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Indian Journal of Experimental Biology (IJEB) >
IJEB Vol.50 [2012] >
IJEB Vol.50(05) [May 2012] >
| Title: | Nitric oxide alleviates oxidative damage induced by high temperature stress in wheat |
| Authors: | Bavita, A
Shashi, B
Navtej, S B |
| Keywords: | Antioxidant enzymes
High temperature stress
Lipid peroxidation
Sodium nitroprusside
Wheat |
| Issue Date: | May-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Effect of
sodium nitroprusside (SNP), a donor of nitric oxide (NO) was examined in two
wheat (Triticum aestivum L.)
cultivars, C 306 (heat tolerant) and PBW 550 (comparatively heat susceptible)
to study the extent of oxidative injury and activities of antioxidant enzyme in
relation to high temperature (HT) stress. HT stress resulted in a marked
decrease in membrane thermostability (MTS) and 2, 3, 5-triphenyl tetrazolium
chloride (TTC) cell viability whereas content of lipid peroxide increased in
both the cultivars. The tolerant cultivar C 306 registered less damage to
cellular membranes compared to PBW 550 under HT stress. Activities of
antioxidant enzymes viz, superoxide dismutase, catalase, ascorbate peroxidase,
guaicol peroxidase and glutathione reductase increased with HT in both the
cultivars. Following treatment with SNP, activities of all antioxidant enzymes
further increased in correspondence with an increase in MTS and TTC.
Apparently, lipid peroxide content was reduced by SNP more in shoots of heat
tolerant cultivar C 306 indicating better protection over roots under HT
stress. The up-regulation of the antioxidant system by NO possibly contributed
to better tolerance against HT induced oxidative damage in wheat. |
| Page(s): | 372-378 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-1009 (Online); 0019-5189 (Print) |
| Source: | IJEB Vol.50(05) [May 2012]
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