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פותח על ידי קלירמאש פתרונות בע"מ -
Nitrate and Nitrite Reduction in Wheat Leaves as Affected by Different Types of Water Stress
Year:
1979
Source of publication :
Physiologia Plantarum
Authors :
הויאר, ברוריה
;
.
פלאוט, צבי
;
.
Volume :
46
Co-Authors:
HEUER, B., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
PLAUT, Z., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
FEDERMAN, E., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
318
To page:
323
(
Total pages:
6
)
Abstract:
The effect of different types of water stress on nitrate and nitrite reductases of wheat (Triticum vulgare L. cv. Mivhor) leaves was investigated. Water stress was applied either to leaf tissue by its incubation in mannitol or various salt solutions, or to intact plants by exposure of the root system to low temperatures or to salinity. Nitrite reductase was much less sensitive to water stress than nitrate reductase, and was not sensitive to salinity up to osmotic potentials of about — 13 bars. The decrease in nitrite reductase activity by water stress was attributed to a direct inhibition of the enzyme rather than to a repression of enzyme synthesis. This was based on the fast response of the enzyme after exposure of leaf tissue to reduced osmotic potential, on the lack of a continuous decrease in enzyme activity during a prolonged stress, and on the fact that light activation of reductase was unaffected by water stress. The inhibition of nitrate reductase under water stress was attributed to both a direct inhibition and a reduced rate in enzyme synthesis. This is concluded from the fact that a decrease in its activity was obtained already within 1 h after stress application and from the fact that light induction of the enzyme was inhibited by stress. Copyright © 1979, Wiley Blackwell. All rights reserved
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/j.1399-3054.1979.tb02627.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
20821
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:39
Scientific Publication
Nitrate and Nitrite Reduction in Wheat Leaves as Affected by Different Types of Water Stress
46
HEUER, B., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
PLAUT, Z., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
FEDERMAN, E., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Nitrate and Nitrite Reduction in Wheat Leaves as Affected by Different Types of Water Stress
The effect of different types of water stress on nitrate and nitrite reductases of wheat (Triticum vulgare L. cv. Mivhor) leaves was investigated. Water stress was applied either to leaf tissue by its incubation in mannitol or various salt solutions, or to intact plants by exposure of the root system to low temperatures or to salinity. Nitrite reductase was much less sensitive to water stress than nitrate reductase, and was not sensitive to salinity up to osmotic potentials of about — 13 bars. The decrease in nitrite reductase activity by water stress was attributed to a direct inhibition of the enzyme rather than to a repression of enzyme synthesis. This was based on the fast response of the enzyme after exposure of leaf tissue to reduced osmotic potential, on the lack of a continuous decrease in enzyme activity during a prolonged stress, and on the fact that light activation of reductase was unaffected by water stress. The inhibition of nitrate reductase under water stress was attributed to both a direct inhibition and a reduced rate in enzyme synthesis. This is concluded from the fact that a decrease in its activity was obtained already within 1 h after stress application and from the fact that light induction of the enzyme was inhibited by stress. Copyright © 1979, Wiley Blackwell. All rights reserved
Scientific Publication
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