reductase was found in cell‐free extracts as well as in riro in assays of intact leaf sections. A recovery in enzyme activity was found after irrigation or after removal of seedlings from salinity. While relative water content of the leaves was restored within 3 hours after removal of stress, full recovery of enzyme activity occurred only after 24 hours. Cycloheximide and chloramphenicol suppressed the activity of nitrate reductase in non‐stressed seedlings, but had no effect on the activity of plants exposed to salinity. However, during removal of stress, cycloheximide prevented completely the recovery of nitrate reductase, while chloramphenicol did not interfere with the recovery of the inhibited enzyme activity. It is concluded that a fraction of nitrate reductase may be located in the cytoplasm and lost activity during stress, probably due to inhibited protein synthesis. Another fraction which may be associated with chloroplasts, was inhibited by stress due to conformational changes or partial denaturation. Copyright © 1974, Wiley Blackwell. All rights reserved
Scientific Publication
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