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פותח על ידי קלירמאש פתרונות בע"מ -
Salt and oxidative stress: Similar and specific responses and their relation to salt tolerance in citrus
Year:
1997
Source of publication :
Planta
Authors :
בן חיים, גוזל
;
.
דהן, ירדנה
;
.
יניב, זהרה
;
.
Volume :
203
Co-Authors:
Gueta-Dahan, Y., Institute of Horticulture, ARO, Volcani Center, Bet Dagan, Israel
Yaniv, Z., Institute of Field and Garden Crops, ARO, Volcani Center, Bet Dagan, Israel
Zilinskas, B.A., Plant Science Department, Rutgers University, New Brunswick, NJ 08903-0231, United States
Ben-Hayyim, G., Institute of Horticulture, ARO, Volcani Center, Bet Dagan, Israel
Facilitators :
From page:
460
To page:
469
(
Total pages:
10
)
Abstract:
Salt damage to plants has been attributed to a combination of several factors including mainly osmotic stress and the accumulation of toxic ions. Recent findings in our laboratory showed that phospholipid hydroperoxide glutathione peroxidase (PHGPX), an enzyme active in the cellular antioxidant system, was induced by salt in citrus cells and mainly in roots of plants. Following this observation we studied the two most important enzymes active in elimination of reactive oxygen species, namely, superoxide dismutase (SOD) and ascorbate peroxidase (APX), to determine whether a general oxidative stress is induced by salt. While Cu/Zn-SOD activity and cytosolic APX protein level were similarly induced by salt and methyl viologen, the response of PHGPX and other APX isozymes was either specific to salt or methyl viologen, respectively. Unlike PHGPX, cytosolic APX and Cu/Zn-SOD were not induced by exogenously added abscisic acid. Salt induced a significant increase in SOD activity which was not matched by the subsequent enzyme APX. We suggest that the excess of H2O2 interacts with lipids to form hydroperoxides which in turn induce and are removed by PHGPX. Ascorbate peroxidase seems to be a key enzyme in determining salt tolerance in citrus as its constitutive activity in salt-sensitive callus is far below the activity observed in salt-tolerant callus, while the activities of other enzymes involved in the defence against oxidative stress, namely SOD, glutathione reductase and PHGPX, are essentially similar.
Note:
Related Files :
citrus fruit
drug effect
Glutathione peroxidase
metabolism
peroxidase
salt stress
superoxide dismutase
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/s004250050215
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24400
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:07
Scientific Publication
Salt and oxidative stress: Similar and specific responses and their relation to salt tolerance in citrus
203
Gueta-Dahan, Y., Institute of Horticulture, ARO, Volcani Center, Bet Dagan, Israel
Yaniv, Z., Institute of Field and Garden Crops, ARO, Volcani Center, Bet Dagan, Israel
Zilinskas, B.A., Plant Science Department, Rutgers University, New Brunswick, NJ 08903-0231, United States
Ben-Hayyim, G., Institute of Horticulture, ARO, Volcani Center, Bet Dagan, Israel
Salt and oxidative stress: Similar and specific responses and their relation to salt tolerance in citrus
Salt damage to plants has been attributed to a combination of several factors including mainly osmotic stress and the accumulation of toxic ions. Recent findings in our laboratory showed that phospholipid hydroperoxide glutathione peroxidase (PHGPX), an enzyme active in the cellular antioxidant system, was induced by salt in citrus cells and mainly in roots of plants. Following this observation we studied the two most important enzymes active in elimination of reactive oxygen species, namely, superoxide dismutase (SOD) and ascorbate peroxidase (APX), to determine whether a general oxidative stress is induced by salt. While Cu/Zn-SOD activity and cytosolic APX protein level were similarly induced by salt and methyl viologen, the response of PHGPX and other APX isozymes was either specific to salt or methyl viologen, respectively. Unlike PHGPX, cytosolic APX and Cu/Zn-SOD were not induced by exogenously added abscisic acid. Salt induced a significant increase in SOD activity which was not matched by the subsequent enzyme APX. We suggest that the excess of H2O2 interacts with lipids to form hydroperoxides which in turn induce and are removed by PHGPX. Ascorbate peroxidase seems to be a key enzyme in determining salt tolerance in citrus as its constitutive activity in salt-sensitive callus is far below the activity observed in salt-tolerant callus, while the activities of other enzymes involved in the defence against oxidative stress, namely SOD, glutathione reductase and PHGPX, are essentially similar.
Scientific Publication
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