Abstract
Chilling tolerance adaptation in plant cell can be correlated with efficiency of antioxidant defence system, antioxidants and osmoprotectants. In this study, such responses were comparatively studied in four high yielding oats genotypes (OL-9, OL-10, OL-125, Kent) under control (25 °C) and chilling stress (5 °C) conditions. Cold temperature upregulated the activites of catalase, guaiacol peroxide, ascorbate peroxidase (APX), glutathione reductase in root and shoot of all four genotypes. The SOD enzyme activity was decreased in both organs by 32% with chilling stress. Chilling stress increased redox potential of plant cell significantly by increasing the level of ascorbate and glutathione in order to cope up the reactive oxygen species The concentration of proline, total phenol, total sugar, H2O2, soluble protein and free amino acids was increased with imposition of cold stress in both roots and shoots though a decline in MDA content was observed. The observed biochemical diversity revealed that catalase, APX, glutathione and sugars appeared to have greater role in conferring chilling tolerance in oats genotypes as indicated by their greater variations with cold stress.
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Abbreviations
- AA:
-
Ascorbate
- APX:
-
Ascorbate peroxidise
- AsA:
-
Reduced ascorbate
- CAT:
-
Catalase
- DHA:
-
Dehydroascorbate
- DHAR:
-
Dehydroascorbate reductase
- GPX:
-
Guaiacol peroxidise
- GSH:
-
Reduced glutathione
- GSSR:
-
Oxidized glutathione
- GR:
-
Glutathione reductase
- MDA:
-
Malondialdehyde
- NBT:
-
Nitro blue tetrazolium
- ROS:
-
Reactive oxygen species
- SOD:
-
Superoxide dismutase
- TBARS:
-
Thiobarbituric acid reactive substances
- WSC:
-
Water soluble carbohydrates
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Goyal, M., Kaur, N. Low temperature induced oxidative stress tolerance in oats (Avena sativa L.) genotypes. Ind J Plant Physiol. 23, 316–324 (2018). https://doi.org/10.1007/s40502-018-0371-y
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DOI: https://doi.org/10.1007/s40502-018-0371-y